Safety devices for protecting refrigeration systems from excess pressure

RVR Constant Pressure Valves

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.

RVR Constant Pressure Valves

Technical Features

  • 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
materialsteel or stainless steel
nominal sizeDN 40-150
nominal pressure levelPS 25, PS 40
temperature range-60 °C to +150 °C
temperature range for
HT Valve Series
-10 °C to +200 °C
connectionbutt welding and flanged ends as per DIN and ANSI
set pressure range1-9 bar

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