Safety devices for protecting refrigeration systems from excess pressure
RVR Constant Pressure Valves
The constant pressure valve with check valve function (RVR) is the successor of the constant pressure valve (RVD). It increases the pressure on the discharge side of the compressor during the start-up phase and open only after the oil circulation is completely secured. This prevents the refrigerant from condensing in case the compressor shuts down. The integration of the check valve function is a new feature compared to the previous constant pressure valve. The RVR is available in diameters of DN40 to DN150, and with optional customer-specific inlet and outlet connections.
Technical Features
- Available in steel or stainless steel
- Selection of body material as per German DIN EN12284, AD2000 Series W
- Working mediums: Refrigerants according to fluid group 1+2 of pressure equipment directive (PED) 97/23/EG.
- Installation position: horizontal and vertical with upward flow direction
| RVR Constant Pressure Valves | |
| material | steel or stainless steel |
| nominal size | DN 40-150 |
| nominal pressure level | PS 25, PS 40 |
| temperature range | -60 °C to +150 °C |
| temperature range for
HT Valve Series | -10 °C to +200 °C |
| connection | butt welding and flanged ends as per DIN and ANSI |
| set pressure range | 1-9 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
How freeze-dried pet food raises the bar
Pets are family – and owners expect premium, transparent and sustainable nutrition. Freeze-drying, powered by GEA technology, helps pet food makers deliver.
Blueprint for better: How GEA rebuilt itself
Since 2019, GEA has risen from underperformer to DAX member – one of Germany's top 40 listed companies – by fostering entrepreneurship and turning sustainability into a competitive advantage. It reached this milestone in its nearly 145-year history without tailwinds or shortcuts, in a world of compounding crises. This turnaround shows what's possible when purpose and performance align.
Video: GEA's 2025 year in review
This year was a big one for GEA. Can you remember all the milestones and highlights?
