Floating ball valve: ball valve ball is floating, under the action of medium pressure, the ball can produce a certain displacement and tight pressure on the sealing surface of the outlet end, to ensure that the outlet end seal.Floating ball valve has the advantages of simple structure and good sealing, but the ball bears the load of the working medium all passed to the outlet sealing ring, so it is necessary to consider whether the sealing ring material can withstand the working load of the ball medium.This structure is widely used in middle and low pressure ball valves.

Fixed ball valve: ball valve sphere is fixed, compression does not move.Fixed ball valve with floating seat, by the medium pressure, seat movement, so that the sealing ring on the ball, to ensure sealing.Usually equipped with bearings on the upper and lower shafts of the ball, the operation torque is small, suitable for high pressure and large diameter valves.In order to reduce the operating torque of ball valve and increase the reliability of sealing, the emergence of oil seal ball valve, not only in the sealing surface pressure injection of special lubricating oil, to form a layer of oil film, which enhances the sealing, but also reduces the operating torque, more suitable for high pressure large diameter ball valve.

Elastic ball valve: The ball of the ball valve is elastic.Ball and seat sealing ring are made of metal material, sealing pressure is very large, relying on the pressure of the medium itself has not reached the requirements of sealing, external force must be applied.This valve is suitable for high temperature and high pressure media.Elastic ball is at the bottom end of the inner wall of the ball open an elastic slot, and obtain elasticity.When closing the passage, use the wedge head of the stem to inflate the ball and press the seat to seal.Before turning the ball, loosen the wedge head and the ball will return to its shape, resulting in a small gap between the ball and the seat, reducing friction and operating torque on the sealing face.

Ball valve according to its channel position can be divided into straight-through, three-through and right-angle.Three-way ball valves are available in T-type and L-type.T - type can make three orthogonal pipe interconnection and cut off the third channel, play the role of shunting, confluence.L-shape can only connect two orthogonal pipes, and can not maintain the interconnection of the third pipe at the same time, and only play the role of distribution.

1, three-way ball valve in the structure of the use of integrated structure, 4 face valve seat sealing type, flange connection less, high reliability, design to achieve lightweight

2, tee ball core T and L type, long service life, large circulation capacity, small resistance

3, ball valve according to the acting type of single acting and double acting two types, single acting type is characterized by once the power source failure, ball valve will be in the state of control system requirements.

According to its composition, ball valve can be divided into one piece, two pieces, three pieces.