Leading the way in pressure relief
technology.

Anderson Greenwood, Crosby & Varec Pressure
Relief Valves
The premier option for pressure relief valves, providing advanced, reliable andefficient overpressure protection.

2 | VALVES & CONTROLSPRESSURE RELIEF VALVESOVERVIEW
THE WORLD’S MOSTCOMPREHENSIVE PRODUCT LINE.
WITH THE LARGEST AND MOST
SOPHISTICATED FACILITIES FOR
STEAM, AIR, GAS AND LIQUID.
GLOBAL PERFORMANCE
Emerson is an industry leader inpressure relief valve technology. A
single point provider, we offer an
extensive product line for reliable
performance with lower valve
life-cycle costs. Our unmatchedengineering and technical expertiseprovides you with the pressure
management products, application
solutions and services that will
positively impact your business.
TEST FACILITIESOur Texas and Massachusetts
combined testing and development
facilities have been the catalyst incontinuing our 135 years of productdevelopment and industry leadership.

The engineering teams of Anderson
Greenwood, Crosby and Varec havedesigned testing equipment andprocedures that assure optimum
valve performance under all service
conditions. These facilities are used
for experimentation, testing andemissions on relief devices. Our
Texas facility also features cryogenic
testing capabilities down to -320°F[-196°C]. A recent upgrade to our
Texas facility included a 11,000
gallon liquid nitrogen storage tank,high pressure gas vessels, full liquid
testing capabilities and a large test
laboratory. It has also been approved
by ASME as a test facility to conduct
certified flow testing.

CONTENTS
Direct Spring Pressure
Relief Valves

4-6

Safety Valves

7-8High Pilot Operated
Pressure Relief Valves

8 - 10

Low Pilot Operated
Pressure Relief Valves

11 - 12

Tank Protection

12 - 15

Flame Arrestment

15 - 16

Blanketing Systems

17

Tank Accessories

17 - 18

Specialty Valves

18 - 19

Certifications

20

Nuclear Products

20

Sizing Software andService21

Selection Matrix

22 - 23OVERVIEW | 3

DIRECT SPRING OPERATED

ANDERSON GREENWOOD SERIES 60
PRESSURE RELIEF VALVE
Types 61 and 63B designed for low
and medium set pressure gas, vapor
and liquid or gas thermal relief
applications. Brass construction.
TECHNICAL DATA
Sizes:½" x 1" to ¾" x 1"
Orifices:
0.077 to 0.150 in2 [0.497 to 0.968 cm2]
Connections:
NPT
Temperature Range:-320 to 400°F [-196 to +205°C]
Set Pressures:
30 to 531 psig [2.07 to 36.6 barg]
Code:
ASME VIII
Request data sheet: VCTDS-00544

ANDERSON GREENWOOD SERIES 80
PRESSURE RELIEF VALVE
Types 81, 83 and 86 soft seat designfor premium seat tightness provides
repeatable leak-tight performance
before and after each relief cycle. Fulllift design with external adjustable
blowdown and replaceable soft seatsand seals. Allows higher operatingpressure. Gas, vapor and steam
service.

ANDERSON GREENWOOD SERIES 80
PRESSURE RELIEF VALVE (LIQUID)Type 81P soft seat design for liquid
service to ensure stability withno chatter. The trim is fully backpressure balanced without the use ofa bellows. Replaceable soft seats andseals.

TECHNICAL DATA
Sizes:

Orifices:½" x ¾" to 2" x 3"
Orifices:
0.049 to 1.287 in2 [0.316 to 8.303 cm2]
Connections:
NPT, Flanged
Temperature Range:-423 to +550°F [-253 to +288°C]
Set Pressures:
20 to 10,000 psig [1.40 to 689.5 barg]
Code:
ASME VIII
Request data sheet: VCTDS-00544

4 | VALVES & CONTROLSTECHNICAL DATA
Sizes:½" x ¾" to 2" x 3"
0.049 to 1.287 in2 [0.316 to 8.303 cm2]
Connections:
NPT, Flanged
Temperature Range:-65 to +400°F [-54 to +205°C]
Set Pressures:
50 to 6000 psig [3.45 to 413.7 barg]
Code:
ASME VIII
Request data sheet: VCTDS-00544

DIRECT SPRING OPERATEDCROSBY STYLES JOS-E AND JBS-E
PRESSURE RELIEF VALVES
Conventional and Balanced Bellows
Spring loaded pressure relief valves
built in accordance with API Standards
526 and 527 for air, gas, steam andvapor. Styles JLT-JOS-E and JLTJBSE for liquid service and two phaseapplications.

CROSBY STYLE JB-TD (“OVER T”)
PRESSURE RELIEF VALVE
Large orifice pressure relief valve
product line is an extension of API
Standard 526 designs for air, gas,steam and vapor applications.
The broad JB-TD product offering
represents an alternative to multiple,
smaller orifice relief valves.

TECHNICAL DATA
Sizes:TECHNICAL DATA
Sizes:

1" x 2" to 12" x 16"

10" x 14" to 20" x 24"

Orifices:

Orifices:

CROSBY SERIES 900 OMNI-TRIM®
PRESSURE RELIEF VALVE
Single trim design, fixed blowdown
design for medium flow of air, gas,steam, vapor, liquid and two phaseapplications. Full nozzle design.
Available with metal or O-ring seat
construction.
TECHNICAL DATA
Sizes:½" x 1" to 2" x 2"
Orifices:
0.074 to 0.503 in2 [0.477 to 3.25 cm2]

0.110 to 60.75 in [0.710 to 391.96 cm ]42.19 to 185.0 in [272.19 to 1193.55 cm ]Connections:

Inlet Ratings:

Inlet Ratings:

NPT, Flanged, Socket Weld

ANSI Class 150 to 2500

ANSI Class 300

Temperature Range:

Temperature Range:

Temperature Range:-450 to +750°F [-268 to +399°C]-450 to +1000°F [-268 to +538°C]-20 to +450°F [-29 to +232°C]

Set Pressures:

Set Pressures:

Set Pressures:

5 to 5000 psig [0.34 to 344.83 barg]

5 to 6000 psig [0.34 to 413 barg]

25 to 300 psig [1.72 to 20.69 barg]

Code:

Code:

Code:

ASME VIII [15 psig and above]

ASME VIII [15 psig and above]

ASME VIII

Request data sheet: VCTDS-00597

Request data sheet: VCTDS-00290

2

2

2

2

Request data sheet: VCTDS-00594

OVERVIEW | 5

DIRECT SPRING OPERATEDCROSBY SERIES 800
PRESSURE RELIEF VALVE
Adjustable blowdown design for
medium flow of air, gas, vapor andsteam applications. External precise
blowdown adjustment provides
shorter blowdown than the Series
900. Full nozzle design. Available withmetal or O-ring seat.

CROSBY SERIES BP OMNI-TRIM®
PRESSURE RELIEF VALVE
Balanced piston, single trim designfor gas, vapor and liquid applications
involving variable back pressure. Fullnozzle design with O-ring seat asstandard.

TECHNICAL DATA
Sizes:¾" x 1" and 1" x 1"¾" x 1" to 2" x 2"

0.074 and 0.110 in2 [0.477 and 0.71 cm2]

Orifices:
0.110 to 0.503 in2 [0.71 to 3.25 cm2]
Connections:
NPT, Flanged, Socket Weld
Temperature Range:-450 to +750°F [-268 to +399°C]
Set Pressures:
15 to 1500 psig [1.03 to 103.42 barg]
Code:
ASME VIII
Request data sheet: VCTDS-00594

TECHNICAL DATA
Sizes:
Orifices:
Connections:
NPT, Flanged
Temperature Range:-20 to +400°F [-28 to +204°C]
Set Pressures:
50 to 1500 psig [3.45 to 103.44 barg]
Code:
ASME VIII
Request data sheet: VCTDS-00594

CROSBY SERIES 82
PRESSURE RELIEF VALVE
Designed to provide premium
performance in the natural gas
market. The Series 82 has a rugged
construction designed specifically forhigh pressure multi stage natural gas
compressors. The Series 82 valve isdesigned to provide superior seating
performance using a Viton® o-ringseat. The 2-piece body design withreplaceable seat and seals reduce
downtime and maintenance costs overthe life of the valve.
TECHNICAL DATA
Sizes:¾" x 1" to 1" x 1"
Orifices:
D 0.127 in2 [0.819 cm2]
E 0.221 in2 [1.423 cm2]
Connections:
MNPT x FNPT
Temperature Range:-15°F to 400°F [-26°C to 204°C]
Set Pressures:
15 to 1500 psig [1.03 to 103 barg]
Code:
ASME VIII
Request data sheet: VCTDS-00806

6 | VALVES & CONTROLSDIRECT SPRING OPERATEDCROSBY STYLE HE ISOFLEX®
SAFETY VALVE (STEAM)High capacity safety valve for drum
service, saturated steam applications.
Two ring control and back pressureassist close design are standard.
ISOFLEX® seat design provides seattightness up to 95% of set pressure.
TECHNICAL DATA
Sizes:CROSBY STYLE HSJ
SAFETY VALVE (STEAM)
Full nozzle safety valve for saturated
and superheated steam service. Tworing control. Style HSJ-DOW withclosed bonnet and screwed cap for
Dowtherm service.
TECHNICAL DATA
Sizes:TECHNICAL DATA
Sizes:

1½" x 2" to 6" x 8"

1½" x 3" to 6" x 10"

2½" x 6" to 4" x 8"

Orifices:

Orifices:

0.307 to 11.045 in [1.98 to 71.25 cm ]2

1.840 to 7.070 in [11.87 to 45.61 cm ]Inlet Ratings:

Connections:ANSI Class 150 to 2500

ANSI Flanged or Butt Weld Inlet and
ANSI Flanged Outlet

Maximum Temperature:

Maximum Temperature:

Maximum Set Pressure:2

Saturated steam
Maximum Set Pressure:3000 psig [207 barg]
Code:
ASME I
Request data sheet: VCTDS-00595

2

1000°F [538°C]
2700 psig [186.2 barg]
Code:
ASME I and VIII
Request data sheet: VCTDS-00595

CROSBY STYLE HCI ISOFLEX®
SAFETY VALVE (STEAM)High capacity safety valve forsaturated and superheated steam
service. Two ring control and optional
restricted lift feature. ISOFLEX® seat
design provides seat tightness up to
95% of set pressure.

2

Orifices:
0.994 to 19.29 in2 [6.41 to 124.45 cm2]
Connections:ANSI Flanged or Butt Weld Inlet and
ANSI Flanged Outlet
Maximum Temperature:
1100°F [593°C]
Maximum Set Pressure:3000 psig [207 barg]
Code:
ASME I and VIII
Request data sheet: VCTDS-00595

OVERVIEW | 7

DIRECT SPRING OPERATEDHIGH PRESSURE PILOT OPERATEDCROSBY STYLE HSL
SAFETY VALVE (STEAM)
A full nozzle reaction type safetyvalve designed for saturated andsuperheated steam service. Twochoices of inlet flange ratings and asimplicity of design to facilitate ease ofmaintenance.

ANDERSON GREENWOOD SERIES 200
PRESSURE RELIEF VALVE
Non-flowing, pop action pilot operated
design principally intended forgas, vapor and many mixed phaseapplications. Suitable for severe
service where dirt, hydrates and highmoisture levels occur in the fluid
media.

TECHNICAL DATA
Sizes:

ANDERSON GREENWOOD SERIES 400
PRESSURE RELIEF VALVE
Non-flowing, modulating action
pilot operated design suitable forgas, liquid and many mixed phaseapplications, including dirty and/or
wet applications. Modulating action
eliminates destructive effects of“liquid hammer.” Lifts proportionallyaccording to demand.

1¼" to 6" [Dn 32 to150] flanged

TECHNICAL DATA
Sizes:

Pressure rating:1" x 2" to 10" x 14"

TECHNICAL DATA
Sizes:Up to 725 psig [50 barg]

Orifices:1" x 2" to 10" x 14"

Temperature rating:

0.110 to 63.50 in2 [0.710 to 409.7 cm2]

Orifices:

Up to 1000°F [538°C]

Inlet Ratings:

0.110 to 63.50 in2 [0.710 to 409.7 cm2]

Inlet ratings:

ANSI Class 150 to 2500

Inlet Ratings:

ASME Classes 300 and 600

Temperature Range:

ANSI Class 150 to 600

Outlet rating:-423 to +600°F [-253 to +315°C]

Temperature Range:

ASME Class 150

Set Pressures:-65 to +600°F [-54 to +315°C]
Set Pressures:Request data sheet: VCTDS-00595

25 to over 6170 psig [1.72 to over
425.52 barg]
Code:

Code:

ASME VIII
Request data sheet: VCTDS-00543

8 | VALVES & CONTROLS

15 to 1480 psig [1.03 to 102.0 barg]
ASME VIII
Request data sheet: VCTDS-00543

HIGH PRESSURE PILOT OPERATED

ANDERSON GREENWOOD
SERIES 400 ISO-DOME
PRESSURE RELIEF VALVE
Iso-Dome accessory for the Series
400 pilot provides protection of criticalpilot internals from highly viscousprocess media.

ANDERSON GREENWOOD SERIES 500
PRESSURE RELIEF VALVE
Unique, modulating action pilot
operated relief valve with soft seats
having the ability to handle hot water,
steam, hot hydrocarbon vapors or
liquids, using inert plastic soft goods.

ANDERSON GREENWOOD TYPE 727
PRESSURE RELIEF VALVE
Pop action pilot safety valve with metal
seated pilot valve and main valve
extends the use of pilot technology to
1000°F [538°C]. Suitable for steam orgas service.

TECHNICAL DATA
Sizes:TECHNICAL DATA
Sizes:TECHNICAL DATA
Sizes:

1" x 2" to 10" x 14"

1½" x 2" to 10" x 14"

2" x 3" to 8" x 10"

Orifices:

Orifices:

Orifices:

0.110 to 63.50 in [0.710 to 409.7 cm ]0.110 to 63.50 in [0.710 to 409.7 cm ]0.503 to 26.0 in2 [3.245 to 167.7 cm2]

Inlet Ratings:

Inlet Ratings:

Inlet Ratings:

ANSI Class 150 to 900

ANSI Class 150 to 600

ANSI Class 150 to 600

Temperature Range:

Temperature Range:

Temperature Range:-65 to +600°F [-54 to +260°C]-65 to +515°F [-54 to +268°C]

Up to 1000°F [538°C]

Set Pressures:

Set Pressures:Code:

15 to 1480 psig [1.03 to 102.0 barg]

15 to 720 psig [1.03 to 49.6 barg]

ASME VIII

Code:

Code:

ASME VIII

ASME VIII

Request data sheet: VCTDS-00543

Request data sheet: VCTDS-00543

2

2

2

2

Request data sheet: VCTDS-00543

OVERVIEW | 9

HIGH PRESSURE PILOT OPERATED

ANDERSON GREENWOOD SERIES 800
PRESSURE RELIEF VALVEHigh set pressure capability, nonflowing, modulating pilot operatedpressure relief valve design forpressures up to 6170 psig [425.52
barg]. Suitable for gas, liquid or mixed
phase lading fluids, including dirty
and/or wet services.
TECHNICAL DATA
Sizes:
1" x 2" to 4" x 6"
Orifices:
0.110 to 9.489 in2 [0.710 to 61.21 cm2]
Inlet Ratings:
ANSI Class 900 to 2500
Temperature Range:-65 to +600°F [-54 to +315°C]
Set Pressures:
1481 to 6170 psig [102.13 to 425.52
barg]
Code:

ANDERSON GREENWOOD
SERIES 5200
PRESSURE RELIEF VALVE
Developed specifically to serve
economizer applications requiringpressure relief under the stringent
requirements of ASME Section. This
unique and challenging application
requires premium performance on avalve that must have ASME Section I
certified capacities for both steam andwater. A modulating pilot operatedpressure relief valve is the ideal
solution to this difficult application.

ANDERSON GREENWOOD SERIES LCPPRESSURE RELIEF VALVE
Full bore, non-flowing pilot designfor gas and vapor service. Integral
field test connection and back flow
preventer are standard accessories in
a compact assembly.

TECHNICAL DATA
Sizes:

Temperature Range:

1½" x 2" to 4" x 6"
Orifices:
F 0.307 in2 (1.98 cm2) thru P 6.38 in2(41.16 cm2)
Inlet Ratings:
ANSI Class 150 to 2500

ASME VIII

Temperature Range:

Request data sheet: VCTDS-00543

Set Pressures:

Up to 1000°F [+538°C]
15 to 6250 psig [1.03 to 431 barg]
Code:
ASME I and VIII
Request data sheet: VCTDS-00803

10 | VALVES & CONTROLSTECHNICAL DATA
Sizes:
1" x 2" to 3" x 4"
Orifices:
0.785 to 7.069 in2 [5.065 to 45.6 cm2]
Inlet Ratings:
ANSI Class 150 to 900-20 to +400°F [-29 to +205°C]
Set Pressure Range:
25 to 2200 psig [1.72 to 151.72 barg]
Request data sheet: VCTDS-00254

LOW PRESSURE PILOT OPERATED

ANDERSON GREENWOOD TYPE 9300
PRESSURE AND VACUUM RELIEF
VALVEThe Type 9300 design is a full body
valve to pipe away the discharge ifnecessary and is balanced againstback pressure. This design can beused in the pilot operated pressure
relief mode and also provide pilot
operated vacuum relief.
TECHNICAL DATA
Sizes:

ANDERSON GREENWOOD TYPE 9200
PRESSURE AND VACUUM VENTThe Type 9200 design can be usedin the pilot operated pressure relief
mode and also provide weight loaded
or pilot operated vacuum relief. The
9200 vents directly to atmosphereand has no provision to pipe away thedischarge.

ANDERSON GREENWOOD TYPE 93
PRESSURE RELIEF VALVE
Introduced in 1968, this pilot operatedpressure relief valve is designed withelastomer seats and seals for gas
piping and chemical tank applications.

TECHNICAL DATA
Sizes:

Orifices:2" x 3" to 12" x 16"

Temperature Range:

TECHNICAL DATA
Sizes:
2" x 3" to 12" x 16"
2.29 to 84.0 in2 [14.77 to 541.93 cm2]

2" x 3" to 12" x 16"

Orifices:

Orifices:

3.35 to 113.0 in2 [21.61 to 729.03 cm2]

3.35 to 113.0 in2 [21.61 to 729.03 cm2]

Temperature Range:

Temperature Range:-320 to +200°F [-196 to +93°C]

3" wc to 50 psig [7.5 mbarg to
3.45 barg]-320 to +200°F [-196 to +93°C]

Pressure Range:

Code:

Pressure Range:

4" wc to 5 psig [-5.0 mbarg to 0.345
barg]

ASME VIII [15 psig and above]

Vacuum Range:

Request data sheet: VCTDS-00551

4" wc to 50 psig [10 mbarg to
3.45 barg]
Vacuum Range:-1 oz [-4.3 mbarg] full open weight
loadedVacuum Range:-2 in wc to -5 psig pilot operated[-5 mbarg to -0.345 barg]
Code:-1 oz [-4.3 mbarg] full open weight
loaded-260 to +300°F [-162 to +149°C]
Set Pressures:

Vacuum Range:-2 in wc to -5 psig pilot operated[-5.0 mbarg to -0.345 barg]
Request data sheet: VCTDS-00551

ASME VIII [15 psig and above]
Request data sheet: VCTDS-00551

OVERVIEW | 11

LOW PRESSURE PILOT OPERATEDTANK PROTECTION

ANDERSON GREENWOOD
SERIES MLCPPRESSURE RELIEF VALVE
Modulating Large Capacity Pilot Valvedesigned for gas and vapor service.
Internally sensed pilot operatedpressure relief valve in a simple, highperformance, cost effective design.

VAREC 2010B/2020B SERIESWEIGHT LOADED PRESSURE AND
VACUUM RELIEF VALVE
Protects tanks from damage ordeformation, minimizes emissions
to the environment, as well as
loss of product due to evaporation.
Designed for use on atmospheric andlow pressure storage tanks. Vent toatmosphere or pipe away models.

TECHNICAL DATA
Sizes:
2" x 3" to 6" x 8"
Orifices:
3.14 to 28.27 in2 [20.26 to 182.41 cm2]
Inlet Ratings:
ANSI Class 150
Temperature Range:-20 to +400°F [-29 to +204°C]
Set Pressure Range:
3 to 14.99 psig [0.207 to 1.03 barg]
Request data sheet: VCTDS-00257

TECHNICAL DATA
Sizes:TECHNICAL DATA
Sizes:
3500B/3600B

2" to 12"2" x 3" to 12" x 14"

2010B/2011B

2" to 12"3650B

2020B/2021B

2" x 3" to 12" x 14"

Connections:

Connections:ANSI Class 125 Flat Face Drilling(Aluminum),
ANSI Class 150 Raised or Flat Face
Drilling (Carbon SteelANSI Class 125 Flat Face Drilling(Aluminum)
ANSI Class 150 Raised or Flat Face
Drilling (Carbon Steeland Stainless Steel)and Stainless Steel)Temperature Range:

Temperature Range:-65 to +350°F [-54 to +177°C]-65 to +350°F [-54 to +177°C]
Pressure/Vacuum

Vacuum Setting Range:

Setting Range:

0.3 oz/in2 to 2 psig [1.29 mbarg to
0.14 barg]

0.3 oz/in2 to 2 psig [1.29 mbarg to
0.14 barg]

Request data sheet: VCTDS-00300

Request data sheet: VCTDS-00318

12 | VALVES & CONTROLSVAREC 3500B/3600B/3650B SERIESWEIGHT LOADED VACUUM RELIEF
VALVEDesigned to protect liquid storage
vessels, vapor recovery systems andprocess systems from excessive
vacuum. Designs available for tank top
mounting, side mounting as well as
for “in-line” applications.

TANK PROTECTIONVAREC 7100B SERIESWEIGHT LOADED PRESSURE RELIEF
VENT
Pressure relief valve designed
to protect atmospheric and low
pressure storage tanks from being
overpressured. Air cushion seating
design keeps the valve tightly sealed
until the pressure inside the tankapproaches the valve setting. Vent toatmosphere design.
TECHNICAL DATA
Sizes:VAREC 2440/2450 SERIESSPRING LOADED PRESSURE AND
VACUUM RELIEF VALVE
Designed for use on liquid storage
tanks, vessels and vapor recovery
systems where excess pressure
or vacuum may cause damage orpermanent deformation and leakageof product must be minimized. Vent toatmosphere or pipe away models.
TECHNICAL DATA
Sizes:
2440

2" to 12"2" to 12"2450

2" x 2" to 12" x 12"

Connections:

Connections:ANSI Class 125 Flat Face Drilling(Aluminum),

ANSI Class 125 Flat Face Drilling(Aluminum)

ANSI Class 150 Raised or Flat Face
Drilling (Carbon SteelANSI Class 150 Raised Face Drilling(Carbon Steel andand Stainless Steel)

Stainless Steel)Temperature Range:

Pressure Setting Range:-65 to +350°F [-54 to +177°C]

1 to 50 psig [0.07 to 3.5 barg]

Pressure Setting Range:

Vacuum Setting Range:

0.3 oz/in2 to 2 psig [1.29 mbarg to
0.14 barg]

0.7 to 14 oz/in2 [3.0 to 60 mbarg]

Request data sheet: VCTDS-00301

VAREC 4110A/3610/3660 SERIESSPRING LOADED VACUUM RELIEF
VALVEDesigned to protect tanks and vessels
from damage or deformation causedby changes in process pressure andvacuum conditions. Withstand thepressure of the stored product undernormal operating conditions. Designs
available for tank top mounting, side
mounting and “in-line” applications.
TECHNICAL DATA
Sizes:
4110A/3610

2" to 12"3660

2" x 2" to 12" x 12"

Connections:ANSI Class 125 Flat Face Drilling(Aluminum),
ANSI Class 150 Raised Face Drilling(Carbon Steel and Stainless Steel)
Relief Settings:
Up to 50 psig [3.5 barg]
Request data sheet: VCTDS-00316

Request data sheet: VCTDS-00314

OVERVIEW | 13

TANK PROTECTIONVAREC 711 SERIESSPRING LOADED PRESSURE RELIEF
VENT
Protects low and medium pressurestorage tanks, gas headers, process
vessels and waste gas collection
systems from being overpressured.

ANDERSON GREENWOOD TYPE 96A
WEIGHT LOADED VACUUM BREAKER
The 96A is a weight-loaded vacuum
breaker designed to compliment thepressure relief products, especiallywhen seeing high positive operatingpressures.

TECHNICAL DATA
Sizes:TECHNICAL DATA
Sizes:

2" to 12"4", 6", 8",12"Connections:Vacuum Setting:

ANSI Class 125 Flat Face Drilling(Aluminum)½ oz/in2 [2.2 mbarg] (standard)

ANSI Class 150 Raised Face Drilling(Carbon Steel and Stainless Steel)Temperature Range:-65 to +350°F [-54 to +177°C]
Pressure Setting Range:
0.5 to 50 psig [0.035 to 3.5 barg]
Request data sheet: VCTDS-00302

14 | VALVES & CONTROLS

1½ oz/in2 [6.6 mbarg] (optional)
Maximum Allowable
Positive Pressure:
Up to 85 psig [5.86 barg]
Request data sheet: VCTDS-00551

VAREC 7000 SERIESMUSHROOM (FREE) VENTFree vent relieves to atmosphereand commonly used to protect
atmospheric tanks containing nonvolatile liquids. Designed to minimize
back pressure and to bolt directly to a
standard flange on the tank top. May
also be mounted on a flame arrester.
TECHNICAL DATA
Sizes:
2" to 12"
Maximum Differential Pressure:1 psi [0.07 barg]
Connections:Bolts to standard ANSI Class 125 Flat
Face flange
Request data sheet: VCTDS-00307

FLAME ARRESTERTANK PROTECTIONVAREC 221 SERIESEMERGENCY PRESSURE RELIEF
MANWAY COVER
Provides emergency venting of low
pressure storage tanks and vessels
when exposed to abnormal internalpressure or vacuum beyond capabilityof the breather vent. Also allows quick
and easy access for tank inspection
and maintenance.

VAREC 4210A SERIESEMERGENCY PRESSURE VENT AND
MANWAY COVER
Designed to provide emergency
venting of low pressure storage tanks
and vessels. Protects the tank fromrupture. Vacuum relief option provides
additional vacuum protection.

TECHNICAL DATA
Sizes:

18", 20", 24"

18", 20", 24"
Connections:
Drilled to API 650 dimensions, Flat
Face flange standard.
Drilled to ANSI Class 150 dimensions,Flat Face flange optional.
Pressure Setting Range:
0.5 to 6 oz/in2 [2.15 to 25.86 mbarg]
Vacuum Setting Range:
0.5 to 1 oz/in2 [2.15 to 4.31 mbarg]
Request data sheet: VCTDS-00310

TECHNICAL DATA
Sizes:
Connections:
Drilled to ANSI Class 150 dimensions,Flat Face flange.
Drilled to API 650 dimensions, Flat
Face flange.

VAREC 5400A SERIESFLAME ARRESTERGroup “D”, end-of-line flame arrester
is designed to prevent propagation offlame from external sources into a
storage vessel.
TECHNICAL DATA
Sizes:
2" to 12" (Vertical Installation)
Connections:ANSI Class 125 Flat Face flange
Drilling (Aluminum),
ANSI Class 150 Raised Face flange
Drilling (Carbon Steel and StainlessSteel)

Pressure Setting Range:

Pressure Rating:2" wc to 2 psig [5 mbarg to 0.14 barg]

Leak proof to10 psig [0.69 barg]

Vacuum Setting Range:-1.4" to -20" wc [-3.5 to -49 mm wc]

Maximum Pressure
Differential:
1 psi [0.07 barg]

Request data sheet: VCTDS-00308

Approvals:
FM (Factory Mutual): all sizes,
all materials. UL (Underwriters
Laboratories) listed in all Aluminum
construction in 2", 3", 4". Refer toproduct data sheet for additional
information.
Request data sheet: VCTDS-00309

OVERVIEW | 15

FLAME ARRESTERVAREC 5000/5010 SERIESFLAME ARRESTERGroup “D” end-of-line flame arresters
used in gas piping systems andpetroleum storage tank roofs toprevent the propagation of a flame into
the system. Extendable bank designfor ease of maintenance.
TECHNICAL DATA
Sizes:
2" to 12"Connections:ANSI Class 125 Flat Face flange
Drilling (Aluminum)
ANSI Class 150 Raised Face flange
Drilling (Carbon Steeland Stainless Steel)Pressure Rating:Leak proof to 10 psig [0.69 barg]
Maximum Pressure Differential:
1 psi [0.07 barg]
Approvals:
5000 Series UL (Underwriters
Laboratories) listed in all Aluminum
construction in 2", 3", 4", 6" and 10"
sizes. (Vertical Installation)
5010 Series UL listed in all Aluminum
construction as above in 2", 3" and 4"
sizes. (Horizontal Installation) Referto product request data sheet: for
additional information.
Request data sheet: VCTDS-00315

16 | VALVES & CONTROLSVAREC 5810B/5820B
RELIEF VALVE WITH FLAME
ARRESTER
A combination of the 2010B/2020B
Series Pressure and Vacuum Relief
Valve and the 5000 Series Flame
Arrester. This unit combines thehigh flow capacity of the Relief Valvewith the easy-to-maintain extensiblebank Flame Arrester for maximum
protection and reliable operation.

VAREC 5910B/5920B SERIESRELIEF VALVE WITH FLAME
ARRESTER
A combination of the 2010B/2020B
Series Pressure and Vacuum Relief
Valve and the 5400A Series Flame
Arrester. This unit combines the highflow capacity of the Relief Valve withthe easy-to-maintain Flame Arrester
for maximum protection and reliable
operation.

Request data sheet: VCTDS-00192

Request data sheet: VCTDS-00161

TANK ACCESSORIESBLANKETING SYSTEMSANDERSON GREENWOODTANK BLANKETING REGULATORS
Tank Blanketing provides an inert
gas blanket over the liquid in aliquid storage tank. The Trans-Zero
Regulator is a pilot operated, domeloaded diaphragm type regulator
capable of reducing blanketing gas ina single step providing bubble-tightshut-off and low maintenance costs.
TECHNICAL DATA
Connections:

VAREC 180 SERIESDOUBLE PORT PRESSURE
REGULATOR
Provides upstream and downstream
control for use on vapor recovery
systems where sensitive control at low
pressures is required. “Double port”
design achieves a sensitivity of lessthan five percent.
TECHNICAL DATA
Sizes:
1" to 8"½", 1", 2" threaded (NPT) and flanged
ANSI 150, 300, 600

Connections:Temperature Range:

2" to 8":	Drilled to ASA 125 Flat Face
(Aluminum),-20 to +300°F [-29 to +149°C]
Maximum Inlet Pressure:
200 psig [14 barg]

1": NPT threaded	Drilled to ANSI Class 150
Raised Face (Carbon Steel)Blanket Pressure Range:

Pressure Sensing Line:0.5" wc to 6 psig [12.7 mm wc to
0.4 barg]

Pressure Setting Range:

180/181 2" NPT 186/187 1" NPT

VAREC 42 SERIESSAMPLING AND GAUGING HATCH
COVER
Designed to provide quick accessto tanks for product gauging,temperature measurement andsampling.
TECHNICAL DATA
Sizes:
4", 6", 8",10"Connections:ANSI Class 125 Flat Face flange
Drilling (Aluminum),
Welded Connection (Available on
standard carbon steel base only)
Working Pressure:
Up to 3 psig [0.207 barg]
Request data sheet: VCTDS-00313-0.4 to 20" wc [1 to 50 mbarg]
Request data sheet: VCTDS-01042

Request data sheet: VCTDS-00303

OVERVIEW | 17

TANK ACCESSORIESSPECIALTY VALVESVAREC 4310 SERIESSAMPLING AND GAUGING HATCH
COVER
Installed on tank roofs or roof flanges
to provide quick access for productgauging, temperature measurement
or sampling.

ANDERSON GREENWOOD TYPE RCRVRESERVE CAPACITY RELIEF VALVE
Designed to provide overpressure
protection on low pressure, lowtemperature storage tanks when alarge volume of vapor is generated
by unusual conditions. O-ring seatprovides bubble-tight performance to
95% of set pressure. Full open at set
pressure – no overpressure required
to achieve rated capacity.

TECHNICAL DATA
Sizes:
4", 8"
Connections:ANSI Class 125 Flat Face flange Drilling
Working Pressure:
Up to 3 psig [0.207 barg]
Request data sheet: VCTDS-00311

TECHNICAL DATA
Sizes:
24" and 36"
Flange Mounting:24" = 150# Class/ANSI 16.5,
36" = 25# Class/ANSI 16.1
Set Pressure Range:24": 1.5 to 5.0 psig [103 to 345 mbarg].
36": 1.5 to 3.0 psig [103 to 207 mbarg]
Request data sheet: VCTDS-01046

VAREC 220 SERIESROOF MANWAY COVER
Designed for use on tanks where quick
and easy personnel access is desired.
TECHNICAL DATA
Sizes:
18", 20", 24", 30", 36"
Materials:
Cast Iron, Aluminum, Carbon Steel or
316 Stainless Steel baseWorking Pressure: Up to 1 psig
[0.07 barg]
Request data sheet: VCTDS-00310
18 | VALVES & CONTROLSANDERSON GREENWOOD TYPE ITVINTERNAL TANK VALVE
Liquid storage - LNG, LPG, NH3,
LOX, etc. The Internal Tank Valve is a
fail-safe isolation valve for bottom andside withdrawal tanks.
Request data sheet: VCTDS-01047

SPECIALTY VALVESANDERSON GREENWOOD SSVSAFETY SELECTOR VALVE
Developed to provide a safe andefficient method of switching from anactive pressure relief valve to a standby pressure relief valve. The SSV hasless than 3% pressure drop to theactive API 526 PRV inlet in accordancewith ASME Code Section VIII and
API RP 520, Part II. Tandem Safety
Selector Valve systems are available
which allow positive and simultaneous
switching of both inlet and outlet
SSV’s while maintaining overpressure
protection at all times.
TECHNICAL DATA
Sizes:
1" to 10"
Pressure Class:“BLK” BLOCKBODYPRESSURE RELIEF VALVES
Originally designed for offshore
applications where set pressure
requirementsexceeded industry
standards. Available in most Crosby
and Anderson Greenwood Direct
Spring Operated and Pilot Operated
Pressure Relief Valve designs, theBlockBody will provide cost-effective
alternatives to multiple high pressure
smaller orifice relief valves. The
standard forged body construction
allows an extensive array of available
metallurgy options.
TECHNICAL DATA
Sizes:½" x ¾" to 8" x 10"
Set Pressures:
To 10,000 psig [689 barg]

ANSI Class 150 to 2500
Maximum Temperature:
800°F [426°C]
Request data sheet: VCTDS-00241

Contact your PVC sales representative
for more information

CROSBY STYLE PVR
PRESSURE/VACUUM RELIEF VALVE
Designed for the food & beverage andpharmaceutical industries, the PVR
relieves excess air or gas pressure,relieves excess liquid pressure in theabsence of air or gas blanketing andprevents formation of a vacuum that
could cause the vessel to buckle due
to external pressure.
TECHNICAL DATA
Sizes:
3" and 4"
Inlet Connections:
Lug Union Nut, ANSI flanged, Triclamp
Set Pressures:
14.5 to 125 psig [1 to 8.62 barg]
Vacuum Relief (typical):2" wc [5 mbarg]
Temperature Range:-15 to +400°F [+5 to +204°C]
Code:
ASME VIII [15 psig and above]
Request data sheet: VCTDS-00330

OVERVIEW | 19

CERTIFICATIONSNUCLEAR PRODUCTS

PRESSURE RELIEF VALVES(NUCLEAR)
Emerson designs and manufactures
pressure relief valves specifically tomeet the exacting requirements ofnuclear power plant applications built
to ASME Code Section III. Our productportfolio includes Style HB-BP
balanced design pressure relief valves
used in pressurized water reactors
throughout the world as well as Style
HB-BP-DF dual function safety valves
to meet special overpressure safety
requirements of boiling water reactor
primary loops. Style HA is intended forservice on pressurized water reactors
as the main steam safety valve.
Other designs include styles JMBWR, JO, JB, JWR-JO, JWR-JB, JMAK
and JRAK-BS for balance of plant
applications.

TESTING AND VERIFICATION DEVICESSPVD – SET PRESSURE VERIFICATION
DEVICEA system for in-site testing, classified
as a “calibrated assist device” per
ASME Performance Test Code (PTC25). Totally automatic – computer
driven system for testing safety valves.
Available in portable or permanently
mounted models.
VPI – VALVE POSITION INDICATOR
Provides direct, continuous, remoteindication of valve spindle position.
Permits safe monitoring of pressure
relief valves located in hostileenvironments. Transducer is qualified- Class 1E Standard system handles
up to 20 Linear Variable Differential
Transducers (LVDT) sensors. Qualified
to IEEE-344 for in-containment
service.
LISA – LIFT INDICATING SWITCHASSEMBLY
A valve position indicating device
with a movable permanent magnet
attached to the valve spindle. Fixed“reed” type switches are permanently
encased in epoxy in the switch
housing. Two sets of switches provide
redundancy, with each set consistingof three switches indicating valve
closed, mid and fully-open positions.
Qualified to IEEE-344.

20 | VALVES & CONTROLS• ASME Code Section I (V)• ASME Code Section VIII (UV)• Association of American
Railroads• Canadian Registration• European Community (EC)
Directive 94/9/EC• Factory Mutual• GGTN - GOSGORTEKHNADZOR of
RUSSIA• GOST (Russia)• National Board of Boiler &Pressure Vessel Inspectors• People’s Republic of China• Pressure Equipment Directive
97/23/EC• Type Approvals- ABS- Bureau Veritas (BV)
- Det Norske Veritas (DNV)- Nippon Kaiji Kyokai (NKK)• Underwriters Laboratory• EN ISO-4126

EMERSON PRV2SIZE
PRESSURE RELIEF DEVICE SIZING AND
SELECTION SOFTWARE
Emerson PRV2SIZE incorporates
over 135 years of experience andengineering expertise for an extensive
array of Anderson Greenwood, Crosby
and Varec pressure relief devices
and related products in one software
package. With Emerson PRV2SIZE
customers and engineers can address
numerous applications in a single
sizing and selection platform without
the need to use two or more sizing
programs.

• Fully configured product selection

EMERSON PRV2SIZE FEATURES:• Detailed product specifications
including cross sectional drawings
with dimensions and weights• Improved user interface– Sizing calculations can be saved at
any point– Multiple tags can be opened at one
time• Capability of sorting data using avariety of parameters• Industry standard sizing
methodologies• Drop-down boxes allow
instantaneous change of sizing
methodology from API to ASME andvice versa• Addition of 2:1 elliptical head tanks
for fire sizing applications• Catalog integration from existingproduct literature PDF’s– U.S. Customary System and Metricunits• Combination device, reaction force
and noise level calculations• Addition of flow curves for pressureand vacuum relief valves• Individual capsule summaries ofeach product including an image ofthe selected product
Another unique feature of Emerson
PRV2SIZE is its capability to provide
sizing and selection for tank protection
and tank blanketing products ina single software program. This
includes pad and de-pad valves, tank
blanketing regulators, pressure/vacuum vents and low pressure pilot
operated relief valves.

• Improved tools to export and importdevice tag numbers with the ability
to mail files directly from thesoftware program

SERVICE CAPABILITIESDelivering factory-trained teams ofmobile technicians 24/7/365, ourfleet of fully stocked service vehicles
allows us to work anywhere you needus - from the field to our own stateof-the-art production facilities. Our
pickup and delivery services assist
you with your service and repair needs
with minimal downtime. With a fleet ofservice vehicles and a trained team ofexpert technicians, Emerson provides
a wide range of aftermarket services
at customer locations. Some of the
products or activities addressed onsite
include:• Boiler Safety Valves(protecting the Drum, Superheater,
and Reheater)• Boiler Level Gauges(Direct Reading)• Pressure Relief Valves• Control Valves• Pump Protection Valves• Specialty Gate, Globe, and Check
Valves• Wellheads• Actuators and Controls• Commissioning• Nuclear Power Plant Services

OVERVIEW | 21

X

X

X

X

X

X

X

X

X

X

X

Modulating Action

Pressure Relief

X

Crosby Style JBS-E

Snap/Pop Action

Soft Seats

Crosby Style JOS-E

Vacuum Relief

Metal Seats

Fixed Blowdown

Adjustable Blowdown

ASME Section III

ASME Section I SteamASME Section VIII SteamASME Section VIII Liquid

ASME Section VIII Gas/Vapor

SELECTION MATRIXConventional and Balanced Bellows API 526 Valves

Crosby Style JOS-H-E

X

X

X

X

Crosby Style JLT-JOS-E

X

X

X

X

X

X

X

Crosby Style JLT-JBS-E

X

X

X

X

X

X

X

X

X

X

X

X

X

Portable/Threaded and Flanged Valves
Anderson Greenwood Series 60

X

Anderson Greenwood Series 80

X

X

X

Crosby Series 800

X

Crosby Series 900 OMNI-TRIM®

X

X

Crosby Series BP OMNI-TRIM®

X

X

Crosby Series 82

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

Safety Valves
Crosby Style HCI

X

X

X

X

X

Crosby Style HE

X

X

X

X

X

Crosby Style HSJ

X

X

X

X

X

Crosby Style HSL

X

X

X

X

X

High Pressure Pilot Operated Valves
Anderson Greenwood Series 200

X

Anderson Greenwood Series 400

X

X

Anderson Greenwood Series 500

X

X

Anderson Greenwood Series 700

X

Anderson Greenwood Series 800

X

X
X
X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X
X

Anderson Greenwood Series 5200

X

X

X

X

X

X

Low Pressure Pilot Operated Valves
Anderson Greenwood Series 90

X

X

X

X

Anderson Greenwood Series 9000

X

X

X

X

Anderson Greenwood 96A (Vacuum Breaker)

X

X

X

Large Orifice Relief Valves
Crosby Style JB-TD

22 | VALVES & CONTROLS

X

X

X

X

X

X

X

X

X

X
X

Y Style Pilot Operated

Right Angle Style Pilot Operated

Direct Spring Tank Blanketing

Downstream Control Regulator

Upstream Control Regulator

Sampling & Gauging Hatch CoverRoof Manway Cover

Flame Arrester (Horizontal Installation)

Flame Arrester (Vertical Installation)

Low Temperature Storage

Emergency Vacuum Relief Manway CoverEmergency Pressure Relief Manway Cover

Atmospheric Tank Venting

Spring Loaded Vacuum Relief

Spring Loaded Pressure Relief

Weight Loaded Vacuum Relief

Spring Loaded Pressure & Vacuum Relief

Weight Loaded Pressure & Vacuum Relief

Weight Loaded Pressure Relief

SELECTION MATRIX

Pressure/Vacuum Relief Valves
Varec 2010B/2020B Series

X

Varec 3500B/3600B/3650B Series

X

Varec 7100B Series

X

X

Varec 2440/2450 Series
Varec 4110A/3610/3660 Series

X
X

X

Varec 711 Series

X

Varec 7000 Series

X

Emergency Vents
Varec 221P Series

X

Varec 221PV Series

X

X

Varec 4210A Series

X

X

Anderson Greenwood RCRVX

Flame Arresters
Varec 5400A Series

X

Varec 5000 Series

X

Varec 5010 Series

X

Combination Relief Valve with Flame Arrester
Varec 5810B/5820B Series

X

X

Varec 5910B/5920B Series

X

X

Tank Accessories
Varec 220 Series

X

Varec 42 Series

X

Varec 4310 Series

X

Tank and Equipment Blanketing Systems
Varec Series 180/186
Varec Series 181/187

X
X

Anderson Greenwood Type BV-1
Anderson Greenwood Type RA
Anderson Greenwood Type Y1

XXX

OVERVIEW | 23

Pressure relief valves, providing advanced,
reliable and efficient overpressure
protection.

Emerson Electric Co.
Global Headquarters
8000 West Florissant Avenue
St. Louis, Missouri, 63136
United States
T +1 314 679 8984
ContactUs@Emerson.com
Emerson.com/FinalControl

Final Control
North America
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Marshalltown, Iowa, 50158
United States
T +1 641 754 3011

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LinkedIn.com/company/Emerson-Automation-Solutions
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Houston
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United States
T +1 281 477 4100
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United States
T +1 281 274 4400

© 2017 Emerson Electric Co. All rights reserved.
Anderson Greenwood, Crosby & Varec are marks owned by one of the companies in the Emerson Automation Solutions business unit of Emerson
Electric Co. The Emerson logo is a trademark and service mark of Emerson Electric Co. All other marks are property of their respective owners.
The contents of this publication are presented for information purposes only, and while effort has been made to ensure their accuracy, they are not
to be construed as warranties or guarantees, express or implied, regarding the products or services described herein or their use or applicability.
All sales are governed by our terms and conditions, which are available on request. We reserve the right to modify or improve the designs or
specifications of our products at any time without notice. Responsibility for proper selection, use and maintenance of any product or service remains
solely with the purchaser and end user.
VCPBR-00999-EN 17/07

Emerson Automation Solutions
World Area Headquarters
Asia Pacific
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T +65 6777 8211
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