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Home > Industrial Products > Check & Safety Valves for Air Compressors

We are a leading manufacturer of high quality valves serving the compressed air, pressure washer, automotive, fluid power, fire protection, specialty gas, and pneumatic industries.

Types of Valves

The types of valves we carry include, but are not limited to:

  • ASME Safety Valves
  • In-Tank Check Valves
  • In-Line Cast Brass Check Valves

The Model “ST” safety valve is our standard safety valve for small air compressor systems and related applications. Even though the size is compact, flow capacities are high.

Resilient rubber pad, offered in silicone or flourocarbon, insures valve is bubble-tight to within 10% of set pressure. Three inlet sizes are available: 1/8″ NPT, 1/4″ NPT, and 3/8″ NPT.

All brass construction with zinc-plated music wire spring. Stamped with “UV” and “NB” symbols. Available set pressure range 25 PSI to 250 PSI. Set pressure tolerance +3% of set pressure. 250°F max. temperature.

Model Number
Inlet Size
Set Pressure Range
Weight
1/8″ NPT
25-300 PSIG
2.0 oz.
1/4″ NPT
25-350 PSIG
2.0 oz.
3/8″ NPT
25-300 PSIG
2.0 oz.

Model “SA” ASME safety valves are designed for high temperature applications such as intercoolers and aftercoolers where a compact size is required.

All brass construction with stainless steel spring and stainless steel ball seating on brass seat. Three inlet sizes available: 1/8″ NPT, 1/4″ NPT, 3/8″ NPT.

Stamped with “UV” and “NB” symbols. Available set pressure range 50 PSI to 350 PSI. Set pressure tolerance +3% of set pressure. 350°F max. temperature.

Model Number
Inlet Size
Set Pressure Range
Weight
1/4″ NPT
50-350 PSIG
2.5 oz.

Model “SV” ASME safety valves are designed for systems where large flow capacities are needed. Resilient pad insures valve is bubble-tight to within 10% of set pressure. Inlet size: 1/2″ NPT.

All brass construction with zinc-plated music wire spring and a rubber seal, offered in silicone or flourocarbon. Stamped with “UV” and “NB” symbols. Set pressure tolerance +3% of set pressure. 250°F max. temperature.

Model Number
Inlet Size
Set Pressure Range
Weight
1/2″ NPT
50-250 PSIG
6.0 oz.

Model “SN” ASME safety valves are designed for high temperature applications where large flow capacities are needed.

All brass construction with stainless steel spring and stainless steel ball seating on brass seat. Inlet size: 1/2″ NPT. Stamped with “UV” and “NB” symbols. Available set pressure range 50 PSI to 350 PSI. Set pressure tolerance +3% of set pressure. 350°F max. temperature.

Model Number
Inlet Size
Set Pressure Range
Weight
1/2″ NPT
50-250 PSIG
6.0 oz.

Model “SB” safety valves offer Control Devices value to users of high capacity ASME safety valves. Unique O-ring seal insures valve is bubble-tight to within 10% of set pressure. 1/2″ NPT and 3/4″ NPT inlets available.

All brass construction with stainless steel springs. O-ring seal available in silicone or fluorocarbon rubber. Available set pressure range 25 PSI to 300 PSI. Set pressure tolerance + 3% of set pressure. 250°F max. temperature.

Model Number
Inlet Size
Set Pressure Range
Weight
1/2″ NPT
25-200 PSIG
10.0 oz.
3/4″ NPT
30-250 PSIG
10.0 oz.

The model “SW” valve is our highest capacity ASME safety valve. Unique O-ring seal insures valve is bubble-tight to within 10% of set pressure. 1″ NPT and 1¼” NPT inlets available.

All brass construction with stainless steel springs. O-ring seal available in silicone or fluorocarbon rubber. Stamped with “UV” and “NB” symbols. Available set pressure range 25 PSI to 300 PSI. Set pressure tolerance +3% of set pressure. 250°F max. temperature.

Model Number
Inlet Size
Set Pressure Range
Weight
1″ NPT
25-300 PSIG
1.75 lbs.
1¼” NPT
125-200 PSIG
2 lbs.

The Super-Chek® design has been proven over the last 15 years to be the standard for air compressor in-tank check valves. One-piece brass bodies, stainless steel springs, and glass-filled fluoropolymer poppets all add up to long term reliability, while the eight discharge holes insure quiet operation. 

Valves may be disassembled for cleaning or repair. Valves are 100% tested for backflow leakage performance. 450 PSI max pressure, 400 deg. F max temperature.

Compression Fitting Inlet Valves

Model Number
Tube Comp. Inlet
M.P.T. Outlet
Max Flow Rate
Weight
3/8″
1/2″
20 SCFM
4.2 oz.
1/2″
1/2″
20 SCFM
4.3 oz.
3/4″
3/4″
30 SCFM
7.4 oz.
3/4″
1″
60 SCFM
11.5 oz.

Female Pipe Thread Inlet Valves

Model Number
F.P.T. Inlet
M.P.T. Outlet
Max Flow Rate
Weight
3/8″
3/8″
12 SCFM
3 oz.
3/8″
1/2″
20 SCFM
3.8 oz.
1/2″
1/2″
20 SCFM
5.5 oz.
1/2″
3/4″
30 SCFM
6.5 oz.
3/4″
3/4″
30 SCFM
7.2 oz.
3/4″
1″
60 SCFM
11.4 oz.
3/4″
1 1/2″
150 SCFM
24 oz.
1″
1″
60 SCFM
12.5 oz.
1 1/4″
1 1/4″
130 SCFM
17.5 oz.
1 1/2″
1 1/2″
150 SCFM
30 oz.

These cast-brass check valves have been specifically designed for installation into air compressor discharge lines. Extra-heavy walled cast brass bodies, glass-filled fluoropolymer poppets, and stainless springs resist corrosion and insure long life.

A plugged, 1/8″ NTP unloader port is standard. 250 PSI maximum pressure, 450°F maximum temperature.

Model Number
Connection Size
Max Flow Rate
Weight
1/8″ NPT
12 SCFM
6.0 oz.
1/4″ NPT
12 SCFM
6.0 oz.
3/8″ NPT
22 SCFM
9.0 oz.
1/2″ NPT
38 SCFM
13.0 oz.
3/4″ NPT
60 SCFM
1.25 lbs.
1″ NPT
115 SCFM
1.75 lbs.
1 1/4″ NPT
160 SCFM
2.5 lbs.
1 1/2″ NPT
160 SCFM
2.75 lbs.
2″ NPT
220 SCFM
3.75 lbs.