Auto-Change Safety Valve

This automatic changeover safety valve assembly is composed of a three-way switching mechanism and two safety valves in parallel, adopting one-duty one-standby configuration. It enables automatic switching between working valve and standby valve. One safety valve provides continuous overpressure protection while the other can be isolated for inspection, calibration and maintenance without shutting down the whole system. Equipped with mechanical interlock to avoid misoperation. Various sealing forms and material options are available. Widely used for pressure protection of pressure vessels and pipelines in petroleum, chemical, natural gas and power industries requiring uninterrupted operation.