Brief characteristics of pneumatic valve piston disc spring security

piston pneumatic valve disc spring security is also called spring safety pneumatic valve with external loads. This security pneumatic valve is in general spring loaded safety valves on the basis of development, main characteristics, there are two: one is spring into a disc, the second is the upper part of the pneumatic valve stem is equipped with piston, using compressed air to push the piston to move up and down. Security control pneumatic valve in addition to the degree of compaction by spring since the outside pressure, but also by compressed air forces the pistons to control its movements.

this security pneumatic valve in the normal operation of the boiler, in addition to rely on spring to pneumatic pressure in the pneumatic valve core seat, also by compressed air pressure in the upper part of the piston will pressure pneumatic valve core, it improved the rigor of safety pneumatic valve, and extend use was ordered to reduce leakage phenomenon. When the boiler pressure pneumatic valve to a safe action pressure, under the effect of compressed air, the security of pneumatic valve open vent steam quickly. When pressure is reduced, compressed air and can switch to the upper piston, make security pneumatic valve closed. Because of the security pneumatic valve opening and closing quickly, can avoid or reduce in the process of opening and closing of the blow loss degree of the sealing surface.

piston disc spring security pneumatic valve opening and closing with sensitive, rigor, the advantages of long orders, used in some large capacity boiler.