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Best Hydraulic Relief Valves - Buying Guide

Last Updated: 01/22/2019

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  #1

Control Devices ST Series Brass ASME Safety Valve, 150 psi Set Pressure, 1/4" Male NPT

Model: ST25-1A150   |    Mpn: ST25-1A150   |    Ean: 0094700405128   |    PartNumber: ST25-1A150   |   Asin: B0081TJJDG

This Control Devices ST25-1A150 ASME safety valve has a brass body, a 150 psi relief pressure, a 1/4" male NPT threaded inlet connection, and a stainless steel pull ring for manual pressure relief. The valve's brass body, brass valve seat, and the zinc plated steel spring resist corrosion and can be used in operating temperatures up to 250 degrees F. The preset relief pressure is accurate to within +/- 3 percent and a silicon O-ring provides a leak-proof seal to within +/- 10 percent of the relief pressure. This safety valve is American Society of Mechanical Engineers (ASME) safety rated and displays the UV mark for pressure vessel safety valves. It also displays the NB mark for certification in accordance with NB-501, National Board Certification of Pressure Relief Devices. This safety valve has a 116 cubic feet per minute (CFM) flow rate and is suitable for low capacity pressure relief applications such as in home construction air compressors.

Relief valves remove excess pressure or vacuum from a system. The valve openings allow fluids or gases to escape to decrease pressure, and then close once the valve reaches the reseating pressure limit. They also relieve excess vacuum by opening to release a gas into the system and then closing after it reaches its low-pressure limit. Some relief valves have an adjustment mechanism to set the pressure where the valve opens, making it suitable for various applications. Relief valves are rated according to the volume of liquid or gas that can flow through them and the material that the valve is constructed from must be suitable for the fluid or gas, which may be corrosive or at an extreme temperature, in which it operates. Relief valves are used in a variety of applications, such as air compressors, petrochemical and chemical manufacturing, natural gas processing, and power generation.

Control Devices manufactures valves and other flow control devices. The company, founded in 1963, is headquartered in Fenton, MO.

Features

  • Relief pressure preset to 150 psi with flow rate of 136 cfm
  • 1/4 male NPT threaded inlet connection
  • Brass construction and stainless steel spring for corrosion resistance
  • 250 degrees F maximum temperature for use in high temperature applications
  • ASME safety rated with UV and NB marks
  • See more on Amazon...

Brand: Control Devices   |   Manufacturer: Control Devices

Item Dimensions: 1 x 1 x 5 inches (2.5 x 2.5 x 12.7 cm)   |   Package Dimensions: 0.5 x 1.8 x 4 inches (1.3 x 4.6 x 10.2 cm)

First Available: 2017-11-25

Amazon Price: $5.31 | as of 01/22/2019(1:25am pst)
Availibility: Usually ships in 24 hours
List Price: $5.31 | Used Price: $4.58

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  #2

Camco 10471/10473 3/4" Temperature and Pressure Relief Valve with 4" Epoxy-Coated Probe

Model: 10473   |    Mpn: 10473   |    Ean: 7262318347502   |    PartNumber: 10473   |   Asin: B000BQSINO

Camco s 3/4" Temperature and Pressure Valve with 4" Probe will help protect your RV or home water heater from excessive temperature and water pressure. It's factory set at 150 PSI and 210F. It features epoxy-coated probe to prevent corrosion buildup.

Features

  • 3/4" NPT connection
  • Factory set at 150 PSI and 210F
  • 4 probe
  • Brass body with stainless spring
  • Listed to ANSI Z21.22
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Brand: Unknown   |   Manufacturer: Camco

Item Dimensions: 11.38 x 3.63 x 1.5 inches (28.9 x 9.2 x 3.8 cm)   |   Package Dimensions: 2 x 3.5 x 11.3 inches (5.1 x 8.9 x 28.7 cm)

Amazon Price: $10.00 | as of 01/22/2019(1:25am pst)
Availibility: Usually ships in 24 hours
List Price: $18.26 | Used Price: $11.37

Warranty: 1 year against manufacturing defects

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  #3

Watts 0009257 25AUB-Z3, 0.75 Inch, bronz

Model: 0009257   |    Mpn: LF25AUB-Z3 3/4"   |    Ean: 0098268329704   |    PartNumber: LF25AUB-Z3 3/4"   |   Asin: B00CBIF9K0

The LF25AUB-Z3 Water Pressure Reducing Valve from Watts is used for commercial and residential applications. Designed to reduce incoming water pressure for protection of plumbing system components and to reduce water consumption, it is constructed of a Lead Free copper silicon alloy body and features a union inlet connection, integral stainless steel strainer, and high temperature resistant reinforced diaphragm for hot water. It has an adjustable pressure range and is serviceable in-line. The Series LF25AUB-Z3 is available with a variety of end connections including: threaded, solder, PEX, quick-connect and CPVC with both union and double union connections. Maximum Working Pressure: 300psi (21 bar), Adjustable Reduced Pressure Range: 25 to 75psi (172 to 517 kPa), Standard Pressure Setting: 50psi (344kPa).

Features

  • Lead Free copper silicon alloy body construction.
  • Versatile enough to use in commercial or residential applications.
  • Integral stainless steel strainer is removable for cleaning.
  • 3/4-inch NPT.
  • Maximum working pressure: 300 psi (21 bar), adjustable reduced pressure range: 25 to 75 psi (172 to 517 kPa), standard pressure setting: 50 psi (344 kPa).
  • See more on Amazon...

Brand: Watts   |   Manufacturer: APR Supply Co.

Item Dimensions: 6 x 3 x 6 inches (15.2 x 7.6 x 15.2 cm)   |   Package Dimensions: 3.3 x 7 x 8.3 inches (8.4 x 17.8 x 21.1 cm)

Amazon Price: $70.09 | as of 01/22/2019(1:25am pst)
Availibility: Usually ships in 1-2 business days
List Price: $72.15 | Used Price: $63.43

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  #4

Apollo Valve 10-400 Series Bronze Safety Relief Valve, ASME Hot Water, 30 psi Set Pressure, 3/4" NPT Male x Female - 1040705

Model: 1040705   |    Mpn: 1040705   |    Ean: 0670750493164   |    PartNumber: 1040705   |   Asin: B008835NQC

This Apollo Valve 10-400 series safety relief valve has a bronze body, a 30 pounds per square inch (psi) relief pressure, a 3/4" male National Pipe Thread (NPT) inlet connection, and a 3/4" female NPT outlet. The valve's body and nozzle are bronze for resistance to corrosion, the seat is silicone for resistance to high temperatures, and the spring is stainless steel for resistance to corrosion. The valve can be used in operating temperatures up to 250 degrees F. This safety valve is American Society of Mechanical Engineers (ASME) safety rated for Section IV hot water heating boilers and hydronic heating systems.

Relief valves remove excess pressure or vacuum from a system. The valve openings allow fluids or gases to escape to decrease pressure, and then close once the valve reaches the reseating pressure limit. They also relieve excess vacuum by opening to release a gas into the system and then closing after it reaches its low-pressure limit. Some relief valves have an adjustment mechanism to set the pressure where the valve opens, making it suitable for various applications. Relief valves are rated according to the volume of liquid or gas that can flow through them and the material that the valve is constructed from must be suitable for the fluid or gas, which may be corrosive or at an extreme temperature, in which it operates. Relief valves are used in a variety of applications, such as air compressors, petrochemical and chemical manufacturing, natural gas processing, and power generation.

Apollo Valves manufactures ball, mixing, and relief valves, actuators, water gauges, marine fittings, heating and plumbing products, and backflow prevention. The company, founded in 1928 and headquartered in Matthews, NC, meets international standard International Organization for Standardization (ISO)/IEC standard 17025:2005.

Features

  • Relief pressure preset of 30 psi for releasing excess pressure
  • 3/4 male NPT threaded inlet for connecting to a female NPT threaded connection
  • ASTM B584 bronze body and nozzle and stainless steel spring for corrosion resistance
  • 250 degrees F maximum temperature for use in high-temperature applications
  • ASME safety rated for Section IV water heating systems
  • See more on Amazon...

Brand: Apollo Valve   |   Manufacturer: Conbraco

Package Dimensions: 1.65 x 2 x 4.9 inches (4.2 x 5.1 x 12.4 cm)

Amazon Price: $16.72 | as of 01/22/2019(1:25am pst)
Availibility: Usually ships in 1-2 business days
List Price: $21.26

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  #5

Control Devices CR Series Brass Pressure Relief Valve, 0-100 psi Adjustable Pressure Range, 1/4" Male NPT

Model: CR25-100   |    Mpn: CR25-100   |    Ean: 0094700472113   |    PartNumber: CR25-100   |   Asin: B007GDY3CU

This Control Devices CR25-100 pressure relief valve has a brass body, an adjustable relief pressure, a 1/4" male NPT threaded inlet connection, and a fluorocarbon O-ring. The valve's brass body, brass valve seat, and the stainless steel poppet resist corrosion and can be used in operating temperatures up to 250 degrees F. The valve can be adjusted to open between 0 and 100 psi using the micrometer-style nylon knob. This safety valve has an 6 standard cubic feet per minute (SCFM) flow rate and is suitable for low flow pressure relief applications such as in tankless air compressors.

Relief valves remove excess pressure or vacuum from a system. The valve openings allow fluids or gases to escape to decrease pressure, and then close once the valve reaches the reseating pressure limit. They also relieve excess vacuum by opening to release a gas into the system and then closing after it reaches its low-pressure limit. Some relief valves have an adjustment mechanism to set the pressure where the valve opens, making it suitable for various applications. Relief valves are rated according to the volume of liquid or gas that can flow through them and the material that the valve is constructed from must be suitable for the fluid or gas, which may be corrosive or at an extreme temperature, in which it operates. Relief valves are used in a variety of applications, such as air compressors, petrochemical and chemical manufacturing, natural gas processing, and power generation.

Control Devices manufactures valves and other flow control devices. The company, founded in 1963, is headquartered in Fenton, MO.

Features

  • Relief pressure adjustable from 0 to 100 psi
  • 1/4 male NPT threaded inlet connection
  • Brass construction and stainless steel spring for corrosion resistance
  • Silicon O-ring provides leak-proof seal to within 10 percent of set pressure
  • Micrometer-style nylon knob for pressure relief adjustment
  • See more on Amazon...

Brand: Control Devices   |   Manufacturer: Control Devices

Item Dimensions: 1 x 1 x 5 inches (2.5 x 2.5 x 12.7 cm)   |   Package Dimensions: 0.8 x 3.7 x 5.4 inches (2.0 x 9.4 x 13.7 cm)

Amazon Price: $10.44 | as of 01/22/2019(1:25am pst)
Availibility: Usually ships in 24 hours
List Price: $10.44

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  #6

Control Devices ST Series Brass ASME Safety Valve, 200 psi Set Pressure, 1/4" Male NPT

Model: ST25-1A200   |    Mpn: ST25-1A200   |    Ean: 0094700412393   |    PartNumber: ST25-1A200   |   Asin: B0081TJKZI

This Control Devices ST25-1A200 ASME safety valve has a brass body, a 200 psi relief pressure, a 1/4" male NPT threaded inlet connection, and a stainless steel pull ring for manual pressure relief. The valve's brass body, brass valve seat, and the zinc plated steel spring resist corrosion and can be used in operating temperatures up to 250 degrees F. The preset relief pressure is accurate to within +/- 3 percent and a silicon O-ring provides a leak-proof seal to within +/- 10 percent of the relief pressure. This safety valve is American Society of Mechanical Engineers (ASME) safety rated and displays the UV mark for pressure vessel safety valves. It also displays the NB mark for certification in accordance with NB-501, National Board Certification of Pressure Relief Devices. This safety valve has a 178 cubic feet per minute (CFM) flow rate and is suitable for low capacity pressure relief applications such as in home construction air compressors.

Relief valves remove excess pressure or vacuum from a system. The valve openings allow fluids or gases to escape to decrease pressure, and then close once the valve reaches the reseating pressure limit. They also relieve excess vacuum by opening to release a gas into the system and then closing after it reaches its low-pressure limit. Some relief valves have an adjustment mechanism to set the pressure where the valve opens, making it suitable for various applications. Relief valves are rated according to the volume of liquid or gas that can flow through them and the material that the valve is constructed from must be suitable for the fluid or gas, which may be corrosive or at an extreme temperature, in which it operates. Relief valves are used in a variety of applications, such as air compressors, petrochemical and chemical manufacturing, natural gas processing, and power generation.

Control Devices manufactures valves and other flow control devices. The company, founded in 1963, is headquartered in Fenton, MO.

Features

  • Relief pressure preset to 200 psi with flow rate of 178 cfm
  • 1/4 male NPT threaded inlet connection
  • Brass construction and stainless steel spring for corrosion resistance
  • 250 degrees F maximum temperature for use in high temperature applications
  • ASME safety rated with UV and NB marks
  • See more on Amazon...

Brand: Control Devices   |   Manufacturer: Control Devices

Item Dimensions: 1 x 1 x 5 inches (2.5 x 2.5 x 12.7 cm)   |   Package Dimensions: 0.8 x 1.7 x 4.1 inches (2.0 x 4.3 x 10.4 cm)

Amazon Price: $5.69 | as of 01/22/2019(1:25am pst)
Availibility: Usually ships in 24 hours
List Price: $16.99 | Used Price: $3.97

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  #7

Control Devices NC Series Brass Non-Code Safety Valve, 25-200 psi Adjustable Pressure Range, 1/4" Male NPT

Model: NC25-1UK002   |    Mpn: NC25-1UK002   |    Ean: 0094700417541   |    PartNumber: NC25-1UK002   |   Asin: B007GDXT3O

This Control Devices NC25-1UK002 safety valve has a brass body, an adjustable relief pressure, a 1/4" male NPT threaded inlet connection, a silicon O-ring, and a stainless steel pull ring for manual pressure relief. The valve's brass body, brass valve seat, and the stainless steel spring and ball resist corrosion and can be used in operating temperatures up to 250 degrees F. The valve can be adjusted to open between 25 and 200 psi using the knurled adjustment screw and locking jam nut. This safety valve has an 80 standard cubic feet per minute (SCFM) flow rate and is suitable for high temperature pressure relief applications such as in air compressors.

Relief valves remove excess pressure or vacuum from a system. The valve openings allow fluids or gases to escape to decrease pressure, and then close once the valve reaches the reseating pressure limit. They also relieve excess vacuum by opening to release a gas into the system and then closing after it reaches its low-pressure limit. Some relief valves have an adjustment mechanism to set the pressure where the valve opens, making it suitable for various applications. Relief valves are rated according to the volume of liquid or gas that can flow through them and the material that the valve is constructed from must be suitable for the fluid or gas, which may be corrosive or at an extreme temperature, in which it operates. Relief valves are used in a variety of applications, such as air compressors, petrochemical and chemical manufacturing, natural gas processing, and power generation.

Control Devices manufactures valves and other flow control devices. The company, founded in 1963, is headquartered in Fenton, MO.

Features

  • Relief pressure adjustable from 25 to 200 psi
  • 1/4 male NPT threaded inlet connection
  • Brass construction and stainless steel spring for corrosion resistance
  • 250 degrees F maximum temperature for use in high temperature applications
  • Silicon O-ring provides leak-proof seal to within 10 percent of set pressure
  • See more on Amazon...

Brand: Control Devices   |   Manufacturer: Control Devices

Item Dimensions: 1 x 1 x 5 inches (2.5 x 2.5 x 12.7 cm)   |   Package Dimensions: 0.6 x 4.1 x 5 inches (1.5 x 10.4 x 12.7 cm)

Amazon Price: $7.37 | as of 01/22/2019(1:25am pst)
Availibility: Usually ships in 24 hours
List Price: $7.37

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  #8

Water Pressure Reducing Valve, 1/2 In.

Model: 110192   |    Mpn: FB38   |    Ean: 0071031834285   |    PartNumber: FB38   |   Asin: B018Z5FW7C

' Water Pressure Reducing Valve, Valve Type Standard, Strainer Yes, Material Brass, Pipe Size 1/2 In., Preset Pressure Settings 12 psi, Pressure Adjustment Range 10 to 25 psi, Connection Type NPT, Height 4-13/16 In., Length 3-1/16 In., Max. Temp. 225 Degrees F, Max. Pressure 125 psi '

Features

  • Price For: Each Pressure Adjustment Range: 10 to 25 psi Max. Temp.: 225 Degrees F Max. Pressure: 125 psi Material: Brass Item: Water Pressure Reducing Valve Valve Type: Standard Preset Pressure Settings: 12 psi Strainer: Yes Connection Type: NPT Pipe Size: 1/2" Length: 3-1/16" Height: 4-13/16" Country of Origin (subject to change): India
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Brand: Bell & Gossett   |   Manufacturer: BELL & GOSSETT

Item Dimensions: 3.7 x 3.8 x 5.9 inches (9.4 x 9.7 x 15.0 cm)   |   Package Dimensions: 3.7 x 3.8 x 5.8 inches (9.4 x 9.7 x 14.7 cm)

Amazon Price: $49.45 | as of 01/22/2019(1:25am pst)
Availibility: Usually ships in 1-2 business days
List Price: $54.92

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  #9

Control Devices ST Series Brass ASME Safety Valve, 60 psi Set Pressure, 1/4" Male NPT

Model: ST25-1A060   |    Mpn: ST25-1A060   |    Ean: 0094700412607   |    PartNumber: ST25-1A060   |   Asin: B0081TJHXI

This Control Devices ST25-1A060 ASME safety valve has a brass body, a 60 psi relief pressure, a 1/4" male NPT threaded inlet connection, and a stainless steel pull ring for manual pressure relief. The valve's brass body, brass valve seat, and the zinc plated steel spring resist corrosion and can be used in operating temperatures up to 250 degrees F. The preset relief pressure is accurate to within +/- 3 percent and a silicon O-ring provides a leak-proof seal to within 10 percent of the relief pressure. This safety valve is American Society of Mechanical Engineers (ASME) safety rated and displays the UV mark for pressure vessel safety valves. It also displays the NB mark for certification in accordance with NB-501, National Board Certification of Pressure Relief Devices. This safety valve has a 61 cubic feet per minute (CFM) flow rate and is suitable for low capacity pressure relief applications such as in home construction air compressors.

Relief valves remove excess pressure or vacuum from a system. The valve openings allow fluids or gases to escape to decrease pressure, and then close once the valve reaches the reseating pressure limit. They also relieve excess vacuum by opening to release a gas into the system and then closing after it reaches its low-pressure limit. Some relief valves have an adjustment mechanism to set the pressure where the valve opens, making it suitable for various applications. Relief valves are rated according to the volume of liquid or gas that can flow through them and the material that the valve is constructed from must be suitable for the fluid or gas, which may be corrosive or at an extreme temperature, in which it operates. Relief valves are used in a variety of applications, such as air compressors, petrochemical and chemical manufacturing, natural gas processing, and power generation.

Control Devices manufactures valves and other flow control devices. The company, founded in 1963, is headquartered in Fenton, MO.

Features

  • Relief pressure preset to 60 psi with flow rate of 61 cfm
  • 1/4 male NPT threaded inlet connection
  • Brass construction and stainless steel spring for corrosion resistance
  • 250 degrees F maximum temperature for use in high temperature applications
  • ASME safety rated with UV and NB marks
  • See more on Amazon...

Brand: Control Devices   |   Manufacturer: Control Devices

Item Dimensions: 1 x 1 x 5 inches (2.5 x 2.5 x 12.7 cm)   |   Package Dimensions: 0.31 x 0.59 x 4.49 inches (0.8 x 1.5 x 11.4 cm)

Amazon Price: $6.79 | as of 01/22/2019(1:25am pst)
Availibility: Usually ships in 24 hours
List Price: $7.47

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  #10

4" Sewer Relief Plug

 Ean: 0087935924199   |    PartNumber: 43511   |   Asin: B00KUKLR2A

4" Sewer Relief Plug

Features

Brand: EZ-Flo   |   Manufacturer: EZ-Flo

Item Dimensions: 2 x 4 x 2 inches (5.1 x 10.2 x 5.1 cm)   |   

Amazon Price: $3.02 | as of 01/22/2019(1:25am pst)
Availibility: Usually ships in 24 hours
List Price: $3.02

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  #11

Watts 342692 Boiler Valve 3/4" MPT, bronz

Model: 342692   |    Mpn: 342692   |    Ean: 0098268784206   |    PartNumber: 342692   |   Asin: B00GP6R7PY

Highlights: End 1 type: Male Handle type: Lever handle Connector length: 3/4" Relief pressure preset of 30 psi for releasing excess pressure

Features

Brand: Watts   |   Manufacturer: Watts

Item Dimensions: 2 x 2.3 x 3.1 inches (5.1 x 5.8 x 7.9 cm)   |   Package Dimensions: 1.9 x 2.3 x 3.4 inches (4.8 x 5.8 x 8.6 cm)

Amazon Price: $14.60 | as of 01/22/2019(1:25am pst)
Availibility:
List Price: $21.86

Warranty: NA

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  #12

Camco 10423 1/2" Temperature and Pressure Relief Valve with 4" Epoxy-Coated Probe

Model: 10423   |    Mpn: 10423   |    Ean: 0014717104234   |    PartNumber: 10423   |   Asin: B0006IX8AU

Camco s 1/2" Temperature and Pressure Valve with 4" Probe will help protect your RV water heater from excessive temperature and water pressure. It's factory set at 150 PSI and crafted with no gaskets and an epoxy-coated probe to prevent corrosion buildup.

Features

  • Protects water heaters from excessive water temperatures and pressure
  • Resistant to corrosion
  • Factory preset to 150 psi and 210 degrees Fahrenheit
  • 1/2 - 14 NPT male inlet; 1/2 - 14 NPT female outlet with 4 probe
  • CSA certified
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Brand: Unknown   |   Manufacturer: Camco

Item Dimensions: 1.6 x 3.63 x 11.38 inches (4.1 x 9.2 x 28.9 cm)   |   Package Dimensions: 2 x 3.4 x 10.9 inches (5.1 x 8.6 x 27.7 cm)

Amazon Price: $10.97 | as of 01/22/2019(1:25am pst)
Availibility: Usually ships in 24 hours
List Price: $22.69 | Used Price: $10.20

Warranty: 1 year against manufacturing defects

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  #13

Cash Acme 18821-0150 NCLX-5L Temperature & Pressure Relief Valve, 3/4"

Model: 18821-0150   |    Mpn: 18821-0150   |    Ean: 0697285188211   |    PartNumber: 18821-0150   |   Asin: B01ARE42I4

Cash acme nclx combination temperature and pressure relief valves are designed for the protection of water heaters and storage tanks. Cash acme nclx valves are designed to meet ansi Z21.22/csa 4.4 and asme boiler code section iv in most configurations (see certifications for details) and are ideal for all domestic water heater applications.

Features

  • The nclx Series relief valves feature a Cast Bronze body, Brass and stainless Steel internal parts, silicone seat disc, and stainless Steel pressure spring
  • Cash acme nclx valves are automatic and reseat after temperature or pressure relief
  • Valves with extended inlets: nclx-5l = 2-3/32. shank length measured from bottom of outlet. Element length 4. element lengths are not exact measurements
  • Every valve is tested for performance prior to shipping
  • The nclx valve incorporates an innovative white coat thermal element coating; an inert covering that provides isolation from mineral deposits and galvanic corrosion, offering years of safety protection
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Brand: Cash Acme   |   Manufacturer: Cash Acme

Item Dimensions: 1.5 x 2 x 8 inches (3.8 x 5.1 x 20.3 cm)   |   Package Dimensions: 1.5 x 2.2 x 7.3 inches (3.8 x 5.6 x 18.5 cm)

Amazon Price: $13.89 | as of 01/22/2019(1:25am pst)
Availibility: Usually ships in 24 hours
List Price: $18.17 | Used Price: $8.81

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  #14

Control Devices ST Series Brass ASME Safety Valve, 125 psi Set Pressure, 1/4" Male NPT

Model: ST25-1A125   |    Mpn: ST25-1A125   |    Ean: 0094700407337   |    PartNumber: ST25-1A125   |   Asin: B0081TJISW

This Control Devices ST25-1A125 ASME safety valve has a brass body, a 125 psi relief pressure, a 1/4" male NPT threaded inlet connection, and a stainless steel pull ring for manual pressure relief. The valve's brass body, brass valve seat, and the zinc plated steel spring resist corrosion and can be used in operating temperatures up to 250 degrees F. The preset relief pressure is accurate to within +/- 3 percent and a silicon O-ring provides a leak-proof seal to within +/- 10 percent of the relief pressure. This safety valve is American Society of Mechanical Engineers (ASME) safety rated and displays the UV mark for pressure vessel safety valves. It also displays the NB mark for certification in accordance with NB-501, National Board Certification of Pressure Relief Devices. This safety valve has a 116 cubic feet per minute (CFM) flow rate and is suitable for low capacity pressure relief applications such as in home construction air compressors.

Relief valves remove excess pressure or vacuum from a system. The valve openings allow fluids or gases to escape to decrease pressure, and then close once the valve reaches the reseating pressure limit. They also relieve excess vacuum by opening to release a gas into the system and then closing after it reaches its low-pressure limit. Some relief valves have an adjustment mechanism to set the pressure where the valve opens, making it suitable for various applications. Relief valves are rated according to the volume of liquid or gas that can flow through them and the material that the valve is constructed from must be suitable for the fluid or gas, which may be corrosive or at an extreme temperature, in which it operates. Relief valves are used in a variety of applications, such as air compressors, petrochemical and chemical manufacturing, natural gas processing, and power generation.

Control Devices manufactures valves and other flow control devices. The company, founded in 1963, is headquartered in Fenton, MO.

Features

  • Relief pressure preset to 125 psi with flow rate of 116 cfm
  • 1/4 male NPT threaded inlet connection
  • Brass construction and stainless steel spring for corrosion resistance
  • 250 degrees F maximum temperature for use in high temperature applications
  • ASME safety rated with UV and NB marks
  • See more on Amazon...

Brand: Control Devices   |   Manufacturer: Control Devices

Item Dimensions: 2 x 0.8 x 0.8 inches (5.1 x 2.0 x 2.0 cm)   |   Package Dimensions: 0.7 x 1.1 x 4.5 inches (1.8 x 2.8 x 11.4 cm)

Amazon Price: $5.14 | as of 01/22/2019(1:25am pst)
Availibility: Usually ships in 1-2 business days
List Price: $5.14

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  #15

Camco 10493 3/4" Temperature and Pressure Relief Valve with 4" Epoxy-Coated Probe - Extended Shank

Model: 10493   |    Mpn: 10493   |    Ean: 0014717104937   |    PartNumber: 10493   |   Asin: B0006IX8B4

Camco started in 1966 with one employee and one product. Today, over 40 years later, we have more than 350 employees, over 3,000 products and five manufacturing facilities to better serve our customers needs. Our home office is in Greensboro, North Carolina. We also have locations in Elkhart, Indiana; Portland, Oregon; Leominster, Massachusetts and our newest facility in Beilun, China.

Features

  • 3/4" inlet-outlet
  • Pressure setting of 150 psi
  • 2-1/2 probe length
  • All brass body
  • Stainless steel spring
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Brand: Camco   |   Manufacturer: Camco

Item Dimensions: 11.38 x 3.63 x 0.67 inches (28.9 x 9.2 x 1.7 cm)   |   Package Dimensions: 1.8 x 3.56 x 11.5 inches (4.6 x 9.0 x 29.2 cm)

Amazon Price: $11.94 | as of 01/22/2019(1:25am pst)
Availibility: Usually ships in 24 hours
List Price: $11.94

Warranty: N

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  #16

Control Devices ST25-1A175 ST Series Brass Soft Seat ASME Safety Valve, 175 psi Set Pressure, 1/4 Male NPT

Model: ST25-1A175   |    Mpn: ST25-1A175   |    PartNumber: ST25-1A175   |   Asin: B0142ALXTU

This Control Devices ST25-1A175 ASME safety valve has a brass body, a 175 psi relief pressure, a 1/4 inch male NPT threaded inlet connection, and a stainless steel pull ring for manual pressure relief. The valve's brass body, brass valve seat, and the zinc plated steel spring resist corrosion and can be used in operating temperatures up to 250 F. The preset relief pressure is accurate to within +/- 3 percent and a silicon O-ring provides a leak-proof seal to within +/- 10 percent of the relief pressure. This safety valve is American Society of Mechanical Engineers (ASME) safety rated and displays the UV mark for pressure vessel safety valves. It also displays the NB mark for certification in accordance with NB-501, National Board Certification of Pressure Relief Devices. This safety valve has a 157.2648 cubic feet per minute (CFM) flow rate and is suitable for pressure relief applications such as in home construction or industrial air compressors.

Features

  • Relief pressure preset to 175 psi with flow rate of 157 cfm
  • 1/4 NPT threaded inlet connection with Vibra-Seal threadlock
  • Brass construction and music wire spring for corrosion resistance
  • 250 F maximum temperature for use in high temperature applications
  • ASME safety rated with UV and NB marks
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Brand: Control Devices   |   Manufacturer: Control Devices

Item Dimensions: 1 x 1 x 2 inches (2.5 x 2.5 x 5.1 cm)   |   Package Dimensions: 0.79 x 2.36 x 5.2 inches (2.0 x 6.0 x 13.2 cm)

Amazon Price: $6.99 | as of 01/22/2019(1:25am pst)
Availibility: Usually ships in 24 hours
List Price: $8.30

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  #17

Zurn Wilkins Model 34-600XL 3/4" Water Pressure Reducing Brass Valve with Integral By-pass Check Valve and Strainer, FNPT Union x FNPT, Lead Free

Model: 34-600XL   |    Mpn: 34-600XL   |    Ean: 0612052029573   |    PartNumber: 34-600XL   |   Asin: B004NHMRZW

Reduces High Inlet Pressure To A Lower Outlet Pressure Spring Range 25 To 75 Psi Factory Set At 50 Psi Pressure Rated 300 Psi, Max. Temp. 180Made in: United States Dimensions: 2.6 X 5.7 X 5.5Brand: ZurnItem Weight: 2includes: Unit Instruction Guide

Features

  • Zurn-Wilkins 34-600XL 3/4" Bronze Pressure Reducing Valve, FNPT Union and FNPT Female Thread
  • All bronze body and bell housing provides durability and long life
  • Built-in bypass prevents buildup of excessive system pressure caused by thermal expansion
  • May be installed in any position
  • Serviceable in-line
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Brand: Zurn   |   Manufacturer: Zurn Industries

Item Dimensions: 2.6 x 5.5 x 5.7 inches (6.6 x 14.0 x 14.5 cm)   |   Package Dimensions: 2.7 x 5.8 x 5.9 inches (6.9 x 14.7 x 15.0 cm)

Amazon Price: $87.00 | as of 01/22/2019(1:25am pst)
Availibility: Usually ships in 3-4 business days
List Price: $87.00 | Used Price: $49.99

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  #18

Rheem SP8346 Temperature and Pressure Relief Valve with 3/4-Inch NPT

Model: SP8346   |    Mpn: SP8346   |    Ean: 0020352436364   |    PartNumber: SP8346   |   Asin: B009AX2ULU

Temperature and pressure relief valve (T&P) - long shank.

Features

  • Temperature and pressure relief valve (T&P) - long shank
  • Maximum temperature setting (deg. F): 210, maximum pressure setting (psi): 150, CSA capacity (BTU/hr): 105,000, inlet thread size - NPT (in.): 3/4
  • CSA
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Brand: Rheem   |   Manufacturer: Rheem

Item Dimensions: 0.2 x 1.2 x 1 inches (0.5 x 3.0 x 2.5 cm)   |   Package Dimensions: 0.7 x 1.2 x 10.1 inches (1.8 x 3.0 x 25.7 cm)

Amazon Price: $15.44 | as of 01/22/2019(1:25am pst)
Availibility: Usually ships in 24 hours
List Price: $17.12 | Used Price: $8.38

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  #19

SNS BV-02(Short) Brass Safety Valve, 125 Psi, 1/4" Male NPT

Model: 10268000064   |    Mpn: 10268000064   |    PartNumber: 10268000064   |   Asin: B07BB7KB1P

-The preset relief pressure is accurate to within +/- 3 percent and a silicon O-ring provides a leak-proof seal to within +/- 10 percent of the relief pressure.
-The valve's brass body, brass valve seat, and the zinc plated steel spring resist corrosion and can be used in operating temperatures up to 140 degrees F.
-Relief valves remove excess pressure or vacuum from a system.
-The valve openings allow fluids or gases to escape to decrease pressure, and then close once the valve reaches the reseating pressure limit.
-They also relieve excess vacuum by opening to release a gas into the system and then closing after it reaches its low-pressure limit.

Features

  • Relief pressure preset to Pop Up Valve 150 psi
  • Brass construction and stainless steel spring for corrosion resistance
  • 1/4 male NPT threaded inlet connection
  • Use NBR sealing ring to prevent valve leakage
  • Free shipping
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Brand: SNS   |   Manufacturer: China SNS Pneumatic Co.,Ltd

Item Dimensions: 0.71 x 0.79 x 2.4 inches (1.8 x 2.0 x 6.1 cm)   |   Package Dimensions: 0.79 x 2.4 x 4.02 inches (2.0 x 6.1 x 10.2 cm)

Amazon Price: $4.99 | as of 01/22/2019(1:25am pst)
Availibility: Usually ships in 24 hours
List Price: $4.99

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  #20

Kingston KSV10 Series Brass ASME-Code Low Profile Safety Valve, 125 psi Set Pressure, 1/4" NPT Male

Model: KSV10-2-125   |    Mpn: KSV10-2-125   |    PartNumber: KSV10-2-125   |   Asin: B006U4IM82

The Kingston Model KSV10 ASME Code Low Profile Safety Valve is an ASME Code Certified, precision machined valve with a soft seat. Compact in size yet providing high flow capacities, the Kingston Model KSV10 ASME Code Low Profile Safety Valve has been designed with the small air system in mind. All Brass construction and a resilient silicone disc provides a bubble-tight seal below reseating pressure. Bodies are stamped with both the UV and NB symbols. Set pressure range 50 to 275 psi (5 psi increments only). Maximum temperature 400 F.

Features

  • Brass Construction, ASTM B16
  • Bubble-tight seating below the re-seat pressure
  • Heavy duty construction for lasting performance
  • Stainless steel or music wire spring depending on set pressure
  • 125 psi Set Pressure
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Brand: Kingston Valves   |   Manufacturer: Kingston Valves

Package Dimensions: 1 x 1 x 2 inches (2.5 x 2.5 x 5.1 cm)

Amazon Price: $10.92 | as of 01/22/2019(1:25am pst)
Availibility: Usually ships in 24 hours
List Price: $10.92

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