Safety Valves type SVA & SVU
SVU Safety Overflow Valves
GEA 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 GEA 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 response pressure. These valves work independently of back pressure.
SVA Safety Relief Valves
GEA SVA safety valves are designed for installation as relief valves 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 EN 378 part 2). They comply with the technical regulations of the German Technical Control Board (TÜV) and with AD2000 regulations. Once the set response pressure is reached GEA 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 response pressure. These valves work dependently of back pressure.
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 mediums; glycol-based cold brine
- Installation position: vertical as per AD2000-leaflet A2, and horizontal
- Available valve seat seals:
- SVUA / SVAA: 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 / SVAB: elastomer seal, can be used at temperatures of -50 °C to +110 °C
| SVU Safety Overflow Valves | SVA Safety Relief Valves | |
| material | steel or stainless steel | steel or stainless steel |
| nominal size (inlet/outlet) | DN 10/10-100/100 | DN 15/25-100/100 |
| nominal pressure level | PS 25, PS 40, PS 63 | PS 25, PS 40, PS 63 |
| temperature range | SVUA: -60 °C to +180 °C
SVUB: -50 °C to +110 °C | SVUA: -60 °C to +180 °C
SVUB: -50 °C to +110 °C |
| connection | flanged ends as per DIN and ANSI
threaded ends | flanged ends as per DIN and ANSI
threaded ends |
| response pressure | 4-63 bar | 5-63 bar |
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