2021 Good Quality Control Valve Types - Electric actuator ball valve – Newsway

Electric ball valves are important actuators in industrial automation control systems. Electric ball valve is a valve that rotates around the axis of the valve stem based on the movement of the valve disc. The variation of the valve seat opening is directly proportional to the valve disc stroke. Mainly used to cut off or connect media in pipelines, it can also be used for fluid regulation and control, and is a pipeline pressure element in industrial automation process control.

The types of electric ball valves include: floating ball valve, fixed ball valve, track ball valve, V-shaped ball valve, three-way ball valve, stainless steel ball valve, forged steel ball valve, ash discharge ball valve, sulfur resistant ball valve, three-way ball valve, pneumatic ball valve, electric ball valve, sleeve ball valve, welded ball valve, flange ball valve, and threaded ball valve.
Floating Ball: The ball of a ball valve is floating, and under the pressure of the medium, the ball can produce a certain displacement and tightly press on the sealing surface of the outlet end, ensuring the sealing of the outlet end. The floating ball valve has a simple structure and good sealing performance, but the ball bears all the load of the working medium and is transmitted to the outlet sealing ring. Therefore, it is necessary to consider whether the sealing ring material can withstand the working load of the ball medium. When subjected to high pressure impact, the ball may deviate. This structure is generally used for medium and low pressure ball valves.
Fixed ball: The ball of a ball valve is fixed and does not move under pressure. Fixed ball valves are equipped with floating valve seats. When subjected to medium pressure, the valve seat moves, causing the sealing ring to tightly press against the ball to ensure sealing. Usually, bearings are installed on the upper and lower shafts of the ball, with small operating torque, suitable for high-pressure and large-diameter valves. In order to reduce the operating torque of ball valves and increase the reliability of sealing, lubricating oil is used to form a layer of oil film, which enhances sealing performance and reduces operating torque, making it more suitable for high-pressure large-diameter ball valves.
Elastic ball: The ball of a ball valve is elastic. Both the sphere and valve seat sealing ring are made of metal materials, with a high sealing pressure ratio. The pressure of the medium itself cannot meet the sealing requirements, and external forces must be applied. This type of valve is suitable for high-temperature and high-pressure media. An elastic sphere is obtained by opening an elastic groove at the lower end of the inner wall of the sphere. When closing the channel, use the wedge-shaped head of the valve stem to expand the ball and compress the valve seat to achieve sealing. Before rotating the ball, loosen the wedge head, and the ball will return to its original shape, creating a small gap between the ball and the valve seat, which can reduce the friction and operating torque of the sealing surface.

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NSW valve body and trim material can be offered in Forged type and Casting type. Next to stainless and carbon steel material, we also manufacture valves in special materials such as titanium, nickel alloys, HASTELLOY®*, INCOLOY®, MONEL®, Alloy 20, super-duplex, corrosion resistant alloys and urea grade materials.

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