WTA® Change Over Valves Types 11.7, 11.8, 11.75 & 11.85

WTA® Change Over Valves are used to connect two safety valves to a pressure system using one pipe point. Here, one safety valve is in operation and one safety valve is on stand-by. The stand-by valve can be removed during ongoing operation for service, while protection of the pressure system against inadmissible pressures is maintained. The use of change over valves allows essential maintenance work to be carried out on a safety valve, without interruption of the plant operation. This is realized by simply switching over to the relevant stand by safety valve, thus protecting the plant against excessive overpressure.