Pressure Regulating Valve, 2 Way, Flange, Connection Size (In.) 1-1/2, Port (In.) 1 1/2 in, Design Pressure (PSIG) 320 psig, Set Points 70 to 260, Application Head Pressure Control with Non-Corrosive Refrigerants, For Use With Non Corrosive Refrigerants, STT17A-610R, SEP91A-603R