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 |
Downloads
Service Products
GEA Ammonia Dryer
The GEA Ammonia Dryer removes water from the refrigerant cycle and makes the perfect addition to ammonia refrigeration systems along with filters and purgers.
GEA Service Kits for screw and reciprocating compressors
Welcome to the world of simplicity with GEA Service Kits for screw and reciprocating compressors. Our mission is clear - to make your experience with original spare parts seamless and your operations smoother than ever. "Take it easy, use a kit" is not just a tagline – it is a promise we deliver on.
PR-OLEO® Premium-Quality Ammonia Refrigeration Oils
PR-OLEO® ammonia oils are the natural choice to optimize industrial cooling and heating applications operating with reciprocating or screw compressors.
GEA Insights
Heat pumps fast-track district heating decarbonization
The impact of global warming is increasingly apparent all over the world. Towns and cities everywhere face the same challenge: providing their communities with reliable, affordable, sustainably sourced heat. GEA spoke with an expert in the field, Kenneth Hoffmann, Manager, Heat Pumps at GEA Heating & Refrigeration Technologies, about tackling global warming faster.
Living the digital future of dairy farming with GEA
Something caught Farmer Tom's eye. Instead of another product demo, GEA showcased innovations via AR. That's only the start of GEA's interactive digital farm.
GEA homogenizers power bioinks for regenerative medicine
GEA scientists are working with researchers at the Graz University of Technology to configure a homogenization process and technology that turns eucalyptus pulp into 3D-printed, organic structures mimicking human veins, arteries and other tissues.
