Within Q11F thread ball / Q611F thread Pneumatic Ball / Q911F electric threaded ball is a sphere with a circular channel for opening and closing pieces, turning ball with stem to achieve open and close the valve action. Valve opening and closing parts is a hole in the sphere of rotation around the vertical axis of the channel in order to achieve the purpose of opening and closing of the channel. Threaded ball valve is mainly used for pipes and cut off or connected media devices, can also be used for fluid regulation and control, valve fluid resistance is small, simple structure, small size, light weight, compact, reliable, easy operation and maintenance, does not cause the valve seal surface erosion, a wide range of applications. Nominal thread ball valve performance parameters applicable to the type of media suitable for stable range thread 1.6-6.4MPa water, oil, gas and some corrosive liquid (W.O.G) -20 ~ 232 ℃ ~ 350 ℃ G. NPT. BSPT. BSP. DI259 / 2999 thread ball valve main parts and materials Part Name Material Stainless steel SS316 Ball seals PTFE Teflon Teflon PTFE valve cover gasket body stainless steel SS316 SS316 CF8M stainless steel stem thrust washer Teflon PTFE packing Teflon PTFE packing gland nut washer stainless steel SS304 SS304 SS304 stem nut stainless steel lever handle sets plastic PLASTIC SS304