What are the classification of stainless steel ball valve

Stainless steel ball valve I believe everyone is not unfamiliar, in every corner of the city can see the shadow of stainless steel ball valve, because of its easy installation, long life and other advantages by the industry's favorite and sought after. Stainless steel ball valve on the market a variety of, how should we distinguish it?

1, stainless steel ball valve according to the structure can be divided

Floating ball valve: The ball of the ball valve is floating. Under the action of the pressure of the medium, the ball will produce a certain displacement and press on the sealing surface of the outlet end to ensure the sealing of the outlet end. The floating ball valve has a simple structure and good sealing performance, but the load of the ball carrying the working medium is all transmitted to the outlet sealing ring, so it is necessary to consider whether the sealing ring material can withstand the working load of the ball. Spherical medium. This structure is widely used in low pressure ball valve.

Fixed ball valve: The ball of the ball valve is fixed and does not move after being pressed. The fixed ball valve is equipped with a floating valve seat. After the medium is pressurized, the valve seat moves, so that the sealing ring is tightly pressed on the ball to ensure sealing. The bearing is usually 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 the ball valve and increase the reliability of the seal, the oil-sealed ball valve has appeared. It not only injects a special lubricant between the sealing surfaces, forms an oil film, enhances the sealing performance, reduces the operating torque, and is more suitable for high pressure Large-diameter ball valves.

Elastic ball valve: ball valve ball is elastic. Ball and seat seals are made of metal materials, sealing pressure is very large. The pressure of the medium itself cannot meet the sealing requirements, and external force must be applied. The valve is suitable for high temperature and high pressure media. The elastic sphere is an elastic groove at the lower end of the inner wall of the sphere to obtain elasticity. When the channel is closed, the wedge head of the valve stem is used to expand the ball and press the valve seat to seal. Loosen the wedge head before turning the ball, the ball will return to its original state, leaving a small gap between the ball and the valve seat, which can reduce the friction of the sealing surface and the operating torque.

2, the ball valve according to its channel position can be divided

Straight-through type, three-way type and right-angle type. Three way ball valve has T type and L type. The T-type can connect three orthogonal pipes to each other and cut off the third channel, which can be split and merged. The L-type can only connect two orthogonal pipes and cannot keep the third pipe connected to each other at the same time. It only serves the function of distribution. Three way ball valve in the structure of the integrated structure, four seat sealing, flange connection less, high reliability, lightweight design. The tee ball core is divided into T type and L type, with long service life, large circulation capacity and low resistance.

3. Ball valve is divided according to function

There are two kinds of single action and double action. The characteristic of single-acting type is that once the power source fails, the ball valve will be in the state required by the control system.

4, the ball valve according to its composition can be divided

One-piece, two-piece, three-piece.

5, ball valve according to the material can be divided

Stainless steel ball valve (201, 301, 304, 304L, 316L), cast steel ball valve WCB, carbon steel ball valve, ductile iron ball valve, etc.

6, according to the driving mode is divided

Electric ball valve, pneumatic ball valve, manual ball valve, hydraulic ball valve.