Cast steel Floating Ball Valve

Cast steel Floating Ball Valve

A cast steel floating ball valve is a floating ball valve that uses cast steel material. It takes the advantage of the structures of  both ball valve and floating valve. In addition, it also benefits from the properties of its material.
Here I will introduce them one by one.

Ball valves should be durable. Because this kind of valve is usually work to get perfect shutoff even after years of idle. Therefore, an excellent choice for shutoff applications is the main strength of ball valves comparing with globe valves and gate valves. Ball valves are widely used in industry as they are very versatile, supporting pressures up to 700 bars and temperatures up to 200°C. Sizes generally range from 0.5 cm to 30 cm. Finally, they are convenient to repair and operate.

The ball valves generally fall into one of two categories, a floating ball valve or a trunnion type ball valve.

A floating ball valve is a valve with its ball floating inside the valve body, while a trunnion ball valve is fixed on its valve seat. A floating ball valve drifts toward to the downstream side and tightly pushes against the seat under the medium pressure to guarantee sealing reliability. The floating ball valve has simple structure, good sealing performance, however, the seat material is required to withstand the workload since the sealing pressure is exposed by the seat ring. Floating ball valve is mainly used in middle or low pressure working conditions, as it has unavailability of high performance seat material.

Steel is an alloy of iron and carbon. It is produced in a two-stage process. First, iron ore is reduced or smelted with coke and limestone in a blast furnace, producing molten iron which is either cast into pig iron or carried to the next stage as molten iron. In the second stage, known as steelmaking, impurities are removed and alloying elements such as manganese, nickel, chromium and vanadium are added to produce the exact steel required. Steel then turn molten steel into blooms, ingots, slabs and sheet through casting, hot rolling and cold rolling.