D643H Pneumatic Flange Hard Seal Butterfly Valve

overview

The D643H pneumatic butterfly valve is controlled by pneumatic means and is suitable for situations where the closing or opening time of the clamp is extremely strict. With appropriate accessories, it can be used for situations where immediate cut-off is required.

D643H - (6, 10) C, P, R, V pneumatic flange hard seal butterfly

2、 Characteristics of Pneumatic Flange Butterfly Valve

1. Pneumatic flange butterfly valve has a simple, compact structure, light weight, easy installation and disassembly, and convenient maintenance;
2. The three-dimensional core structure makes the butterfly plate tighter as it is closed, and its sealing performance is reliable, achieving no leakage.
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;
5. This butterfly valve has a unique structure, and the "switch" can be completed by simply rotating the valve stem 90 °. High temperature resistance, low temperature resistance, corrosion resistance, flexible, convenient, labor-saving operation, not affected by the high or low pressure of the medium, reliable sealing performance.

3、 Pneumatic flange butterfly valve adopts standard

Design standard: GB/T12238-1989
Flange connection size: GB/T9113.1-2000; GB/T9113.2-2000 GB/T9115.1-2000； GB/T9115.2-2000
Structural length: GB/T12221-1989
Pressure test: GB/T13927-1992; JB/T9092-1999

4、 Pneumatic flange butterfly valve actuator

Adopting a new series of DA/SR pneumatic actuators, including double acting and single acting (spring reset), gear transmission, safe and reliable; The large-diameter valve adopts a series of AW type pneumatic actuators with fork type transmission, with a reasonable structure and large output torque. It has double acting and single acting types
1. Gear type dual piston, with large output torque and small volume.
2. The cylinder is made of aluminum material, which is lightweight and aesthetically pleasing.
3. Manual operating mechanisms can be installed at the top and bottom.
4. The rack and pinion connection can adjust the opening angle and rated flow rate.
5. The actuator can be equipped with live signal feedback indicators and various accessories to achieve automated operation.
6. The IS05211 standard connection provides convenience for the installation and replacement of products.
7. The adjustable screws at both ends provide a ± 4 ° adjustable range for standard products between 0 ° and 90 °. Ensure synchronization accuracy with the valve.

5、 Pneumatic flange butterfly valve accessory options

According to different controls and requirements, the following attachments can be selected:
Cut off accessories: single electric control solenoid valve, dual electric control solenoid valve, limit switch feedback device.
Adjustable accessories: electrical locator, pneumatic locator, electrical converter.
Air source processing accessories: air filter pressure reducing valve, air source processing triad.

6、 Main technical parameters of pneumatic flange butterfly valve

7、 Main component materials of pneumatic flange butterfly valve

8、 Characteristics and principles of three eccentricities in pneumatic flange butterfly valves

1. Deviation from the center of the pipeline. 2. Deviation from the center of the sealing surface. 3. A tilted cone shape. When the valve is opened, the butterfly plate comes into instant contact with the valve seat when it is closed, and the eccentricity 1 and eccentricity 2 of the butterfly plate quickly detach from the valve seat, reducing the wear of the sealing pair, reducing the friction torque, and making it flexible to open. Eccentric cone surface 3 enables the butterfly plate to pass through the inner hole of the valve seat and achieve contact sealing when the valve is opened or closed. In addition, the rotation radius of the conical butterfly plate is greater than the rotation radius of the sealing pair contact position, so the butterfly plate will become tighter and tighter when the valve is closed, which can achieve self-locking and prevent the butterfly plate from exceeding its position.

9、 Dimensions of D643H Pneumatic Elastic Metal Sealed Butterfly Valve