PART NO : AB8367 Push-Pull control valves are most often mounted on the vehicle dash board and are used for a variety of control applications. The PP-1 valve is pressure sensitive, normally closed, on/off control valves which automatically return to the exhaust (button out) position when supply pressure is below the required minimum. They may be manually operated to either position when pressure is above the required minimum. Pressure settings and button configuration and lettering may vary, depending on application. Comes with a plain black knob. MODEL:PP1 RELEASE PRESSURE:40 PSI SHAFT SIZE:3/8" PORTS: CROSS REFERENCES:275176, PP-1, 3265205R91, JNY0807DA cross reference listing means that this valve is a suitable replacement for the part numbers listed. Some changes in air line plumbing may be required.