SAFETY SHUTDOWN VALVE (SSV)
The SSV is a general safety valve, activated by an Analogue Switch to open or close when a preset current is reached. The SSV does not require an external actuator and powered by the line-fluid pressure.The SSV can be used as a manual or remotely actuated isolating valve.
EXCESS-FLOW SHUTDOWN VALVE (EFS)
Activated by the differential pressure ‘Pu – Pd’ to close when the flow through the valve reaches the excess-flow set-point.The valve can be operated as an automatic or manual isolating valve by utilizing a directional valve to charge/discharge the actuating chamber.