Models 34AS and 341AS air pilot operators thread directly onto the collars of push button valves and the Model ESB Electric Switch Bracket. They are primarily used for time delay circuits and other slow building pilot pressure applications. The actuation of the operator is delayed until the pilot pressure reaches 35 psig +/-5psig. At this pressure, the operator piston snaps forward and remains shifted until pilot pressure is exhausts. Maximum cycle life is obtained at 40-65psig, 125psig maximum.