And the difference between the pneumatic valve and globe valve breaker in where?

Breaker


the pneumatic valve and globe valve is the two most commonly used shutoff with pneumatic valves.
, layout is not the same. Breaker pneumatic valve than by the pneumatic valve and disorderly layout, height scale is larger, from the appearance than by the pneumatic valve and pneumatic valve breaker short and high, especially the rising stem and the height of the pneumatic valve demand higher space, breaker in the equipment selection should pay attention to the space limited circumstances.
and sealing surface is not the same. Breaker pneumatic valve in the open and closed when the pneumatic valve core and pneumatic valve seat sealing surface has been touch and rub each other, so simple sealing surface wear, particularly in the pneumatic valve in near closed, pressure difference is very big, before and after pneumatic valve core sealing surface wear is more serious; Pneumatic valve pneumatic cut-off valve disc in open circumstance, if it's between the pneumatic seat and clapper sealing surfaces, no longer touch, so its sealing surface mechanical wear and tear is small, but if the medium is rich in solids, simple damage the sealing surface. Breaker pneumatic valve sealing surface must be self sealing ability, the pneumatic valve core by medium pressure and pneumatic valve seat sealing surface touch tightly, not to close. Wedge and pneumatic valve pneumatic valve core slope general breaker is ~ degrees, when excessive forcibly closed or temperature changes large pneumatic valve core is simple. So, high temperature and high pressure pneumatic valve wedge knife switches, on the layout are taken must avoid pneumatic valve core is jammed. As pneumatic valve sealing surface, it is necessary to impose force closed talents to pneumatic valve seal, in the same diameter, working pressure, and under the same driving equipment, by the pneumatic valve breaker for the drive torque of pneumatic valve. ~。 Times. This point in the electric pneumatic valve torque adjustment control institutions, should be attention. As pneumatic valve sealing surface, as long as in the completely closed touch each other, forcibly closed pneumatic valve core and the sealing surface of relative slip is very small, so the sealing surface wear is small. Pneumatic valve sealing surface wear, as most because pneumatic valve core and the sealing surface before have sundry, or because not close, the closed situation lead to medium caused by the high-speed scour.
, flow resistance is not the same. Breaker pneumatic valve fully open in the whole flow channel, at the moment of medium loss minimum working pressure, compared with the pneumatic valve, it is the first advantage of fluid flow resistance is small, the activities of the general pneumatic valve breaker drag coefficient is about. ~。 , and generally as the resistance coefficient of pneumatic valve is about. ~。 。 Open the sealing force is small. Pneumatic valve is generally applicable to the breaker, not demand often opening and closing, and insists on the condition of full open or full close gate, improper tonic, save to use. Pneumatic valve in the whole trip as the flow resistance is very big, unbalanced force is big, the required driving force or torque is much big accordingly. But it is very suitable as a tonic, save of the fluid. About the activities of medium, gate open in some cases, can cause the oscillation of pneumatic valve, and oscillation, and can damage the gate and pneumatic valve seat sealing surface, and save, can make the gate medium of erosion.