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Pneumatic Operator, 3 Way, Spool DesignItem # 75022-71-21

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. Minimum pilot pressure 35 PSI.

Operating pressure range is 0 to 145 PSI. Pilot port size is 1/8.
Compact valves actuation force (pilot pressure): 50 PSI minimum. Dimensions: 2 7/8" L x 5/8" W x 1 1/4" D.
Spool design valves actuation force - 35 PSI minimum. Dimensions: approx. 3 1/4" L x 1 3/8" W x 7/8" D, (Double pilot 3 5/8" L).
Mounting via through body holes 3/16" dia.

For valve specifications see appendix. For detail dimensions contact factory.
Item #75022-71-21
DescriptionSingle Pilot Spring Return
Port Type1/8 NPT Ports (USA Std.)
Orifice0.236 in.
6 mm
Body No.1S
Length3 1/4 in.
Width1 3/8 in.
Depth7/8 in.
Body Mounting Hole3/16 in.
Operating Pressure Range35 to 145 psi
Cv0.68
Kv9.7
Flow @ 45 PSI17.6 SCFM
Flow @ 90 PSI31.7 SCFM
Flow @ 145 PSI51.5 SCFM
Flow @ 3 Bar500 lpm
Flow @ 6 Bar900 lpm
Flow @ 10 Bar1460 lpm
Intended Use- Series 75 and 76 valves are intended for general purpose industrial applications utilizing normal shop air supply systems. For special applications with other media or other environments, contact Kuhnke.

Media- Compressed air or other neutral gases, properly filtered. For applications on liquids contact Kuhnke.

Lubrication- Valves operate on lubricated or non-lubricated systems. After using components in a lubricated system, do not switch to an un lubricated system. Avoid over lubrication.

Vacuum Applications- Spool Valve designs can be applied on vacuum systems. For applications using poppet valves, use only specially assembled valves shown in the catalog.

Dimensions and Design Changes- All dimensions in this catalog are approximate, if necessary, detailed drawings can be obtained from Kuhnke or from one of the Kuhnke websites. Dimensions, valve design and materials are subject to change without notice.

Metric and NPT threads- Although similar in size, valve port threads in metric ported valves are different from NPT versions. NPT versions have a tapered thread that is used to form a seal with the fitting thread. Metric thread is straight, and the seal is provided by an o-ring or washer normally included with the connection fitting. Metric fittings can be used on NPT threaded valves, but NPT fittings cannot be used on metric threaded valves.


If you are looking for Pneumatic Controls, Pneumatic Valves then look no further than Ellis/Kuhnke Controls.