Single acting pneumatic gate valve size

The Z6S41 series pneumatic wedge gate valve is a low support rising stem gate valve with a pneumatic actuator (double-layer cylinder with buffer mechanism) and a manual and its protective mechanism (manual and self-locking pneumatic manual conversion device). Due to its double-layer cylinder structure, this valve has doubled the lifting force compared to single cylinder pneumatic gate valves. This fundamentally solves the problem of some valve bodies of single cylinder pneumatic gate valves being wedged and unable to open. Moreover, due to the buffering mechanism of the valve, it can effectively reduce the wear and tear on the sealing surface of the valve plate and valve body caused by the downward impact of the piston when closing the valve. At the same time, it can also avoid the phenomenon of the gate plate getting stuck.

Structural principle of Z6S41 pneumatic but action gate valve

This series of products uses purified compressed air at a working pressure of 0.4-0.6MPa (gauge pressure) to push the piston and drive the gate to move perpendicular to the fluid, achieving the purpose of opening and closing the valve. The working principle of the cleverly designed double-layer cylinder and buffer mechanism is described in four stages according to the operation of the gate plate:

1. Before the gate valve is opened, the piston of the upper cylinder (hereinafter referred to as the upper piston) and the piston of the lower cylinder (hereinafter referred to as the lower piston) are simultaneously subjected to force. The valve stem, under the push of the upper and lower pistons, overcomes the maximum static friction between the sealing surface of the gate plate and the sealing surface of the valve body with nearly twice the lifting force of a single piston, and drives the gate plate to rise. Compressed air flows from the lower chamber of the upper cylinder, passes through a specific channel set in the partition, and reaches the lower chamber of the lower cylinder through a connecting pipe, pushing the upper and lower pistons to work simultaneously. The gas in the upper chamber of the lower cylinder passes through another specific channel set inside the partition. Smooth and unobstructed discharge from the cylinder body.

2. The later stage of gate valve opening: After the gate valve is slightly opened, the lower piston runs to the top dead center, and the gate valve continues to lift under the drive of the upper piston until it reaches the fully open position.

3. The pre closing stage of the gate valve: Under the push of the upper piston, the gate leaves the fully open position and begins to descend.

4. The later stage of closing the gate: When the upper piston touches the lower piston protrusion and drives the lower piston to continue descending together, due to the obstruction of the intake channel of the upper chamber of the lower cylinder and the exhaust channel of the lower chamber of the lower cylinder, the downward speed is significantly slowed down, and the gate descends to the fully closed position. Slowing down the impact of the gate plate's downward movement, the valve can be closed tightly on its own without causing the valve plate wedge to become too tight. At the same time, it also protects the sealing surface from damage caused by violent impact.

A flexible and reliable pneumatic manual conversion mechanism, equipped with a pneumatic manual conversion mechanism on the upper part of the cylinder head. At any position during the opening and closing process of the gate valve, the operating handle can be easily rotated to directly switch from pneumatic to manual or from manual to pneumatic operation. The conversion operating handle adopts a positioning pin self-locking design, and after the handle is positioned, it is reliable and stable.

When the solenoid valve and its control circuit or air supply system fail, it can quickly switch to manual operation mode without the need for other auxiliary tools, ensuring the normal operation of the circuit and avoiding accidents. Before the completion of the self-control system in the new construction project, this series of gate valves can be reliably used as manual gate valves, with flexible and agile movements.

The closing time of the valve can be adjusted by adjusting the buffer mechanism installed on the partition, and the closing time of the gate can also be adjusted within a certain range.

Can be equipped with a feedback device

This product is directly supplied by the manufacturer. If special configurations are required (can be customized), please specify the following parameters in detail when placing an order:

(For example: valve type, driving method, connection form, structural type, nominal pressure, nominal diameter, input signal, sealing surface material, valve body material, applicable temperature, whether accessories are included)