RVD Constant Pressure Valves

Regulating devices to ensure appropriate minimum differential pressure.

AWP constant pressure valves are autonomously working regulating devices (constant pressure function) within the oil management systems of screw compressor packages, to ensure defined minimum differential pressure (e. g. 3 bar, 4 bar etc.) or oil injection pressure during the start-up phase and running of the screw compressor. The constant pressure valve is equipped with a back-pressure compensation sealing element. The valve is opened by the pressure of the operating medium below the valve disc and depends on the set opening pressure of the valve (spring-loaded). The set pressure is determined by the customer and is set by the manufacturer.

  • Available in steel
  • Selection of body material as per German DIN EN12284, AD2000 Series W
  • Working mediums: refrigerants as per EN 378 p. 1, e. g. NH3, R134a, R290 (propane), R507 and blends with refrigerator oil; neutral, gaseous and liquid mediums; glycol-based cold brine
  • Installation position: in any position

RVD Constant Pressure Valves

straightway or angle type



Nominal Size

DN 40-150

Nominal Pressure Level

PS 25, PS 40

Temperature Range for Standard Valves

-20 °C to +120 °C

Temperature Range for HT Valve Series

-10 °C to +200 °C


butt welding and flanged ends as per DIN and ANSI
Set Pressure Range
1-25 bar

Get in touch

Armaturenstr. 2
17291 Prenzlau

Phone: +49 3984 8559-0
Fax: +49 3984 8559-18