The Pneumatic Pulse Timer controls the pulse valves for use in explosion sensitive conditions or where electric control is not applicable.*
*Principle of Operation:
The wiper arm assembly of the controller is operated by a pneumatic ratchet drive. It pauses between valve connections for a present time which is adjustable by the user. The pulse time is also user adjustable by means of a throttle valve accessed after removal of the lower casing. During the pulse time the wiper arm passes beneath a valve connection port and vents the pilot line to that particular valve. The valve opens and remains open until the wiper arm moves on to the next position. The pilot air is vented through the port marked ”R” underneath the manual override knob, which is marked to show the exact position of the wiper arm. The interval is adjusted by a pneumatic timer through the front hole of the unit and the switching time adjusted as previously described.