Extraction non-return pneumatic valve and an outline of the structure

extraction non-return pneumatic valve function is unitary, but indispensable, below is the effect on extraction non-return pneumatic valve and an outline of the structure.
extraction non-return pneumatic valve closed: when extraction non-return pneumatic valve receives the closed, compressed air electromagnetic tee pneumatic valve is opened, the compressed air and steam extraction non-return pneumatic valve on the piston chamber connected, rely on the compressed air to overcome the spring force and the effect of steam pressure using a joystick down, forcibly closed non-return pneumatic valve;
extraction non-return pneumatic valve open: when extraction non-return pneumatic valve receives the open, compressed air electromagnetic tee pneumatic valve action, make the extraction non-return pneumatic valve piston chamber on the compressed air and exhaust port connected, drain off compressed air of the air chamber, the spring force using a joystick upward to freedom, when there is a steam through pneumatic butterfly valve, relying on open steam force non-return pneumatic valve.
the role of a pneumatic valve, extraction non-return overview
steam turbine extraction non-return door has very important significance in the line. Because when the steam turbine load rejection, they protect the turbine is not due to steam backflow speeding, and prevent the heater and pipe water into the steam turbine.
2, extraction non-return structure of the pneumatic valve overview
extraction non-return gate has two forms.
and regenerative extraction non-return door on the road;
and the other is through the large flow of high pressure cylinder exhaust tube flap type non-return door on the road.
the two extraction non-return pneumatic valve is controlled by water pressure as a driving force. In order to realize the remote and automatic closed water locking function set a set of control system, hereinafter referred to as non-return door pressure transmitter.
①。 The design and manufacture ANSIB acceptance criteria adopted. , E or JB/T, strength and sealing performance completely conform to the standard needs, the vacuum pneumatic valve and vacuum test, the whole life to meet user requirements.
2. Pneumatic valve is designed for the rocker connection with pneumatic valve stem, but with pneumatic valve seal face since the rightness of, ensure the sealing face.
3. Aimed at different temperature, the main body material is carbon steel or high temperature steel, cemented carbide surfacing sealing surface.
4. Pneumatic valve is equipped with damping heavy hammer, can balance the closed kinetic moment, prevent not hammer.
5. Pneumatic valve seat sealing surface inclination Angle, reduce shut down time, lighten the impact, protect the security of the equipment itself and the pipe.
6 pneumatic valve body cavity with streamline design, flow capacity, reduce the resistance of pneumatic valve.
7 is spring return type actuator cylinder or hydraulic cylinder, and with the pneumatic valve closing action is relatively independent, actuator failure does not affect the closing action.
end closing open sets limit mechanism, avoid open a bit damaged.
pet-name ruby ring hydraulic cylinder cylinder wall coating wear-resisting corrosion resistant layer, can increase longevity, reduce resistance, pneumatic valve, flexible and reliable. 。 Equipped with pneumatic actuator, pneumatic valve switch position signal output valve open position on indicator.