The Z6S41T-10, Z6S41H-16, Z6S41H-25, Z6S41H-40, and Z6S41H-64 series pneumatic wedge gate valves are the latest products finalized by our factory. Because of its advanced technology, reliable performance, convenient operation, switching and maintenance, it has been widely used as a pipeline switching device for transporting gas and liquid media by petroleum, chemical, metallurgical, electric power, maritime and other departments.
Pneumatic with manual wedge gate valve is a low bracket rising stem gate valve with pneumatic actuator (double-layer cylinder with buffer mechanism) and 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 certain valve plates of single cylinder pneumatic gate valves being wedged inside the valve body and unable to open. Moreover, due to the buffering mechanism of the valve, it can effectively reduce the need to close the valve. The wear of the valve plate sealing surface and valve body sealing surface caused by the downward impact of the piston can also avoid the phenomenon of the gate plate getting stuck.
In order to cooperate with users to achieve operational automation, in addition to supplying this series of products, our factory can also provide separate cylinder blocks including brackets to help users modify the existing variety of manual gate valves. The cylinder block produced by our factory can be installed on the valve body cover of the manual gate valve to form a dual cylinder pneumatic manual dual-purpose gate valve.

Overview of Pneumatic Manual Wedge Gate Valve:
Working principle and characteristics
This series of products uses 0.4-0.6MPa (gauge pressure) purified compressed air as the working power, pushing the piston and driving the gate to make a displacement perpendicular to the fluid, achieving the purpose of opening and closing the valve. ú¹
The working principle of the double-layer cylinder and buffer mechanism is described as follows according to the four stages of gate valve operation: (Attached are schematic diagrams ¢Ù, ¢Ú, ¢Û, ¢Ü)
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 reaches 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. After the gate valve is closed, when the upper piston touches the lower piston protrusion and drives the lower piston to continue descending together, 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 significantly slows down the downward speed, and the gate plate 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.

Schematic diagram of working principle



A flexible and reliable pneumatic manual conversion mechanism is installed on the upper part of the cylinder head. The pneumatic manual conversion mechanism can easily rotate the operating handle at any position during the opening and closing process of the gate valve, directly switching 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 can be reliably fixed. 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. At the same time, 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, and the buffer mechanism installed on the partition can also adjust the closing time of the gate valve within a certain range.
Can be equipped with a feedback device
This valve can be equipped with an electric or pneumatic feedback device to send valve switch status information. Therefore, using this valve can achieve remote control, centralized control, and automatic control
The cylinder of this valve is made of seamless steel pipe, coated with corrosion-resistant hard chromium on the inner surface, and polished. It has the advantages of low friction, low corrosion resistance, high hardness, and long service life.
The sealing ring in the cylinder is made of nitrile rubber. Sealed ring with reliable sealing performance. Easy to replace during maintenance.

1. Valve body performance



2. Cylinder performance



3. Air consumption (purified compressed air pressure: 0.4MPa (gauge))



Note: The one-way air consumption of Z6S41T-10, Z6S41H-16, Z6S41H-25, Z6S41H-40, and Z6S41H-64 gate valves (calculated by compressed air volume)

Structure, Materials, and Instructions for Use
1. This valve mainly consists of a valve body, a valve cover, a gate plate, a valve stem, a sealing ring, a double-layer cylinder and its piston, a piston rod, a diaphragm, a buffer mechanism, a manual mechanism, a pneumatic manual conversion device, and a valve cover packing box device.
2. When the upper piston reaches the upper end of the stroke, it can push the upper feedback device to send a signal; The lower end of the stroke of the lower piston can push down the lower return indicator to send a signal, which will be displayed on the analog instrument panel in the central operating room as the opening and closing information of the gate valve.
3. The upward and downward movement of the outward extending indicator rod on the upper part of the handwheel indicates whether the gate of the valve is in a raised or lowered state. When the gate valve is closed, the extended indicator rod is located at the lowest position; On the contrary, when the gate valve is fully opened, the extended indicator rod is located at the highest position. This is the on-site indication of the opening and closing status of this valve.
4. The upper part of the cylinder head is equipped with a pneumatic CC manual conversion device. Turn the conversion handle clockwise to position the A pneumatic @ positioning hole, and the gate valve is in pneumatic operation mode; On the contrary, turn the conversion handle counterclockwise to position it at the A manual position at the hole, and the gate valve can be manually operated. The handle with bevel gear changes direction in the opposite direction.
When manually operating a gate valve, the handwheel rotates in the same direction as a typical manual valve, clockwise to close and counterclockwise to open. The opposite rotation of bevel gears.

4. Main component materials (see table below)



Z6S41H-25 Double Cylinder Pneumatic Wedge Gate Valve System Control Schematic


Appearance and dimensions