Ball valves are created in all straight variants; threaded, flanged, wafer, lug and welding. The body may be produced in several variations to fit different programs; machined from good forgings is an selection for large pressure important valves. The ball is replaceable. Normally chromium plated chrome steel or tungsten carbide http://augustzuldu.ivasdesign.com/12085207/ball-valve-can-be-fun-for-anyone