various types of valves manufacturers and suppliers
What Is a Valve?
The body (the exterior shell), the trim (a set of changeable wetted components), the stem, the bonnet, and an actioning mechanism are the most significant mechanical components that go into making a valve (manual lever, gear or actuator).
Commercial valves with a bore size more than 2 inches have cast body materials; smaller valves (usually 2 inches) or those with high pressure and temperature requirements have forged steel bodies.