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Kuhnke Proportional Valves

Proportional Valves

Proportional valves are used for control and dosing of liquids and gases. Due to their reliable function, their small hysteresis and their very good regulation properties Kuhnke proportional valves convince in various applications.

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Proportional Valves

Product Information

Kuhnke proportional valves are used for control and dosing of liquids like water or gases like oxygen.

The flexibility in adapting Kuhnke proportional valves regarding media compatibility or performance data creates possibilities for various applications. The flow of 2/2-way Kuhnke proportional valves can be controlled by current input variation. If used in closed-loop with appropriate electronics and sensors, the flow can be continuously regulated to specific levels.

Not only Kuhnke proportional valves can be delivered as stand-alone product, moreover they can be designed as customer-specific valve manifolds or valve systems with control electronics.

Kuhnke standard proportional valves series 68P with 15 mm width reach flow rates of 0 to 90 Nl/min air.

The Kuhnke standard proportional valves series 63P with 10 mm width enlarge the field of possible applications in the area of low flows ranging from 0 to 30 Nl/min air.


  • Compact design
  • Use of different media possible
  • Low-noise version on request
  • Higher flows at low power consumption


  • Medical engineering
  • Analysis and laboratory equipment
  • Dental technology
  • Power engineering
  • Process engineering

General Technical Specifications

Technical Data  
Nominal voltage 24 V DC; others on request
Pressure range 0 to 5 bar (0 to 7 bar); depending on orifice size
Nominal orifice 0.7 to 1.6 mm
Valve function 2/2-way NC
Ambient temperature From -10 °C to +40 °C
Power consumption 3.2 to 4.2 W
Duty cycle 100%
Electrical connections Series 63P: Plug
Series 68P: Wire or Pin
Operating medium 5 micron filtered, lubricated or non-lubricated compressed air; also suitable for other media conforming to ISO-VG 10.

We reserve the rights of modification, omission, error. Illustrations similar.