API 602 Forged Steel Gate Valve Design standard: API 602/BS5352 Flange connecting end: ASME B16.5 Butt welding connecting end: ASME B16.25 Wall thickness: API 602/ASME B16.34 Inspection and test: API 602 Pressure and temperature rating: ASME B16.34 Size: NPS ½″~NPS 3″, CL150~CL2500 Material: A105, LF2, F11, F22, F51, F91, F304, F316, F304L, F316L Drive device: Handle, Gear, Electric, Pneumatic Forged steel gate valves are available in three bonnet design. The first design is the bolted bonnet type, with male and female joint, spiral wound gasket, and make of F304L or graphite. Ring joint gasket is also available on request. The second design is the welded bonnet which with a threaded and seal welded joint. On request a full penetration strength welded joint is available. The third design is the pressure seal bonnet which with a threaded and pressure seal bonnet joint.