SVU Safety Overflow Valves

Safety valves independent of back pressure, spring-loaded.

AWP’s SVU safety valves are designed for installation in the refrigerant cycles of industrial refrigeration systems. By default safety valves are meant for protecting refrigeration systems and their components from excess pressure (see also DIN 8975 part 7). They comply with the technical regulations of the German Technical Control Board (TÜV) and with AD2000 regulations. Once the set response pressure is reached AWP safety valves begin to open. They open within a 10 % pressure increase until the designed limit of the lift is reached. When the pressure drops again they start closing once the set response pressure is reached. They are completely closed within a pressure drop of 10 % below the set reponse pressure. These valves work independently of back pressure.

  • Available in steel or stainless 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: vertical as per AD2000-leaflet A2, and horizontal
  • Available valve seat seals:
    SVUA: PTFE seal, can be used at temperatures of -60 °C to +180 °C, cannot be used for response pressures of less than 10 bar.
    SVUB: elastomer seal, can be used at temperatures of -50 °C to +110 °C

SVU Safety Overflow Valves

angle type


steel or stainless steel

Nominal Size (Inlet/Outlet)
DN 10/10 – 65/100

Nominal Pressure Level

PS 25, PS 40, PS 63

Temperature Range for Standard Valves

SVUA: -60 °C to +180 °C

SVUB: -50 °C to +110 °C


flanged ends as per DIN and ANSI threaded ends
Response Pressure
4 – 63 bar

Get in touch

Armaturenstr. 2
17291 Prenzlau

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