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)

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

* = 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.

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)

= 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 (937) 226-4475.

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.

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

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

and ASTM F467

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.

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.

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.

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

/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

/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

— — —

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.

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

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

SECTION IV

SEAT REPLACEMENT (continued)

SEAt pAckAgE InStALLAtIon – ApEx cLASS Iv MEtAL SEAtED vALvE

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.

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

+ 25 hidden pages