Page 1
Installation, Operation and Maintenance Manual for
Pressure/Vacuum Relief Valves
Models 1800A, 1810A, 1820A, 1830A, 1860A, 1870A
©2009 Groth Corporation
IOM-1800A
Rev. A 12541
Ref. ID: 95806
Page 2
Page 2 of 17
TABLE OF CONTENTS
I. INTRODUCTION 3
II. DESIGN AND FUNCTION 4
1. FIGURE 1 – TYPICAL TANK INSTALLATION 4
2. FIGURE 2 – PRESSURE RELIEF 4
3. FIGURE 3 – VACUUM RELIEF 4
III. SAFETY WARNINGS 5
IV. INSPECTION AND STORAGE 5
V. INSTALLATION 6
1. TABLE 1 – BOLT TORQUE AND STUD SPECIFICATIONS 6
2. TABLE 2 – VALVE WEIGHTS AT MAXIMUM SETTINGS 6
VI. MAINTENANCE 7
1. FIGURE 4 – VALVE CROSS SECTION 7
2. FIGURE 5 – PALLET DETAIL 7
3. TABLE 3 – STEM LENGTH 8
4. FIGURE 6 – SEAT INSERT DETAIL 8
VII. VALVE TESTING PROCEDURE 9
1. TABLE 4 – SEAT LEAKAGE TEST CRITERIA 9
VIII. MODEL IDENTIFICATION 10
IX. PRODUCT LIMITED WARRANTY 11
X. APPENDIX A – MODEL 1800A PRESSURE/VACUUM RELIEF VALVE 12
XI. APPENDIX B – MODEL 1810A VACUUM RELIEF VALVE 13
XII. APPENDIX C – MODEL 1820A PRESSURE/VACUUM RELIEF VALVE 14
XIII. APPENDIX D – MODEL 1830A PRESSURE RELIEF VALVE 15
XIV. APPENDIX E – MODEL 1860A PRESSURE RELIEF VALVE 16
XV. APPENDIX F – MODEL 1870A VACUUM RELIEF VALVE 17
I. INTRODUCTION
Pressure and/or vacuum relief valves are used on liquid storage tanks a nd other process vessels
or systems to prevent structural damage due to excess internal pressure or vacuum.
Storage tanks are pressurized when liquid is pumped in, compressing the existing vapor or when
rising temperatures cause increased evaporation or expansion of existing vapor. Conversely, a
vacuum condition may be created when pumping out or due to falling temperature. To prevent
tank damage, vapor must be allowed into or out of the tank at specified pressure/vacuum
conditions. The volume rate of venting depends upon the tank size, volatility of the tank contents,
the pumping rates and the temperature. Refer to API Standard 2000, ISO 28300, or local
regulations for the procedures to determine venting requirements.
A relief valve must be carefully maintained by a qualified valve technician. It should only be
assembled under clean conditions, preferably in a service shop environme nt. Carefully read and
understand this manual before installing or attempting to repair a valve.
For information not contained in this manual, please contact:
Groth Corporation
13650 N. Promenade Blvd.
Stafford, TX, 77477 USA
Phone: 281-295-6800
Fax: 281-295-6999
www.grothcorp.com
Page 3
Page 3 of 17
II. DESIGN AND FUNCTION
Figure 1 - Typical Tank Installation
Tank protection equipment typically includes an operating valve which is designed to provide
pressure/vacuum relief under normal pump in/out and thermal breathing conditions. An
emergency relief valve can also provide both pressure and vacuum relief and normally it is sized to
provide pressure relief if there is a fire in the immediate vicinity of the tank. It may also be sized by
the tank designer to provide protection in the event of equipment failure (such as the rupture of a
process steam line or an inert gas blanketing system failing open) or operator error.
A typical tank installation is shown in Figure 1 which includes the following Groth products:
1. Model 1820A Pressure/Vacuum Weight Loaded Valve
2. Model 3011H Gas Blanketing Regulator
3. Model 2400A Emergency Pressure Relief Valve
Pressure Relief: As the pressure in the storage tank increases, the vacuum pallet is held shut.
When the set pressure is reached, the pressure pallet lifts and relieves tank
pressure to the atmosphere (or to a header if it is a pipe away valve). See
Figure 2.
Vacuum Relief: As a vacuum is drawn in the storage tank (for example, when fluid is being
pumped out), the pressure pallet is held shut. When the vacuum setting is
reached, the vacuum pallet lifts and air is drawn into the tank from the
atmosphere. See Figure 3.
Figure 2 – Pressure Relief Figure 3 – Vacuum Relief
Page 4
INSTALLATION NOTES: (See Figure 1)
1. Minimum clearance between tank roof and vacuum inlet port must be at least equal to the valve
nominal flange bore.
2. Tank nozzle bore must be greater than or equal to the valve inlet flange bore.
3. Inlet and outlet piping loads must be supported by appropriate structural supports, NOT by the
valve body.
III. SAFETY WARNINGS
This section is an overview of safety guidelines that should be followed during the
installation, operation and maintenance of Groth Pressure/Vacuum Relief Valves. To
understand the context of these instructions and warnings, it is necessary to completely
read and understand the contents of this manual.
The purpose of a weight loaded pressure/vacuum relief valve is to prev ent excessive
pressure or vacuum in a tank or process system. The valve must be designed for the
proper Maximum Allowable Working Pressure (MAWP) and flow requirements of the
system. Consult API Standard 2000, ISO 28300, or local regulations for tank protection
sizing procedures. An improperly specified or functioning relief valve may result in
structural damage to the tank or system, and can cause severe personal injury or death.
Valves are set at the factory according to purchase order specifications. Do NOT change
pressure ratings by adding additional weights to the pallet assembly without consultin g the
factory or your local Groth representative. Adding weights to a valve may restrict pallet lift
and reduce the valve’s rated flow capacity.
DO NOT mix pressure/vacuum pallet assemblies. Failure to ensure that both pallet
assemblies are installed in the correct location can change the pressure and vacuum relief
settings or restrict lift of the pallet. This can cause a tank failure.
DO NOT attempt to remove the valve from the tank or process vessel without first bleeding
all pressure from the system. ALTERNATIVE MEANS OF PRESSURE RELIEF MUST BE
PROVIDED WHEN THE VALVE IS OUT OF SERVICE.
If the valve has been exposed to process vapors while in service, observe all plant
procedures and Material Safety Data Sheets (MSDS) for the products in the system when
inspecting, adjusting or servicing the valve. Take appropriate safety precautions regar ding
eye protection, respiration and skin contact.
The tank pressure required to discharge the normal or emergency venting requirements of
the tank will be increased by the amount of back pressure in the discharge header, on a
pipe away valve configuration. Maximum possible discharge header pressure must be
considered when sizing the pressure relief valve.
IV. INSPECTION AND STORAGE
The pressure/vacuum relief valve is carefully packaged to prevent damage or contamination during
shipping. Inspect all equipment when it is received; report any damage to the carrier immediately.
The valve should be protected during handling and storage. Keep all the ports plugged to prevent
intrusion of foreign materials. Before installation, inspect the unit for indications of physical
damage or internal contamination. If these are observed, the valve must be disassembled,
cleaned and repaired before installation.
Page 4 of 17
Page 5
V. INSTALLATION
A typical valve installation on a tank or vessel is illustrated in Figure 1, Page 4 using a Model
1820A Pressure/Vacuum Relief Valve. Groth's weight loaded Pressure/Vacuum Relief Valves are
designed to provide tank protection for both pressure and/or vacuum to +/-0.5 PSIG settings. The
valves provide full rated flow capacity at 10% over-pressure. Consult factory for performance
under other conditions.
WARNING: The valve must be installed in a vertical position as shown in Figure 1, Page 4.
To achieve nominal flow capacity, the tank nozzle bore must be at least the same nominal
dimension as the relief valve inlet body.
This series of valves all have 150# ANSI flange drilling, unless otherwise specified. Torque
guidelines are listed in Table 1, Page 6. Consult factory for special applications.
The following guidelines should be observed at installation:
1. Inspect the gasket seating surface of the tank nozzle flange. It must be clean, free of
scratches, corrosion, tool marks, and flat.
2. Aluminum valves are furnished as a standard with flat face flanges; they should only be
installed on a mating flat face flange with a full faced gasket.
3. Inspect the gasket; make sure that the material is suitable for the application.
4. Lubricate all studs and nuts with an appropriate thread lubricant. If the valve will see high
temperature service or stainless steel fasteners are used, apply an anti-seize co mpound such
as moly-disulfide.
5. Center the gasket within the bolt circle.
6. Set the valve carefully on the nozzle. Install the studs and tighten nuts hand tight. For studs
selection for blind tapped holes see Table 1, Page 6.
7. Torque all fasteners to half the value listed in Table 1, Page 6, in a staggered, alternating
pattern.
8. Make sure that the flanges are not distorted and that the gasket is evenly compressed. Make
up the final torque and check that no further nut rotation occurs at the torque value specified on
Table 1, Page 6.
Table 1 - Bolt Torque & Stud Specifications - ANSI #150 Flange Connections
Page 5 of 17
Mounting Bolt Torque – Lb-Ft(N-m) Number Bolts Stud Specifications
Flange Raised Face Flat Face Total Thread UNC Stud Length * Qty *
2" 30 (41) 60 (81) 4 5/8" - 11 2.25" 2
3" 54 (73) 108 (146) 4 5/8" - 11 2.50" 2
4" 42 (57) 78 (106) 8 5/8" - 11 2.50" 4
6" 90 (122) 150 (203) 8 3/4" - 10 3.00" 4
8" 126 (171) 228 (309) 8 3/4" - 10 3.00" 4
10" 138 (187) 246 (334) 12 7/8" - 9 3.50" 6
12" 186 (252) 348 (472) 12 7/8" - 9 3.50" 6
(*) - Blind tapped holes only (1800A, 1810A, & 1820A). Use standard ANSI stud length for other holes.
Table 2 - Valve Weights @ Minimum Settings (Aluminum) - Lb. (kg)
Valve Size 1800A 1810A 1820A 1830A 1860A 1870A
2" 16 (7) 15 (7) 26 (12) 12 (5) 16 (7) 12 (6)
3" 21 (9) 21 (10) 34 (16) 15 (7) 22 (10) 17 (8)
4" 31 (14) 32 (14) 49 (22) 20 (9) 29 (13) 23 (10)
6" 57 (26) 61 (28) 93 (42) 30 (14) 55 (25) 42 (19)
8" 75 (34) 81 (37) 137 (62) 45 (20) 92 (42) 71 (32)
10" 116 (53) 121 (55) 186 (85) 65 (30) 105 (48) 83 (38)
12" 157 (71) 165 (75) 260 (118) 100 (45) 149 (68) 118 (54)
Page 6
VI. MAINTENANCE
Groth Corporation recommends that
all service performed on a
pressure/vacuum relief valve is done
at a Groth Authorized Repair Dealer.
Contact Groth Corporation for your
local authorized repair dealer.
Trained mechanics with specialized
test equipment will ensure that the
valve is accurately set.
It is important to regularly inspect the
diaphragm, guides and seating
surfaces to ensure the valve can
open freely. Refer to Figure 4 which
illustrates a typical Pressure/Vacuum
relief valve when disassembling the
unit.
WARNING: Before disassembling valve carefully read and understand the Safety Warnings listed
on page 5.
Refer to the Figure 4 and 5 for Part References
1. Loosen and remove all nuts (#2) and washers (#3).
2. Lift off the vacuum cover (#19) and weatherhood (#10). The weatherhood and weatherhood
posts (#8) have a snug fit. Loosen the hex nuts (#2) and washers (#3) that retain the
weatherhood posts in the body a few turns; this will allow the weatherhood to be removed
easily.
3. Remove the vacuum and pressure pallet assemblies by firmly grasping the stems (#11 & #20)
and lifting up. Depending on the pressure/vacuum settings of the particular valve, weight
plates may have been added to the pallet assemblies. The weights and pallets must be
reinstalled in their original locations. Make sure that all weight plates stay with the appropriate
pallet assembly. Tag the assemblies "Pressure" and "Vacuum" as they are removed from the
valve. Take proper precaution as
lead weights may have been used.
4. Carefully inspect all guides (#18) for
corrosion, damage or product build
up. Also inspect the guide hole in the
vacuum cover (#19). Check the metal
seating surfaces for pitting, corrosion
or product build up. It is
recommended to replace all soft
goods including diaphragms (#13, #14,
#24 & #25), O-Ring (#27) and cover gasket (#22).
NOTE: If the metal seating surfaces are damaged, they must be lapped using a flat ground
metal disc, flatness better than 0.005", and fine grit emery cloth attached to the disc. Wipe the
seating surface clean before proceeding.
5. If the stems are being replaced, check Table 3 to ensure that the correct length is being used
in both the pressure and vacuum ports.
6. Verify that the pallets and weights are back in their proper location. Assemble in reverse
order. Make sure that pallet assemblies sit flat on the seat and that the stem is not cocked
when the weatherhood (#10) and vacuum cover (#19) are installed. Tighten all nuts firmly.
Page 6 of 17
Figure 4 – Valve Cross Section
Figure 5 – Pallet Detail
Page 7
Page 7 of 17
V
WARNING: When assembling a P/V valve, always use the correct length stem (as specified in
Table 3), put the pressure and vacuum pallet assemblies back in their original location and ensure
that the stem is straight and fits into the guide in the cover or weatherhood.
1. If the stem length is too long, pallet lift will be restricted; the valve will not attain its full rated
flow capacity.
2. If the pressure and vacuum pallet assemblies are mixed at assembly, the settings will be
changed and pallet lift may be completely blocked. An over-pressure can occur if any of these
three conditions happens. This can cause a tank failure, severe personal injury and material
damage.
Valve
Size
(In)
2 5.25 (13.34) 7.44 (18.90) N/A 4.69 (11.91)
3 6.88 (17.46) 7.44 (18.90) 5.25 (13.34) 5.81 (14.77)
4 8.94 (22.70) 8.94 (22.71) 6.88 (17.46) 7.13 (18.10)
6 11.94 (30.32) 11.75 (29.85) 8.94 (22.70) 8.88 (22.54)
8 13.56 (34.45) 11.94 (30.33) 11.94 (30.32) 10.88 (27.62)
10 14.94 (37.94) 10.88 (27.64) 13.56 (34.45) 12.63 (32.07)
12 16.56 (42.07) 11.75 (29.85) 14.94 (37.94) 14.94 (37.94)
14 N/A N/A 16.56 (42.07) N/A
Pipe-Away
Pressure Port
in (cm)
Table 3 - Stem Length
Weatherhood
in (cm)
Side Mount
in (cm)
acuum Port
All Others
in (cm)
Seat Replacement (6" – 12" only)
1. The insert is retained in the casting by [3] stainless steel
socket head set screws threaded radially through the
insert. See Figure 6.
2. Remove the screws [#29] with a hex wrench. The screws
were installed with Lok-Tite thread sealant, so you may
need some heat to break them loose.
3. Remove the insert [#27] from the casting by applying force
uniformly around the perimeter. The O-Ring [#28] will
resist removal, but there is a groove between the insert
and casting where force can be applied.
4. Replace or re-install the seat insert with a new O-Ring
[#28]. Lightly coat the O-Ring [#28] with grease and install
into the groove in the insert [#28].
5. Install insert [#27] in the casting and press in all around
until insert is in firm metal-to-metal contact with the
casting.
6. Apply 3-4 drops of Lok-Tite thread sealant to each of the
Figure 6 – Seat Insert Detail
[3] set screws and insert them into the insert until they contact the casting hand-tight.
Page 8
VII. VALVE TESTING PROCEDURE
V
General Information
1. Use only appropriate testing equipment designated by local regulations (e.g. API 2000, ISO
28300, EN14015).
2. Calibrate all measuring devices according to device manufacturer schedule.
Seat Leakage Test (Pressure/Vacuum)
1. Test the pressure and/or vacuum seat leakage three times to verify leak tightness. Record all
test pressure and vacuum readings on the Shop Data Sheet.
2. Slowly open the Test Stand Pressure Test or Vacuum Test valve (supply pressure).
3. Adjust the appropriate flow meter to achieve the specified flow rate listed Table 4 below.
4. With the valve flowing at the flow rate indicated in Table 4, read the test stand supply pressure
using the manometer or gauge.
5. The acceptance criteria for this test are that the peak pressure attained at the specified flow
rate be at least 75% of the specified set pressure or vacuum listed on the sales order.
Perform this test three times to verify proper operation.
6. If the valve fails to meet the 75% criteria, it must be disassembled and the pallet, diaphragm or
seat repaired or replaced. The pallet assembly shall be weighed to confirm that it meets the
weight tolerance specified in the appropriate Assembly Procedure. If the pallet assembly
weight exceeds the limits, adjust the pallet weights and retest beginning at Section 4.3.2.
7. Record the test results under the Seat Leakage Test 1-3 (Pressure/Vacuum) on a Shop Data
Sheet.
Table 4: Seat Leakage Test Criteria
alve Size Test Flow Rate
2" - 6" 0.5 ft3/hr (0.0142 m3/hr)
8"- 12" 5.0 ft3/hr (0.1416 m3/hr)
Set Pressure and/or Vacuum Test
1. Test the set pressure and/or vacuum three times to verify proper operation. Record all test
pressure and vacuum readings on the Shop Data Sheet.
2. With the valve mounted on the test stand from previous test, slowly increase the pressure
while monitoring the air supply pressure flow rate. For vacuum tests, the block valve is opened
sufficiently to allow a steady increase in vacuum condition. As the setting is approached,
continue to open the valve.
3. The set pressure (vacuum) will be the point at which the test pressure (vacuum) does not
increase with a corresponding increase in flow rate. Normally, at this point, the test pressure
(vacuum) will fluctuate up and down as the valve relieves, while the flow rate remains steady.
The set pressure or set vacuum is the maximum pressure or vacuum achieved during the test.
4. Repeat this test two more times to achieve a total of three measurements of set pressure and
vacuum.
5. The acceptable tolerance range for set pressure (vacuum) is +/- 10%. All three test results
must fall within the specified tolerances for the pressure and vacuum settings listed on the
sales order. Record the three set pressures and vacuum measurements on the Shop Data
Sheet.
6. If all three set test values are not within the allowable tolerance, disassemble the valve; inspect
the pallet, seat and diaphragms. It may be necessary to lap the seat or replace one or more
components. If the pallet weight falls within the limits, but still exceeds either the pressure or
vacuum setting tolerance, consult Groth Corporation.
Page 8 of 17
Page 9
Page 9 of 17
VIII. MODEL NUMBER IDENTIFICATION
The nameplate on the Valve contains the Model Number, Serial Number, set pressures and flow
capacity at a specified over-pressure. The Model Number contains additional information about
materials of construction, soft goods and options. The following chart will assist in relating the
Model Number to the characteristics of your valve:
----- ------ -------------
Pallet
1800A 02" Seat Z = Special Options
1810A 03" Body O = No Specials
1820A 04"
1830A 06" J = Steam Jacket
1860A 08" 1 = Aluminum O = No Steam Jacket
1870A 10" 3 = Carbon Steel Z = Special
12" 5 = 316 SS
14"
SEAL MATERIAL
B = Buna-N
T = Fluoropolymer
EXAMPLE: 1800A-02-115-TOO indicates a 2" Model 1800A V = FKM
with Aluminum body and seat, 316SS pallet, Fluoropolymer seat Z = Special
diaphragms and no special options.
The nameplate below shows the basic
information that is listed for each relief valve:
Page 10
II. PRODUCT LIMITED WARRANTY
Only Groth’s Product Limited Warranty terms apply to purchase orders accepted by Groth
Corporation.
Seller warrants that products that are manufactured by Seller are manufactured in accordance with
published specifications and free from defects in materials and/or workmanship for a period of (12)
twelve months. Seller, at its option, will repair or replace any products returned intact to the
factory, transportation charges prepaid, which Seller, upon inspection, determines to be defective
in material and/or workmanship. The foregoing shall constitute the sole remedy for any breach of
Seller’s warranty.
THERE ARE NO UNDERSTANDINGS, AGREEMENTS, REPRESENTATIONS, OR
WARRANTIES, EXPRESS OR IMPLIED (INCLUDING MERCHANTABILITY OR FITNESS FOR A
PARTICULAR PURPOSE REGARDING PRODUCTS) UNLESS SPECIFIED IN THE SALES
CONTRACT. THIS CONTRACT STATES THE ENTIRE OBLIGATION OF SELLER.
Seller makes no warranties, either express or implied, except as provided herein, including without
limitation thereof, warranties as to marketability, merchantability, for a particular purpose or use, or
against infringement of any patent of products. In no event shall Seller be liable for any direct,
incidental or consequential damages of any nature, or losses or expenses resulting from any
defective new product or the use of any such product, including any damages for loss of time,
inconvenience, or loss of use of any such product.
The original Manufacturer shall be solely responsible for the design, development, supply,
production, and performance of its products hereunder, and the protection of its trade name or
names, if any. It assumes no responsibility, for products modified or changed by its agent or
customer, or any other third party. Any such modifications or changes to products sold by Seller
hereunder shall make the product limited warranty null and void.
Groth assumes no responsibility for products modified or changed by Customer or any other third
party. Any such modifications or changes to products sold by Groth hereunder shall make the
product limited warranty null and void. Groth shall be under no obligation to manufacture, sell or
supply, or to continue to manufacture, sell, or supply any of the products.
Page 10 of 17
Page 11
APPENDIX A: Model 1800A Pressure/Vacuum Relief Valve
Page 11 of 17
ITEM DESCRIPTION STANDARD MATERIALS OF CONSTRUCTION
ALUMINUM CARBON STL 316 SS
1 BODY AL(GR 356-T6) CS(GR WCB) 316 SS(GR CF-8M)
2 HEX NUT SS SS SS
3 LOCK WASHER SS SS SS
4 FLAT WASHER SS SS SS
5 STEM GUIDE ALUM CS 316 SS
6 HEX JAM NUT SS SS SS
7 LIFTING LUG (3"-12" ONLY) GALV CS GALV CS GALV CS
8 WEATHERHOOD POST 316 SS 316 SS 316 SS
9 PRESSURE SCREEN 316 SS 316 SS 316 SS
10 WEATHERHOOD ALUM CS 316 SS
11 PRESSURE STEM 316 SS 316 SS 316 SS
12 PRESSURE PALLET (1) (NOT SHOWN) 316 SS 316 SS 316 SS
13 * PRESSURE DIAPHRAGM, PRIMARY (2)(3) (NOT SHOWN) FEP FEP FEP
14 * PRESSURE, DIAPHRAGM, BACKUP (2) (NOT SHOWN) FEP FEP FEP
15 RETAINER PLATE (NOT S HOWN) 316 SS 316 SS 316 SS
16 FLAT WASHER (NOT SHOWN) SS SS SS
17 HEX EXPANDING LOCK NUT (NOT SHOWN) SS SS SS
18 GUIDE ROD 316 SS 316 SS 316 SS
19 COVER AL(GR 356-T6) CS(GR WCB) 316 SS(GR CF-8M)
20 VACUUM STEM 316 SS 316 SS 316 SS
21 STUD SS SS SS
22 * COVER GASKET PTFE PTFE PTFE
23 VACUUM PALLET (1) (NOT SHOWN) 316 SS 316 SS 316 SS
24 * VACUUM DIAPHRAGM, PRIMARY (2)(3) (NOT SHOWN) FEP FEP FEP
25 * VACUUM DIAPHRAGM, BACKUP (2) (NOT SHOWN) FEP FEP FEP
26 VACUUM RETAINER PLATE (NOT SH OWN) 316 SS 316 SS 316 SS
27 SEAT INSERT (6"-12" ONLY) (NOT SHOWN) 316 SS 316 SS 316 SS
28 * O-RING (6"-12" ONLY) (3) (NOT SHOWN) FKM FKM FKM
29 SET SCREW (6"-12" ONLY) (NOT SHOWN) SS SS SS
30 VACUUM SCREEN ASSY. (OPTIONAL) 316 SS 316 SS 316 SS
31 SEAT INSERT (2"-4" ONLY) (NOT SHOWN) (4) N/A 316 SS N/A
32 PALLET WEIGHT (5) (NOT SHOWN) LEAD LEAD LEAD
* SPARE PARTS
(1) PALLET ALSO AVAILABLE IN ALUMINUM.
(2) Fluoropolymer IS A REGISTERED TRADEMARK OF E.I. DU PONT DE NEMOURS AND CO. USED UNDER LICENSE.
(3) ELASTOMERS ALSO AVAILABLE IN AFLAS, BUNA-N, EPDM & FFKM
(4) SEAT: CS UNITS – WELDED
(5) AVAILABLE IN 316 SS; CONSULT FACTORY FOR ALT. MATERIALS.
Page 12
APPENDIX B: Model 1810A Vacuum Relief Valve
Page 12 of 17
ITEM DESCRIPTION STANDARD MATERIALS OF CONSTRUCTION
ALUMINUM CARBON STL 316 SS
1 BODY AL(GR 356-T6) CS(GR WCB) 316 SS(GR CF-8M)
2 HEX BOLT SS SS SS
3 HEX NUT SS SS SS
4 LOCK WASHER SS SS SS
5 * INLET GASKET PTFE PTFE PTFE
6 PRESSURE COVER ALUM CS 316 SS
7 STUD SS SS SS
8 HEX NUT SS SS SS
9 LOCK WASHER SS SS SS
10 COVER AL(GR 356-T6) CS(GR WCB) 316 SS(GR CF-8M)
11 VACUUM STEM 316 SS 316 SS 316 SS
12 * COVER GASKET PTFE PTFE PTFE
13 GUIDE ROD 316 SS 316 SS 316 SS
14 VACUUM PALLET (1) (NOT SHOWN) 316 SS 316 SS 316 SS
15 * VACUUM DIAPHRAGM, PRIMARY (2)(3) (NOT SHOWN) FEP FEP FEP
16 * VACUUM DIAPHRAGM, BACKUP (2) (NOT SHOWN) FEP FEP FEP
17 VACUUM RETAINER PLATE (NOT SH OWN) 316 SS 316 SS 316 SS
18 FLAT WASHER (NOT SHOWN) SS SS SS
19 HEX EXPANDING LOCK NUT (NOT SHOWN) SS SS SS
20 SEAT INSERT (6"-12" ONLY) (4) (NOT SHOWN) 316 SS 316 SS 316 SS
21 * O-RING (6"-12" ONLY) (3) (NOT SHOWN) (NOT SHOWN) FKM FKM FKM
22 SET SCREW (6"-12" ONLY) (NOT SHOWN) SS SS SS
23 VACUUM SCREEN ASSY. (OPTIONAL) 316 SS 316 SS 316 SS
24 SEAT INSERT (4) (NOT SHOWN) N/A 316 SS N/A
25 PALLET WEIGHT (5) (NOT SHOWN) LEAD LEAD LEAD
* SPARE PARTS
(1) PALLET ALSO AVAILABLE IN ALUMINUM.
(2) Fluoropolymer IS A REGISTERED TRADEMARK OF E.I. DU PONT DE NEMOURS AND CO. USED UNDER LICENSE.
(3) ELASTOMERS ALSO AVAILABLE IN AFLAS, BUNA-N, EPDM & FFKM
(4) SEAT: CS UNITS – WELDED
(5) AVAILABLE IN 316 SS; CONSULT FACTORY FOR ALT. MATERIALS.
Page 13
APPENDIX C: Model 1820A Pressure/Vacuum Relief Valve
Page 13 of 17
ITEM DESCRIPTION STANDARD MATERIALS OF CONSTRUCTION
ALUMINUM CARBON STEEL 316 SS
1 BODY AL(GR 356-T6) CS(GR WCB) 316 SS(GR CF-8M)
2 STUD SS SS SS
3 HEX NUT SS SS SS
4 LOCK WASHER SS SS SS
5 PIPE PLUG 316 SS CS 316 SS
6 OUTLET AL(GR 356-T6) CS(GR WCB) 316 SS(GR CF-8M)
7 LOCK WASHER SS SS SS
8 HEX NUT SS SS SS
9 STUD SS SS SS
10 COVER AL(GR 356-T6) CS(GR WCB) 316 SS(GR CF-8M)
11 PRESSURE STEM 316 SS 316 SS 316 SS
12 * COVER GASKET PTFE PTFE PTFE
13 GUIDE ROD 316 SS 316 SS 316 SS
14 PRESSURE PALLET (1) (NOT SHOWN) 316 SS 316 SS 316 SS
15 * PRESSURE DIAPHRAGM, PRIMARY (2)(3) (NOT SHOWN) FEP FEP FEP
16 * PRESSURE DIAPHRAGM, BACKUP (2) (NOT SHOWN) FEP FEP FEP
17 PRESSURE RETAINER PLATE (NOT SHOWN) 316 SS 316 SS 316 SS
18 FLAT WASHER (NOT SHOWN) SS SS SS
19 HEX EXPANDING LOCK NUT (NOT SHOWN) SS SS SS
20 * INLET GASKET PTFE PTFE PTFE
21 GUIDE ROD 316 SS 316 SS 316 SS
22 VACUUM STEM (NOT SHOWN) 316 SS 316 SS 316 SS
23 VACUUM PALLET (1) (NOT SHOWN) 316 SS 316 SS 316 SS
24 * VACUUM DIAPHRAGM, PRIMARY (2)(3) (NOT SHOWN) FEP FEP FEP
25 * VACUUM DIAPHRAGM, BACKUP (2)(3) (NOT SHOWN) FEP FEP FEP
26 VACUUM RETAINER PLATE (NOT SH OWN) 316 SS 316 SS 316 SS
27 SEAT INSERT (6"-12" ONLY) (NOT SHOWN) SS SS SS
28 * O-RING (6"-12" ONLY) (3) (NOT SHOWN) FKM FKM FKM
29 SET SCREW (6"-12" ONLY) (NOT SHOWN) SS SS SS
30 VACUUM SCREEN ASSY. (OPTIONAL) 316 SS 316 SS 316 SS
31 SEAT INSERT (2"-4" ONLY) (4) (NOT SHOWN) N/A OPTIONAL N/A
32 PALLET WEIGHT (5) (NOT SHOWN) LEAD LEAD LEAD
* SPARE PARTS
(1) PALLET ALSO AVAILABLE IN ALUMINUM.
(2) Fluoropolymer IS A REGISTERED TRADEMARK OF E.I. DU PONT DE NEMOURS AND CO. USED UNDER LICENSE.
(3) ELASTOMERS ALSO AVAILABLE IN AFLAS, BUNA-N, EPDM & FFKM
(4) SEAT: CS UNITS – WELDED
(5) AVAILABLE IN 316 SS; CONSULT FACTORY FOR ALT. MATERIALS.
Page 14
APPENDIX D: Model 1830A Pressure Relief Valve
Page 14 of 17
ITEM DESCRIPTION STANDARD MATERIALS OF CONSTRUCTION
ALUMINUM CARBON STL 316 SS
1 BASE AL(GR 356-T6) CS(GR WCB) 316 SS(GR CF-8M)
2 WEATHER HOOD ALUM CS 316 SS
3 WEATHER HOOD POST 316 SS 316 SS 316 SS
4 HEX NUT SS SS SS
5 LOCK WASHER SS SS SS
6 FLAT WASHER SS SS SS
7 STEM GUI DE ALUM CS 316 SS
8 HEX JAM NUT SS SS SS
9 EYE NUT (3"-12" ONLY) SS SS SS
10 PRESSURE SCREEN 316 SS 316 SS 316 SS
11 PRESSURE STEM 316 SS 316 SS 316 SS
12 PRESSURE PALLET (1) (NOT SHOWN) 316 SS 316 SS 316 SS
13 * PRESSURE DIAPHRAGM, PRIMARY (2)(3) (NOT SHOWN) FEP FEP FEP
14 * PRESSURE DIAPHRAGM, BACKUP (2) (NOT SHOWN) FEP FEP FEP
15 PRESSURE RETAINER PLATE (NOT SHOWN) 316 SS 316 SS 316 SS
16 FLAT WASHER (NOT SHOWN) SS SS SS
17 HEX EXPANDING LOCK NUT (NOT SHOWN) SS SS SS
18 SEAT INSERT (6"-12" ONLY) (4) (NOT SHOWN) 316 SS 316 SS 316 SS
19 * O-RING (6"-12" ONLY) (3) (NOT SHOWN) FKM FKM FKM
20 SET SCREW (6"-12" ONLY) (NOT SHOWN) SS SS SS
21 SEAT INSERT (2"-4" ONLY) (4) (NOT SHOWN) N/A 316 SS N/A
22 PALLET WEIGHT (5) (NOT SHOWN) LEAD LEAD LEAD
* SPARE PARTS
(1) PALLET ALSO AVAILABLE IN ALUMINUM.
(2) Fluoropolymer IS A REGISTERED TRADEMARK OF E.I. DU PONT DE NEMOURS AND CO. USED UNDER LICENSE.
(3) ELASTOMERS ALSO AVAILABLE IN AFLAS, BUNA-N, EPDM & FFKM
(4) SEAT: CS UNITS – WELDED
(5) AVAILABLE IN 316 SS; CONSULT FACTORY FOR ALT. MATERIALS.
Page 15
APPENDIX E: Model 1860A Pressure Relief Valve
Page 15 of 17
ITEM DESCRIPTION STANDARD MATERIALS OF CONSTRUCTION
ALUMINUM CARBON STL 316 SS
1 OUTLET AL(GR 356-T6) CS(GR WCB) 316 SS(GR CF-8M)
2 LOCK WASHER SS SS SS
3 HEX NUT SS SS SS
4 STUD SS SS SS
5 COVER AL(GR 356-T6) CS(GR WCB) 316 SS(GR CF-8M)
6 PRESSURE STEM 316 SS 316 SS 316 SS
7 * COVER GASKET PTFE PTFE PTFE
8 GUIDE ROD 316 SS 316 SS 316 SS
9 PRESSURE PALLET (1) (NOT SHOWN) 316 SS 316 SS 316 SS
10 * PRESSURE DIAPHRAGM, PRIMARY (2)(3) (NOT SHOWN) FEP FEP FEP
11 * PRESSURE DIAPHRAGM, BACKUP (2) (NOT SHOWN) FEP FEP FEP
12 PRESSURE RETAINER PLATE (NOT SHOWN) 316 SS 316 SS 316 SS
13 FLAT WASHER (NOT SHOWN) SS SS SS
14 HEX EXPANDING LOCK NUT (NOT SHOWN) SS SS SS
15 * INLET GASKET PTFE PTFE PTFE
16 LOCK WASHER SS SS SS
17 HEX NUT SS SS SS
18 STUD SS SS SS
19 INLET AL(GR 356-T6) CS(GR WCB) 316 SS(GR CF-8M)
20 PIPE PLUG 316 SS CS 316 SS
21 SEAT INSERT (6"-12" ONLY) (4) (NOT SHOWN) 316 SS 316 SS 316 SS
22 * O-RING (6"-12" ONLY) (3) (NOT SHOWN) FKM FKM FKM
23 SET SCREW (6"-12" ONLY) (NOT SHOWN) SS SS SS
24 SEAT INSERT (2"-4" ONLY) (4) (NOT SHOWN) N/A 316 SS N/A
25 PALLET WEIGHT (5) (NOT SHOWN) LEAD LEAD LEAD
* SPARE PARTS
(1) PALLET ALSO AVAILABLE IN ALUMINUM.
(2) Fluoropolymer IS A REGISTERED TRADEMARK OF E.I. DU PONT DE NEMOURS AND CO. USED UNDER LICENSE.
(3) ELASTOMERS ALSO AVAILABLE IN AFLAS, BUNA-N, EPDM & FFKM
(4) SEAT: CS UNITS – WELDED
(5) AVAILABLE IN 316 SS; CONSULT FACTORY FOR ALT. MATERIALS.
Page 16
APPENDIX F: Model 1870A Vacuum Relief Valve
Page 16 of 17
ITEM DESCRIPTION STANDARD MATERIALS OF CONSTRUCTION
ALUMINUM CARBON STL 316 SS
1 OUTLET AL(GR 356-T6) CS(GR WCB) 316 SS(GR CF-8M)
2 LOCK WASHER SS SS SS
3 HEX NUT SS SS SS
4 STUD SS SS SS
5 COVER AL(GR 356-T6) CS(GR WCB) 316 SS(GR CF-8M)
6 VACUUM STEM 316 SS 316 SS 316 SS
7 * COVER GASKET PTFE PTFE PTFE
8 GUIDE ROD 316 SS 316 SS 316 SS
9 PIPE PLUG 316 SS CS 316 SS
10 VACUUM PALLET (1) (NOT SHOWN) 316 SS 316 SS 316 SS
11 * VACUUM DIAPHRAGM, PRIMARY (2)(3) (NOT SHOWN) FEP FEP FEP
12 * VACUUM DIAPHRAGM, BACKUP (2) (NOT SHOWN) FEP FEP FEP
13 VACUUM RETAINER PLATE (NOT SHOWN) 316 SS 316 SS 316 SS
14 FLAT WASHER (NOT SHOWN) SS SS SS
15 HEX EXPANDING LOCK NUT (NOT SHOWN) SS SS SS
16 SEAT INSERT (8"-14" ONLY) (4) (NOT SHOWN) 316 SS 316 SS 316 SS
17 * O-RING (8"-14" ONLY) (3) (NOT SHOWN) FKM FKM FKM
18 SET SCREW (8"-14" ONLY) (NOT SHOWN) SS SS SS
19 VACUUM SCREEN ASSY, (OPTIONAL) 316 SS 316 SS 316 SS
20 SEAT INSERT (2"-6" ONLY) (4) (NOT SHOWN) N/A 316 SS N/A
21 PALLET WEIGHT (5) (NOT SHOWN) LEAD LEAD LEAD
* SPARE PARTS
(1) PALLET ALSO AVAILABLE IN ALUMINUM.
(2) Fluoropolymer IS A REGISTERED TRADEMARK OF E.I. DU PONT DE NEMOURS AND CO. USED UNDER LICENSE.
(3) ELASTOMERS ALSO AVAILABLE IN AFLAS, BUNA-N, EPDM & FFKM
(4) SEAT: CS UNITS – WELDED
(5) AVAILABLE IN 316 SS; CONSULT FACTORY FOR ALT. MATERIALS.
Page 17
Page 17 of 17
Loading...