Insulation ball valve is a relatively new type of ball valve type, it has its own unique structure some advantages, such as switch frictionless, seal is not easy to wear and open-close torque is small. Which can reduce the distribution of the specifications of the actuator. With multi-turn electric actuators, which can realize to adjust the medium and carefully cut off. Widely used in petroleum, chemical industry, urban water supply and drainage and other demanding cutting conditions. Fluid resistance is small, its resistance coefficient with section of equal length. Simple structure, small volume, light weight. Compact and reliable, the widespread use of plastic ball valve sealing surface of materials, good sealing, also has been widely used in the vacuum system. Easy to operate, open and close quickly, from open to close just rotate 90 °, is advantageous for the remote control. Convenient maintenance, simple structure of ball Industrial Valves, sealing ring, which generally remove replacement is more convenient. In full open or full close, sphere and valve seat sealing surface and the dielectric isolation, medium through, does not cause the valve sealing surface erosion. Applicability is wide and size from small to several millimeters, big to a few meters, from high vacuum to high pressure can be applied. Ball rotated 90 degrees in the inlet and outlet should be completely present spherical, thereby blocking flow. Existing technology in the field of thermal insulation ball valve is also called the jacket ball valve, is on the basis of the ball valve welding metal jacket, jacket and the valve body between thermal channel, channel and injecting steam or other heat medium, to ensure that the media can work normally in the valve. Insulation ball valve with good insulation properties, and the valve and pipe diameter, and can effectively reduce the pipeline heat loss in the media. Is mainly used in petroleum, chemical, metallurgical, pharmaceutical, food and other kinds of systems, in order to transport under normal temperature solidification of high viscosity medium. Due to the valve seal structure and its corresponding sealing material, its use is less than the temperature of 200 ℃. And for a long time at 200 ℃ under the condition of use, live shorter lives. Although seat can choose short time ability 300 ℃ high strength graphite materials, but there are many need to seal in the valve parts still cannot seal in high temperature situation, especially in the radial sealing, high strength graphite materials not suitable for radial seal. Usually radial sealing insulation ball valve is to use o-ring sealing structure, so use temperature of the valve directly restricted by o-ring used temperature, the thermal insulation ball valve on the use of o-ring is fluorine rubber, and the use of fluorine rubber temperature within 200 ℃, and cannot be used within the limit temperature for a long time. Far cannot satisfy the requirement of market in many media, such as the working medium of rosin, it demands the use of thermal insulation ball valve temperature is 300 ℃, such ability is helpful for medium to obtain ideal liquid rosin, using o-ring as traditional sealing parts, will not be able to meet their requirements. According to the problems existing in the insulation ball valve, make sure to improve the insulation ball valve sealing material and structure. ( 1) In a sealed cavity with high temperature resistant material of flexible graphite seal ring, at the back of the sealing ring with a taper section of the gasket, washer fitted behind the special structure of the screw, so by tightening the plug, plug will be passed to the gasket, washer cone section will squeeze the sealing ring, sealing ring deformation, make its tiejin, both inside and outside the radial bearing ring and body, so that insulation ball valve in the radial sealing structure of high temperature resistant, at the same time, by tightening the screw, produce pre tight seal between the sphere and valve seat, make its seal. ( 2) Also make corresponding improvement on the seat sealing structure, the insert structure, and the body bearing ring grooves dug up, groove bottom in sealed superior performance and high temperature resistance of the flexible graphite, can play a role at the bottom of the seat seal, and can play between the sealing deputy for heat bilges cold shrink compensation effect. In flexible graphite is mounted on the high temperature resistant metal seated, use long time use within temperature to 425 ℃ can be improved, so as to solve the thermal insulation ball valve cannot be used at 200 ℃ or more long time. And it also could be selected according to the requirement of the actual working condition of different material seat ( 3) Drain role at the bottom of the pipe and plug is threaded connection, when the temperature rises, the threaded portion of seal is hard to guarantee, decided to cancel the plug, plug, which is connected with the bottom to take over the change in terraced drain plug, end connection with winding gasket seal, to ensure that at the bottom of the sealing reliability. Insulation ball valve type eccentric Q340F/H half ball valve fluorine-butterfly Q41F ball valve Q41F46 plastic ball valve - 6年代,Q11F - 6年代,Q61F - 6 s QP41F discharge ball valve, long QP41M pipeline ball valve, spray pulverized coal ball valve, discharge ball valve MQ647, MQ47 KQ347Y sulfur ball valve. V-shaped ball valve VTQ41 Italian ultra-thin Q71 vacuum ball valve, ball valve, wafer ball valve internal thread ball valve, 2, 3 Q11 type ball valve, ball valve spring type ball valve, track ball, double ball valve, a scale adjustable ball valve.
have manifold water gate valve effects, ranging from resilient gate valve to os gate valve.
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