Product Features

(1) The pneumatic hard seal butterfly valve adopts a three eccentric sealing structure, with almost no wear on the valve seat and butterfly plate, and has a sealing function that becomes tighter as viewed.
(2) The sealing ring is made of stainless steel, which has the dual advantages of metal hard sealing and elastic sealing. It has excellent sealing performance in both low and high temperatures, corrosion resistance, and long service life.
(3) The sealing surface of the butterfly plate is made of welded cobalt based hard alloy, which is wear-resistant and has a long service life
(4) The large-sized butterfly plate adopts a frame structure with high strength, large overcurrent area, and low flow resistance.
(5) Pneumatic hard seal butterfly valve has bidirectional sealing function, which is not limited by the flow direction of the medium or the spatial position during installation, and can be installed in any direction.
(6) The pneumatic device can be installed in multiple stations (rotating 90 ° or 180 °), making it easy for users to use.

Product Selection

(1) Valve body parameters: nominal diameter, working pressure, process medium, usage scenario, valve body material, and other series of parameters.
(2) Actuator parameters: actuator form, control mode, control signal (4-20mA, 1-5V), action mode (air open, air closed)
Please provide the above technical parameters as detailed as possible to facilitate our company's production and technical personnel to accurately select for you. If you have any questions You can call us and we will do our best to provide you with high-quality service!

Pneumatic Hard-Sealed Butterfly Valve Technical Parameters

Pneumatic Hard-Sealed Butterfly Valve Actuator Parameters

The new series of pneumatic actuators are adopted, including double acting type and single acting type (spring return), with gear and rack transmission, which is safe and reliable; Large-diameter valves adopt the series AW type pneumatic actuator with fork transmission, which has a reasonable structure, large output torque, and includes double acting type and single acting type.
1. Gear-type double piston, with large output torque and small volume.
2. The cylinder is made of aluminum alloy material, with light weight and beautiful appearance.
3. Manual operation mechanisms can be installed on the top and bottom.
4. The rack connection can adjust the opening angle and rated flow.
5. The actuator can be optionally equipped with electrical signal feedback indication and various accessories to achieve automatic operation.
6. The ISO5211 standard connection provides convenience for the installation and replacement of products.
7. The adjusting screws at both ends can make the standard product have an adjustable range of ±4° at 0° and 90°. Ensure the synchronization accuracy with the valve.

Pneumatic Hard-Sealed Butterfly Valve Part Materials

Pneumatic Hard-Sealed Butterfly Valve Performance Specifications

Pneumatic Hard-Sealed Butterfly Valve Design Standards

Pneumatic Hard-Sealed Butterfly Valve Eccentric Principle

(1) Deviate from the pipe center
(2) Deviate from the sealing surface center
(3) Inclined cone
When the valve is opened, the butterfly plate contacts the valve seat instantaneously when closing. By using the two eccentricities of the butterfly plate (eccentricity 1 and eccentricity 2), it quickly disengages from the valve seat, reducing the wear of the sealing pair, with small friction torque and flexible opening. The eccentric cone surface 3 enables the butterfly plate to pass through the inner hole of the valve seat when the valve is opened or closed, achieving contact sealing. In addition, the rotation radius of the conical butterfly plate is larger than that of the contact position of the sealing pair. Therefore, when the valve is closed, the butterfly plate will be tightened more and more, achieving self-locking and preventing the butterfly plate from over-positioning.

Pneumatic Hard-Sealed Butterfly Valve Connection Dimension Diagram

Pneumatic Hard-Sealed Butterfly Valve Connection Dimensions

1. If the model has not been selected before ordering, please provide us with the operating parameters:
   (1) Nominal diameter DN (mm);
   (2) Nominal pressure (MPa or bar);
   (3) Fluid properties (including medium temperature, viscosity, or acidity/alkalinity);
   (4) Pressure before and after the valve (pressure differential);
   (5) Requirements for flow characteristics;
   (6) Materials of valve body and valve core;
   (7) Connection type;
   (8) Driving method (provide air supply pressure, driving voltage);
   (9) Supporting accessories (for pneumatic valves, it is recommended that users install an air filter triplet and a 2-position 5-way solenoid valve);
   (10) On-site working conditions.
2. If the product model of our company has been selected by the design unit, please order directly from our production department according to the model;
3. When the application occasion is very important or the pipeline is relatively complex, please provide the design drawings and detailed parameters as much as possible, and our experts will review and check them for you.