Fixed ball valve

Fixed ball Instrument valve manifolds , is a new generation of high-performance ball valve, suitable for long-distance pipelines and general industrial pipeline, its strength, safety, resistance to harsh environments and so on in the design of special consideration, suitable for all kinds of corrosive and non corrosive media. It is compared, and the floating ball work force, fluid pressure before the Valve manifolds is generated in the sphere of all transferred to the bearing, not to move the ball to the seat, which seat would not put too much pressure, so the torque of the fixed ball valve seat seal small, small deformation, stable performance, long service life, suitable for high pressure, large caliber occasions. Advanced spring pre seat assembly, self tight characteristic, and the upstream seal. Each valve has two valve seats, each direction can be sealed, so the installation does not restrict the flow is bidirectional. This valve is usually installed horizontally.
Fixed ball valve has two style and three type two body structure, the flange bolts, sealed with PTFE inserts into the stainless steel ring, steel ring is arranged at the rear part of the spring to ensure the seat close to the ball, keep the seal. The upper and the lower valve rod are provided with PTFE bearings, reducing friction, labor-saving operation, a small shaft bottom is provided with an adjusting plate, ensure the ball and the sealing ring is connected with a position. Full size: the valve flow aperture consistent with the pipeline diameter, for pipeline cleaning.

High pressure ball valve

High pressure ball High pressure needle valve is rotated 90 degrees with the action, the cock body is a sphere, a circular through-hole or channel through its axis. The direction of the flow High pressure ball valve in the pipeline is mainly used to make cutting, changes in media distribution, it only needs to rotate 90 degrees rotation of the operation and a small torque can be closed tightly. The most suitable valve do switch, shut-off valve, but the recent development has been designed so that it has a throttle valve and flow control purposes, such as V type ball valve.
The main features of high pressure of the valve itself is compact in structure, reliable sealing, simple structure, convenient repair, sealing surface and spherical often in the closed state, can not easily be medium erosion, easy to operate and repair, and is suitable for water, solvents, acids and natural gas general working media, but also applies to poor working conditions of media, such as oxygen, hydrogen peroxide, methane and ethylene, widely used in various industries. Ball valve can be integral, it can be modular.
The advantages of high pressure ball valve:
1 fluid resistance small, full bore ball valve little flow resistance.
2 has the advantages of simple structure, small volume, light weight.
3 close and reliable. It has two sealing surface, and the current valve sealing surface material is widely used in all kinds of plastic, good sealing performance, and can be completely sealed. In the vacuum system has also been widely used.
4, the operation is convenient, quick open and close, from fully open to fully closed as long as the rotation of 90 DEG, facilitate remote control.
5 ball valve has the advantages of simple structure, convenient maintenance, 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, through the media will not cause erosion of the valve sealing surface.
The 7 is suitable for a wide range, from small diameter to a few millimeters, a few meters from the large, high vacuum high pressure can be applied.
8 because the ball in the opening and closing process of wiping, it can be used with suspended solid particles of the medium.

The classification of ball valve

One, floating ball valve
Ball High pressure needle valve ball is floating in the medium under pressure, can produce some displacement of the sphere, and pressed in the export side of the sealing surface, to ensure that the exit seal. Floating ball valve structure is simple, good sealing, but the ball under the load of all media work to export ring, so to consider the ring material can withstand the work load of the media sphere. This structure, widely used in low-pressure Stainless steel needle valve.
Two, fixed ball valve
The ball valve is fixed, no movement after compression. Fixed with a floating ball valve ball valve seat, by the media pressure, the valve seat have a mobile, so that the sealing ring is pressed on the sphere, in order to ensure the sealing. Usually with the ball in the upper and lower shaft with bearings, operating torque, suitable for high pressure and large diameter of the valve. In order to reduce the valve operating torque and increase the reliability of the seal, valve seal has emerged in recent years, both pressure lubricating oil special note in the sealing surface, to form a layer of oil film, which enhances the sealing, and reduce operating torque, more suitable for large-diameter high-pressure valve.
Three, elastic ball valve
The ball valve is flexible. Ball and valve seat rings are made of metal materials, sealing pressure than the large, rely on the media itself can not seal the pressure has reached the requirements must be imposed by external forces. This valve is suitable for high temperature and high pressure medium. Elastic sphere is a flexible open slot in the sphere of the bottom wall, and get flexible. When the closed channel, with the stem of the wedge-shaped head to open up the ball with the valve seat to seal compression. In the rotating sphere before loose wedge head, ball the subsequent restoration of the original prototype, so that a small gap between the ball and the valve seat sealing surface can reduce friction and operating torque.