Soft sealed electric ball valve

Q941F-16C-DN150Soft sealed electric ball valveExcellent sealing performance, high flow capacity, low flow resistance coefficient, simple structure, easy maintenance, long service life, valve body channel and connecting pipe diameter are equal and form one diameter, and the medium can flow through almost without loss. Can be equipped with high-performance actuators such as CHV and HQ. Electric ball valves are commonly used in applications with strict sealing requirements. In addition to controlling gas, liquid, and steam media, they are also suitable for controlling sewage and media containing fibrous impurities. They are widely used in various fields such as petroleum, chemical, metallurgical, light industry, papermaking, power plants, refrigeration, etc. Electric ball valves are an important type of valve that are widely used in fields such as petrochemicals and long-distance pipelines. The closing element of a ball valve is a ball (or partial ball) with a hole, which rotates with the valve stem to open or close the valve. Electric ball valves can be fully closed and opened by rotating 90 °. Compared with gate valves and globe valves of the same specifications, ball valves have smaller volume and lighter weight, making them easier to install pipelines.

Q941F-16C-DN150Soft sealed electric ball valveClassification of
1. Float ball valve: The ball of the ball valve is a float ball. Under the action of medium pressure, the float ball valve can produce a certain displacement and tightly seal the outlet end to ensure the sealing of the outlet end. Floating ball valves have a simple structure and good sealing performance, but the ball valve bears all the load of the working medium transmitted to the outlet sealing ring. Therefore, it is necessary to consider whether the sealing ring material can withstand the load of the spherical medium. When subjected to high-pressure impact, the ball valve may undergo displacement. Low pressure ball valves are commonly used in this structure.
2. Fixed ball: does not move under pressure. Fixed ball valves are equipped with floating valve seats. When subjected to medium pressure, the valve seat will move, securing the sealing ring to the ball to ensure sealing. Generally, bearings are installed on the upper and lower shafts of the sphere, with a small working torque distance and suitable for high-pressure large-diameter valves. To reduce the operating torque of ball valves and improve sealing reliability, a layer of oil film is formed by lubricating oil, which not only strengthens the seal but also reduces the operating torque, making it more suitable for high-pressure large-diameter ball valves.
3. Elastic ball: The ball valve ball has elasticity. The ball and valve seat sealing ring are both made of metal materials, and the sealing pressure is relatively high. It is impossible to meet the sealing requirements by relying on the pressure of the medium itself, and external force must be applied. This valve is suitable for use in high-temperature and high-pressure media. An elastic sphere is formed by creating an elastic groove at the lower end of its inner wall to obtain elastic force. When closing the channel, the wedge-shaped head of the valve stem is used to lift the ball and press it against the valve seat to achieve sealing. Release the wedge-shaped head before rotating the sphere, and the sphere will return to its original shape, resulting in a smaller gap between the sphere and the valve seat, which can reduce the friction and operating torque of the sealing surface.