Pressure Regulating Valve, 2 Way, Flange, Connection Size (In.) 1-1/2, Port (In.) 1 1/2 in, Min. Fluid Temp. (F) -4 Degrees F, Design Pressure (PSIG) 630 psig, Set Points 200 to 400, Application Head Pressure Control with Non-Corrosive Refrigerants, For Use With Non Corrosive Refrigerants, STT17A-610R, SEP93A-603R