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.

Advantages of manual ball valve

High pressure needle 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 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.

Instrument valve

Instrument valve manifolds valve is a pipeline accessory. It is used to change the channel section and flow direction of medium, control of a device for conveying medium flow.  The sealing performance of Instrument manifolds valve instrument valve refers to the part of the sealing ability to prevent media leaks, it is the technical performance index of instrument valve is the most important. Sealing parts instrument valve has three parts: opening and closing parts at the contact and valve seat sealing surface between the two; filler stem and the stuffing the distribution and office; valve connection with the valve cover. The first one is called the leak within the leak, which is usually known as Guan lax, it will affect the ability of instrument valves truncated medium. For the truncated valve, the internal leakage is not allowed. Leakage after the two called the leakage, that media leaks from the valve to the valve outside. Leakage will result in material loss, pollution of the environment, can also cause serious accidents. The explosive, toxic or radioactive medium, leakage is allowed, and thus the instrument valve must have a reliable sealing performance.

Stainless steel needle valve of the course

Stainless steel needle valve refers to the amount of relying on its own motion and automatic referral opening and closing the valve, check valve lift amount has stopped mediated backflow valve. Check valves are an automatic valve, its tail to be mediated by impulse is to stop the amount back, stop the pump and drive motor reversal,High pressure ball valve the war put a container full amount of referrals. Stainless steel needle valve refers to the amount of relying on its own motion and automatic referral opening and closing the valve, check valve lift amount has stopped mediated backflow valve. Check valves are an automatic valve, its tail to be mediated by impulse is to stop the amount back, stop the pump and drive motor reversal, Valve manifolds the war put a container full amount of referrals. Stainless steel needle valve of the valve disc-shaped, around the shaft for rotational movement of the seat channel, due to internal valve passage into a streamlined, smaller than a liter of active resistance butterfly valve for low flow rates and infrequent events changes in large-caliber place, but not for pulsatile flow, the sealing performance is less than lift.