Check valves for installation between two flanges
RVZ Check Valves
Check valves open autonomously by the pressure which is exerted by the working medium upon the valve disc. They start to open at a differential pressure of 0.01 to 0.05 bar and are fully open between 0.1 and 0.2 bar. As soon as the flow is interrupted or the flow direction is reversed, the valve closes automatically. The closing function is supported by the elastic force of the spring or by the valve disc’s own weight. RVZ check valves are designed for installation between two counterflanges that are attached directly to the valve housing. With this design the medium flow is not being diverged as it is the case for other check valve types. GEA check valves are designed for installation in the refrigerant circulation of industrial refrigeration systems. They are installed on the pressure or suction side of compressors or in pipes in which only one direction of flow is intended.
Check Valve type RVZ
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, R22, R134a and blends with refrigerator oil; neutral, gaseous and liquid mediums; glycol-based cold brine
- Available with and without damping for different mounting positions and flow directions
| RVZ check valves | |
| material | steel or stainless steel |
| nominal size | DN 25-400 |
| nominal pressure level | PS 25, PS 40, PS 63 |
| temperature range | -60 °C to +150 °C |
| temperature range for HT valve series | -10 °C to +200 °C |
| connection | flanged connection |
| other | available with hot gas connection
linear bearing oil drain |
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.
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 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.
GEA Insights
A new recipe for indulgence
What if your favorite chocolate didn’t require cocoa beans and your coffee was locally produced? As climate disruption, price hikes and ethical concerns hit two of our most beloved indulgences, scientists are reimagining how we produce them – using microbes, not monocultures. The goal: preserve the flavor and properties of coffee and chocolate while minimizing carbon emissions and improving food resilience.
Fueling the circular economy in shipping
Ports now compete not just on logistics, but on sustainability. At Greece’s Piraeus port, an advanced processing and recovery facility recycles ship waste oil into fuel. Equipped with GEA’s high-performance centrifuges, it sets a new benchmark for state-of-the-art, environmentally responsible port operations.
Closing the loop: key lessons for breweries from OeTTINGER
The 2022 CO2 shortage forced breweries to review their dependency on global supply chains. Many were forced to close, unable to carbonate their products. At its breweries in Germany, OeTTINGER GETRÄNKE is turning its own CO2 into a powerful lever for independence and sustainability – with the help of CO2 recovery technology from GEA.
