Image is for illustration purposes only. Actual part may vary.
170.800350
The Automann 170.800350 is an ST4-type safety valve that protects your heavy truck's air brake system from over-pressurization. It is typically installed on an air dryer, such as a Bendix ADIS unit, where it opens at 150 PSI to vent excess pressure and prevent component damage. Replace this valve if you notice air leaks, the valve fails to seal, or the system pressure becomes unstable. With a 1/4-18 NPT thread, it directly replaces several OEM and aftermarket part numbers.
Commonly used on heavy-duty trucks equipped with Bendix ADIS-style air dryers. Verify the pressure setting (150 PSI) and thread size match your dryer's safety valve port before installation.
Part Number: 170.800350
ST4 TYPE SAFETY VALVE
Unit: ea
Dealer: KP Services Crossville
Compatibility, alternatives, and more
Parts commonly needed alongside air system
