A normally open 3-way valve that closes shortly after being pressurized and remains closed until pressure supplied is exhausted. Converts continuous supply of inlet air into a pulse of approximately 100 milli-seconds. Working range 30 to 150 p.s.i. Volume chamber 10-32. For mounting when 10-32 input is used for piping. Can be mounted by 1/8" male thread and nut supplied.