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Compressed Air & Gas
Repeatable bubble-tight sealing performance
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Seetru Safety Relief Valves for Compressed Air & Gas
The compressed air and gas industry is the largest industry that Seetru serves, our products have been protecting compressed air and gas systems from overpressure for over 75 years. Compressed air and gas systems are used in a wide variety of industries, including manufacturing, construction, oil and gas, and transportation. Seetru safety relief valves are essential for protecting these systems from overpressure, which can cause catastrophic failure. Overpressure can be caused by a variety of factors, including equipment failure, human error, and natural disasters.
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Seetru safety relief valves are designed to open automatically and release pressure when they exceed a predetermined setpoint. This prevents the system from exceeding its pressure rating and potentially causing catastrophic failure. They are known for their reliability, accuracy, and durability. They are also certified to meet a wide range of international standards.
Quick Links:
Atmospheric Discharge Safety Relief Valves | Enclosed Discharge Safety Valves | Change-Over Valves
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The Seetru range of safety valves for compressed air and gas are compact, highly efficient, and incorporate the exclusive Tutchtite–seal technology for repeatable bubble-tight sealing performance: designed for applications including air/gas compressors, specialist gas plants, chemical equipment and piping, pressure vessels, thermal relief and medical gases etc.
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Safety Relief Valves suitable for the following industries/applications:​
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Air/gas compressors and pumps
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Technical gases and CO2 plants
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Chemical equipment and piping
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Pressure vessels/receivers and piping systems containing air or gases
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Thermal relief
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Rail Industry
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Medical gases
Atmospheric Safety Relief Valves for Compressed Air & Gas
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Design: Atmospheric Discharge
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Materials: Brass
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Inlet Connections: ¼” to 1” (depending on bore size)
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Pressure Range: 0.48 to 50.9 bar (depending on bore size)
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Design: Atmospheric Discharge
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Materials: Stainless Steel
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Inlet Connections: ¼” to 1/2”
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Pressure Range: 0.55 to 21.0 bar
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Atmospheric Discharge Safety Relief Valve
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Materials: Brass
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Bore Size: 8mm to 20mm
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Inlet Connections: 1/4" to 2" BSP, BSPT or NPT
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Set Pressures: 2 to 55 bar
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Design: Atmospheric Discharge
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Materials: Brass
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Inlet Connections: ¼” to 1/2”
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Pressure Range: 0.27 to 17.5 bar
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Design: Atmospheric Discharge
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Materials: Stainless Steel
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Inlet Connection: 1/4" to 1/2”
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Pressure Range: 0.27 to 17.5 bar
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Design: Atmospheric Discharge
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Materials: Brass or Aluminium
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Inlet Connections: 1" to 2"
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Pressure Range: 0.5 to 12.0 bar
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Design: Atmospheric Discharge
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Materials: Brass
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Inlet Connections: 2" BSP, BSPT or NPT and 2 1/2" BSPT
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Set Pressures: 2.80 to 9.40 bar
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Design: Atmospheric Discharge
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Materials: Brass
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Inlet Connections: 2” (or 2 ½” using adapter)
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Pressure Range: 2.8 to 9.4 bar (2.8 to 3.8, 4.3 to 4.5, 5.5 & 7.7 to 9.4 bar)
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Design: Atmospheric Discharge
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Materials: Brass
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Inlet Connections: 3/8” to ¾”
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Pressure Range: 20.6 to 134.5 bar
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Design: Atmospheric Discharge
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Materials: Brass & St. Steel
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Inlet Connections: 1/4” to 1/2”
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Pressure Range: 69.0 to 448.2 bar (3/8” and 1/2”) / 69.0 to 345.0 bar (1/4”)
Find more valves for compressed air & gas...
Enclosed Discharge Safety Relief Valves & Change-Over Valves
Enclosed Safety Relief Valves for Compressed Air & Gas
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Design: Enclosed Discharge. Dual-guided spindle and the Seetru Rock-Seal™ Technology
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Materials: Bronze
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Inlet Connections: 1/2" to 2 1/2" BSP female connections (1/2" to 2" BSP for LGS HI-FLOW)
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Pressure Range: 0.2 to 24 bar
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Design: Enclosed Discharge. Larger Outlets to enable Larger Flow
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Materials: Bronze
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Inlet Connections: 1/2" to 2 1/2" BSP female connections
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Pressure Range: 0.2 to 24 bar
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Design: Enclosed Discharge
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Materials: Bronze
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Inlet Connections: 3/8” to 2”
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Pressure Range: 0.32 to 55.2 bar
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Design: Enclosed Discharge
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Materials: Stainless Steel
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Inlet Connections: 3/8” to 2”
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Pressure Range: 6.6 to 55.2 bar
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Design: Enclosed Discharge
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Materials: Brass & PPS Plastic
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Inlet Connection: 1/4" to 1/2"
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Pressure Range: 0.3 to 13.2 bar
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Design: Enclosed Discharge
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Materials: Brass & PPS Plastic
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Inlet Connections: 1/2” to 3/4”
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Available Set Pressures: 7.0, 8.0, 9.3, 10.0, 10.5, 11.0, 11.5, 14.5 & 16.0 bar
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Design: Enclosed Discharge
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Materials: Brass inlet with either Bronze or
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Stainless Steel body. Metal to metal sealing
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Inlet Connections: 1/2" to 2" BSP, BSPT or NPT
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Pressure Range: 0.3 to 28.0 bar
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Design: Enclosed Discharge
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Materials: Stainless Steel
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Inlet Connection: 1/2” to 2” threaded connections (depending on valve bore size)
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Pressure Range: 0.3 to 28.0 bar (depending on valve bore size)
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Design: Enclosed Discharge
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Materials: Brass or Stainless Steel body an Stainless Steel inlets
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Inlet Connections: 3/8” to 1/2” threaded
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Pressure Range: 55.0 to 103.4 bar
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Design: Enclosed Discharge
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Materials: Brass or Stainless Steel body and Stainless Steel Inlets
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Inlet Connections: 3/8” to 1/2” Threaded Inlet Connections
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Pressure Range: 27 to 36 & 48.3 to 241.3 bar
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Design: Enclosed Discharge
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Materials: Stainless Steel
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Inlet Connections: 3/8” and 1/2”
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Pressure Range: 35.0 to 500.0 bar
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Design: Enclosed Discharge
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Materials: Bronze or Stainless Steel body
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Inlet Connections: 3/8” to 3/4” Threaded
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Pressure Range: 53.0 to 370.0 bar
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Design: Enclosed Discharge
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Materials: Stainless Steel
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Inlet Connections: 1/2” to 1” Tr-Clamp (depending on bore size)
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Pressure Range: 0.32 to 55.2 bar (depending on bore size) – Maximum
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12 bar for Steam Applications
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Design: Enclosed Discharge
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Materials: Stainless Steel
½” NPT, BSP & BSPT | 9/16” Cone & Thread | 3/4” Cone & Thread -
Pressure Range: 35.0 to 515 bar (9*605) / 35.0 to 1100 bar (9*6H5) *Maximum set pressure for steam is 85 bar
Find more valves for compressed air & gas...
Change-Over Valves
Seetru Change-Over Valves
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Materials of Construction: Stainless Steel
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Seal Material: P.T.F.E
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Maximum Safety Valve Set Pressure: 75.0 bar
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Temperature Range: -196°C to 200°C
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Materials of Construction: Stainless Steel with Mild Steel or Stainless Steel Internals
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Seal Material: Elastomer / P.T.F.E
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Maximum Safety valve Set Pressure: 65.0 bar
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Temperature Range: -30°C to 200°C (subject to seal material)
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System Connections: 1” to 1-1/2” BSP, BSPT, NPT, CL150 to CL600 & PN16 to PN100
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Valve Connections: ¾” to 1” BSP, BSPT, NPT (with or without orientators), CL150 to CL600 & PN16 to PN100
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Maximum Safety Valve Set Pressure: 100.0 bar
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Temperature Range : -196°C to 200°C