Eccentric V Type Ball Valve characteristics, classification, structure principle, usage and maintenance

Eccentric semi ball valve and gate valve is the same type of valve, the difference in its closure is a sphere, the sphere rotates around the body center line to achieve a valve open, closed. The direction of the flow valve in the pipeline is mainly used for cutting, distribution and change the media. Two piece ball valve, three piece ball valve, is a new type of valve is widely used in recent years.

Eccentric V Type Ball Valve


1 fluid resistance small, the drag coefficient with the same length of pipe.

2 has the advantages of simple structure, small volume, light weight.

The Eccentric V Type Ball Valve position according to their channels can be divided into straight through, three links and right angle type. After two kinds of ball valves for distribution of media and change the flow of media. Three piece ball valve installation and maintenance should pay attention to the following matters:

1 to leave the position of valve handle rotation.

2 can not be used for throttling.

3 belt drive mechanism of the valve should be installed upright.

Working principle.

By rotating the valve to the valve flow or occlusion of chain. Valve switch light, small size, can be made into a large caliber, reliable sealing, simple structure, convenient repair, sealing surface and spherical often in the closed state, the media can not easily be eroded, widely used in various industries.

Main uses:

Distribution and change the direction of media flow. Ball valve is a new valve is widely used, it has the following advantages:

1 fluid resistance small, the drag coefficient with the same length of pipe.

2 has the advantages of simple structure, small volume, light weight.

3 closely reliable, valve sealing surface material widely used plastic, good sealing performance, in the vacuum system has also been widely used.

The 4 operation is convenient, quick open and close, from fully open to fully closed as long as the rotation 90 °, facilitate remote control.

5 ball valve has the advantages of simple structure, convenient repair, seals are generally activities, the removal of the replacement is more convenient.

6 in the fully open or fully closed, the ball and seat sealing surface and the dielectric isolation, the medium through, will not cause erosion of the valve sealing surface.

The 7 is suitable for a wide range, from small diameter to a few Cast Steel Floating Ball Valve, a few meters from the high vacuum, high pressure can be applied. The ball is rotated 90 degrees, in the inlet, the outlet should be fully present sphere, thus cutting off the flow.

Eccentric semi ball valve is a new type of ball valve type, it has some advantages of the unique structure of its own, such as the switch without friction, seal is not easy to wear, hoist torque small. This reduces the actuator with the specifications. With multi turn electric actuator, which can be realized on the media regulation and tight shutoff. Widely used in petroleum, chemical industry, city water supply and drainage are strict cut-off conditions.

Structure form:

Eccentric semi ball valve in the appearance of the structure is divided into two:

1, jacket type: mainly for erosion wear very serious medium, upper structure in replaced repair damaged headstock piece is very convenient, need not put the entire valve removed from the pipeline, which greatly saves the time and cost of repair.

2, side mounted: side mounted valve compact structure, light weight, suitable for valve installation space requirements of the occasion.


The eccentric semi ball valve is a jacket type structure. Can be directly online inspection and repair of the valve installed in the pipe, can effectively reduce the plant parking, reduce costs.

The eccentric semi ball valve is a single seat design. Remove the valve in the cavity medium affected by abnormal use boost security problems.

The low torque design. Special structural design of the stem, just with a little hand to easily open and close the valve.

The open and close without friction. This function completely solve the traditional [wiki] [/wiki] valve sealing surface due to friction between the sealing problems.

The wedge-shaped seal structure. The valve stem is provided by the mechanical force, the ball seat on the wedge pressure to seal, the valve seal is not affected by the impact of changes in pipeline pressure, the sealing performance under various conditions have a reliable guarantee.

Self cleaning structure and eccentric semi ball valve sealing surface. When the ball roll away from the valve seat, fluid in the pipeline along the sealing surface of the sphere into 360 DEG through, not only eliminates the high-speed fluid to seat local scour, also washed away the accumulation on the seal face, to achieve self cleaning purposes.