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.

Trunnion ball valve preservation method described

Trunnion ball valve body's first anti-corrosion, the main choice of stainless steel, carbon steel. Although anti-corrosion materials is very rich, but whether the election was appropriate or not an easy thing, because the corrosion problem is very complex.Valve manifolds Choose body material difficulties, lies not only consider the corrosion problem, but must consider the ability to withstand temperature, whether economically justified, is it easy to buy and other factors. Followed Trunnion ball valve liner take measures, such as lead-lined, Instrument needle valve lining aluminum, plastic lining, the lining of natural rubber and synthetic rubber and the like. The medium conditions permit, This is an economical way. Again, under pressure, the temperature is not high,(Check valve) made with non-metallic valve body materials can often be very effective corrosion prevention and control. In addition, Trunnion ball valve has an outer surface exposed to atmospheric corrosion, general steel materials to paint to protect.

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.

Trunnion ball valves

Two-axis ball belongs to the high-pressure Trunnion ball valve  series, the compact features of the structure of the Instrument needle valves, 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.

Advantages of manual ball valve

High pressure 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.
Manual valve in the pipeline is mainly used for cutting, distribution and change the flow direction of the medium. Ball is a new type of Instrument needle 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 High pressure 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.

The performance advantage of the fixed ball valve:

1, the operation is labor-saving: ball support, composed of upper and lower bearings to reduce friction, due to the elimination of the great seal load inlet pressure to promote the ball with the sealing seat formation caused by excessive torque.
2, reliable sealing performance: PTFE unisexual material sealing ring is embedded in the Stainless steel needle valves seat, metal seat end with the spring to ensure adequate pre tightening force of sealing ring, valve sealing surface is abraded during use, in the spring under the action of the valve to ensure good sealing performance.
3, structural fire protection: to prevent the sudden appearance of heat or fire, burn the PTFE sealing ring, large leak occurred, and contribute to the fire, in the ball and Needle valve seat sealing ring is arranged between the fire, when burned in the ring, under the action of the spring force, will quickly push the ball valve seat sealing ring, the formation of metal and metal seal, to a certain degree of sealing effect. Fire test to meet the requirements of APl6FA and APl607 standard.
4, automatic pressure relief feature: when the medium pressure cavity inside the valve is much higher than the pre] spring force, the seat back from the ball, to the effect of automatic pressure relief, pressure relief valve seat after automatic complex
5, a drain line: all set vent valve body, valve seat can check whether leakage occurs in the work, the valve is fully open or fully closed, remove the pressure in the chamber, can be directly replace packing; can cavity left in emissions, reduce pollution medium on the valve.