McMaster 4599K45 Gradual On Off Valve, Bronze Body & Gate, Easy Maintenance, Wheel Handle Rising Stem, 1 NPT Female, Class 150, MSS SP 80 KD3400 Fabric Weight 4 oz sq yd Fabric Weight 4 oz sq yd Number of Heads Included 6 they open and close gradually to prevent sudden starts and stops Valve Function On Off Valve Type Gate Actuation Manual Handle Style Wheel Handle Material Iron Pipe Size 1 Gender Female Thread Type NPT Flow Coefficient (Cv) 54 Pressure Class 150 Maximum Pressure 300 psi @ 100° F Maximum Steam Pressure 150 psi @ 365° F Temperature Range 20° to 400° F Body Material Bronze Gate Material Bronze Packing Material Graphite End to End Length 2 9 16" Overall Height 8 1 16" Stem Type Rising Seal Type Packing For Use With Water