Safety Devices for Protecting Refrigeration Systems from Excess Pressure
Overflow Valves
GEA overflow valves are dependent on back pressure and are spring-operated, their components have not been tested individually. The lifting stem is sealed by two chloroprene o-ring seals. GEA overflow valves are suitable for installation as: safety devices for controlling the high pressure side of compressors; safety devices in combination with two safety pressure control valves whose components have been tested; safety device for protection of closed pipe systems.
Overflow Valve type UVA
Technical Features
- 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 media; glycol-based cold brine
- Installation position: vertical and horizontal
- Available valve seat seals:
- UVAA: PTFE seal, can be used at temperatures of -60 °C to +180 °C
- UVAB: elastomer seal, can be used at temperatures of -50 °C to +110 °C
| UVA Overflow Valves | |
| material | steel or stainless steel |
| nominal size | DN 10-32 |
| nominal pressure level | PS 25, PS 40, PS 63 |
| temperature range for standard valves | UVAA: -60 °C to +180 °C
UVAB: -50 °C to +110 °C |
| temperature range for
HT Valve Series | -10 °C to +200 °C |
| connection | butt welding and flanged ends as per DIN and ANSI
brazed ends threaded ends |
| response pressure range | 1-25 bar |
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