Cast iron ball valve
The carbon content of casting steel is less, good toughness, compression and heat resistance were higher than cast iron. Cast iron valve does not apply to diesel oil, water and acidic medium. Cast iron valve is relatively cheap.

Valve (famen) is a fluid conveying system of control components, with a cut-off, regulation, guide, to prevent the reverse flow, voltage regulator, the leakage of the shunt or overflow, and other functions. Used for fluid flow control system of the valve, from the most simple cut-off valve to extremely complex automatic control system used in all kinds of valves, its quite a wide varieties and specifications.

The valve can be used to control air, water, steam, all kinds of corrosive medium, mud, oil, liquid metal and radioactive medium, etc. All types of fluid flow. Valve according to the material is divided into iron valves, cast steel valves, stainless steel valves (201, 304, 316, etc.), chrome molybdenum steel valves, molybdenum chrome vanadium steel valve, dual phase steel valves, plastic valves, such as non-standard custom-made valve material.