structural characteristics

The midline butterfly valve structure has a concentric butterfly plate and valve seat within a 360 ° circumference, with bidirectional sealing function, and can freely adjust pressure and flow rate.

Fully lined with fluorine technology, the surfaces of the valve body, butterfly plate, and valve stem are all covered with F4 fluoroplastic layer, which has excellent corrosion resistance.

The four level loading elastic sealing structure ensures zero leakage inside and outside the valve through the combination of shaft head transition curve, O-ring seal, and elastic valve seat.

Pneumatic and manual dual drive mechanism, pneumatic actuator supports automation control, manual mechanism can be operated in emergency, improving operational reliability.

Adjustable elastic pin positioning, accurate positioning, simple structure.

Design specifications: comply with GB/T 12224 and HG/T 3704 standards.

Drive mode: pneumatic+manual (expandable to electric, worm gear transmission).

a. D641F4 fully lined type: valve body fully lined/butterfly plate fully lined

b. D641F46 fully lined type: valve body fully lined/butterfly plate fully lined layer

c. D641F46 semi lined type: valve body fully lined/butterfly plate made of corrosion-resistant stainless steel (unlined)

execution standard

Design and Manufacturing: GB/T 12224, HG/T 3704

Structural length: GB/T 12221

Flange size: HG/T 20592/ASME B16.5

Pressure test: GB/T 13927

Logo: GB/T 12220

Supply: JB/T 7928