Model RV-6000 - Changeover Valve
From Other Products
AST RV-6000 changeover valves are three-way devices for flow selection in a pipeline, typically used to connect two safety valves to a single pressurized system. These devices ensure the possibility to have one safety valve always in operation and one in “stand-by”, ready to come into operation. These changeover valves are recommended to increase plant availability or to avoid plant shutdown, avoiding any relevant economic damage. RV-6000 changeover valves can be installed individually upstream of the safety valves or upstream and downstream of the safety valves, when outlet is connected to a closed header. If inlet and outlet changeover valves are used, a mechanical interlocking system prevents human error during the operation. Our simple design allows easy assembly / disassembly; easy removable seats allow quick and economic maintenance. These valves are suitable for a wide range of applications, such as high temperatures, cryogenic service, lethal fluids and many others.
- Two safety valves can be installed together and one can be kept as spare.
- Changeover valves have been designed to minimize pressure drop; flow areas are always bigger than inlet or outlet connections.
- Materials: carbon steel, alloy steel, hastelloy, monel and other materials upon request.
- Accessories: the changeover can be equipped with a variety of accessories such as limit switches and pneumatic or electric actuators. It is available with stem bellows for a bubble tight sealing.
Sizes / Pressure Classes
Size: from NPS 3/4 to NPS 16. Rating: up to ASME 2500.
Design Codes & Product Standards
EN 12516, EN 1092, ASME B16.34, ASME B16.5, ASME Sect.VIII, IEC 60534.