Ball valve classification introduced

1, floating ball valve Ball valve ball is floating, under medium pressure, the ball can produce a certain displacement and squeeze the sealing surface at the outlet end to ensure that the outlet end of the seal. Floating ball valve structure is simple, good sealing, but the ball to withstand the load of the working medium are all passed to the export seal, so to consider whether the seal material can withstand the working load of the ball medium, when subjected to high pressure shock , The sphere may be offset. This structure, generally used in low pressure ball valve. 2, fixed ball valve ball valve ball is fixed, does not produce pressure after the move. Fixed ball valve with a floating valve seat, subject to media pressure, the valve seat to move, so that the ring is pressed on the ball in order to ensure the seal. Usually with the ball on the lower shaft equipped with bearings, operating torque is small, suitable for high pressure and large diameter of the valve. In order to reduce the operating torque of the ball valve and increase the reliability of the seal, in recent years there have been oil seal ball valves, both in the sealing surface injection of special lubricants to form a layer of oil film, which enhanced the tightness and reduced operating torque , More suitable for high pressure large diameter ball valve. 3, flexible ball valve (orbital ball valve) ball valve ball is flexible. Sphere and seat ring are made of metal materials, sealing a large pressure, relying on the pressure of the media itself has reached the seal requirements, must impose external forces. This valve is suitable for high temperature and pressure medium. Elastic ball is in the lower end of the ball wall to open a flexible groove, and to obtain flexibility. When closing the channel, the wedge-shaped head of the valve stem causes the ball to expand and press against the valve seat to seal. Before turning the sphere, the wedged head is released and the sphere then restores its original shape. This results in a small gap between the sphere and the seat, which can reduce the friction and operating torque of the sealing surface. 4, V-type ball valve This ball valve is a fixed ball valve, is also a single seat ball valve, regulating performance is the best ball valve, the flow rate is equal percentage, adjustable ratio up to 100: 1. Its V-cut and metal seat between the shear effect, especially suitable for containing fibers, small solid particles, slurry and other media. 5, three-way ball valve three-way valve with T-and L-type. T-type can make the three orthogonal pipeline interconnection and cut off the third channel, from the diversion, confluence. The L-type can only connect two pipes that are orthogonal to each other, and can not maintain the interconnection of the third pipe at the same time and only serve as the distributing function. Features: 1, three-way ball valve structure in the use of integrated structure, four seat sealing type, flange connection less, high reliability, the design achieved a lightweight 2, three-way ball points T-and L-type , Long service life, large flow capacity, small resistance 3, the ball valve by the role of sub-single role and double role of two types, single-acting feature is the event of power failure, the ball valve will be in control system requirements