The working principle of eccentric half ball valve
Half of an eccentric valve working principle:
1, the half of an eccentric valve by valve body, eccentric shaft, valve cover, spherical cap, bushings, valve seat main parts, such as by eccentric shaft rotate 90 ° of the valve opening and closing, have the effect of truncation medium.
2, and half of an eccentric valve guarantee the valves in the process of opening or closing, the valve seat and the spherical cap without rubbing against each other, half of an eccentric valve adopts eccentric crankshaft, making the center line of the spherical cap deviates from the center line of the valve port a eccentricity. When the valve opens, the crankshaft turns a small Angle, the ball will leave the seat, the ball and seat no longer contact; On the other hand, in the process of valve closing, only in the closing moments, spherical cap and seat contact.
3.,and a half, eccentric ball valve, adopting the jacket structure in the process of maintenance, do not need to be removed from the pipeline, simply remove bonnet bolts on, remove the valve cover, which can remove the eccentric shaft, so to ensure the valve to the online service.
4, rotate 90 °, rapid opening and closing, torque is small, convenient operation.
Half of an eccentric valve can be widely applied in the drainage, petroleum, chemical, gas, gold, electric power, papermaking, thermal, and other industries, especially suitable for conveying containing particles, ash, fiber and other fluid medium using truncation of industrial pipe flow.
5, half of an eccentric valve should have sufficient strength, eccentric crankshaft are structure of trunnion mounted ball, no vibration under high velocity, shell test execution GB13927-1992 according to the national standards.
6, and a half, eccentric ball valves are not allowed to have leakage, upper and lower shaft end should be at least 2 O ring seal.
7, half of an eccentric valve has the function of cutting, in the closed to the media clutter cut, branches, textile bags, etc.) to ensure the normal opening and closing of the valve.
Half of an eccentric valve its characteristics are as follows:
1, straight-through flow, small pressure loss, high efficiency and energy saving.
2, sealing surface hardness is high, can cut steel, prepare the content such as soft or hard sundries, and long service life.
3, metal sealed performance is reliable, eccentric structure is reasonable.
4, rotate 90 °, rapid opening and closing, torque is small, convenient operation.
Half of an eccentric valve can be widely applied in the drainage, petroleum, chemical, gas, gold, electric power, papermaking, thermal, and other industries, especially suitable for conveying containing particles, ash, fiber and other fluid medium using truncation of industrial pipe flow.
