Pneumatic Timing Circuits

A Kuhnke pneumatic timer has to be used with other pneumatic devices in order to create the logic function that many applications require. Do you need just a pulse or air after a delay period, do you need to time an off period and an on period separately, and have you considered how your circuit will start, stop and behave in the event of an air failure? Kuhnke can help you with all these questions and can supply many of the components needed in addition to the pneumatic timer itself. Here are some examples of the commonly used circuits.

Timing Circuit Timing using a Manual Push-Pull Valve
Push-Pull valve can be used to start and stop system manually while providing timing to the circuit. A 4 way valve can also be used when operating a double acting cylinder, or for alternating outputs.

(143Kb)
Timing Circuit Converting an On Delay timer output to an Off Delay output
On delay timer signals can be converted to an off delay signal with the use of an interposing normally open 3 way air piloted valve.

(143Kb)
Timing Circuit Timing using a Momentary Start Signal
A timing sequence can be established from a momentary pressure signal using an interposing pneumatically operated valve. The most common signal used is from a pushbutton, but inputs from limit switches, foot pedals or other devices can be used to initiate timing. The size of the air piloted valve determines the air volume output.

(156Kb)
Timing Circuit Continuous Cycling Timer Circuit
Continuous cycling is accomplished by the use of 2 timers operating a double air piloted valve. Off and on times are dependent on the type and set time of timers used. The size of the air piloted valve determines the air volume output. The position of the air piloted valve determines the start up of the timing sequence. If the timing sequence must be restarted in a specific order, a reset circuit must be added at port 12 of the air piloted valve to move it to the start position prior to resuming operation.

(183Kb)
Timing Circuit Continuous Cycling Timer Circuit Using PT Timers
Continuous cycling is accomplished by the use of 2 timers operating a spring return air piloted valve. Off and on times are dependent on the time range of the timers used. The size of the air piloted valve determines the air volume output.

(146Kb)
Timing Circuit Using a Momentary Start Signal with an OFF Delay PT41 or PT45 Timer
One shot timing can be initiated from a momentary air signal using a PT41 or PT45 off delay timer.

(146Kb)
Timing Circuit Timing using Start-Stop Pushbuttons
Separate start-stop pushbuttons can be used in conjunction with a double air piloted valve and an “or” logic valve to control a timing circuit if required. A wide selection of types and colors of pushbuttons is available to meet design requirements. The size of the air piloted valve determines the air volume output.

(138Kb)