Piston disc spring characteristics of the safety of the pneumatic valve (3)

disc spring piston pneumatic valve, but also because of the spring is famous one plus safety pneumatic valve. The pneumatic valve spring loaded on the basis of general safety development of pneumatic valves, there are two main characteristics: first, change the disc spring, second, do the upper piston, use compressed air to push the piston moves up and down. In addition to compression control pneumatic valve consists of a seat from its pressure, compressed air driven piston spring degrees can control its movement. Boiler safety pneumatic valve, pneumatic valve core, in addition to the pressure in the normal operation of a spring on the seat, but also by the effect on the pressure on the piston to the compressed air pressure, pneumatic valve core does not improve the strict security pneumatic valve, reduce the leakage phenomenon, and extend the command used. When the boiler pressure increases in the compressed air under the security pneumatic valve action, steam release pneumatic valve open. When the pressure drop, compressed air can switch to the on the pistons, pneumatic valve shut off. The pneumatic valve quickly opened and closed, to avoid or mitigate rev, closed the damage of the sealing surface in the process of the blow. Disc spring piston pneumatic valve has a start, as sensitive, nervous and, in some large capacity boiler being used for a long time, orderly make good use of advantages. Keywords:
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