Pneumatically Operated Valves

Pneumatically operated valves are available in both spool and poppet designs from 1/8 to 1/2 inch porting, 3/2 or 5/2, and in 5/3 versions. Variations include single or double air piloted, double acting with priority port, specialty flip-flop and oscillating valves as well as a group of 3/2 poppet valves for vacuum use.

Kuhnkes Series 76 valves are constructed from plastic, aluminium or zinc die cast and machined bodies to provide reliable service. Valves with both NPT and Metric threads are available to satisfy international requirements.

	Pneumatic Operator, 3/2 & 5/2, Spool Design Direct acting pneumatic operated spool valves are available with single, double or with priority actuators. Priority ports override signals from opposite pilot operator to ensure positive return to home position.
	Pneumatic Operator, 3/2, Poppet Design Three way pneumatically operated poppet valves provide high flow rates in a basic valve design. Available up to 1/2 inch ported in normally closed and normally open versions.
	Directional Control Valves, 5/2, Pneumatic Actuation Pneumatically operated poppet valves are available in single, double or with priority port actuators. The priority port design which overrides the signal from the opposite pilot operator to ensure return to a home position. Poppet valves rely on O-rings and gaskets to seal passageways within the valve and generally offer higher flow rates than other types of valves. These valves are available in port sizes of 1/8, 1/4 and 1/2 inch. Valves can be mounted using through body holes or assembled on manifolds.
	3 Position Valves, 5/2, Pneumatic Actuation Three position spool valves are used mostly to position cylinders. Valves with all ports open in the center position allow the cylinder piston rod to move freely, while valves with all ports closed in the center position will hold the cylinder in the desired position when no pilot pressure is present. A third type keeps line pressure on both sides of the cylinder piston. Pneumatically actuated spool valves are available in 1/8 and 1/4 port sizes. Valves can be mounted with through body holes or assembled on manifolds.
	Flip-Flop Valve, Pneumatic Actuation The Monostable Flip-Flop valve provides a 5/2 switched output from an air pilot pulse signal of at least 300 ms in length. A pilot pressure is applied to the control port changing the valve output position. The output valve maintains position until the next pilot pulse signal is applied. The control pilot signal must be greater than 50% of the switched line pressure.
	Oscillator Valve, Pneumatic Actuation This valve can be used to oscillate a double acting cylinder. Applications include mixing, stirring or sawing devices where time critical cycling is not required. A pneumatic control signal applied to the control port starts the valve oscillating. Speed is dependent on connected volume and line pressure, and can be controlled by the addition of flow control valves on the cylinder input ports. Typical speed is 16 cycles per minute at 6 bar.