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2020

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04

Principle of pneumatic gate valve Working principle of pneumatic gate valve

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The pneumatic gate valve is equipped with a pneumatic actuator and driven by compressed air to control the gate valve . The valve core is composed of a wedge-shaped parallel structure and is suitable for emergency cutting and discharge of gas and liquid transportation pipelines.

Introduction to pneumatic gate valve:

The pneumatic gate valve is equipped with a pneumatic actuator and driven by compressed air to control the gate valve . The valve core is composed of a wedge-shaped parallel structure and is suitable for emergency cutting and discharge of gas and liquid transportation pipelines.

Working principle of pneumatic gate valve:

When using the air source to operate the gate valve, the small handle on the manual device must be moved to the pneumatic position, so that the opening and closing nut and the screw rod are pushed apart. When the compressed air enters from the upper pipeline of the cylinder, the piston and piston rod in the cylinder are pushed straight to the When the compressed air enters from the lower pipe, the gas pushes the piston and piston rod in the cylinder to move upward, and at the same time drives the valve rod to move upward to open the valve. When there is no air source, the screw rod and the opening and closing nut can be used to open and close the valve. First, put the upper and lower intake pipes of the cylinder in the exhaust state, then turn the small handle of the manual part to the manual position, so that the opening and closing nut and the screw rod are in the exhaust state. In the normal meshing state, turn the large handwheel of the manual part at this time. When the handwheel is turned clockwise, the valve is closed. When the handwheel is turned counterclockwise, the valve is opened.

When the air source is introduced from the upper air inlet, the valve stem drives the valve plate to move downward, and the valve stem drives the valve plate to move upward, and the valve opens.

 

Pneumatic gate valve parameters:

Actuator: cylinder piston structure;

Optional accessories: manual device, filter, solenoid valve, transmitter, control box;

Main materials: ductile iron, cast steel, stainless steel;

Caliber: DN50-500;

Pressure: PN1.6-6.4mpa;

Temperature: Q-29~350℃, C-29~450℃, P-30~540℃;

Media range: water, steam, oil, gas, fluid, media containing hard particle impurities, etc.