Principle of pneumatic gate valve

Working principle of pneumatic gate valve
Introduction to pneumatic gate valve:
Pneumatic gate valve is equipped with pneumatic actuator and driven by compressed air to control the gate valve. The valve core is composed of wedge-shaped structure and parallel structure, which is suitable for emergency cut-off and discharge of gas and liquid transmission pipeline.
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 pulled to the pneumatic position to make the opening and closing nut and screw rod open. When the compressed air enters from the upper pipeline of the cylinder, it pushes the piston and piston rod in the cylinder to move downward in a straight line. The piston rod is connected with the valve rod, and the valve rod is pushed downward to close the valve. When the compressed air enters from the lower pipe, the gas is pushed The piston and piston rod in the cylinder move upward, and at the same time drive the valve stem to move upward to open the valve. When there is no air source, screw rod and split 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, turn the small handle of the manual part in the manual position, so that the opening and closing nut and the screw rod are in normal meshing state. At this time, turn the large hand wheel of the manual part. When the hand wheel is turned clockwise, the valve is closed. When the hand wheel is turned counterclockwise, the valve is closed Open the valve.
When the air source enters from the upper intake port, the valve rod drives the valve plate to move downward and the valve closes. When the air source enters from the lower air inlet, the valve rod drives the valve plate to move upward and the valve opens.
Parameters of pneumatic gate valve:
Actuator: cylinder piston structure;
Optional accessories: manual device, filter, solenoid valve, buzzer, control box;
Main materials: nodular cast iron, cast steel, stainless steel; caliber: dn50-500; pressure: pn1.6-6.4mpa;
Temperature: q-29-350 ℃, c-29-450 ℃, p-30-540 ℃;
Medium range: water, steam, oil, gas, fluid, medium containing hard particles and impurities.
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