EVR, normally closed (NC) EVR (NC) is a normally closed, direct or servo operated solenoid valve for liquid, suction and hot gas lines with fluorinated refrigerants. EVR valves are supplied complete or as separate components, i. E. Valve body, coil and flanges. Refrigerants: R22/R407C, R404A/R507, R410A, R134a, R407A, R23. For other refrigerants, please contact JUANPARTS. Temperature of medium: 40 - +105° C (10 W / 12 W coil). Max. 130° C during defrosting. Min. Opening differential pressure, EVR 2-3: 0.0 bar, EVR 6-22: 0.05 bar, EVR 25-32: 0.20 bar.