Model "SP" ASME safety valves are designed for applications where a compact size is required and high flow capacities are not needed.

For example, a 3 HP compressor may add 10 SCFM of air into the receiver at 125 PSI. The "SP" will flow 42 SCFM at 125 PSI set pressure, so it will be adequate for this system.

Resilient flourocarbon rubber pad insures valve is bubble-tight to within 10% of set pressure. 1/8" NPT and 1/4" NPT inlets available.

All brass construction with stainless steel spring. Stamped with "UV" and "NB" symbols.

Available set pressure range 75 PSI to 250 PSI. Set pressure tolerance +3% of set pressure. 250°F max. temperature.

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 "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 "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 "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 "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.

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 1-1/4" 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.

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

Female Pipe Thread Inlet Valves

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.