McMaster 4784K34 High Pressure Gradual On Off Valve, Pressure Class 800, Steel, Standard Port, 3 4 NPT Female 2161P 210 lbf Number of Pieces 210 lbf Number of Pieces 1500 Lubrication Self Lubricating Type Closed System of Measurement Inch Maximum Operating Temperature 400 Degrees F Static Load Capacity (N) 2 Interchangeable Core: No Valve Function On Off Valve Type Gate Actuation Manual Valve Operation Handle Handle Style Wheel Handle Type Standard Port Type Standard Shape Straight Fitting Type Connector Connection Type Pipe Connection Style Threaded Pipe Size 3 4 Gender Female Thread Type NPT Flow Coefficient (Cv) 19 Pressure Class 800 Maximum Pressure 1975 psi @ 100° F Maximum Steam Pressure 1100 psi @ 800° F Temperature Range 20° to 800° F Body Material Steel Gate Material Steel Packing Material Graphite End to End Length 3 9 16" Height 7" Length 3 7 16" Stem Type Rising Connection Style Flanged Seal Type Packing Specifications Met American Petroleum Institute Standard 602 these valves have a durable body that can withstand nearly twice the pressure of other gradual on off valves