The valves are used in liquid, suction, hot gas and oil return lines with ammonia or fluorinated refrigerants. EVRS 3 and EVRST are designed for keeping open at a pressure drop of 0 bar. EVRS/EVRST 10, 15 and 20 are equipped with spindel for manual opening. EVRS and EVRST are supplied as components, i.e. valve body and coil must be separately ordered.