Safety, Relief & Pressure Reducing Valves

Pop Safety Valves vs. Relief Valves

There is a difference!

A Pop Safety Valve is used with gases, which include air and steam. Their design always includes a huddling chamber which utilizes the expansion forces of these gases to effect quick opening (“popping”) and closing actions. The difference between the opening and closing pressures is termed “blowdown”.

A Relief Valve is normally used for liquid service, although safety valves may also be used. Ordinarily, relief valves do not have an accentuated huddling chamber nor a regulator ring for varying or adjusting blowdown. Therefore, they operate with a relatively lazy motion, slowly opening as pressure increases and slowly closing as pressure decreases. Such relieving action affords suitable protection for vessels or systems where there is no need for instantaneous release of large volumes of fluids.

Kunkle Safety and Relief Valves

High Reliability Safety Relief Valves For Pressures To 6500 psi. Sizes 1/4H through 6H. All Types and Connections: Brass, Bronze, Aluminum, Steel and Alloys.

Kunkle Series 6252
Cast iron safety valve for steam or air. A.S.M.E. Standard – N.B. Certified. Pressure settings to 250#.

Kunkle Series 537
Cast iron or bronze safety valve for hot water heating boilers. A.S.M.E. Standard – N.B. Certified. Pressure settings to 160#.

Kunkle Series 6000
Bronze safety valve for steam, air, or gas. A.S.M.E. Standard – N.B. Certified. High capacity, side outlet.

When ordering, please specify: Series #, pressure setting, medium (steam, water, air), flanged or threaded connection, inlet/outlet sizes, body material, and orifice type.

Bell & Gossett ASME Hot Water Relief Valves

Bell & Gossett bronze ASME safety relief valves offer the highest BTUH rating available on the market for valves of their size. B&G ASME safety relief valves are available in a wide range of capacities to closely match the BTUH output range of hot water heating boilers, direct fired hot water heaters, heat exchangers and other pressure vessels.

Part # Type MBTUH Capacity Relief Setting PSIG  
1170-100 Bronze Body, (1H x 1H) 3060 100 Call... Add to Order
1170-125 Bronze Body, (1H x 1H) 3735 125 Call... Add to Order
1170-30 Bronze Body, (1H x 1H) 1170 30 Call... Add to Order
1170-50 Bronze Body, (1H x 1H) 1710 50 Call... Add to Order
1170-75 Bronze Body, (1H x 1H) 2385 75 Call... Add to Order
3301-30 Iron Body, (1.5H x 2H) 3300 30 Call... Add to Order
3301-50 Iron Body, (1.5H x 2H) 4900 50 Call... Add to Order
4100-30 Iron Body, (2H x 2H) 4100 30 Call... Add to Order
4100-50 Iron Body, (2H x 2H) 5990 50 Call... Add to Order
790-100 Bronze Body, (3/4H x 3/4H) 2075 100 Call... Add to Order
790-125 Bronze Body, (3/4H x 3/4H) 2535 125 Call... Add to Order
790-30 Bronze Body, (3/4H x 3/4H) 790 30 Call... Add to Order
790-50 Bronze Body, (3/4H x 3/4H) 1160 50 Call... Add to Order
790-75 Bronze Body, (3/4H x 3/4H) 1615 75 Call... Add to Order

Bell & Gossett ASME Safety Relief Valves

Bell & Gossett bronze ASME safety relief valves offer the highest BTUH rating available on the market for valves of their size. B&G ASME safety relief valves are available in a wide range of capacities to closely match the BTUH output range of hot water heating boilers, direct fired hot water heaters, heat exchangers and other pressure vessels.

ORDERING INFORMATION
Relief Setting PSIG BTU’s Per Hour Capacity
Bronze Body Iron Body
790 Series 1170 Series 3301 Series 4100 Series
30 790,000 1,170,000 3,300,000 4,100,000
36 900,000 1,330,000 3,800,000 4,600,000
45 1,065,000 1,575,000 4,500,000 5,515,000
50 1,160,000 1,710,000 4,900,000 5,990,000
75 1,615,000 2,385,000 -- --
100 2,075,000 3,060,000 -- --
125 2,535,000 3,735,000 -- --
Inlet 3/4" 1" 1-1/2" 2"
Outlet 3/4" 1" 2" 2"

Bell & Gossett Pressure Reducing Valves

Bell & Gossett B7-12 Reducing Valve

This low pressure reducing valve is equipped with a low inlet pressure check valve and removable strainer. It is suitable for use in buildings with a maximum of three floors.

Bell & Gossett B-38, FB-38, B-38TU, and FB-38TU Reducing Valves

These low pressure reducing valves are equipped with a low inlet pressure check valve and removable strainer. Models with an “F” prefix feature fastfill. Models ending in “TU” feature a 1/2" sweat/NPT union.

Part # Size Type PSI  
B-38 1/2" NPT 12 Call... Add to Order
B-38TU 1/2" Union NPT Sweat 12 Call... Add to Order
B7-12 3/4" NPT 12 Call... Add to Order
FB-38 1/2" NPT 12 Call... Add to Order
FB-38TU 1/2" Union NPT Sweat 12 Call... Add to Order

Bell & Gossett Dual-Unit Valves

Combine functions of reducing and relief valves. The B&G pressure reducing valve is coupled with the noncode relief valve, providing overpressure protection as well as the fill function.

ORDERING INFORMATION
ORDER # Component Valves Body Connections
Boiler Fill
8 AB Iron 1/2" NPT 1/2" NPT
B-38 Brass
8TU A8 Iron 1/2" Union NPT Sweat
B-38TU Brass
F-3 A3 1/2" NPT
FB-38
F-3TU A3 1/2" Union NPT Sweat
FB-38TU
F-8 A8 Iron 1/2" NPT
FB-38 Brass
F-8TU A8 Iron 1/2" Union NPT Sweat
FB-38TU Brass

Part # Dual-Unit Valves  
8 Pressure reducing and relief valves Call... Add to Order
8TU Pressure reducing and relief valves Call... Add to Order
F-3 Pressure reducing and relief valves Call... Add to Order
F-3TU Pressure reducing and relief valves Call... Add to Order
F-8 Pressure reducing and relief valves Call... Add to Order
F-8TU Pressure reducing and relief valves Call... Add to Order

Hoffman Series 2000 Pilot Operated Steam Regulators

The Hoffman Series 2000 Pressure Regulating Line includes 27 main valves, 14 pilot valves, various wells and 4 hardware kits. They are designed to meet a wide range of temperature, pressure and capacity requirements and provide accurate, dependable, low maintenance operation. Any model main valve can be used with any pilot valve or combination of pilot valves to provide complete flexibility to meet your various needs.

To Order Series 2000 Valves, Specify:

  1. Main Valve Model Number
  2. Size and Connection Type of Main Valve
  3. Port Type (Full, Normal or Reduced)
  4. Any Pilot Valve Styles needed
  5. Pilot Hardware Packages needed
SERIES 2000 MAIN VALVE ORDERING INFORMATION
MODEL # SIZES CONNECTION MAX PRESSURE
2100 1/2" to 2" Threaded 250 psig
2150 3/4" to 2" 30 psig
2200 2" to 6" Flanged 125 psig
2250 30 psig
2300 250 psig

Part # Pilot Handware Kit Sizes  
400638 Kit for temperature or solenoid pilots used separately 1/2" to 2" Call... Add to Order
400640 Kit for temperature or solenoid pilots used separately 2-1/2" to 6" Call... Add to Order
400641 Kit for spring or air pilots used separately 1/2" to 2" Call... Add to Order
400643 Kit for spring or air pilots used separately 2-1/2" to 6" Call... Add to Order
Part # Type Range Wells  
240 Pneumatic Temperature -20 to 240 F Copper (included) Call... Add to Order
AP-1A Air 1 : 1 Ratio - Call... Add to Order
AP-4A Air 1 : 4 Ratio - Call... Add to Order
SSP-12 Spring 0.5 to 12 psi - Call... Add to Order
SSP-225 Spring 40 to 225 psi - Call... Add to Order
SSP-50 Spring 2 to 50 psi - Call... Add to Order
STPA-400 Self-Contained Temperature 250 to 400 F Copper or 316 Stainless Steel Call... Add to Order
AM101-UP-1LF Self-Contained Temperature 50 to 200 F Copper or 316 Stainless Steel Call... Add to Order
AM100R-UP-1 Self-Contained Temperature 150 to 300 F Copper or 316 Stainless Steel Call... Add to Order
AM100C1070-UP-1LF Pneumatic Temperature 50 to 300 F Brass, 316SS, or Teflon Coated Copper Call... Add to Order
AM100C-UP-1LF Pneumatic Temperature 200 to 450 F Brass, 316SS, or Teflon Coated Copper Call... Add to Order
AM100-UP-1LF Solenoid 0 to 100 psi - Call... Add to Order
ACS150-03U-01A2-4 Solenoid 0 to 250 psi - Call... Add to Order

Hoffman Model 754 Self-Contained Pressure Reducing Valve

The Hoffman Model 754 is used for controlling steam pressure, where an accurate tight closing valve is required, on applications such as small sterilizers, cooking tables, heating coils, unit heaters and pressing machines. Single seated for dead-end or continuous service.

Part # Size Outlet Pressure  
403050 1/2" 0 to 10 psig Call... Add to Order
403051 1/2" 10 to 50 psig Call... Add to Order
403052 1/2" 40 to 100 psig Call... Add to Order
403053 3/4" 0 to 10 psig Call... Add to Order
403054 3/4" 10 to 50 psig Call... Add to Order
403055 3/4" 40 to 100 psig Call... Add to Order
403056 1" 0 to 10 psig Call... Add to Order
403057 1" 10 to 30 psig Call... Add to Order
403058 1" 30 to 50 psig Call... Add to Order
403059 1" 50 to 80 psig Call... Add to Order

Johnson Controls Pressure Activated Water Valve

These V46 flanged valves modulate water or glycol in liquid cooled refrigeration condensers. Direct acting valves open on a pressure rise. Reverse acting valves open on pressure decrease and are generally used for bypass or heat pump operation.

Reverse Acting Valves: Element: 30" capillary w/1/4" flare nut.

Part # Type Size Range PSI Element  
V46AA-1C Direct Acting, Std Refrigerants 3/8" NPT 70-260 30" cap w/1/4" flare nut conn. Call... Add to Order
V46AB-1C Direct Acting, Std Refrigerants 1/2" NPT 70-260 30" cap w/1/4" flare nut conn. Call... Add to Order
V46AC-1C Direct Acting, Std Refrigerants 3/4" NPT 70-260 30" cap w/1/4" flare nut conn. Call... Add to Order
V46AC-8C Direct Acting, Ammonia Serv 3/4" NPT 70-150 1/4" female npt Call... Add to Order
V46AD-1C Direct Acting, Std Refrigerants 1" NPT 70-260 30" cap w/1/4" flare nut conn. Call... Add to Order
V46AD-4C Direct Acting, Ammonia Serv 1" NPT 160-260 1/4" female npt Call... Add to Order
V46AE-1C Direct Acting, Std Refrigerants 1 1/4" NPT 70-260 30" cap w/1/4" flare nut conn. Call... Add to Order
V46AE-4C Direct Acting, Ammonia Serv 1 1/4" NPT 70-150 1/4" female npt Call... Add to Order
V46AR-1C Direct Acting, Std Refrigerants 1 1/2" FLG 70-260 30" cap w/1/4" flare nut conn. Call... Add to Order
V46AR-2C Direct Acting, Ammonia Serv 1 1/2" NPT 160-260 1/4" female npt Call... Add to Order
V46AS-1C Direct Acting, Std Refrigerants 2" FLG 70-170 1/4" male flare Call... Add to Order
V46AS-2C Direct Acting, Std Refrigerants 2" FLG 160-260 1/4" male flare Call... Add to Order
V46AS-3C Direct Acting, Ammonia Serv 2" FLG 70-150 1/4" female npt Call... Add to Order
V46AT-1C Direct Acting, Std Refrigerants 2 1/2" FLG 70-170 1/4" male flare Call... Add to Order
V46AT-2C Direct Acting, Std Refrigerants 2 1/2" FLG 160-260 1/4" male flare Call... Add to Order
V46AT-3C Direct Acting, Ammonia Serv 2 1/2" FLG 160-260 1/4" female npt Call... Add to Order
Part # Type Size Range-PSI  
V46NA-1C Reverse Acting 3/8" NPT 90-280 Call... Add to Order
V46NB-1C Reverse Acting 1/2" NPT 90-280 Call... Add to Order
V46NB-2C Reverse Acting 1/2" NPT 40-100 Call... Add to Order
V46NC-1C Reverse Acting 3/4" NPT 90-280 Call... Add to Order
V46NC-2C Reverse Acting 3/4" NPT 40-100 Call... Add to Order
V46ND-1C Reverse Acting 1" NPT 90-280 Call... Add to Order
V46ND-2C Reverse Acting 1" NPT 40-100 Call... Add to Order
V46NE-1C Reverse Acting 1 1/4" NPT 90-280 Call... Add to Order
V46NE-2C Reverse Acting 1 1/4" NPT 40-100 Call... Add to Order

Johnson Controls Companion Flanges and Gaskets


Part # Flanges and Gaskets Sizes  
KIT14A-612 Flange Kit 1-1/2" Call... Add to Order
KIT14A-613 Flange Kit 2" Call... Add to Order
KIT14A-614 Flange Kit 2-1/2" Call... Add to Order

Johnson Controls Navy NAVSEA Certified Valves

Navy or marine valves for salt water service are equipped with naval cast bronze bodies. Metal internal parts coming in contact with salt water are of monel.

Part # Size Flange Type Range PSI  
V46BR-2C 1 1/2" 4 Hole ASME 70-260 Call... Add to Order
V46BS-3C 2" 4 Hole ASME 70-170 Call... Add to Order
V46CJ-2C 1/2" Sweat 70-260 Call... Add to Order
V46CN-2C 3/4" 4 Hole Navy Flange 70-260 Call... Add to Order
V46CP-2C 1" 4 Hole Navy Flange 70-260 Call... Add to Order
V46CQ-2C 1 1/4" 4 Hole Navy Flange 70-260 Call... Add to Order
V46CR-2C 1 1/2" 6 Hole Navy 70-260 Call... Add to Order
V46CS-3C 2" 6 Hole Navy 70-170 Call... Add to Order
V46CS-4C 2" 6 Hole Navy 160-260 Call... Add to Order
V46CT-3C 2 1/2" 6 Hole Navy 70-170 Call... Add to Order
V46CT-4C 2 1/2" 6 Hole Navy 160-260 Call... Add to Order

Johnson Controls Maritime Valves

Element: 30" capillary w/sweat conn.

Part # Desc Size Range PSI  
V46BA-2C Maritime Valves 3/8" NPT 70-260 Call... Add to Order
V46BB-2C Maritime Valves 1/2" NPT 70-260 Call... Add to Order
V46BC-2C Maritime Valves 3/4" NPT 70-260 Call... Add to Order
V46BD-2C Maritime Valves 1" NPT 70-260 Call... Add to Order
V46BE-2C Maritime Valves 1 1/4" NPT 70-260 Call... Add to Order
V46BT-3C Maritime Valves 2 1/2" Flange 160-260 Call... Add to Order
ACH550-UH-08A8-4 Maritime Valves 2" Flange 160-260 Call... Add to Order

Spence Pilot-Operated Pressure Regulator

Spence offers the most complete line of interchangeable pilots and main valves to give you a custom-designed control system … at no extra cost!

With Spence, you can select from over 70 different pilots and 5 main valves to meet your exact control requirements. One size fits all sizes of main valves. By simply switching interchangeable pilots, one main valve can handle different control functions. Multiple control functions can be achieved by using two or more pilots on a single main valve.

Select from standard side or optional integral mountings and a wide choice of ratings and control ranges. Spence main valves are offered in iron, bronze or steel construction in 3/8'' through 12'' sizes.

Match functional and operating requirements of the Type ED Pressure Regulator with the Spence modular design concept.

Here’s how:

1. Choose a main valve to suit your operating conditions.

MAIN VALVES
Body Material IRON STEEL BRONZE
Size Range 3/8'' to 12'' 3/8'' to 10'' 3/8'' to 2''
Cv Range 0.5 to 1600 0.5 to 700 0.5 to 30
Max. Pressure Rating 250 PSIG 600 PSIG 250 PSIG
Max. Temperature Rating 450°F 750°F 450°F

2. Add one or more pilot valves to meet your functional needs.

PILOT VALVES
FUNCTION MODE TYPE OF CONTROL
Mechanical Pneumatic Electronic
Temperature Control Heating
Cooling
Pressure Control Reduction
Back
Differential
Vacuum
Temperature plus Pressure Heating
Cooling
On/Off Flow Control Auto Startup
Manual
Auto-trip
Level Control Liquid
Speed Control Pump Governor

Spence Water Pressure Reducing Valves

These regulators are designed for dead-end water pressure reduction service. Because of their quick response, they are ideally suited for installations— such as domestic water service—where flow is intermittent and changes rapidly. Due to their balanced design, they are insensitive to varying initial pressure.

Body Material Iron
Size Range 1'' to 6''
Cv Range 4.1 to 138
Reduced Pressure Range 10 to 80 PSIG
Max. Pressure Rating 200 PSIG
Max. Temperature Rating 200°F

Part # Valve Desc  
A/AN-FRZ2"-30' Spence Reducing Valve Call... Add to Order