VGS is pressure relieved 2-way normally open (NO) valves for steam, designed to be combined with: AVT Temperature actuators; STM Safety temperature monitors; STL Safety temperature limiters; AMV(E) 20 / AMV(E) 30 electrical actuators and AMV(E) 23 / AMV(E) 33 electrical actuators with spring return function. In combination with AVT temperature actuators and AMV(E) electrical actuators, valves can be used for temperature control with steam or hot water up to 200 °C.