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.

Trunnion ball valve using the principles of

Trunnion ball valve is guaranteed by the pressure poorly. Flat stack valve to valve flatness and smoothness requirements friction plane quite high, and the requirements for the use of materials Instrument needle valve also have high demands. To solve these problems, flat lamination stack valve using a ceramic substrate under the topsheet other using a high-strength wear-resistant material, in full accordance with the principles of chemical mechanical seal manufacturing and processing, both to ensure a reasonable contact surface, and ensure the minimum coefficient of friction. Trunnion ball valve has emerged cause Valve manifolds  quality problems due to prolonged blockage of the pilot hole, the pressure relief valve stem causing the valve stem is stuck adsorption of iron particles and other issues, through the use of market information and feedback, developers have learned Trunnion ball valve actuators Division is currently unsuitable water quality of water use. Thus, the developers turned to the ball and flat stack valves. Now use the ball a little more.

Trunnion ball valve of the main features of which

The main features of Trunnion ball valve is its own compact, reliable sealing, simple structure, easy maintenance, regular spherical surface and seal in the closed state, the media can not easily be eroded, easy operation and maintenance for water, solvents, acids, and natural gas general working media, but also suitable for harsh working conditions of media, such as oxygen, Instrument needle valve hydrogen peroxide, methane and ethylene, in various sectors has been widely used. Trunnion ball valve is mainly used to cut off or turn on the line of medium, can also be used to regulate and control the fluid, Instrumentation ball valve which has a very hard seal between the V-ball ball core with its V-shaped carbide hardfacing metal seat strong shear force, especially for fiber-containing, small solid granule and other media. And Trunnion ball valve on the pipeline flexibility to control not only the confluence of media, streaming, and flow switch, but also to close any channel leaving the other two channels are connected.

Features Trunnion ball valve is constructed

Trunnion ball valve stem through the flat keys or splines or square convergence deed with the handle, versatile, Trunnion ball valve convenient disassembly. Stainless steel ball valve stem with anti-blown construction. High-pressure valve packing selection knitting, flexible graphite seals or tetrafluoroethylene-ene ring, so that to achieve robust stainless steel ball valve stem seals must be smooth in the case. Based on need, high-pressure valve can be planned into the anti-static structure, providing a conductive spring between the ball and the Double ferrule fitting  stem and the valve, to prevent static sparking extinguish flammable materials to ensure system safety. Trunnion ball valve seal vice situation varied. Trunnion ball valve task truth is by reversing valve love to make valve dredge or occlusion. Valve switch light, small size, can be made very large caliber, reliable sealing, simple structure, convenient maintenance, Instrument needle valve regular spherical surface and seal in the closed condition, can not easily be eroded media, in all sectors lost universal use.

Trunnion ball valve elastic ball valve

The ball valve is elastic. Ball and seat ring are made ??of metal materials, sealing pressure than large, rely on the media itself has reached less pressure sealing requirements must apply force. This valve is suitable for high temperature and pressure medium. Elastic sphere is the sphere in the lower end of the inner wall of the opening of a resilient groove, Instrument valve and access flexibility. When closing the channel, wedge-shaped head with a stem so that the ball up on and the valve seat seal. Before turning the ball first release wedge-shaped head, the ball followed by restoration of the original prototype, so there is very small gap sealing surface can reduce friction and operating torque between the ball and the valve seat. Ball position can be divided according to their straight-channel, three-way and the right angle. After two ball valves for dispensing media and change the flow of the medium. Ball O-Ball and V-ball points. O type ball floating structure, ball core for precision castings, hard chrome plated exterior,Double ended cylinder seat with PTFE material, the same stream crossings and pipe diameter, maximum flow capacity, flow resistance is extremely small, closed without leakage, generally do switch valve, especially suitable for high viscosity, fibrous, granular media; V-ball with a fixed structure, opened a V-notch ball core, can achieve proportional control, flow characteristics such as the approximate percentage. Depending on the choice of process equipment pneumatic or electric actuators, pneumatic valve and were composed of electric valve, which pneumatic valve as required to achieve the proportional control valve with positioner, electric valve as required to achieve the selected electronic proportional control electric actuator or with servo amplifiers.

Advantages of manual ball valve

Manual ball valve is a relatively new type of ball category , it has its own unique structure of some advantages, such as switches without friction , sealing easy to wear, a small opening and closing torque . Such actuators can be reduced with the specifications. With multi-turn electric actuators , can be realized on media regulation and tight cut . Widely used in petroleum, chemical, water supply and drainage and other cities demanding cutting conditions.
Trunnion ball valves in the pipeline is mainly used for cutting, distribution and change the flow direction of the medium. Ball is a new type of valve is widely used in recent years , it has the following advantages:
1 . Fluid resistance , its drag coefficient with the same pipe length equal.
2 . Simple structure, small size, light weight.
3 . Close and reliable valve sealing surface material widely used plastic , sealing, has also been widely used in the vacuum system .
4 . Easy to operate, opening and closing rapidly , from fully open to fully closed as long as the rotation of 90 °, to facilitate remote control .
5. Easy maintenance , simple ball valve, seals are generally activities , removal replacement is more convenient.
6. When fully open or fully closed, the sealing surface and the dielectric isolation ball and seat , through the media , will not cause erosion of the valve sealing surface.
7 . Wide range of applications , from small diameter to a few millimeters to a few meters from the high vacuum to high pressure can be applied . When the ball is rotated 90 degrees , in the import and export of office should be fully rendered sphere , thus cutting off the flow.

Trunnion ball valves

Two-axis ball belongs to the high-pressure Trunnion ball valve  series, the compact features of the structure of the valve, appearance, maximum flow rate, low operating torque, enabling 2-way and 3-way path, enabling the panel installation, enabling pneumatic and electric actuators, important about seeking law instructions, ball unused for some time may have a higher initial torque to open all series ball valves are bi-directional test using nitrogen at the factory. The maximum allowable leakage test pressure the ball for the simple task can not be detected leaks.