Pressure Relief Valves for Cryogenic Liquids Select Pressure:450 PSI 9 psi at 72F The permeate adapters include 9 psi at 72F End Caps with Heavy Duty Stainless Steel Miniature Ball Valves Set pressure is not adjustable Liquid Oxygen Activation Pressure Driven Inlet Pipe Size 1 4 Connection Type Pipe Pipe Connection Type Threaded Connection NPT Male Location Bottom Maximum Pressure 600 psi Relief Port Thread Size 3 4" 20 Connection Type Pipe Pipe Connection Type Threaded Connection UNEF Female Location Top Set Pressure Accuracy ±5% Set Pressure Configuration Nonadjustable Temperature Range 320° to 165° F Shape Straight Overall Height 2 5 8" Material Body Brass Valve Type Relief Flow Coefficient (Cv) Not Rated Specifications Met CGA G 4