ST-4 Air Brake Safety Valve – 170.800350 (153 PSI Opening, 1/4" NPT)

Automann part number 170.800350

Inlet Port- 1/4-18 NPT 
Vent- Ø .125 IN 
Number of Vents- 1 
Thread Sealant- Pre-Applied 
Adjustable- No 
Opening Pressure- 153 ± 7 PSI 
Closing Pressure- 50% of the Nominal Opening Pressure 
Hex Size- 9/16 IN 
Maximum Operating Temperature- 250 °F (121 °C) 
Minimum Operating Temperature- -40 °F (-40 °C)