RVA check valves have a lifting stem - can closed permanently
RVA Stop Check Valves
GEA check valves open autonomously by the pressure that 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. Additionally, RVA stop check valves may also be closed manually with a handwheel or a ratchet attached to the lifting stem. Rotating the stem clockwise will keep the valve disc down on the valve seat and therefore keeps the valve closed, counter-clockwise rotation will enable the valve disc to be opened by the pressure of the medium. The built-in damping device makes this type of valve especially suitable in cases where the power requirement / flow rate fluctuates. GEA stop check valves are designed for installation in industrial heating and refrigeration systems. They are installed on either the pressure or suction side of compressors or in pipes in which only one direction of flow is intended. The stem sealing is provided by a threaded bush with spring-elastic PTFE ring.
Stop Check Valve type RVA
Technical features
- Available in steel or stainless steel
- Selection of body material as per German DIN EN12284, AD2000 Series W
- Working mediums: refrigerant 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
- Installation is possible in horizontal and vertical position for upward flow direction
- Optionally available without damping
| RVA stop check valves | |
| material | steel or stainless steel |
| nominal size | DN 10-250 |
| nominal pressure level | PS 25, PS 40, PS 63 |
| temperature range for standard valves | -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
brazed ends threaded ends |
| additional information | available with cover extension and linear ball bearing |
Downloads
Related Products
RV Check Valves
Valves that are locked automatically by reversed flow direction.
RVAK Stop Check Valves
Check Valves with a rising stem with a PTFE-ring seal on the stem
stop, with regulating cone.
RVZ Check Valves
Check valves featuring a clamp design with or without integrated damping or with integrated damping and linear spindle bearing.
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
Turning wastewater into value
GEA centrifuges enable wastewater reuse, resource recovery, and water security by turning biosolids into value in a world facing growing water scarcity.
Around the world in seven questions: New foods we’ll love
Last year was not a year of hyped-up headlines for alternative proteins. Perhaps that is precisely why it was an important year for food biotech, the biotechnology behind everyday foods and ingredients. While the sector worked through a difficult funding environment, approvals were still granted, pilot lines set up and new platforms tested in the background. In short: headlines are turning into infrastructure. Frederieke Reiners heads GEA’s New Food business. She and her team work at the intersection of biotechnology and industrial food production. In this interview, she takes us on a world tour of food biotech in seven questions.
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.
