Flowserve BX2001 Durco User Manual

USER INSTRUCTIONS

Durco BX2001

High Performance Butterfly Valves

Installation

Operation

Maintenance

Experience In Motion

Quality

System

Certificate

FCD DVENIM0390-02

(Bulletin V-390e)

1

HOW TO SPECIFY BX2001 VALVES

Size Type Body Class Materials Seal Seat Operator Options

DURCO BX2001 USER INSTRUCTIONS ENGLISH 9-13

Valve Size

Selection Code

2 in (50 mm) 2
3 in (80 mm) 3
4 in (100 mm) 4
5 in (125 mm) 5
6 in (150 mm) 6
8 in (200 mm) 8
10 in (250 mm) 10
12 in (300 mm) 12

Selection Code

Big Max 2001 BX2

Lug L
Wafer W

ASME 150 Bidirectional 1
DIN PN10 2
ASME 150 End of Line Lug 4
DIN PN16 5
DIN PN20 7
ASME 300 Bidirectional 3
ASME 300 End of Line Lug 9
DIN PN25 0
DIN PN40 8

Selection Code

D4*z 1
DS*z 8
D4L L
D20 2
DMM 3
DNI 4
DC2 5

Selection Code

D4*z 1
D4L L
D20 2
DMM 3
DNI 4
DC2 5

Selection Code

17-4SS* 1
316SS S
C20H 2
K Monel 500 3
Nickel 4
Hastelloy B 5
Hastelloy C276 6

Selection Code

PTFE/Fiberglass A
Hastelloy B/PTFE B
C20/PTFE C
Hastelloy C/PTFE H
Inconel X750, APEX

or TriFlex +400°F I
Titanium/PTFE L

Selection Code

14 in (350 mm) 14
16 in (400 mm) 16
18 in (450 mm) 18
20 in (500 mm) 20
24 in (600 mm) 24
30 in (750 mm) 30
36 in (900 mm) 36

Type

Body

Class

Body Material

Selection Code

DC3 6
Ti 7
D2 9
DINC N
CK3M K
CD4MCu 0

Disc Material

Selection Code

DC3 6
Ti 7
D2 9
DINC N
CK3M K
CD4MCu 0

Shaft Material

Selection Code

Ti 7
N50A R
sN50 TriFlex T

+601°F
Ferralium 255 F
254 SMO K

Bearing Material

Selection Code

Inconel/PTFE N
316SS/PTFE z S
Monel/PTFE M
Nickel/PTFE 4
316 HCP (TriFlex*

or APEX +400°F) T

Code Selection
T TriFlex/Apex to 400°F

H TriFlex/Apex 401°F to 600°F
R TriFlex 601°F to 800°F
Y TriFlex 801°F to 1000°F
B Single 1/8" NPT Bleed/Inj. Port
P Two 1/8" NPT Purge Ports
L Bearing Lube (1/8" NPT Port)
C CL2 Cleaned
O O2 CleanedH
S Special CleaningH
N N.A.C.E. Trim (includes R shaft)
J Steam Jacket
D Steam Traced Disc
F Special Fasteners
I Inconel 718 Bellevilles lt
Z None
X Special Non-Standard

Code Selection
0 Locking Lever 2-8 in

1 Enclosed Gear
2 Pad Lockable Gear
9 Bare Stem

Code Selection
V PFA/Viton Energizer*

R PFA/Silicone Energizer
M PFA/Inconel Energizer
Z Fire Seal PFA/Inconel
N Inconel TriFlex u
 S 316/Inconel TriFlex
A Inconel APEX Class IV
C Copper/Inconel TriFlex
K Monel TriFlex
U UHMWPE (2" - 12")
4 Nickel/Inconel TriFlex

Code Selection
1 Single PTFE Cup & Cone*

2 Double PTFE Cup & Cone
3 Live Loaded Single Cup & Cone*
4 Live Loaded Double Cup & Cone**
7 Triple Seal Single PTFE
Cup & Cone (Self-Adjusting)
8 Triple Seal Double PTFE
Cup & Cone (Self-Adjusting)
9 Single Grafoil zt
0 Double Grafoil t

Options

Operator

Seat

Shaft Seal

1

1

* = Standard PFA Seat - All other materials considered optional.
** = 17-7 S.S. Belleville Washers included.
H = Customer specification must be given.

l = For use with Shaft Seals 3 & 4 only (17-7 Bellevilles Standard).

z = Standard Fire Sealed.

2

u = Standard TriFlex Seat - All other materials considered optional.

t = Grafoil Packing is NOT recommended with Belleville Washers.

s = ASTM A479 Xm19 Standard Triflex +601°F (315°C)

1

= Per Packing Gland

INTRODUCTION

The Big Max® BX2001 is a superior quality ASME Class 300
and 150 valve available in standard PFA, fire sealed and two
metal seated versions. Offered in 2 in through 36 in sizes and
in both wafer and lug body designs, all are available with a
wide variety of packing options to meet your routine or most
rigid service requirements.

BX2001 effectively contains fugitive process media emissions
regulated by the federal Clean Air Act, including chlorine,
hydrofluoric acid and anhydrous HCI. This valve is an ideal
choice for precise throttling control or on-off service with
lighter weight piping systems and less expensive, energy
efficient actuators.

DURCO BX2001 USER INSTRUCTIONS ENGLISH 9-13

Materials Selection Chart

DS = ASTM A216 Gr. WCB (CAST STEEL)

DSNI = NICKEL COATED CAST STEEL

D2 = ASTM A351 Gr. CF8 (304 SS)

D4 = ASTM A351 Gr. CF8M (316 S. S.)

D20 = ASTM A351 Gr. CN-7M (DURIMET 20)

CK3M = ASTM A351 Gr. CK-3MCuN (254 SMO)*

DINC = ASTM A494 Gr. CY-40 (INCONEL 600)**

DMM = ASTM A494 Gr. M35-1 (MONEL 400)**

DNI = ASTM A494 Gr. CA-100 (NICKEL 200)

DC2 = ASTM A494 Gr. N-7M (CHLORIMET 2)

DC3 = ASTM A494 Gr. CW-6M (CHLORIMET 3)

D44 = ASTM A351 Gr. CF-8M with controlled ferite

D4L = ASTM A351 Gr. CF-3M

*Registered trademark of Avesta AB
**Registered trademark of International Nickel Co. Inc.

PRESSURE CONTAINING FASTENERS

Material Selection

Selecting the proper fastener material is the ultimate responsi­bility of the customer because the supplier does not typically
know in what service the valves will be used or what elements
may be present in the environment. Flowserve normally
supplies B7 (carbon steel) for ductile cast iron and carbon
steel valves. For stainless steel and high alloy valves, B8 (stain­less steel) fasteners are supplied as standard. All fasteners
used must have a minimum yield strength of 40,000 PSI, a
minimum elongation of 12% and be compatible with the pro­cess fluid. Determining compatibility to the process fluid goes
beyond a material being resistant to general corrosion because
the more important consideration is a material’s resistance to
stress corrosion cracking. Depending on the service, it may
make sense to use B7 fasteners on high alloy valves. One such
service would be marine environments because of stainless
steel’s susceptibility to stress corrosion cracking in chloride
environ ments. Another key aspect of fasteners is frequent
visual inspection. Because of the common practice of using
steel fasteners rather than stainless steel to avoid chloride
stress corrosion cracking, visual inspection is recommended to
monitor the general corrosion of these fasteners. If jacketing or
insulation is used on a valve, it must be periodically removed
for visual inspection of the fasteners. If you wish assistance
in determining the proper fasteners to use, please refer to the
“Fasteners” chart (next page), or contact Flowserve’s Material
Engineering Group at [phone].

Design & Type

Flowserve’s valve design standards adopt ASME B18.2.1
(1981) as the standard for fastener type and design. This
national standard requires that finished hex “head” cap
screws be used when the head of the fastener is turned.
A finished hex “head” cap screw and a heavy hex cap screw
have a bearing surface under the head to minimize frictional
resistance during tightening. They also comply to qualified
body dimensions and fully formed head dimensions.
Cookeville Flow Control Division’s policy is to use finished
hex “head” and heavy hex “head” cap screws for all pressure
retaining fasteners. This includes top caps, packing ad justers,
bottom caps, body halves or other pressure retaining
components. Compliance is made with ASME B18.2.2 (1987),
Square and Hex Nuts, when studs and heavy hex nuts are
required. Additional information on these items may be
obtained from Flowserve Corporation, Cooke ville Flow
Control Division, Cookeville, Tennessee.

3

PRESSURE CONTAINING FASTENERS (continued)

FASTENERS

TABLE 1

Cap Screws-Studs
HHCS - Finished Heavy Hex Head Cap Screw

HCS - Finished Hex Head Cap Screw
SCS - Socket Head Cap Screw
STUD - Stud

Dimensions per ASME B18.2.1
Alloy identification stamp required on each piece.
Certification required.
Alloy Specification (40 KSI Minimum Yield Strength,
12% Min. El.)

ASTM Material Specifications

B840 - 316 Stainless Steel per ASTM A193, Grade B8M2 or

Grade B8M3, 40 KSI Min. Yield Strength, 12% Min. El.

B7 - Chromium - Molybdenum Alloy Steel per ASTM A193,

Grade B7

B7M - Chromium - Molybdenum Alloy Steel per ASTM A193,

Grade B7M, 100% hardness tested

B7MT - Chromium - Molybdenum Alloy Steel per ASTM A193,

Grade B7M, 100% hardness tested, PTFE coated, DuPont
SP11C, type B - Color blue or green

B8M - 316 Stainless Steel per ASTM A193, Grade B8M, Class 1,

40 KSI Min. Yield Strength, 12% Min. El.
B8C2 - 304 Stainless Steel per ASTM A193, Grade B8, Class 2
C20 - Carpenter C20, CB-3 (UNS N08020), ASTM B473, 40 KSI

Min. Yield Strength, 12% Min. El.
HC - Hastelloy C276 (UNS N10276), ASTM B574
I625 - Inconel 625 (UNS N006625), ASTM B446
I825 - Incoloy 825 (UNS N08825), ASTM B425, 40 KSI Min. Yield

Strength, 12% Min. El.
IN - Inconel 600 (UNS N0660), ASTM B166, 40 KSI Min. Yield

Strength, 12% Min. El.
M - Monel (UNS N04400), ASTM B164, Class A or B, 40 KSI Min.

Yield Strength, 12% Min. El.
HB - Hastelloy B (UNS 10665), ASTM B335
I718 - Incoloy 718, AMS 5596B
MKH - Monel K-500, Cold drawn and aged hardened, QQN-286

and ASTM F468
L7 - Chromium-Molybdenum Alloy Steel per ASTM A320, Grade

L7
L7M - Chromium-Molybdenum Alloy Steel per ASTM A320, Grade

L7M, 100% hardness tested
L7T - Chromium-Molybdenum Alloy Steel per ASTM A320, Grade

L7, PTFE coated, DuPont SP11C, Type B - Color blue or green
L7MT - Chromium-Molybdenum Alloy Steel per ASTM A320,

Grade L7M, 100% hardness tested, Teflon coated, DuPont

SP11C, Type B - Color blue or green
N - Nickel per ASTM B160 (UNS N0220), 40 KSI Min. Yield

Strength, 12% Min. El.
B7YC - Chromium-Molybdenum Steel per A193, Grade B-7,

Yellow Zinc Dichromate Plated

TABLE 2

Nuts
HN - Finished Heavy Hex Nut

XN - Finished Hex Nut
HXN - Regular Heavy Hex Nut
Dimensions per ASME B18.2.2
Alloy identification stamp is required on each piece.
Certification required.

ASTM Material Specifications

8 - 304 Stainless Steel per ASTM A194, Grade 8
8M - 316 Stainless Steel per ASTM A194, Grade 8M
2H - ASTM A194, Grade 2H
2HM - ASTM A194, Grade 2HM
7M - ASTM A194, Grade 7M, 100% hardness tested
7MT - ASTM A194, Grade 7M, 100% hardness tested, PTFE

M - Monel (UNS N04400), ASTM B164, Class A or B, or QQN-

HB - Hastelloy B (UNS N10665), ASTM B335
HC - Hastelloy C276 (UNS N10276), ASTM B574
I625 - Inconel 625 (UNS N06625), ASTM B446
I718 - Incoloy 718, AMS 5596B
I825 - Incoloy 825 (UNS N08825), ASTM B425
L7 - Chromium-Molybdenum Alloy Steel per ASTM A194, Grade

L7M - Chromium-Molybdenum Alloy Steel per ASTM A194,

MKH - Monel K-500, Cold drawn and aged hardened, QQN-286

8F - 303 Stainless Steel per ASTM A194, Grade 8F
2HYC - ASTM A194, Grade 2H, Yellow Zinc Dichromate Plated

DURCO BX2001 USER INSTRUCTIONS ENGLISH 9-13

coated, DuPont SP11C, Type B - Color blue or green

281, Class B

7

Grade 7M, 235 BHN Max, ASTM A320, Section 9

and ASTM F467

4

DURCO BX2001 USER INSTRUCTIONS ENGLISH 9-13

TABLE OF CONTENTS

SECTION TITLE PAGE

INTRODUCTION ................................................................................................................................................................. 3

I SAFETY PRECAUTIONS .....................................................................................................................................................5

II INSTALLATION .................................................................................................................................................................. 7

III VALVE REMOVAL .............................................................................................................................................................. 8

IV SEAT REPLACEMENT ........................................................................................................................................................ 8

STANDARD VALVE ............................................................................................................................................................ 9

FIRE SEALED VALVE ........................................................................................................................................................ 10

APEX CLASS IV METAL SEATED VALVE .......................................................................................................................... 11

TRIFLEX CLASS VI METAL SEATED VALVE ..................................................................................................................... 12

V PARTS LIST

STANDARD, FIRE SEALED AND END OF LINE 2" THRU 12" ............................................................................................. 13

TRIFLEX METAL SEAT 2" THRU 12" ................................................................................................................................. 14

APEX METAL SEAT 2" THRU 12" ...................................................................................................................................... 15

STANDARD AND FIRE SEALED 14" THRU 36" ................................................................................................................. 16

APEX CLASS IV METAL SEAT 14" THRU 36" .................................................................................................................... 18

TRIFLEX CLASS VI METAL SEAT ..................................................................................................................................... 19

VI SERVICE KITS .................................................................................................................................................................. 20

VII COMPLETE VALVE REPAIR ............................................................................................................................................. 21

VIII MANUAL GEAR OPERATOR INSTALLATION ....................................................................................................................26

IX CHANGING MANUAL GEAR OPERATOR QUADRANTS .................................................................................................... 26

X LOCKING LEVER HANDLE AND INDICATOR PLATE ........................................................................................................ 27

XI CHANGING LOCKING LEVER HANDLE QUADRANTS ....................................................................................................... 27

XII BX2001 VALVE DIMENSIONS FOR VALVES WITH ACTUATORS ..................................................................................... 28

XIII BX2001 VALVE DIMENSIONS FOR WAFER AND LUG VALVES ....................................................................................... 30

XIV BX2001 FLANGE DRILLING SPECIFICATIONS ................................................................................................................32

XV BX2001 VALVE AND OPERATOR WEIGHTS ..................................................................................................................... 33

XVI DIMENSIONS OF FASTENERS REQUIRED FOR INSTALLATION

CLASS 150 ....................................................................................................................................................................... 34

XVII DIMENSIONS OF FASTENERS REQUIRED FOR INSTALLATION

CLASS 300 ....................................................................................................................................................................... 35

SECTION I

SAFETY PRECAUTIONS

To avoid possible injury to personnel or damage to valve
parts, WARNING and CAUTION notes must be strictly
adhered to. Modifying this product, substituting nonfac tory
parts, or using maintenance procedures other than outlined
could drastically affect performance, be hazardous to per­sonnel and equipment, and may void existing warranties.

1. WARNING: Standard industry safety practices must be

adhered to when working on this, or any other, process
control product. Specifically, personal protective and lift­ing devices must be used as warranted.

2. Always completely remove the valve from service before
attempting any maintenance on the valve.

3. Depressurize and bleed the line on both sides of the valve
before removing the valve.

4. Check nameplate before installation to ensure that the
valve is not installed in systems where service conditions
exceed those for which the valve was designed.

5. Install or remove the valve with the disc in the closed
position.

5

DURCO BX2001 USER INSTRUCTIONS ENGLISH 9-13

SECTION I

SAFETY PRECAUTIONS (continued)

IMPORTANT NOTES ABOUT YOUR WARRANTY AND SAFETY

Replacement Parts

The use of parts and components other than those sup­plied by Flowserve Corporation could severely restrict
the operation and performance of this valve. Un auth orized
modifications or substitution of components can lead to
valve failure due to corrosion and/or premature failure
of the substituted parts.

Selection, Installation, Operation and Maintenance

Flowserve Corporation has established industry leader­ship in the design and manu fac ture of its products. When
properly select ed, each product is designed to perform
its intended function safely during its useful service life.
However, it is necessary that Flowserve’s customers be
fully aware of their responsi bilities when using these
products.
Each Flowserve product may be used in numerous
applications under a wide variety of industrial service
conditions. Although Flowserve can, and often does,
provide general guide lines, it is obviously not possible
to provide application specific data and warnings for all

conceivable applications. The purchaser/end user must
therefore assume the ultimate responsibility for the proper
selection, instal lation, operation and main tenance of the
products. Read the appropriate IOM before installing,
operating or repairing any valve. The purchaser/end user
should train its employees and/or contractors in the safe
use of the Flowserve products in connection with the
purchaser’s manufac turing processes.
Flowserve will continue to provide its customers with the
best possible products and service available. We do not
recommend substituting surplus or re manufac tured valves
over new Flowserve valves or those repaired in an autho­rized service center. Should you have any questions about
these provisions or about Flowserve’s products in general,
please contact your local Flowserve representative, who
will be happy to help.

Paying close attention to safety is always extremely impor­tant. However, there are often situations that require special
attention. These situations are indicated throughout this
book by the following symbols:

CAUTION – Hazards or unsafe practices which COULD
result in minor personal injury or product or property
damage.

DANGER – Immediate hazards which WILL result in severe
personal injury or death.

WARNING – Hazards or unsafe practices which COULD
result in severe personal injury or death.

NOTE: ALWAYS COORDINATE REPAIR ACTIVITY WITH OPERATIONS PERSONNEL, AND FOLLOW ALL

PLANT SAFETY REQUIREMENTS AND OSHA REGULATIONS.

6

SECTION II

DURCO BX2001 USER INSTRUCTIONS ENGLISH 9-13

INSTALLATION

(Please refer to and follow all recommendations of MSS SP-92)

1. Check valve nameplate before installation to ensure
that the valve’s pressure rating and materials of con­struction are compatible with the intended service con­ditions. If lug style, check for end of line service tag.

2. Inspect adjoining pipelines and remove any material
that could damage the seat. Check clearance of the
disc projection into the pipeline shown in TABLE B
and FIGURE 1.

3. Check actuator stops before valve is installed and the
line is pressurized. Make certain position indicator
reads “shut” and the disc position is in agreement.

4. The valve must be installed with the disc in the closed
position and centered on the seat.

5. The valve must be properly aligned and centered
between the pipe flanges.

6. The BX2001 is designed for bi-directional shut off
when installed between metallic ANSI B16.5 flanges.
Flow direction should agree with the flow arrow on
the body to assure lower opening torque and longer
service life. With non-metallic flanges, the BX2L4 or
BX2L9 series valve should be used.

7. The use of rubber or other similar “soft” gaskets is
NOT recommended, and should be avoided.

8. When standard lug style valves are installed for
end-of-line (dead-end) service, the retainer ring
must be supported by a mating pipe flange. For true
end-of-line service with retainer ring unsupported,
a BX2L4 or BX2L9 series valve must be used.

BX2L4 and BX2L9 end of line valves are derated to 150 PSI
maximum when installed without a mating flange supporting
the retainer ring.

9.

When BX2L4 or BX2L9 valves are used, check for
compatibility before using API 601 spiral wound
metallic gaskets.

10. Flange fasteners should be tightened and
torqued in a sequential criss-cross pattern as
recommended by the MSS SP-92 standard.

11. For recommended fastener sizes see the tables
at the end of this publication on page 34 and 35.

FIGURE 1
Mating Flange
Clearance Dimensions

TABLE B – Disc Projection

in 2 3 4 5 6 8 10 12 14 16 18 20 24 30 36

Size

(mm) (50) (80) (100) (125) (150) (200) (250) (300) (350) (400) (450) (500) (600) (750) (900)

A in 3/8

ASME

(mm) (10) (17) (29) (38) (52) (67) (92) (114) (127) (147) (162) (180) (211) (279) (346)

Class

150

B in 11/4 27/16 35/8 41/2 59/16 7 95/16 113/8 1245/64 1445/64 169/16 1815/32 2223/32 283/8 343/8

11

/16 11/8 11/2 21/16 25/8 35/8 41/2 5 525/32 63/8 73/32 85/16 11 1341/64

(mm) (32) (62) (92) (114) (141) (178) (237) (289) (323) (373) (420) (469) (561) (721) (873)

A in 3/8

ASME

(mm) (10) (17) (29) (52) (67) (92) (114) (105) (121) (137) (159)

Class

300

(mm) (32) (62) (92) (141) (178) (237) (273) (310) (358) (402) (438)

B in 11/4 27/16 35/8

11

/16 11/8

21/16 25/8 35/8 41/2 41/8 43/4 53/8 61/4

—

—

59/16 7 95/16 103/4 121/8 141/8 157/8 171/4

— — —

— — —

7

SECTION III

VALVE REMOVAL

DANGER – Immediate hazards which WILL result in severe

personal injury or death.

SECTION IV

SEAT REPLACEMENT

DURCO BX2001 USER INSTRUCTIONS ENGLISH 9-13

1. Refer to Safety Precautions Instructions on page 5 of this

manual.

2. Open the valve and bleed the line.

3. Close the valve.

4. Remove the valve from the line.

DISASSEMBLY

1. For repairs that require seat replacement only, it is not
necessary to remove manual operators.

2. Place the valve seat side up on a work table.

3. For valves that have retainer ring fasteners, remove the
fasteners and lift the retainer ring and seat package out
of the valve body.

4. For metal seated valves that use a wire retainer locking
ring, cut the wire where it is attached to the valve body.
Use pliers to pull the wire while also rotating the retainer
ring until the wire is pulled free. Lift the retainer ring and
seat out of the valve body.

5. For soft seated valves that use an O-ring retainer locking
ring, insert the flat blade of a screwdriver into the gap
between the back of the retainer ring and the valve body.
Twist the blade to pry the retainer ring out of the valve
body, then remove the seat package.

cLEAn up AnD prEpArAtIon

1. Remove the PFA seat and seat energizer from the seat
ring. Remove any gasket material from the seat ring and
clean thoroughly.

2. Remove any seat gasket material from the retainer ring
and the seat pocket of the valve body. Clean all surfaces
thoroughly. Discard retainer ring fasteners, wire or
O-ring retainer lock rings.

3. Carefully clean and inspect the sealing surface of the
valve disc. Small scratches, scale or minor corrosion can
be removed by polishing using 600 grit or finer emery
paper. DO NOT SAND OR BEAD BLAST DISC.

4. Metal seated valves use hard surface plating on the
valve disc to improve seal life. If the plating is damaged,
scratched or heavily worn, the disc should be replaced.

5. Under no circumstances should worn, corroded or
scratched valve discs be repaired by welding or
re-machining.

pFA SEAt pAckAgE prE-ASSEMBLY

1. Spread open the seat and insert the seat energizer
into the seat. Press the energizer firmly into the inside
of the seat.

2. Spread open the seat again and slip it over the seat ring,
working it around the circumference of the ring until the
seat ring is totally encapsulated by the seat.

8

SECTION IV

SEAT REPLACEMENT (continued)

DURCO BX2001 USER INSTRUCTIONS ENGLISH 9-13

SEAt pAckAgE InStALLAtIon – StAnDArD vALvE

1. Make certain the valve disc is fully closed and place the
seat package in the valve body seat pocket. For valves
with seat rings with an angled face, place the angled face
side of the seat down against the seat pocket in the valve
body.

2. For valves that use retainer ring fasteners, place the
retainer ring on the valve body and line up the fastener
holes. Using a press or “C” clamps, firmly press the
retainer ring onto the valve body to compress the seat
package. Insert and tighten the fasteners in a criss-cross
pattern to 180 in-lbs (20 Nm). Note: For end-of-line
BX2L4 or BX2L9 lug valves, tighten fasteners to
120 in-lbs (14 Nm).

3. For valves that use an O-ring retainer locking ring,
place the new O-ring into the outside groove of the
retainer ring. Apply a light coat of lubricant on the
O-ring and place the retainer ring on the body. Using a
press or “C” clamps, firmly press the retainer ring into
the valve body.

Retainer Ring

Retainer Ring
Locking O-Ring

Seat Ring

PFA Seat

Seat Energizer

Retainer Ring

Retainer Ring
Fastener

Seat Ring

PFA Seat

Seat Energizer

End of Line
BX2L4 and BX2L9

Retainer Ring

Retainer Ring
O-Ring

Retainer Ring
Fastener

Seat Ring

PFA Seat

Seat Energizer

Retainer Ring

Retainer Ring
Locking O-Ring

UHMWPE Seat

9

SECTION IV

SEAT REPLACEMENT (continued)

DURCO BX2001 USER INSTRUCTIONS ENGLISH 9-13

SEAt pAckAgE InStALLAtIon – FIrE SEALED vALvE

1. Make certain the valve disc is fully closed and place one
of the 3 graphite gaskets into the seat pocket of the
valve body. Note: If the repair kit contains one wide and
2 narrow gaskets, use the narrow gaskets first and use
the wide gaskets for Step 5.

2. Place the seat package in the valve body seat pocket.
For valves with seat rings with an angled face, place the
angled face side of the seat down against the seat pocket
in the valve body.

3. Place a second graphite gasket on the top of the seat
package, making certain it is centered so that it fits
around the outside diameter of the PFA seat.

4. Place the fire sealed metal seat on the package,
orientated so that the inside metal lip is facing away
from the valve disc. Make certain that the inside lip is
centered to the valve disc.

5. Some styles of retainer rings have a machined groove
for this gasket. For these styles, use a small amount
of adhesive and glue the gasket into the groove of the
retainer ring. For styles without the machined gasket
groove, place the third graphite gasket on top of the
fire sealed metal seat, making certain that it is centered
to the diameter of the seat.

6. For valves that use retainer ring fasteners, place the
retainer ring on the valve body and line up the fastener
holes. Using a press or “C” clamps, firmly press the
retainer ring onto the valve body to compress the seat
package. Insert and tighten the fasteners in a criss-cross
pattern to 180 in-lbs (20 Nm).

7. For valves that use an O-ring retainer locking ring, place
the new O-ring into the outside groove of the retainer
ring. Apply a light coat of lubricant on the O-ring and
place the retainer ring on the body. Using a press or “C”
clamps, firmly press the retainer ring into the valve body.

Retainer Ring

Retainer Ring
Locking O-Ring

Graphite
Gaskets

Seat Ring

PFA Seat

Fire Sealed
Metal Seat

Seat Energizer

Retainer Ring

Retainer Ring
Fastener

Graphite
Gaskets

Seat Ring

PFA Seat

Fire Sealed
Metal Seat

Seat Energizer

10

SECTION IV

SEAT REPLACEMENT (continued)

SEAt pAckAgE InStALLAtIon – ApEx cLASS Iv MEtAL
SEAtED vALvE

1. Make certain the valve disc is fully closed and place one
of the 3 graphite gaskets into the seat pocket of the
valve body. Note: If the repair kit contains one wide and
2 narrow gaskets, use the narrow gaskets first and use
the wide gaskets for Step 5.

2. Place the seat ring in the valve body seat pocket. For
valves with seat rings with an angled face, place the
angled face side of the seat down against the seat pocket
in the valve body.

3. Place a second graphite gasket on the top of the seat
package, making certain it is centered so that it fits into
the groove around the outside diameter of the seat ring.

4. Place the APEX metal seat on the seat package,
orientated so that the inside metal lip is facing away
from the valve disc. Make certain that the inside lip is
centered to the valve disc.

5. Some styles of retainer rings have a machined groove
for this gasket. For these styles, use a small amount
of adhesive and glue the gasket into the groove of the
retainer ring. For styles without the machined gasket
groove, place the third graphite gasket on top of the
APEX metal seat, making certain that it is centered to the
diameter of the seat.

6. For valves that use retainer ring fasteners, place the
retainer ring on the valve body and line up the fastener
holes. Using a press or “C” clamps, firmly press the
retainer ring onto the valve body to compress the seat
package. Insert and tighten the fasteners in a criss-cross
pattern to 180 in-lbs (20 Nm).

7. For valves that use an O-ring retainer locking ring, place
the new O-ring into the outside groove of the retainer
ring. Apply a light coat of lubricant on the O-ring and
place the retainer ring on the body. Using a press or “C”
clamps, firmly press the retainer ring into the valve body.

8. For valves that use a wire retainer locking ring, place the
retainer ring into the valve body seat pocket. Thread the
wire through the slot in the valve body and rotate the
retainer ring to pull the wire through the valve body until
both ends of the wire extend through the slot. Bend each
end of the wire back to lock the wire in place. Trim off
extra wire length and tack weld each to the valve body.

DURCO BX2001 USER INSTRUCTIONS ENGLISH 9-13

Design to
+400˚F (204˚C)
or Less

Retainer Ring

Retainer Ring
Locking O-Ring

Graphite
Gaskets

Seat Ring

APEX Class IV
Metal Seat

Design from
+400˚F (204˚C)
or More

Retainer Ring

Retainer Ring
Locking Wire

Graphite
Gaskets

Seat Ring

APEX Class IV
Metal Seat

Retainer Ring

Retainer Ring
Fastener

Graphite
Gaskets

Seat Ring

APEX Class IV
Metal Seat

11

SECTION IV

SEAT REPLACEMENT (continued)

SEAt pAckAgE InStALLAtIon – trIFLEx cLASS vI MEtAL
SEAtED vALvE

1. Make certain the valve disc is fully closed and place
the seat into the valve body with the rolled seal on the
outside of the seat facing up, away from the valve body
seat pocket.

2. For valves that use retainer ring fasteners, place the
retainer ring on the valve body and line up the fastener
holes. Using a press or “C” clamps, firmly press the
retainer ring onto the valve body to compress the seat
package. Insert and tighten the fasteners in a criss-cross
pattern to 180 in-lbs (20 Nm).

3. For valves that use a wire retainer locking ring, place the
retainer ring into the valve body seat pocket. Thread the
wire through the slot in the valve body and rotate the
retainer ring to pull the wire through the valve body until
both ends of the wire extend through the slot. Bend each
end of the wire back to lock the wire in place. Trim off
extra wire length and tack weld each to the valve body.

DURCO BX2001 USER INSTRUCTIONS ENGLISH 9-13

Retainer Ring

Retainer Ring
Locking Wire

Triflex Class VI
Metal Seat

Retainer Ring

Retainer Ring
Fastener

Triflex Class VI
Metal Seat

12

FInAL prEpArAtIon For InStALLAtIon – SEAt
rEpLAcEMEnt rEpAIr

1. Stem packing fasteners should be re-tightened to the
torque specifications listed on page 25 of this manual.
Make certain to identify the style of packing used in
the valve in order to select the proper fastener torque.
Packing styles are illustrated on page 25 of this manual.

2. If manual operators were removed, re-install them using
the procedures in Section VIII for gears or Section X
for levers.

3. Operate the valves a few times to insure that the valve
disc turns freely into and out of the seat. Seat testing or
repaired valves is recommended.

DURCO BX2001 USER INSTRUCTIONS ENGLISH 9-13

SECTION V

PARTS LIST 2" thru 12" – Standard, Fire Sealed and BX2L4/BX2L9 End of Line Valve

Item No. Description Qty. Carbon Steel Stainless Steel

1 Body 1 ASTM A216 Gr. WCB ASTM A351 Gr. CF-8M
2 Disc 1 ASTM A351 Gr. CF-8M ASTM A351 Gr. CF-8M
3 Shaft 1 ASTM A564 Type 630 17-4 SS ASTM A564 Type 630 17-4 SS
4 Pin 1 ASTM A564 Type 630 17-4 SS ASTM A564 Type 630 17-4 SS
5 Bearing * PTFE/Fiberglass (
6 Thrust Bearing 2 ASTM A564 Type 630 17-4 SS ASTM A564 Type 630 17-4 SS
7 Thrust Washer 1 1018 Steel 316 SS

 •8 PackingSet 1 PTFECupandCone(

9 Gland 1 303 SS 303 SS
10 Adjuster 1 ASTM A351 Gr. CD4MCu ASTM A351 Gr. CD4MCu
11 Stud-Adjuster 2 B8-M3 (
12 Nut-Adjuster 2 Gr. 8 (
13 Ground Spring 1 302 SS 302 SS
14 Retainer Ring 1 ASTM A515 Gr. 70 Carbon Steel ASTM A240 Type 316 SS

 •15 LockRing 1 VitonA** VitonA
 •16 Seat 1 PFA PFA
 •17 SeatEnergizer 1 VitonA** VitonA

18 Seat Ring 1 1020 Steel ASTM A240 Type 316 SS
19 Jamb Nut 1 300 Series SS 300 Series SS

 •20 Gasket-FireSeal 3
 •21 Seat-FireSeal 1

22 Capscrew As Req’d Chrome Steel Chrome Steel

 •33 Seat 1 UHMWPE UHMWPE

* For quantities of PTFE/Fiberglass bearings, see Table D on page 22. All Fire Sealed have 1 upper and 1 lower bearing.
** Registered trademark of the DuPont Company. ***Registered trademark of Union Carbide.

n

PTFE/316 SS) PTFE/Fiberglass (n PTFE/316 SS)

n

Grafoil) PTFE Cup and Cone (n Grafoil)

n

Gr. B-7) B8-M3 (n Gr. B-7)

n

Gr. 24) Gr. 8 (n Gr. 24)

n

Grafoil***

n

Inconel X750

n Materials for Fire Sealed valves only. • Recommended spare parts.

n

Inconel X750

n

Grafoil

Standard Valve

Fire Sealed Valve

Optional UHWMPE Seat

13

DURCO BX2001 USER INSTRUCTIONS ENGLISH 9-13

SECTION V

BX2L4/BX2L9
End Of Line Lug Valve

PARTS LIST 2" thru 12" – TriFlex Metal Seat

Item No. Description Qty. Carbon Steel Stainless Steel

1 Body 1 ASTM A216 Gr. WCB ASTM A351 Gr. CF-8M
2 Disc 1 ASTM A351 Gr. CF-8M (ENC) ASTM A351 Gr. CF-8M (ENC)

3 Shaft 1
ASTM A479 Type XM19 SS - above 600˚F ASTM A479 Type XM19 SS - above 600˚F

4 Pin 1
ASTM A479 Type XM19 SS - above 600˚F ASMT A479 Type XM19 SS - above 600˚F

5 Bearing
316 SS Chrome Plated above 400˚F 316 SS Chrome Plated above 400˚F

6 Thrust Bearing 2
ASTM A479 Type XM19 SS above 600˚F ASTM A479 Type XM19 SS above 600˚F

7 Thrust Washer 1
ASTM A479 Type XM19 SS above 600˚F ASTM A479 Type XM19 SS above 600˚F

8 Packing Set 1
Grafoil above 400˚F Grafoil above 400˚F

9 Gland 1 303 SS 303 SS
10 Adjuster 1 ASTM A351 Gr. CD4MCu ASTM A351 Gr. CD4MCu
11 Stud-Adjuster 2
12 Nut-Adjuster 2
13 Ground Spring 1 302 SS 302 SS
14 Retainer Ring 1 ASTM A515 Gr. 70 Carbon Steel ASTM A240 Type 316 SS
15 Lock Ring 1 Inconel Inconel
16 Seat 1 Inconel X750 Std. - Others as specified Inconel X750 Std. - Others as specified
19 Jamb Nut 1 300 Series SS 300 Series SS

*For quantities of PTFE/Fiberglass bearings, see Table D on page 22.

ASTM A564 Type 630 17-4 SS to 600˚F ASTM A564 Type 630 17-4 SS to 600˚F

ASTM A564 Type 630 17-4 SS to 600˚F ASTM A564 Type 630 17-4 SS to 600˚F

PTFE/Fiberglass - to 400˚F PTFE/Fiberglass - to 400˚F

*

ASTM Type 630 17-4 SS to 600˚F ASTM Type 630 17-4 SS to 600˚F

ASTM Type 630 17-4 SS to 600˚F ASTM Type 630 17-4 SS to 600˚F

PTFE Cup and Cone to 400˚F PTFE Cup and Cone to 400˚F

B8M3 to 400˚F — Gr. B-7 above 400˚F

Gr.8 to 400˚F — Gr. 2H above 400˚F

B8M3 to 400˚F — Gr. B-7 above 400˚F

Gr.8 to 400˚F — Gr. 2H above 400˚F

TriFlex Valve

14

DURCO BX2001 USER INSTRUCTIONS ENGLISH 9-13

SECTION V

PARTS LIST 2" thru 12" – APEX Metal Seat

Apex

Item No. Description Qty. Carbon Steel Stainless Steel

1 Body 1 ASTM A216 Gr. WCB ASTM A351 Gr. CF-8M
2 Disc 1 ASTM A351 Gr. CF-8M (ENC) ASTM A351 Gr. CF-8M (ENC)
3 Shaft 1 ASTM A564 Type 630 17-4 SS ASTM A564 Type 630 17-4 SS
4 Pin 1 ASTM A564 Type 630 17-4 SS ASTM A564 Type 630 17-4 SS

5 Bearing

6 Thrust Bearing

7 Thrust Washer

8 Packing Set 1

Grafoil*** above 400˚F Grafoil*** above 400˚F
9 Gland 1 303 SS 303 SS
10 Adjuster 1 ASTM A351 Gr. CD4MCu ASTM A351 Gr. CD4MCu
11 Stud-Adjuster 2 B8M3 to 400˚F — Gr. B-7 above 400˚F B8M3 to 400˚F — Gr. B-7 above 400˚F
12 Nut-Adjuster 2 Gr.8 to 400˚F — Gr. 2H above 400˚F Gr.8 to 400˚F — Gr. 2H above 400˚F
13 Ground Spring 1 302 SS 302 SS
14 Retainer Ring 1 ASTM A515 Gr. 70 Carbon Steel ASTM A240 Type 316 SS

 •15 LockRing 1 VitonA**to400˚F—Inconelabove400˚F VitonA**to400˚F—Inconelabove400˚F
 •16 Seat 1 InconelX750-Othersasspecified InconelX750-Othersasspecified
 •17 Gasket 3 Grafoil*** Grafoil***

18 Seat Ring 1
19 Jamb Nut 1 300 Series SS 300 Series SS

* For quantities of PTFE/Fiberglass bearings, see Table D on page 22. ** Registered trademark of the DuPont Company.
*** Registered trademark of Union Carbide.

*

2

1

PTFE Cup and Cone to 400 Deg. F PTFE Cup and Cone to 400 Deg. F

PTFE/Fiberglass to 400˚F

316 SS Chrome Plated above 400˚F 316 SS Chrome Plated above 400˚F

ASTM Type 630 17-4 SS to 600˚F

ASTM A479 Type XM19 SS above 600˚F ASTM A479 Type XM19 SS above 600˚F

ASTM Type 630 17-4 SS to 600˚F

ASTM A479 Type XM19 SS above 600˚F ASTM A479 Type XM19 SS above 600˚F

ASTM A515 Gr. 70 Carbon Steel

PTFE/Fiberglass to 400˚F

ASTM Type 630 17-4 SS to 600˚F

ASTM Type 630 17-4 SS to 600˚F

ASTM A240 Type 316 SS

• Recommended spare parts.

APEX Valve

15

DURCO BX2001 USER INSTRUCTIONS ENGLISH 9-13

SECTION V

PARTS LIST 14" thru 36" – Standard and Fire Sealed

Item No. Description Qty. Carbon Steel Stainless Steel

1 Body 1 ASTM A216 Gr. WCB ASTM A351 Gr. CF8M
2 Disc 1 ASTM A351 Gr. CF8M ASTM A351 Gr. CF8M
2A Taper Pin As Req. ASTM A276 Type 316 Condition B ASTM A276 Type 316 Condition B
2B Shaft 1 ASTM A564 UNS S17400 Type 630 ASTM A564 UNS S17400 Type 630

 •3 PackingSet AsReq. PTFE(

4 Packing Gland As Req. 300 Series Stainless Steel 300 Series Stainless Steel

Thrust Washer

5

6 Packing Washer As Req. Carbon Steel 316 Stainless Steel
7 Bearing 2 PTFE/Fiberglass (
8 Adjuster Fastener As Req. B8M3 (
9 Adjuster As Req. ASTM A351 Gr. CD4M-Cu ASTM A351 Gr. CD4M-Cu
10 Grounding Spring 1 300 Series Stainless Steel 300 Series Stainless Steel
11 Retainer Ring 1 ASTM A516 Gr. 70 ASTM A240 UNS S31600 Type 316
12 Seat Ring 1 Carbon Steel ASTM A240 UNS S31600 Type 316

 •13 SeatEnergizer 1 VitonA* VitonA*
 •14 Seat 1 PFA PFA
 •15 RetainerFastener AsReq. 300SeriesStainlessSteel 300SeriesStainlessSteel
 •16 Fire-SealedSeat 1 InconelX750 InconelX750
 •17 RetainerGasket 1
 •18 SeatGasket 2

19 Jamb Nut 4 300 Series Stainless Steel 300 Series Stainless Steel
20 Thrust Bearing 2 PTFE PTFE
21 Thrust Washer 2 300 Series Stainless Steel 300 Series Stainless Steel
22 Adjustment Stud 1 Carbon Steel - Zinc Plated 304 Stainless Steel
23 Support Stud 4 Carbon Steel - Zinc Plated 304 Stainless Steel
24 Lock Washer 4 Carbon Steel 300 Series Stainless Steel
25 Nut 4 Carbon Steel 300 Series Stainless Steel
26 Thrust Plate 1 Carbon Steel - Zinc Plated 304 Stainless Steel
31 Bottom Cap 1 ASTM A516 Gr. 70 ASTM A240 UNS S31600 Type 316
32 Bottom Cap Gasket 1 TFM 1600 (
33 Bottom Cap Fastener 6 B8M3 (
34 Bearing Cap 1 ASTM A240 UNS S31600 Type 316 ASTM A240 UNS S31600 Type 316
35 Bearing Cap Fastener 2 B8M3 B8M3
36 Thrust Bearing 2 TFM 1600 TFM 1600

14", 16" & 18" only

2

n

Grafoil)** PTFE (nGrafoil)**

PTFE PTFE

n

PTFE/316 SS) PTFE/Fiberglass (nPTFE/316 SS)

n

Gr. B-7) B8M3 (nGr. B-7)

n

Grafoil**

n

Grafoil**

n

Grafoil**) TFM 1600 (nGrafoil**)

n

Gr. B-7) B8M3 (nGr. B-7)

n

Grafoil**

n

Grafoil**

nMaterials for Fire Sealed valves only •Recommended spare parts

* Registered trademark of DuPont Company ** Registered trademark of Union Carbide

16

SECTION V

PARTS LIST 14" thru 36"

(See Parts List on page 16.)

Standard Valve

DURCO BX2001 USER INSTRUCTIONS ENGLISH 9-13

34

35

32

For 20 in Cl 300 only

Fire Sealed Valve

36

34

35

32

For 20 in Cl 300 only

31

33

36

31

33

For 20, 24, 30, 36 in only

For 20, 24, 30, 36 in only

17

DURCO BX2001 USER INSTRUCTIONS ENGLISH 9-13

SECTION V

PARTS LIST 14" thru 36" – APEX Class IV Metal Seat

Item No. Description Qty. Carbon Steel Stainless Steel

1 Body 1 ASTM A216 Gr. WCB ASTM A351 Gr. CF8M
2 Disc 1 ASTM A351 Gr. CF8M ENC ASTM A351 Gr. CF8M
2A Taper Pin As Req. ASTM A276 Type 316 Condition B ASTM A276 Type 316 Condition B
2B Shaft 1 ASTM A564 UNS S17400 Type 630 ASTM A564 UNS S17400 Type 630

 •3 PackingSet AsReq. PTFEto400˚F—Grafoil**above400˚F PTFEto400˚F—Grafoil**above400˚F

4 Packing Gland As Req. 300 Series Stainless Steel 300 Series Stainless Steel

Thrust Washer

5

6 Packing Washer As Req. Carbon Steel 316 Stainless Steel
7 Bearing 2 PTFE/Fiberglass to 400˚F PTFE/Fiberglass to 400˚F

8 Adjuster Fastener As Req. B8M3 to 400˚F — Gr. B-7 above 400˚F B8M3 to 400˚F — Gr. B-7 above 400˚F
9 Adjuster As Req. ASTM A351 Gr. CD4M-Cu ASTM A351 Gr. CD4M-Cu
10 Grounding Spring 1 300 Series Stainless Steel 300 Series Stainless Steel
11 Retainer Ring 1 ASTM A515 Gr. 70 ASTM A240 UNS S31600 Type 316
12 Seat Ring 1 ASTM A516 Gr. 70 ASTM A240 UNS S31600 Type 316

 •14 APEXSeat 1 InconelX750Std.—Othersasspecified InconelX750Std.—Othersasspecified
 •15 RetainerFastener AsReq. 300SeriesStainlessSteel 300SeriesStainlessSteel
 •17 RetainerGasket 1 Grafoil** Grafoil**
 •18 SeatGasket 2 Grafoil** Grafoil**

19 Jamb Nut 4 300 Series Stainless Steel 300 Series Stainless Steel
20 Thrust Bearing 2 PTFE PTFE
21 Thrust Washer 2 300 Series Stainless Steel 300 Series Stainless Steel
22 Adjustment Stud 1 Carbon Steel - Zinc Plated 304 Stainless Steel
23 Support Stud 4 Carbon Steel - Zinc Plated 304 Stainless Steel
24 Lock Washer 4 Carbon Steel 300 Series Stainless Steel
25 Nut 4 Carbon Steel 300 Series Stainless Steel
26 Thrust Plate 1 Carbon Steel - Zinc Plated 304 Stainless Steel
31 Bottom Cap 1 ASTM A516 Gr. 70 ASTM A240 UNS S31600 Type 316
32 Bottom Cap Gasket 1 TFM 1600 to 400˚F — Grafoil** above 400˚F TFM 1600 to 400˚F — Grafoil** above 400˚F
33 Bottom Cap Fastener 6 B8M3 to 400˚F — B7 above 400˚F B8M3 to 400˚F — B7 above 400˚F
34 Bearing Cap 1 ASTM A240 UNS S31600 Type 316 ASTM A240 UNS S31600 Type 316
35 Bearing Cap Fastener 2 B8M3 B8M3
36 Thrust Bearing 2 TFM 1600 to 400˚F — Grafoil** above 400˚F TFM 1600 to 400˚F — Grafoil** above 400˚F

14", 16" & 18" only

•Recommended spare parts * Registered trademark of DuPont Company ** Registered trademark of Union Carbide

2

PTFE to 400˚F — Grafoil** above 400˚F PTFE to 400˚F — Grafoil** above 400˚F

316 SS Chrome Plated above 400˚F 316 SS Chrome Plated above 400˚F

APEX Valve

18

34

35

32

For 20 in Cl 300 only

18

12

18

16

17

36

31

33

For 20, 24, 30, 36 in only

DURCO BX2001 USER INSTRUCTIONS ENGLISH 9-13

SECTION V

PARTS LIST 14" thru 36" – TriFlex Class VI Metal Seat

Item No. Description Qty. Carbon Steel Stainless Steel

1 Body 1 ASTM A216 Gr. WCB ASTM A351 Gr. CF8M
2 Disc 1 ASTM A351 Gr. CF8M ENC ASTM A351 Gr. CF8M ENC

2A Taper Pin As Req.

Monel K-500 above 600˚F Monel K-500 above 600˚F
2B Shaft 1 ASTM A564 UNS S17400 Type 630 to 600˚F ASTM A564 UNS S17400 Type 630 to 600˚F
ASTM A479 Type XM-19 above 600˚F ASTM A479 Type XM-19 above 600˚F

 •3 PackingSet AsReq. PTFEto400˚F—Grafoil**above400˚F PTFEto400˚F—Grafoil**above400˚F

4 Packing Gland As Req. 300 Series Stainless Steel 300 Series Stainless Steel
5 Thrust Washer

6 Packing Washer As Req. Carbon Steel 316 Stainless Steel

7 Bearing 2

8 Adjuster Fastener As Req. B8M3 to 400˚F — Gr. B-7 above 400˚F B8M3 to 400˚F — Gr. B-7 above 400˚F
9 Adjuster As Req. ASTM A351 Gr. CD4M-Cu ASTM A351 Gr. CD4M-Cu
10 Grounding Spring 1 300 Series Stainless Steel 300 Series Stainless Steel
11 Retainer Ring 1 ASTM A516 Gr. 70 ASTM A240 UNS S31600 Type 316

 •14 TriflexSeat 1 InconelX750Std.—Othersasspecified InconelX750Std.—Othersasspecified
 •15 RetainerFastener AsReq. 300SeriesStainlessSteel 300SeriesStainlessSteel

19 Jamb Nut 4 300 Series Stainless Steel 300 Series Stainless Steel
20 Thrust Bearing 2 PTFE PTFE
21 Thrust Washer 2 300 Series Stainless Steel 300 Series Stainless Steel
22 Adjustment Stud 1 Carbon Steel - Zinc Plated 304 Stainless Steel
23 Support Stud 4 Carbon Steel - Zinc Plated 304 Stainless Steel
24 Lock Washer 4 Carbon Steel 300 Series Stainless Steel
25 Nut 4 Carbon Steel 300 Series Stainless Steel
26 Thrust Plate 1 Carbon Steel - Zinc Plated 304 Stainless Steel
31 Bottom Cap 1 ASTM A516 Gr. 70 ASTM A240 UNS S31600 Type 316
32 Bottom Cap Gasket 1 TFM 1600 to 400˚F — Grafoil** above 400˚F TFM 1600 to 400˚F — Grafoil** above 400˚F
33 Bottom Cap Fastener 6 B8M3 to 400˚F — B7 above 400˚F B8M3 to 400˚F — B7 above 400˚F
34 Bearing Cap 1 ASTM A240 UNS S31600 Type 316 ASTM A240 UNS S31600 Type 316
35 Bearing Cap Fastener 2 B8M3 B8M3
36 Thrust Bearing 2 TFM 1600 to 400˚F — Grafoil** above 400˚F TFM 1600 to 400˚F — Grafoil** above 400˚F

14", 16" & 18" only

•Recommended spare parts * Registered trademark of DuPont Company ** Registered trademark of Union Carbide

ASTM A276 Type 316 Condition B to 600˚F ASTM A276 Type 316 Condition B to 600˚F

2

PTFE/Fiberglass to 400˚F PTFE/Fiberglass to 400˚F

PTFE to 400˚F — Grafoil** above 400˚F PTFE to 400˚F — Grafoil** above 400˚F

316 SS Chrome Plated above 400˚F 316 SS Chrome Plated above 400˚F

TriFlex Valve

34

35

32

For 20 in Cl 300 only

14

36

31

33

For 20, 24, 30, 36 in only

19

DURCO BX2001 USER INSTRUCTIONS ENGLISH 9-13

SECTION VI

SERVICE KITS

Service kits are offered in Table C. Seat kits include all
components necessary for seat replacement. Complete kits
include the seat kit plus other components required for
complete valve repair. When ordering, indicate size, model
number, pressure class and material of construction
(as detailed on valve nameplate) for the valve to be repaired.

TABLE C – Service Kits

BX2001 ASME Class 150 Repair Kits BX2301 ASME Class 300 Repair Kits
SX = Standard BX2001 Seat Kit SX3 = Standard BX2301 Seat Kit

CX = Standard BX2001 Complete Kit CX3 = Standard BX2301 Complete Kit
SL = Std. BX2 End of Line Lug Seat Kit SL3 = Std. BX2301 End of Line Lug Seat Kit
CL = Std. BX2 End of Line Lug Complete Kit CL3 = Std. BX2301 End of Line Lug Complete Kit
SU = UHWMPE BX2001 Seat Kit SU3 = UHWMPE BX2301 Seat Kit
CU = UHWMPE BX2001 Complete Kit CU3 = UHWMPE BX2301 Complete Kit
SZ = Fire Sealed BX2001 Seat Kit SZ3 = Fire Sealed BX2301 Seat Kit
CZ = Fire Sealed BX2001 Complete Kit CZ3 = Fire Sealed BX2301 Complete Kit
ST = TriFlex BX2001 Seat Kit (Inconel Seat) ST3 = TriFlex BX2301 Seat Kit (Inconel Seat)
CT = TriFlex BX2001 Complete Kit (Inconel Seat) CT3 = TriFlex BX2301 Complete Kit (Inconel Seat)
S4 = APEX BX2001 Seat Kit (Inconel Seat) S43 = APEX BX2301 Seat Kit (Inconel Seat)
C4 = APEX BX2001 Complete Kit (Inconel Seat) C43 = APEX BX2301 Complete Kit (Inconel Seat)

IMPORTANT NOTE

The use of parts and components other than those
supplied by Flowserve Corporation could severely
restrict the operation and performance of this valve.
Unauthorized or sub stitutions of components can lead
to valve failure due to corrosion and/or premature failure
of the substituted parts.

Valve Type Seat Kit Components Complete Kit components
Standard, End of Line

Lug, UHMWPE

Fire Sealed

Fire Sealed seat, Grafoil retainer and seat gaskets
Triflex TriFlex seat, retainer fasteners or locking ring Seat kit, packing, bearings, disc pins, thrust washers

APEX

Grafoil retainer and seat gaskets

PFA seat, seat energizer, retainer fasteners or locking ring,

APEX seat, retainer fasteners or locking rings,

PFA seat, seat energizer, retainer fasteners or locking ring Seat kit, packing, bearings, disc pins, thrust washers

Seat kit, packing, bearings, disc pins, thrust washers

Seat kit, packing, bearings, disc pins, thrust washers

20

SECTION VII

COMPLETE VALVE REPAIR

DISASSEMBLY

1. Place the valve seat side up on a work table and remove
manual operators.

2. Remove seat package following the procedure for seat
replacement in Section IV.

3. Remove packing bolts or nuts, adjuster and gland.
Remove external disc support hardware or bottom cap.

4. Grind away weld from end of disc pin and drive out pins
using a punch and hammer. Discard pins.

5. Carefully pull or push shaft through the disc and out of the
valve body.

6.

Remove packing and bearings from valve body and discard.

DURCO BX2001 USER INSTRUCTIONS ENGLISH 9-13

cLEAn up AnD prEpArAtIon

1. Clean and inspect seat components and valve disc, follow­ing the procedure for seat replacement in Section IV.

2. Remove any gasket material from the seat pocket,
packing box and shaft bore of the valve body. Clean all
surfaces thoroughly. Polish the valve body packing and
stem bores, the disc shaft bore and the shaft using
600 grit or finer emery paper.

Do not sandblast the valve body, disc or shaft.

3. Carefully inspect all machined bores and surfaces. Small
scratches, scale or minor corrosion can be removed by
polishing using 600 grit or finer emery paper. Under
no circumstances should heavily worn, corroded or
scratched valve bodies, discs or shafts be repaired by
welding or re-machining.

vALvE ASSEMBLY — 2" thru 12"

1. Clamp the valve body in a vice and insert the bearing(s)
into the bottom (blind) shaft bore. For PTFE/fiberglass
bearings, insert the bearing stack as shown in Table D.
For severe service, fire sealed and metal bearings, insert
the short bearing into the bottom shaft bore. Note: Severe
service and fire sealed bearings are split. Align the split
towards one side of the valve.

3. Insert the top bearing(s) into the top shaft bore of the
valve body. For PTFE/fiberglass bearings, insert the bear­ing stack as shown in Table D. For severe service, fire
sealed and metal bearings, insert the long bearing into
the top shaft bore. Note: Severe service and fire sealed
bearings are split. Align the split of the top bearing in the
opposite direction of the bottom bearing.

4. Slide the shaft through the top bearing and disc and into
the bottom shaft bore. When fully inserted, the disc pin
slot of the disc and shaft will be aligned.

2. Place one disc thrust washer over the bearing and then
place the disc (disc pin slot up toward the top end of the
valve body) into the valve body, aligning the disc and body
shaft bores. Slide the second disc thrust washer into the
gap between the top of the disc and valve body.

21

SECTION VII

COMPLETE VALVE REPAIR (continued)

DURCO BX2001 USER INSTRUCTIONS ENGLISH 9-13

5. Insert the disc pin (thin end first) into the slot between
the disc shaft. When the pin is installed in the proper
orientation, the thick end of the pin will be adjacent to
the small drilled hole in the slot of the disc (adjacent
to the original pin weld). Also check alignment of
shaft double D to the disc face. The flat of the double
D should be parallel to the front face of the disc.
Improper orientation of disc pin will cause the shaft
flat and disc face to be off parallel by several degrees.

12. Operate the valves a few times to insure that the valve
disc turns freely into and out of the seat. Seat testing
of repaired valves is recommended.

TABLE D – PTFE/Fiberglass Bearings

Valve Pressure Bottom Bearing Top Bearing
Size Class Qty. Length (in) Qty. Length (in)
2 150/300 1 0.81 2 1.00

3 150/300 1 1.00 2 1.00
4 150/300 1 1.00 2 1.00
6 150/300 1 1.00 2 1.00

8 150 1 1.50

1.50

8 300 2 1.00 2 1.50
10 150 2 1.00 3 1.00

10 300 1

1.50 1 1.50

12 150 2 1.13 3 1.13

12 300 2

1 1.00

PACKING

ADJUSTER

1.00 2 1.00

2 1.50

1.50

1.00

1

6. Using a punch and hammer on the thick end of the pin,
firmly set the pin. Check disc and shaft connection to
ensure there is no looseness.

7. Weld the thick end of the pin to the disc. Draw weld
into the small drilled hole in the pin slot of the disc to
act as a secondary mechanical lock. Be certain to use
weld rod compatible with pin and disc materials and
service environment.

8. Insert packing thrust washer, packing set and packing
gland into the packing bore of the valve body. Slide
the grounding spring over the shaft. Install packing
adjuster and adjuster nuts.

9. Tighten adjuster nuts to the torque specifications listed
on page 25 of this manual. Make certain to identify
the style of packing used in the valve in order to select
the proper fastener torque.

Note: Packing styles are

illustrated on page 25.

10. Install the seat package following the procedure for
seat replacement in Section IV.

11. If manual operators were removed, re-install
them using procedures in Section VIII for gears or

Section X

for levers.

GROUND

SPRING

PACKING

GLAND

STEM

PACKING

PACKING

THRUST

WASHER

STEM

BEARINGS

DISC

THRUST

BEARING

DISC

PIN

22

SECTION VII

DURCO BX2001 USER INSTRUCTIONS ENGLISH 9-13

COMPLETE VALVE REPAIR (continued)

vALvE ASSEMBLY — 14" thru 36"

1. Lay the valve body on the table with the seat pocket side
down. Insert a bearing into the top and bottom shaft
bore. Some designs of fire sealed bearings require a
separate metal outer sleeve (included in the repair kit).
Insert the PTFE/stainless bearing into the metal sleeve
prior to installing the bearing into the shaft bore. Note:
Severe service and fire sealed bearings are split. Align
the splits towards opposite sides of the valve.

2. Insert packing thrust washer, packing set and packing
gland into the top packing bore of the valve body. Install
packing adjuster and fasteners. Finger-tighten the
fasteners. These fasteners will be tightened to the
required torque after the shaft is installed. Do not install
the bottom packing set. It is installed after the shaft.

3. Place the disc face down into the valve body with the disc
pin holes towards the top of the body. Align the shaft
bores of the disc and valve body. Very close alignment
of the bores is required to insert the shaft.

4. Carefully slide the shaft through the bottom shaft bore
(the end without the stem packing installed) of the valve
body and into the disc bore.

FIGURE 2
Stepped Shaft Design

ADJUSTER

GROUND
SPRING

PACKING
GLAND

STEM
PACKING

PACKING
THRUST WASHER

SHAFT
THRUST WASHER

SHAFT
BEARING

Do not use excessive force to push the shaft through the disc
or galling may occur.

Note: For valves with a stepped shaft design, place the
shaft thrust washer over the top end of the shaft before
the shaft enters into the top shaft bore of the body.

5. Push the shaft through the body until the tapered disc pin
holes in the disc and shaft are aligned.

6. Verify that the orientation of the shaft is such that the
taper direction of the pin holes in the shaft matches the
taper direction of the pin holes in the disc. When properly
orientated, the tapered holes will match perfectly and
the word “DISC”, stamped on the shaft below the shaft
square, will be located on the same side as the front face
of the disc (the seat pocket side of the valve body).

7. Insert the tapered disc pins and firmly set each pin using
a punch and hammer. Check disc and shaft connection to
ensure there is no looseness.

8. Weld the small end of each pin to the disc. Be certain to
use weld rod compatible with pin and disc materials and
service environment.

9.

For valves with bottom stem packing, insert packing thrust

washer, packing set and packing gland into the bottom pack-

ing bore of the valve body. Install packing adjuster and fas­teners. Finger-tighten the fasteners. Note: For valves with a
stepped shaft design, insert the shaft thrust washer into the
packing bore prior to installing the packing thrust washer.

TAPER PIN

10. For valves with bottom end cap design, slide one thrust
bearing onto the shaft, attach the bearing cap to the end
of the shaft (use thread cement and torque fasteners to
30 ft-lbs). Place the second thrust bearing on the bearing
cap. Place the bottom cap gasket on the bottom cap and
install the bottom cap. Torque bottom cap fasteners to
75 ft-lbs in a criss-cross pattern.

FIGURE 3
Bottom Cap Design

SHAFT

BEARING

CAP

BEARING CAP

FASTENER

THRUST

BEARING

BOTTOM

CAP

LOCK

WASHER

SHAFT
BEARING

THRUST
WASHER

THRUST
BEARING

BOTTOM CAP
GASKET

BOTTOM CAP
FASTENER

23

SECTION VII

PACKING

ADJUSTER

PACKING

GLAND

GROUND

SPRING

STEM

PACKING

PACKING

THRUST

WASHER

STEM

BEARINGS

DISC

THRUST

BEARING

DISC

PIN

DURCO BX2001 USER INSTRUCTIONS ENGLISH 9-13

COMPLETE VALVE REPAIR (continued)

11. Turn valve over so that the valve body seat pocket is
up and level the disc face to the valve body.

12. Remove the top adjuster and slide the grounding
spring over the shaft. Replace the adjuster and tighten
the adjuster bolts to the torque specifications listed
on page 25 of this manual. For valves that have top
and bottom stem packing, the tightening of adjuster
fasteners can push the disc assembly off-center to the
valve body seat pocket. Alternate fastener tightening
between top and bottom packing to keep disc centered
in the valve body. Check the gap between the disc and
the valve body seat pocket. The maximum acceptable
gap difference (measured at the top and bottom of
the disc) is .015". Make certain to identify the style of
packing used in the valve in order to select the proper
fastener torque. Note: Packing styles are illustrated
on page 25.

MEASURE

GAP

HERE

TO CENTER

DISC IN

BODY

GAP

SHOULD

BE

EQUAL

TOP
AND

BOTTOM

(e)

Slide the remaining PTFE washer followed by the metal

washer (cup side facing the PTFE washer) over the adjust­ment stud and thread the two jamb nuts onto the stud.

(f) Finger tighten the jamb nut adjacent to the metal thrust

washer on each side of the thrust plate and check for
acceptable centering of the disc in the valve body by
measuring the gap as explained in Step 12. If the disc is
off center, then adjust the position by turning either nut
to pull or push the disc into position.

(g) Once the disc is centered, simultaneously tighten the two

inside jamb nuts to 40 ft-lbs.

(h) Tighten the outside jamb nuts to 200 ft-lbs. Make certain

that the inside jamb nuts do not turn while tightening the
outside nuts. Check for acceptable disc centering.

(i) Tack weld the adjustment stud to the valve shaft and out-

side jamb nuts to the adjustment stud.

FIGURE 4
External Disc Support Design

SHAFT BEARING

ADJUSTMENT

STUD

THRUST

BEARING

SHAFT

JAMB
NUTS

THRUST
WASHER

PACKING
THRUST WASHER

STEM PACKING

ADJUSTER BOLT

PACKING GLAND

PACKING ADJUSTER

SUPPORT STUD

THRUST PLATE

LOCK WASHER

NUT

13. For valves with an external disc support design,
assemble the disc support hardware on the bottom of
the valve body. See Figure 4.

(a) Thread the four support studs into the tapped holes on

the end of the body.

(b) Apply thread cement and thread the ajustment stud into

the shaft until it bottoms in the tapped hole and torque to
100 ft-lbs.

(c) Thread two jamb nuts onto the adjustment stud and slide

one metal thrust washer (cup side away from nuts) and
one PTFE thrust washer over the adjustment stud.

(d) Fasten the thrust plate to the support studs with four lock

washers and nuts.

24

14. Install the seat package following the procedure for
seat replacement in Section IV.

15. If manual operators were removed, re-install them
using the procedures in Section VIII for gears or
Section X for levers.

16. Operate the valves a few times to insure that the valve
disc turns freely into and out of the seat. Seat testing
of repaired valves is recommended.

DURCO BX2001 USER INSTRUCTIONS ENGLISH 9-13

SECTION VII

COMPLETE VALVE REPAIR (continued)

Single PTFE Cup and Cone Double PTFE Cup and Cone Triple Seal PTFE Cup and Cone

Belleville
Washers
(Optional)

Gland

Packing

Thrust
Washer

Belleville
Washers
(Optional)

Gland

Packing

Lantern Ring

Packing

Thrust

O-Ring

Top Plate

Belleville
Washers

Gland

Packing

Thrust
Washer

Washer

Adjuster Fastener Torque — PTFE Cup and Cone Packing

Valve Size 2 3 4 5 6 8 10 12 14 16 18 20 24 30 36

Fastener Torque – 150

(Nm) (17) (17) (20) (31) (31) (47) (55) (61) (47) (54) (61) (47) (54) (61) (87)

Fastener Torque – 300

(Nm) (17) (17) (20) — (31) (47) (61) (68) (47) (54) (61) (54) — — —

Adjuster Bolts
Belleville Washer

Ft-lbs. 13 13 15 23 23 35 41 45 35 40 45 35 40 45 65

Ft-lbs. 13 13 15 — 23 35 45 50 35 40 45 40 — — —

Triple Seal Belleville
Washer Arrangement

Arrangement

Single Fire Sealed Grafoil

Gland

Bull Ring

Die-Formed
Graphite Rings

Bull Ring

Thrust

Double Fire Sealed Grafoil

Gland

Packing Set

Lantern Ring

Packing Set

Thrust
Washer

Washer

Adjuster Fastener Torque — Fire Sealed Grafoil Packing

Valve Size 2 3 4 5 6 8 10 12 14 16 18 20 24 30 36

Fastener Torque – 150

(Nm) (11) (11) (11) (19) (19) (27) (37) (41) (40) (47) (54) (40) (47) (54) (80)

Fastener Torque – 300

(Nm) (11) (11) (11) — (19) (27) (41) (54) (40) (47) (54) (47) — — —

Ft-lbs. 8 8 8 14 14 20 28 31 30 35 40 30 35 40 60

Ft-lbs. 8 8 8 — 14 20 31 40 30 35 40 35 — — —

25

SECTION VIII

DURCO BX2001 USER INSTRUCTIONS ENGLISH 9-13

MANUAL GEAR OPERATOR INSTALLATION

1. Close the valve. The flats on top of the stem should be
parallel with the valve flange face. (Refer to FIGURE

6.) Note: At this time, adjustments should be made to
ensure that the body’s machined flanged surface (6) is
parallel with the disc. To accomplish this, place the valve
body’s machined flange surface (6) on a level plate.
Position a bubble level on the upper side of the shaft flat
and adjust the shaft until completely level.

When placing the valve into the vice, grip the bottom of the
valve only. Do not grip the bottom edge of the retainer ring,
this can damage the retainer ring/gasket sealing surface. Refer
to FigurE 5. Note: Vice should have soft jaws.

FIGURE 5

(See FIGURE 5 and FIGURE 6 below.)

3. Rotate the gearbox handwheel (1) clockwise until the
gearbox pointer (2) indicates the “shut” position.

4. Place the gearbox on the bracket (7) as shown in
FIGURE 6.

5. Loosen the gearbox stopping screws (3) and (9).

6. Install the gearbox fasteners (4) and lock washers and
tighten. Bracket fasteners (8) must also be tightened.

7. Turn the gearbox closing stop screw (9) clockwise until
it stops, then tighten the locknut (10).

8. Turn the gearbox handwheel (1) counterclockwise to
open the valve until the disc face is perpendicular to the
valve body flange face.

9. Turn the gearbox opening stop screw (3) clockwise until
it stops, then tighten the locknut (5).

10. Cycle the valve from closed to open to closed again
using the gear operator. Recheck to make sure the disc
is centered on the seat by measuring the distance from
the machined surface on the disc to the machine flanged
surface (6) on the body. This should be done at two
points, one above or below the disc over travel stop and
the other 180 degrees from the first. Both measurements
should be equal.

FIGURE 6

Recommended method
but not recommended

2. Place bracket (7) on the valve body as shown in FIGURE 6.
Attach using the brackets fasteners (8), lock washers
and hex nuts, making the fasteners finger-tight.

Alternate method acceptable

SECTION IX

CHANGING MANUAL GEAR OPERATOR QUADRANTS

Do not attempt to change the manual gear operator
quadrant while the valve is in service.

1. Close the valve. The flats on top of the stem should be
parallel with the valve flange face. Depressurize system

26

if valve is installed as valve could open when the manual
gear operator is removed.

2. Remove manual gear operator.

3. Remount gear operator 180 degrees from the position
shown in FIGURE 6.

4. Follow Steps 5 through 9 of the Manual Gear Operator
Installation instructions above.

SECTION X

DURCO BX2001 USER INSTRUCTIONS ENGLISH 9-13

LOCKING LEVER HANDLE AND INDICATOR PLATE INSTALLATION

1. Close the valve. The flats on top of the stem should be
parallel with the valve flange face. (Refer to FIGURE 7.)
Note: At this time, adjustments should be made to
ensure that the valve body’s machined flanged surface
(5) is parallel with the disc. To accomplish this, place the
valve body’s machined flanged surface (5) on a level
plate. Position a bubble level on the upper side of the
shaft flat and adjust the shaft until completely level.

2. Place bracket (6) on the valve body as shown in FIGURE

7. Attach using the bracket fasteners (7), lock washers
and hex fasteners. Secure hex fasteners finger-tight.

3.

Mount the indicator plate (1) to the bracket (6) as shown
in FIGURE 7 with the shakeproof washers placed between
the indicator plate (1) and the bracket (6). The indicator
plate fasteners (4) should be finger-tight at this time.

4. Place the locking lever handle (2) on the valve stem as
shown in FIGURE 7 and tighten the pinch fastener (3)
provided.

5. Position the indicator plate (1) so that the locking lever
fits in the “closed” position of the indicator plate (1).
Tighten the indicator plate fasteners (4) and the bracket
fasteners (7). (Be sure that the lever cannot be moved
with a 5/16 padlock installed in locking hole.)

6. Cycle the valve from closed to open, to closed again,
using the locking lever handle. Recheck to make sure the
disc is centered on the seat by measuring the distance
from the machined surface on the disc to the machined
flanged surface (6) on the body. This should be done at
two points, one above or below the disc over travel stop
and the other 180 degrees from the first. Both measure­ments should be equal.

SECTION XI

CHANGING LOCKING LEVER HANDLE QUADRANTS

(See FIGURE 7 below.)

Do not attempt to change locking lever handle quadrants while
the valve is in service.

1. Close the valve. The flats on top of the stem should be
parallel with the valve flange face. Depressurize system
if valve is installed as valve could open when the locking
lever handle is removed.

FIGURE 7

2. Remove the locking lever handle (2) and indicator
plate (1).

3. Mount the indicator plate (1) 180 degrees from the
position shown in FIGURE 7. Do not tighten the indicator
plate fasteners (4) at this time.

4. Follow Steps 4 and 5 in the Locking Lever Handle and
Indicator Plate Installation Instructions above.

27

DURCO BX2001 USER INSTRUCTIONS ENGLISH 9-13

L1

L



SAT SD

SECTION XII

BX2001 VALVE DIMENSIONS for Valves with Actuators

The Durco Big Max BX2001
valve is designed for instal­la tion between ASME B16.5
Class 150 and 300 flanges.
All styles of metallic flanges
are permis sible if clear ance
is provided for the swing of
the disc. Install the valve with
the disc in the closed posi­tion. Valve should be centered
between flanges in order
that the disc does not hit
the flange/pipe when the
valve is opened.

L1

L

SAT SD

M

W



N

K

28

DURCO BX2001 USER INSTRUCTIONS ENGLISH 9-13

SECTION XII

BX2001 VALVE DIMENSIONS for Valves with Actuators

Disc Projection

Gear Lever

Size A B K L L1 M N W X Gear M W
in in in in in in in in in in Type in in

(mm) (mm) (mm) (mm) (mm) (mm) (mm) (mm) (mm) (mm) (mm) (mm)

2 3/8 11/4 77/8 31/8 15/8 815/16 8 51/4 115/16
(50) (10) (32) (200) (79) (41) (227) (203) (133) (49) (205) (355)

2 3/8 11/4 77/8 31/8 15/8 815/16 8 51/4 115/16
(50) (10) (32) (200) (79) (41) (227) (203) (133) (49) (205) (355)
3
(80) (17) (62) (219) (79) (41) (246) (203) (133) (49) (224) (355)
3
(80) (17) (62) (219) (79) (41) (246) (203) (133) (49) (224) (355)
4 1
(100) (29) (92) (232) (79) (41) (259) (203) (133) (49) (236) (355)
4 1
(100) (29) (92) (232) (79) (41) (259) (203) (133) (49) (236) (355)
5 1

11

/16 27/16 85/8 31/8 15/8 911/16 8 51/4 115/16

11

/16 27/16 85/8 31/8 15/8 911/16 8 51/4 115/16

1

/8 35/8 91/8 31/8 15/8 103/16 8 51/4 115/16

1

/8 35/8 91/8 31/8 15/8 103/16 8 51/4 115/16

1

/2 41/2 103/4 35/8 21/2 121/4 8 63/4 23/8

(125) (38) (114) (273) (92) (64) (311) (203) (171) (60) (290) (355)
6 21/16 59/16 111/4 35/8 21/2 123/4 8 63/4 23/8

(150) (52) (141) (286) (92) (64) (324) (203) (171) (60) (290) (355)
6 2

(150) (52) (141) (286) (92) (64) (324) (203) (171) (60) (290) (355)
8 2

1

/16 59/16 111/4 35/8 21/2 123/4 8 63/4 23/8

5

/8 7 127/8 43/8 21/2 143/4 12 81/4 25/8

(200) (67) (178) (327) (111) (64) (375) (305) (210) (67) (333) (610)
8 2

5

/8 7 133/8 43/8 21/2 151/4 12 81/4 25/8

(200) (67) (178) (340) (111) (64) (387) (305) (210) (67) Available Available
10 3

(250) (92) (237) (371) (111) (64) (419) (305) (210) (67) Available Available
10 3

(250) (92) (237) (394) (111) (64) (441) (305) (210) (67) Available Available
12 4

(300) (114) (289) (408) (127) (64) (460) (305) (248) (77) Available Available
12 4

5

/8 95/16 145/8 43/8 21/2 161/2 12 81/4 25/8

5

/8 95/16 151/2 43/8 21/2 173/8 12 81/4 25/8

1

/2 113/8 161/16 5 21/2 181/8 12 93/4 31/32

1

/2 103/4 167/8 5 21/2 19 12 93/4 31/32

(300) (114) (273) (429) (127) (64) (483) (305) (248) (77) Available Available
14 5 12

(350) (127) (323) (448) (168) (89) (502) (457) (259) (111) Available Available
14 4
(350) (105) (310) (576) (168) (89) (662) (457) (354) (33) Available Available
16 5
(400) (147) (373) (503) (194) (89) (560) (457) (310) (137) Available Available
16 4

1

/8 127/32 2211/16 65/8 31/8 261/16 18 1315/16 15/16

25

/32 1445/64 1913/16 75/8 31/2 221/16 18 123/16 53/8

51

/64 143/32 247/8 75/8 31/2 281/4 18 159/16 21/16

45

/64 175/8 65/8 31/2 193/4 18 103/16 43/8

(400) (122) (358) (632) (194) (89) (718) (457) (395) (52) Available Available
18 63/8 169/16 2115/32 75/8 31/2 233/4 18 123/16 53/8

(450) (162) (420) (545) (194) (89) (603) (457) (310) (137) Available Available
18 5
(450) (136) (402) (711) (195) (111) (773) (610) (437) (138) Available Available
20 7

(500) (180) (469) (581) (194) (89) (649) (457) (310) (137) Available Available

6

20

(500) (159) (438) (626) (232) (111) (714) (457) (400) (60) Available
24 8

11

/32 1527/32 28 711/16 43/8 307/16 24 173/16 527/64

3

/32 1815/32 227/8 75/8 31/2 259/64 18 123/16 53/8

1

/4 171/4 245/8 91/8 43/8 281/8 18 153/4 23/8

5

/16 223/32 261/16 91/8 43/8 297/16 18 153/4 23/8

(600) (211) (561) (662) (232) (111) (748) (457) (400) (60) Available Available
30 11 28

3

/8 311/4 97/16 43/4 345/8 18 1615/32 211/16

(750) (279) (721) (794) (240) (121) (879) (457) (418) (68) Available Available
36 13

41

/64 343/8 401/4 97/16 43/4 435/8 24 1723/32 211/16 Not Not

(900) (346) (873) (1022) (240) (121) (1108) (610) (450) (68) Available Available
36 13

41

/64 343/8 401/4 911/16 43/4 473/4 24 2011/32 6 Not Not

(900) (346) (873) (1022) (240) (121) (1108) (610) (450) (68) Available Available

ASME Class 150

All dimensions are approximate and for illustration purposes only. For exact dimensions request certified dimensional prints.

ASME Class 300

81/16 14

HF-MX30

81/16 14

HF-MX30

813/16 14

HF-MX30

813/16 14

HF-MX30

95/16 14

HF-MX30

95/16 14

HF-MX30

117/16 14

HF-MZ30

117/16 14

HF-MZ30

117/16 14

HF-MZ30

131/8 24

HF-MV

Not Not

HF-MV

Not Not

HF-MV

Not Not

HF-MV

Not Not

HF-MY40

Not Not

HF-MY40

Not Not

MB-60

Not Not

HSMBF/S3

Not Not

MC-60

Not Not

HFMBF/S3

Not Not

MC-60

Not Not

MD/55

Not Not

MC-60

Not

MDF/S3

Not Not

MDF/S3

Not Not

MGF/S3

HFMGF/S5

FOR 195
PSIG ∆P

HFMGF/S5

FOR 285
PSIG ∆P

Not

Available

29

DURCO BX2001 USER INSTRUCTIONS ENGLISH 9-13

C

L1

L



SAT SD

H

Q

G

1

G

A

Seat Side A1

T Ø (4) Holes

M

K

N

W

L1

L



SAT SD

SECTION XIII

BX2001 VALVE DIMENSIONS for Wafer and Lug Valves

T ø (2) Holes

2 in (50 mm), 3 in (75 mm),

4 in (100 mm)

2 in (50 mm) - 12 in (300 mm)

T ø (4) Holes

6 in (150 mm), 8 in (200 mm),

10 in (250 mm), 12 in (300 mm)

14 in (350 mm) - 18 in (450 mm)

Q

T Ø (4) Holes

A

1

G

Wafer

G

SQ

Seat Side A1

J Length of Flats

Z

Lug

Y

B

R.F.

D1

20 in (500 mm) - 24 in (600 mm) 20 in (500 mm) Class 300

30

30 in (750 mm) - 36 in (900 mm)

DURCO BX2001 USER INSTRUCTIONS ENGLISH 9-13

SECTION XIII

BX2001 VALVE DIMENSIONS for Wafer and Lug Valves

Dimensions Common to BX2 Wafer and Lug Valves

Size A A1 B C D D1 G G1 H H1 J Q T Y Z Shaft
in in in in in in in in in in in in in in in in in Ø

(mm) (mm) (mm) (mm) (mm) (mm) (mm) (mm) (mm) (mm) (mm) (mm) (mm) (mm) (mm) (mm) (mm)

2 1

3

/4 11/16 37/8 13/8 21/2 21/2 35/8
(50) (44) (27) (98) (35) (64) (64) (920) (16) (17) (114) 5/8 DP (121) (68) (16)
2 1

3

/4 11/16 37/8 13/8 221/32 215/16 35/8
(50) (44) (27) (98) (35) (67) (75) (920) (16) (17) (114) 5/8 DP (121) (68) (16)
3 1

7

/8 11/8 5 17/16 31/

8

31/8 35/8
(80) (48) (29) (127) (36) (79) (79) (92) (16) (17) (114) 5/8 DP (140) (68) (16)
3 1

15

/16 11/8 5 23/4 33/

8

313/16 35/8
(80) (49) (29) (127) (70) (86) (97) (92) (8) (21) (114) 5/8 DP (140) (68) (16)
4 2

1

/8 11/4 63/16 11/2 35/

8

47/32 35/8
(100) (54) (32) (157) (38) (92) (107) (92) (16) (17) (114) 5/8 DP (152) (68) (16)
4 2

3

/16 11/4 63/16 23/4 37/

8

425/64 35/8
(100) (57) (32) (157) (70) (86) (112) (92) (8) (21) (114) 5/8 DP (152) (68) (16)
5 2

1

/4 15/16 75/16 215/16 43/

16

43/16 41/4 11/8 11/16 51/4 1/2-13 61/2 313/16 7/
(125) (57) (33) (186) (75) (106) (106) (108) (29) (17) (133) 5/8 DP (165) (97) (22)
6 2

1

/4 15/16 81/2 17/8 411/

16

55/32 41/4 11/8 11/16 51/4 1/2-13 7 313/16 7/
(150) (57) (33) (216) (47) (119) (131) (108) (29) (17) (133) 5/8 DP (178) (97) (22)
6 2

3

/8 15/16 81/2 215/16 53/

8

57/8 41/4
(150) (60) (33) (216) (75) (137) (149) (108) (14) (21) (133) 5/8 DP (178) (97) (22)
8 2

7

/16 13/8 105/8 2 6 65/16 41/4 11/8 11/8 6 1/2-13 81/4 41/4 13/
(200) (62) (35) (270) (51) (152) (160) (108) (29) (29) (152) 5/8 DP (210) (108) (28)
8 2

29

/32 13/8 105/8 31/16 649/64 75/32 41/4
(200) (74) (35) (270) (78) (172) (182) (108) (14) (29) (152) 5/8 DP (222) (108) (28)
10 2

15

/16 111/16 123/4 23/8 73/

4

73/4 51/4 11/4 11/8 61/2 5/8-11 10 41/4 13/
(250) (75) (43) (324) (60) (197) (197) (133) (32) (29) (165) 3/4 DP (254) (108) (35)
10 3

11

/32 13/4 123/4 3229/32 81/

2

81/2 51/4
(250) (85) (45) (324) (99) (216) (216) (133) (16) (29) (165) 3/4 DP (276) (108) (38)
12 3

5

/16 115/16 15 23/8 9 91/4 51/4 11/4 11/2 7 5/8-11 111/2 43/4 15/
(300) (84) (49) (381) (60) (229) (235) (133) (32) (38) (178) 3/4 DP (292) (121) (41)
12 3

11

/16 21/64 15 41/2 10 10 6 3/4 11/2 71/2 5/8-11 121/4 43/4 13/
(300) (94) (51) (381) (114) (254) (254) (152) (19) (38) (191) 3/4 DP (311) (121) (45)
14 3

3

/4 29/32 161/4 23/4 14 65/8 11/2 11/2 8 1/2-13 121/2 47/8 13/
(350) (95) (58) (413) (70) (356) (168) (38) (38) (203) 3/4 DP (317) (124) (44)
14 4

3

/4 223/64 175/8 43/8 191/8 7 21/2 13/4 81/2 5/8-11 153/
(350) (121) (60) (448) (111) (486) (178) (64) (44) (216) 11/8 DP (391) (191) (54)
16 4

1

/8 213/32 181/2 33/16 157/8 7 11/2 21/8 9 1/2-13 143/16 6 2
(400) (105) (61) (470) (81) (403) (178) (38) (54) (228)
16 5

8

/

221/

32

197/

8

5

203/

4

7

3

(400) (137) (67) (505) (127) (527) (178) (64) (59) (222) 11/8 DP (441) (213) (64)
18 4

5

/8 217/32 21 31/16 177/8 7 11/2 23/8 9 1/2-13 1515/16 61/8 21/
(450) (118) (64) (533) (78) (454) (178) (38) (60) (228) 3/4 DP (404) (155) (57)
18 6 3 22

/

8

55/

2319/

32

7

3

8

(450) (152) (76) (568) (143) (599) (178) (64) (73) (219) 11/8 DP (508) (219) (70)
20 5

8

/

225/

32

23 43/

8

245/

16

2

71/

1

(500) (130) (71) (584) (111) (617) (191) (51) (70) (228) 1 DP (425) (181) (64)
20 6

3

/8 37/32 27 65/

8

19 813/

16

(500) (162) (82) (686) (168) (483) (224) (51) (78) (276) 1 DP (467) (189) (76)
24 6

3

/16 35/32 271/4 51/8 271/2 813/16 2 31/8 107/8 3/4-10 193/4 77/16 3
(600) (157) (80) (692) (130) (698) (224) (51) (79) (276) 1 DP (501) (189) (76)
30 7

1

/2 4 333/4 51/2 321/4 813/16 2 3 111/4 3/4-10 241/4 73/4 31/
(750) (191) (102) (857) (139) (819) (224) (51) (76) (285) 1 DP (616) (197) (89)
36 8

1

/16 47/32 401/4 61/4 411/2 91/2 4 5 111/2 3/4-10 301/4 121/4 4

(900) (205) (107) (1022) (158) (1054) (241) (102) (127) (292) 1 DP (768) (311) (102)

ASME Class 150 ASME Class 300

All dimensions are approximate and for illustration purposes only. For exact dimensions request certified dimensional prints.

.440 .589

5

/8 11/16 41/2 1/2-13 43/4 211/16 5/

.438 .584

11.17 14.96
(11.13) (14.83
.440 .589

5

/8 11/16 41/2 1/2-13 43/4 211/16 5/

.438 .584

11.17 14.96
(11.13) (14.83)
.440 .589

5

/8 11/16 41/2 1/2-13 51/2 211/16 5/

.438 .584

11.17 14.96
(11.13) (14.83
.440 .589

5

/16 13/16 41/2 1/2-13 51/2 211/16 5/

.438 .584

11.18 14.96
(11.13) (14.83
.440 .589

5

/8 11/16 41/2 1/2-13 6 211/16 5/

.438 .584

11.17 14.96
(11.13) (14.83
.440 .589

5

/16 13/16 41/2 1/2-13 6 211/16 5/

.438 .584

11.17 14.96
(11.13) (14.83
.623 .812
.621 .807

15.82 20.62
(15.77) (20.50
.623 .812
.621 .807

15.82 20.62
(15.77) (20.50
.623 .812

9

/16 13/16 51/4 1/2-13 7 313/16 7/

.621 .807

15.82 20.62

(

15.77) (20.50
.748 1.057
.746 1.052

19.00 26.85
(18.95) (26.72
.748 1.057

9

/16 11/8 6 1/2-13 83/4 41/2 13/

.746 1.052

19.00 26.85
(18.95) (26.72
.873 1.339
.871 1.334

22.17 34.01
(22.12) (33.88
.873 1.339

5

/8 11/8 61/2 5/8-11 107/8 41/4 11/

.871 1.334

22.17 34.01
(22.12) (33.88
.997 1.500
.995 1.495

25.32 38.10
(25.27) (37.97
.997 1.500
.995 1.495

25.32 38.10
(25.27) (37.97

1.124

1.122
28,549
(28,498

1.421

1.416
36,093
(35,966

1.248

1.246
31,699
(31,648

1.686

2

21/

1.684
42,824
(42,774

1.248

1.246
31,699
(31,648

1.874

2

21/

1.872
47,599
(47,548

1.874

2

1.872
47,599
(47,548

2.250

2 31/

2.248
57,150
(57,099

2.250

2.248
57,150

(

57,099

2.624

2.622
66,649
(66,598

2.906

2.904
73,812

(73,762

)

)

)

)

)

)

)

)

)

)

)

)

)

)

)

8

71/2 21/

)

3

)

16

25/

/4 DP (360) (152) (51)

5

4

83/

/8-11 173/

8

83/8 21/

)

)

27/

8

85/

8

5

/8-11 20

85/8 23/

)

23/

4

9

3

/4-10 163/

4

71/8 21/

)

107/

3

8

/4-10 183/8 77/

16

8

)

)

)

)

8

8

8

8

8

8

8

8

8

32

32

8

2

8

4

4

8

2

4

4

2

3

2

31

DURCO BX2001 USER INSTRUCTIONS ENGLISH 9-13

SECTION XIV

BX2001 FLANGE DRILLING SPECIFICATIONS — Fastener Thread Sizes

Due to the hydrodynamic
torque encountered with
butterfly valves, safe operating
practices dictate that manual
gear operators, pneumatic
actuators or electric actuators
be used when these differen­tial pressures are exceeded.

Maximum Differential Pressures

Valve Size Max ∆P –
in (mm) Valve 90° open†

3 34 PSIG
(80) (2.3 bar)

4 16 PSIG
(100) (1.1 bar)

6 7 PSIG
(150) (.5 bar)

8 5 PSIG
(200) (.3 bar)

†Based on a 120 pound maximum force on wrench.
See MSS SP91 for further clarification.

Wafer Style – Class 150 and 300 Drilling

Size No. of Hole Size B.C. No. of Thread Size B.C B1
in (mm) Holes Inch in (mm) Fasteners Inch in (mm) in (mm)

2 (50) 4
2 (50) 2
3 (80) 2
3 (80) 2
4 (100) 2
4 (100) 2
6 (150) 2
6 (150) 2
8 (200) 2
8 (200) 2 1 13 (330) 12
10 (250) 2 1 14
10 (250) 4*** 1 15
12 (300) 2 1 17 (432) 12
12 (300) 4*** 1
14 (350) 4 1
14 (350) 8* 1
16 (400) 4 1
16 (400) 8* 1
18 (450) 4 1
18 (450) 8* 1
20 (500) 8* 1
20 (500) 10* 1
24 (600) 8* 1
30 (750) 16* 1
36 (900) 16** 1

ASME Class 150

All dimensions are approximate and for illustration purposes only. For exact dimensions request certified dimensional prints.
* The two fastener holes on either side of the shaft, top and bottom, are tapped blind holes (both sides).
** Four fastener holes, two on either side of the shaft top and bottom, are tapped blind holes, both sides.
*** The two fastener holes on either side of the shaft, top and bottom, are tapped through.

3

/4 43/4 (121) 4 5/8-11 43/4 (121) 6 (152)

3

/4 5 (127) 8

3

/4 6 (152) 4

7

/8 65/8 (168) 8

3

/4 71/2 (191) 8 5/8-11 71/2 (191) 9 (229)

7

/8 77/8 (200) 8 3/4-10 77/8 (200) 93/8 (238)

7

/8 91/2 (241) 8 3/4-10 91/2 (241) 11 (279)

7

/8 105/8 (270) 12 3/4-10 105/8 (270) 121/8 (308)

7

/8 113/4 (298) 8 3/4-10 113/4 (298) 131/2 (343)

1

/8 173/4 (451) 16 11/8-8 173/4 (451) 201/4 (514)

1

/16 183/4 (476) 12 1-8 183/4 (476) 21 (533)

1

/8 201/4 (514) 20* 11/8-8 201/4 (514) 23 (584)

1

/16 211/4 (540) 16 1-8 211/4 (540) 231/2 (597)

1

/4 221/2 (572) 20* 11/4-8 221/2 (572) 251/2 (648)

3

/16 223/4 (578) 16 11/8-8 223/4 (578) 25 (635)

1

/4 243/4 (628) 24* 11/4-8 243/4 (628) 28 (711)

1

/8 25 (635) 20* 11/8-8 25 (635) 271/2 (699)

1

/4 27 (686) 24* 11/4-8 27 (686) 30 (762)

1

/4 291/2 (749) 20* 11/4-8 291/2 (749) 32 (813)

1

/4 36 (914) 28** 11/4-8 36 (914) 383/4 (984)

1

/2 423/4 (1086) 32** 11/2-8 423/4 (1086) 46 (1168)

ASME Class 300

Lug Style – Class 150 and 300 Drilling

5

/8-11 5 (127) 61/4 (154)

5

/8-11 6 (152) 71/2 (191)

3

/4-10 65/8 (168) 81/8 (206)

7

1

/4 (362) 12 7/8-9 141/4 (362) 16 (406)

1

/4 (387) 16 1-8 151/4 (387) 171/4 (438)

/8-9 13 (330) 143/4 (315)

7

/8-9 17 (432) 19 (483)

Big Max high performance butterfly valves
meet the following flange
specifications:

ASME B16.5 2 in (50 mm) -
24 in (600 mm)
MSS SP44 30 in (750 mm) &
36 in (900 mm)
ASME B16.47 30 in (750 mm) &
(Series A) 36 in (900 mm)

32

SECTION XV

BX2001 VALVE AND OPERATOR WEIGHTS

DURCO BX2001 USER INSTRUCTIONS ENGLISH 9-13

BX Manual Operator Weights

Valve Size in (mm) Locking Lever Gear

2 (50) 6 lbs (2.7 kg) 11 lbs (5 kg)
2 (50) 6 lbs (2.7 kg) 11 lbs (5 kg)
3 (80) 6 lbs (2.7 kg) 11 lbs (5 kg)
3 (80) 6 lbs (2.7 kg) 11 lbs (5 kg)
4 (100) 6 lbs (2.7 kg) 11 lbs (5 kg)
4 (100) 6 lbs (2.7 kg) 11 lbs (5 kg)
6 (150) 6 lbs (2.7 kg) 11 lbs (5 kg)
6 (150) 6 lbs (2.7 kg) 11 lbs (5 kg)
8 (200) 20 lbs (9.1 kg) 28 lbs (12.7 kg)
8 (200) 20 lbs (9.1 kg) 28 lbs (12.7 kg)
10 (250) N/A 28 lbs (12.7 kg)
10 (250) N/A 28 lbs (12.7 kg)
12 (300) N/A 31 lbs (14 kg)
12 (300) N/A 31 lbs (14 kg)
14 (350) N/A 64 lbs (29.0 kg)
14 (350) N/A 94 lbs (42.6 kg)
16 (400) N/A 76 lbs (34.5 kg)
16 (400) N/A 108 lbs (49.0 kg)
18 (450) N/A 76 lbs (34.5 kg)
18 (450) N/A 125 lbs (56.7 kg)
20 (500) N/A 76 lbs (34.5 kg)
20 (500) N/A 101 lbs (45.8 kg)
24 (600) N/A 101 lbs (45.8 kg)
30 (750) N/A 156 lbs (70.8 kg)
HFM GF/S5

36 (900) N/A

HFM GF/D9

ASME Class 150

All dimensions are approximate and for illustration purposes only. For exact dimensions request certified dimensional prints.

156 lbs (70.8 kg)

224 lbs (101.6 kg)

ASME Class 300

BX Valve Weights* in Pounds (Kilograms)

Valve Size in (mm) BX2W BX2L

2 (50) 12 lbs (5.4 kg) 12 lbs (5.4 kg)

2 (50)
3 (80) 16 lbs (7.3 kg) 18 lbs (8.2 kg)

3 (80) 15 lbs (6.8 kg) 21 lbs (9.5 kg)
4 (100) 20 lbs (9.1 kg) 26 lbs (11.8 kg)
4 (100) 20 lbs (9.1 kg) 27 lbs (12.2 kg)
5 (125) 30 lbs (13.5 kg) 35 lbs (15.8 kg)
6 (150) 35 lbs (15.9 kg) 40 lbs (18.1 kg)
6 (150) 36 lbs (16.3 kg) 52 lbs (23.6 kg)
8 (200) 58 lbs (26.3 kg) 68 lbs (30.8 kg)
8 (200) 63 lbs (28.6 kg) 90 lbs (40.8 kg)
10 (250) 86 lbs (39 kg) 104 lbs (47.1 kg)
10 (250) 106 lbs (48 kg) 146 lbs (66 kg)
12 (300) 125 lbs (56.7 kg) 160 lbs (72.6 kg)
12 (300) 161 lbs (73 kg) 230 lbs (104 kg)
14 (350) 250 lbs (113.4 kg) 300 lbs (136 kg)
14 (350) 345 lbs (157 kg) 636 lbs (289 kg)
16 (400) 325 lbs (147.4 kg) 400 lbs (181.4 kg)
16 (400) 480 lbs (218 kg) 900 lbs (408 kg)
18 (450) 400 lbs (181.4 kg) 500 lbs (226.8 kg)
18 (450) 685 lbs (311 kg) 1170 lbs (530.7 kg)
20 (500) 467 lbs (211.8 kg) 624 lbs (283 kg)
20 (500) 650 lbs (295 kg) 950 lbs (432 kg)
24 (600) 665 lbs (301.6 kg) 880 lbs (399 kg)
30 (750) 1050 lbs (476.3 kg) 1425 lbs (646.4 kg)
36 (900) 2162 lbs (980.7 kg) 2748 lbs (1246.5 kg)

10 lbs (4.5 kg) 14 lbs (6.4 kg)

33

DURCO BX2001 USER INSTRUCTIONS ENGLISH 9-13

SECTION XVI

DIMENSIONS OF FASTENERS REQUIRED FOR INSTALLATION — CLASS 150

STUD FASTENERS

BX2-Valves
Wafer Style

Class-150
2" Thru 12"

ASME B16.5 Flange
Thickness

1

/8" Thick Composite

Gasket

Seat Side
Of Valve

Valve Size

(mm) (50) (80) (100) (125) (150) (200) (250) (300)

Size - Dia. & Thread in

in 2 3 4 5 6 8 10 12

5

/8 - 11 3/4 - 10 7/8 - 9

No. of Stud Fasteners 4 4 8 8 8 8 12 12

1

“A” Length of in 5 5

/2 53/4 61/4 61/4 63/4 71/4 8

Stud Fasteners (mm) (127) (140) (146) (159) (159) (171) (184) (203)

CAP SCREW FASTENERS

BX2-Valves
Lug Style

Class-150

3" Thru 12"

Seat Side

Of Valve
ASME B16.5 Flange
Thickness

1

/8" Thick Composite

Gasket

STUD FASTENERS

BX2-Valves
Wafer Style

Class-150
14" Thru 24"
ASME B16.5
Flange Thickness

30" and 36"
MSS SP44
and B16.47
(Series A)
Flange Thickness

1

/8" Thick Composite

Gasket

Seat Side
Of Valve

Valve Size

(mm) (50) (80) (100) (125) (150) (200) (250) (300)

Size - Dia. & Thread in

in 2 3 4 5 6 8 10 12

5

/8 - 11 3/4 - 10 7/8 - 9

No. of “A” Fasteners 4 4 8 8 8 8 12 12
“A” Length of in 2 2 2

1

/4 21/4 21/4 21/2 23/4 23/4

Fasteners (mm) (50) (50) (57) (57) (57) (63) (70) (70)

No. of “B” Fasteners 4 4 8 8 8 8 12 12

“B” Length of in 1

3

/4 13/4 13/4 2 2 2 21/4 21/4

Fasteners (mm) (44) (44) (44) (50) (50) (50) (57) (57)

Valve Size

(mm) (350) (400) (450) (500) (600) (750) (900)

Size - Dia. & Thread in 1 - 8 1

in 14 16 18 20 24 30 36

1

/8 - 8 11/4 - 8 11/

2

- 8

No. of Stud Fasteners 12 16 16 16 16 24 24
“A” Length of in 9 9

1

/2 101/2 111/4 13 161/2 19

Stud Fasteners (mm) (230) (240) (270) (290) (330) (420) (480)
No. of “B” Fasteners

“B” Length of in
Fasteners (mm) (90) (85) (110) (140)

No. of “C” Fasteners
“C” Length of in

Fasteners (mm) (75) (90) (115) (135)

— — — 4 4 4 8

1

3

— — —

— — —

— — —

/2 31/4 41/4 51/

4 4 4 8
3 3

1

/2 41/2 51/

2

4

CAP SCREW FASTENERS

BX2-Valves
Lug Style

Class-150
14" Thru 24"

ASME B16.5
Flange Thickness

30" and 36"
MSS SP44
and B16.47
(Series A)
Flange Thickness

1

/8" Thick Composite

Gasket

34

Seat Side
Of Valve

Valve Size
(mm) (350) (400) (450) (500) (600) (750) (900)

Size - Dia. & Thread

in 14" 16" 18" 20" 24" 30" 36"

in 1 - 8 1

1

/8 - 8 11/4 - 8 11/

2

- 8

No. of Stud Fasteners 12 16 16 16 16 24 24
“A” Length of in 3

1

/4 31/4 31/4 33/4 41/4 5 71/2

Stud Fasteners (mm) (85) (85) (85) (95) (110) (130) (190)

C

D

No. of “B” Fasteners 12 16 16 16 16 24 24
“B” Length of in 2

Fasteners (mm) (70) (75) (85) (90) (110) (130) (180)

3

/4

3

1

/4 31/2 41/4 5 7

3

No. of “C” Fasteners — — — 4 4 4 8

A

B

“C” Length of in

Fasteners (mm) (90) (100) (120) (140)

No. of “D” Fasteners
“D” Length of in

Fasteners (mm) (75) (90) (115) (135)

— — —

— — —

— — —

1

3

/2 4 43/4 51/

4 4 4 8
3 3

1

/2 41/2 51/

2

4

DURCO BX2001 USER INSTRUCTIONS ENGLISH 9-13

SECTION XVII

DIMENSIONS OF FASTENERS REQUIRED FOR INSTALLATION — CLASS 300

STUD FASTENERS

BX2-Valves
Wafer Style

Class-300
2" Thru 12"

ASME B16.5 Flange
Thickness

1

/8" Thick Composite

Gasket

Seat Side
Of Valve

Valve Size

(mm) (50) (80) (100) (150) (200)

Size - Dia. & Thread in

in 2 3 4 6 8

5

/8 - 11

3

/4 - 10

No. of Stud Fasteners 8 8 8 12 12

1

“A” Length of in 5

/2 61/2 7 71/2 81/2

Stud Fasteners (mm) (140) (165) (178) (190) (215)

7

/8 - 9

CAP SCREW FASTENERS

BX2-Valves
Lug Style

Class-300

3" Thru 12"

Seat Side

Of Valve
ASME B16.5 Flange
Thickness

1

/8" Thick Composite

Gasket

STUD FASTENERS

BX2-Valves
Wafer Style

Class-300
14" Thru 24"
ASME B16.5
Flange Thickness

30" and 36"
MSS SP44
and B16.47
(Series A)
Flange Thickness

1

/8" Thick Composite

Gasket

Seat Side
Of Valve

Valve Size

(mm) (50) (80) (100) (150) (200)

Size - Dia. & Thread in

in 2 3 4 6 8

5

/8 - 11

3

/4 - 10

7

/8 - 9

No. of “A” Fasteners 8 8 8 12 12
“A” Length of in 1

3

/4 21/4 21/2 23/4 3

Fasteners (mm) (44) (57) (64) (70) (75)

No. of “B” Fasteners 8 8 8 12 12

“B” Length of in 1

3

/4 2 21/4 21/2 3

Fasteners (mm) (44) (50) (57) (64) (75)

Valve Size

(mm) (250) (300) (350) (400) (450) (500)

Size - Dia. & Thread in 1 - 8 1

in 10 12 14 16 18 20

1

/8 - 8 11/4 - 8

No. of Stud Fasteners 12 12 16 16 20 20
“A” Length of in 10 10

3

/4 121/4 131/4 141/2 15

Stud Fasteners (mm) (254) (275) (310) (340) (370) (380)
No. of “B” Fasteners

“B” Length of in 3
Fasteners (mm) (90) (95) (90) (95) (95) (100)

No. of “C” Fasteners 4
“C” Length of in 3

Fasteners (mm) (85) (90) (90) (95) (95) (100)

4 4 4 4 4 4

1

3

2

/

3

1

4

/

3

1

4

/

/2 33/4 33/4 4

3

4

4 4 4 4

1

1

2

/

/2 33/4 33/4 4

3

CAP SCREW FASTENERS

BX2-Valves
Lug Style

Class-300
14" Thru 24"

ASME B16.5
Flange Thickness

30" and 36"
MSS SP44
and B16.47
(Series A)
Flange Thickness

1

/8" Thick Composite

Gasket

Seat Side
Of Valve

C

Valve Size
(mm) (250) (300) (350) (400) (450) (500)

Size - Dia. & Thread

in 10 12 14 16 18 20

in 1 - 8 1

1

/8 - 8 11/

4

- 8

No. of Stud Fasteners 16 16 16 16 20 20
“A” Length of in 3

1

/2 33/4 31/2 33/4 33/4 51/2

Stud Fasteners (mm) (90) (95) (90) (95) (95) (140)

D

No. of “B” Fasteners 16 16 16 16 20 20

1

“B” Length of in 3

Fasteners (mm) (85) (90) (100) (115) (130) (140)

1

/4

/2 4 41/2 5 51/2

3

No. of “C” Fasteners — — 4 4 4 4

A

B

“C” Length of in

Fasteners (mm) (90) (95) (95) (100)

No. of “D” Fasteners
“D” Length of in

Fasteners (mm) (90) (95) (95) (100)

— —

— —

— —

1

3

/2 33/4 33/4 4

4 4 4 4

1

3

/2 33/4 33/4 4

35

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FCD DVENIM0390-02

(Bulletin V-390(E)

September 2013

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