RVR Constant Pressure Valves

Constant pressure valves with check valve function.

The constant pressure valve with check valve function (RVR) is the successor of the constant pressure valve (RVD). It increases the pressure on the discharge side of the compressor during the start-up phase and open only after the oil circulation is completely secured. This prevents the refrigerant from condensing in case the compressor shuts down. The integration of the check valve function is a new feature compared to the previous constant pressure valve. The RVR is available in diameters of DN40 to DN150, and with optional customer-specific inlet and outlet connections.

  • Available in steel or stainless steel
  • Selection of body material as per German DIN EN12284, AD2000 Series W
  • Working mediums: Refrigerants according to fluid group 1+2 of pressure equipment directive (PED) 97/23/EG.
  • Installation position: horizontal and vertical with upward flow direction

RVR Constant Pressure Valves

angle type


steel or stainless steel

Nominal Size

DN 40-150

Nominal Pressure Level

PS 25, PS 40

Temperature Range for Standard Valves

-60 °C to +150 °C

Temperature Range for HT Valve Series

-10 °C to +200 °C


butt welding and flanged ends as per DIN and ANSI
Set Pressure
1-9 bar

Get in touch

Armaturenstr. 2
17291 Prenzlau

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