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Safety Valves
Automatic overpressure relief protects vessels, piping, and personnel from catastrophic failure. Our ASME-stamped safety valves cover steam, gas, and liquid service across a wide range of set pressures and orifice sizes.
Filters 203 Results
203 items
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32 SERS LOCK-OUT VLV W/LOCK
Requires Quote
Available for Purchase
Subject to factory lead times
32 SERS LOCK-OUT VLV W/MUF
Requires Quote
Available for Purchase
Subject to factory lead times
40 SERIES INLINE MANUAL LOCKOUT VALVES NUMATICS
Save 20%$400.46
$321.65
Available for Purchase
Subject to factory lead times
40 SERS LOCK-OUT VLV.G-TAP
Save 20%$463.47
$372.26
Available for Purchase
Subject to factory lead times
40 SERS LOCK-OUT VLV.G-TAP
Save 20%$431.58
$346.65
Available for Purchase
Subject to factory lead times
40 SERS LOCKOUT VLV/G-TAPPED
Save 20%$619.07
$497.24
Available for Purchase
Subject to factory lead times
40 SERS LOCKOUT VLV/G-TAPPED
Save 20%$587.95
$472.24
Available for Purchase
Subject to factory lead times
42 SERS L/O VLV 3/4" W/MUFFLER
Save 20%$343.89
$276.21
Available for Purchase
Subject to factory lead times
42 SERS LOCK-OUT VLV 1" W/OPT
Requires Quote
Available for Purchase
Subject to factory lead times
42SER LOCKOUT VLV 1" W/MUFFLER
Save 20%$375.01
$301.21
Available for Purchase
Subject to factory lead times
42SER LOCKOUT VLV 1" W/MUFFLER
Requires Quote
Available for Purchase
Subject to factory lead times
3/2 directional safety valve, Series SV01. Industrial-air component for use in pneumatic systems on automated machinery. Used in industrial machinery, OEM equipment, and factory automation where compressed air drives a stage of the production cycle. Sold by us as a factory-authorized Aventics distributor.
Save 7%$1,290.56
$1,199.10
Available for Purchase
Subject to factory lead times
5/2 directional safety valve, Series SV01. Aventics pneumatic part used in OEM machine integration and air-power applications. Specified on industrial machinery, factory automation cells, and pneumatic-system installations. Sold by us as a factory-authorized Aventics distributor.
Save 7%$1,290.56
$1,199.10
Available for Purchase
Subject to factory lead times
5/2 directional safety valve, Series SV01. Pneumatic component for use in industrial automation and machine equipment. Specified on industrial machinery, factory automation cells, and pneumatic-system installations. Sold by us as a factory-authorized Aventics distributor.
Requires Quote
Available for Purchase
Subject to factory lead times
3/2 directional safety valve, Series SV03. Aventics pneumatic component for use in air-driven industrial equipment. Specified on industrial machinery, factory automation cells, and pneumatic-system installations. Sold by us as a factory-authorized Aventics distributor.
Save 7%$1,328.72
$1,234.56
Available for Purchase
Subject to factory lead times
3/2 directional safety valve, Series SV03. Compressed-air part used across automation, packaging, and material-handling machinery. Specified on industrial machinery, factory automation cells, and pneumatic-system installations. Sold by us as a factory-authorized Aventics distributor.
Save 7%$1,328.72
$1,234.56
Available for Purchase
Subject to factory lead times
5/2 directional safety valve, Series SV03. Pneumatic equipment component for industrial machinery and air-driven processes. Specified on industrial machinery, factory automation cells, and pneumatic-system installations. Sold by us as a factory-authorized Aventics distributor.
Save 7%$1,328.72
$1,234.56
Available for Purchase
Subject to factory lead times
5/2 directional safety valve, Series SV03. Air-system component used in industrial machinery, automation cells, and OEM equipment. Specified on industrial machinery, factory automation cells, and pneumatic-system installations. Sold by us as a factory-authorized Aventics distributor.
Save 7%$1,328.72
$1,234.56
Available for Purchase
Subject to factory lead times
3/2 directional safety valve, Series SV05. Pneumatic system part for OEM machine builds, automation cells, and air-driven equipment. Specified on industrial machinery, factory automation cells, and pneumatic-system installations. Sold by us as a factory-authorized Aventics distributor.
Save 7%$1,599.36
$1,486.02
Available for Purchase
Subject to factory lead times
3/2 directional safety valve, Series SV05. Industrial-air component for use in pneumatic systems on automated machinery. Specified on industrial machinery, factory automation cells, and pneumatic-system installations. Sold by us as a factory-authorized Aventics distributor.
Save 7%$1,599.36
$1,486.02
Available for Purchase
Subject to factory lead times
5/2 directional safety valve, Series SV05. Compressed-air component used in factory automation and machine-build pneumatics. Specified on industrial machinery, factory automation cells, and pneumatic-system installations. Sold by us as a factory-authorized Aventics distributor.
Save 7%$1,599.36
$1,486.02
Available for Purchase
Subject to factory lead times
5/2 directional safety valve, Series SV05. Pneumatic part for air-driven machinery, automation cells, and OEM equipment. Specified on industrial machinery, factory automation cells, and pneumatic-system installations. Sold by us as a factory-authorized Aventics distributor.
Save 7%$1,599.36
$1,486.02
Available for Purchase
Subject to factory lead times
3/2 directional safety valve, Series SV03-AS2. Pneumatic component for use in industrial automation and machine equipment. Used by machine builders integrating pneumatic subsystems into automated production equipment. Sold by us as a factory-authorized Aventics distributor.
Save 7%$1,494.64
$1,388.72
Available for Purchase
Subject to factory lead times
3/2-directional valve, Dual valve, IS12-PD series, size 1. Pneumatic directional valve providing extend-and-retract control of double-acting actuators. Configured with 3/2-way switching. Common on OEM machine builds, automated test rigs, and conveyor diverters where air-flow direction must be switched. Sold by us as a factory-authorized Aventics distributor.
Save 5%$1,425.09
$1,350.67
Available for Purchase
Subject to factory lead times
32 SERS LOCK-OUT VLV W/LOCK
Requires Quote
Available for Purchase
Subject to factory lead times
32 SERS LOCK-OUT VLV W/MUF
Requires Quote
Available for Purchase
Subject to factory lead times
40 SERIES INLINE MANUAL LOCKOUT VALVES NUMATICS
Save 20%$400.46
$321.65
Available for Purchase
Subject to factory lead times
40 SERS LOCK-OUT VLV.G-TAP
Save 20%$463.47
$372.26
Available for Purchase
Subject to factory lead times
40 SERS LOCK-OUT VLV.G-TAP
Save 20%$431.58
$346.65
Available for Purchase
Subject to factory lead times
40 SERS LOCKOUT VLV/G-TAPPED
Save 20%$619.07
$497.24
Available for Purchase
Subject to factory lead times
40 SERS LOCKOUT VLV/G-TAPPED
Save 20%$587.95
$472.24
Available for Purchase
Subject to factory lead times
42 SERS L/O VLV 3/4" W/MUFFLER
Save 20%$343.89
$276.21
Available for Purchase
Subject to factory lead times
42 SERS LOCK-OUT VLV 1" W/OPT
Requires Quote
Available for Purchase
Subject to factory lead times
42SER LOCKOUT VLV 1" W/MUFFLER
Save 20%$375.01
$301.21
Available for Purchase
Subject to factory lead times
42SER LOCKOUT VLV 1" W/MUFFLER
Requires Quote
Available for Purchase
Subject to factory lead times
3/2 directional safety valve, Series SV01. Industrial-air component for use in pneumatic systems on automated machinery. Used in industrial machinery, OEM equipment, and factory automation where compressed air drives a stage of the production cycle. Sold by us as a factory-authorized Aventics distributor.
Save 7%$1,290.56
$1,199.10
Available for Purchase
Subject to factory lead times
5/2 directional safety valve, Series SV01. Aventics pneumatic part used in OEM machine integration and air-power applications. Specified on industrial machinery, factory automation cells, and pneumatic-system installations. Sold by us as a factory-authorized Aventics distributor.
Save 7%$1,290.56
$1,199.10
Available for Purchase
Subject to factory lead times
5/2 directional safety valve, Series SV01. Pneumatic component for use in industrial automation and machine equipment. Specified on industrial machinery, factory automation cells, and pneumatic-system installations. Sold by us as a factory-authorized Aventics distributor.
Requires Quote
Available for Purchase
Subject to factory lead times
3/2 directional safety valve, Series SV03. Aventics pneumatic component for use in air-driven industrial equipment. Specified on industrial machinery, factory automation cells, and pneumatic-system installations. Sold by us as a factory-authorized Aventics distributor.
Save 7%$1,328.72
$1,234.56
Available for Purchase
Subject to factory lead times
3/2 directional safety valve, Series SV03. Compressed-air part used across automation, packaging, and material-handling machinery. Specified on industrial machinery, factory automation cells, and pneumatic-system installations. Sold by us as a factory-authorized Aventics distributor.
Save 7%$1,328.72
$1,234.56
Available for Purchase
Subject to factory lead times
5/2 directional safety valve, Series SV03. Pneumatic equipment component for industrial machinery and air-driven processes. Specified on industrial machinery, factory automation cells, and pneumatic-system installations. Sold by us as a factory-authorized Aventics distributor.
Save 7%$1,328.72
$1,234.56
Available for Purchase
Subject to factory lead times
5/2 directional safety valve, Series SV03. Air-system component used in industrial machinery, automation cells, and OEM equipment. Specified on industrial machinery, factory automation cells, and pneumatic-system installations. Sold by us as a factory-authorized Aventics distributor.
Save 7%$1,328.72
$1,234.56
Available for Purchase
Subject to factory lead times
3/2 directional safety valve, Series SV05. Pneumatic system part for OEM machine builds, automation cells, and air-driven equipment. Specified on industrial machinery, factory automation cells, and pneumatic-system installations. Sold by us as a factory-authorized Aventics distributor.
Save 7%$1,599.36
$1,486.02
Available for Purchase
Subject to factory lead times
3/2 directional safety valve, Series SV05. Industrial-air component for use in pneumatic systems on automated machinery. Specified on industrial machinery, factory automation cells, and pneumatic-system installations. Sold by us as a factory-authorized Aventics distributor.
Save 7%$1,599.36
$1,486.02
Available for Purchase
Subject to factory lead times
5/2 directional safety valve, Series SV05. Compressed-air component used in factory automation and machine-build pneumatics. Specified on industrial machinery, factory automation cells, and pneumatic-system installations. Sold by us as a factory-authorized Aventics distributor.
Save 7%$1,599.36
$1,486.02
Available for Purchase
Subject to factory lead times
5/2 directional safety valve, Series SV05. Pneumatic part for air-driven machinery, automation cells, and OEM equipment. Specified on industrial machinery, factory automation cells, and pneumatic-system installations. Sold by us as a factory-authorized Aventics distributor.
Save 7%$1,599.36
$1,486.02
Available for Purchase
Subject to factory lead times
3/2 directional safety valve, Series SV03-AS2. Pneumatic component for use in industrial automation and machine equipment. Used by machine builders integrating pneumatic subsystems into automated production equipment. Sold by us as a factory-authorized Aventics distributor.
Save 7%$1,494.64
$1,388.72
Available for Purchase
Subject to factory lead times
3/2-directional valve, Dual valve, IS12-PD series, size 1. Pneumatic directional valve providing extend-and-retract control of double-acting actuators. Configured with 3/2-way switching. Common on OEM machine builds, automated test rigs, and conveyor diverters where air-flow direction must be switched. Sold by us as a factory-authorized Aventics distributor.
Save 5%$1,425.09
$1,350.67
Available for Purchase
Subject to factory lead times
FAQ
- Safety valves are for compressible fluids; they pop open suddenly to dump steam or gas fast (per API 520 Part I). Relief valves are for liquids; they open gradually in proportion to overpressure. Safety relief valves combine both. The mechanism design is different but the function is the same: protect the system from overpressure. Code-stamped valves carry the UV (vessels) or V (boilers) symbol from National Board.
- ASME BPVC Section VIII requires periodic recertification depending on service severity (typically 1 to 5 years). Boilers under Section I usually require annual testing per state boiler code. The National Board NB-23 (Inspection Code) governs repair and recertification. Fouling service or fire-side traps shorten the interval. The replacement cost of a misbehaving safety valve is tiny compared to a vessel rupture, so most plants test more often than the code minimum. Safety note: safety valve testing and repair must be done by a National Board VR-certified shop.
- ASME Section VIII vessels typically require recertification every 1 to 5 years depending on service severity. Boilers under Section I usually require annual testing. Fouling service or fire-side traps shorten the interval. The replacement cost of a misbehaving safety valve is tiny compared to a vessel rupture, so most plants test more often than the code minimum.
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About NISCO Inc.
NISCO offers a wide range of pressure gauges & instruments, diaphragm seals, thermometers, valves, and flow control products to the industrial and commercial marketplaces, as well as other resellers like ourselves. We can also provide other value-added services such as gauge repair, NIST traceable calibration, diaphragm seal assembly, and valve automation. NISCO takes pride in providing extensive product knowledge, helpful customer service, and market competitive pricing to help fit whatever need you may have because it is our goal to be regarded by our customers as the best supplier of pressure, temperature, and flow control products.