Safety Devices for Protecting Refrigeration Systems against Excess Pressure Safety Valves

Safety Valves, type SVA & SVU, dependent on back pressure, spring-loaded.

Safety valves can be employed as relief or overflow valves in the refrigerant cycles of industrial refrigeration systems.

Safeguarding refrigeration systems, including it’s component parts, from excess pressure requires the installation of safety devices such as SVA & SVU Safety Valves from GEA.

Fully certified, they comply with the technical regulations of Internationally recognized classification authorities.

Technical Features

  • Available in steel or stainless steel
  • Selection of body material as per German DIN EN12284, AD2000 Series W
  • Working media: glycol-based cold brine refrigerant EN 378 p. 1, e.g. NH3, R134a, R290 (propane), R507, blends with refrigerator oil, neutral, gas and liquid media, glycol-based cold brine
  • Mounting position: vertical as per AD2000-leaflet A2, and horizontal

 
SVA Safety ValvesSVU Safety Valves
designangle typeangle type
materialsteel or stainless steelsteel or stainless steel
nominal sizeDN 10/25-65/65DN 10/10-65/100
nominal pressure levelPS 25, PS 40, PS 63PS 25, PS 40, PS 63
temperature rangeA: -60 °C to +180 °C 
B: -50 °C to +110 °C
A: -60 °C to +180 °C  
B: -50 °C to +110 °C
connectionflanged ends DIN, ANSI 
screwed ends
flanged ends DIN, ANSI  
screwed ends
set pressure5-63 bar4-63 bar

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Safety Valve Combinations, type WVR-SVA & WVR-SVU, not dependent on back pressure, spring-loaded.

Safety valve combinations using tried and tested GEA technology.

WVR-SVA Safety Valves

Dual safety relief valve combinations are safety devices dependent on back pressure for protecting refrigeration systems and their components from excess pressure (see also EN 378 part 2 and compliant with AD2000 regulations).

The safety valves open to the valve lift stop if the start-to-leak pressure (set pressure) rises within the 10% range and close if the pressure drops to the 10% range below the set point. 

Any defects that occur in the functional performance of the valves can be easily repaired. The 3-way valve enables the safety valves to be checked and maintained while the system is in operation, as one safety valve can be assessed while the other one protects the system.

WVR-SVU Safety Valves

Compliant with the technical regulations of the German Technical Control Board (TÜV), WVR-SVU Safety Valves safeguard the refrigeration system against excess pressure (see also DIN 8975 part 7).

Technical Features

  • Available in steel or stainless steel
  • Selection of body material as per German DIN EN12284, AD2000 Series W
  • Working media: glycol-based cold brine refrigerant EN 378 p. 1, e.g. NH3, R134a, R290 (propane), R507, blends with refrigerator oil, neutral, gas and liquid media, glycol-based cold brine
  • Mounting position: vertical as per AD2000-leaflet A2, and horizontal

 
WVR-SVA & WVR-SVU Combinations
materialsteel or stainless steel
nominal sizeDN 15-65
nominal pressure levelPS 25, PS 40, PS 63
temperature rangeA: -60 °C to +180 °C 
B: -50 °C to +110 °C
connectionflanged ends DIN, ANSI 
screwed ends
otheroptional with bursting disc, 
bursting disc holder, 
excess flow valve

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