1. As our key product, dual eccentric flange type butterfly valve has been given continuous improvement and obtained Chinese National Patent(ZL No: 02284270. 5). It has advantages of corrosion-proof, perfect sealing performance and long usage period, being widely used in vessels/containers holding corrosive/non-corrosive liquid, semi/fluid, gas, powder, etc, in a variety of industries such as petroleum, metallurgy, power plant, food, medicine, textile, water supplying/drainage, paper making, ship building, environmental protection, etc.
2. Design reference:
General design complies with MSS-67-1995
ANSI/AWWA C 504
BS593
DIN3840
Flange connecting complies with ASME/ANSI B16.5-1992
ASME B16. 47-1996
BS4504
DIN2532
Face to face length complies with ASME B16.10-1992
BSEN 558-2
DIN3202
Pressure testing complies with API 598-1998
BS5417
DIN3230
3. Electrical operated butterfly valve can be sorted into explode-proof type or common type. When placing an order, customers are expected to specify their preferences regarding these respects.
4. At receipt of customer specified requirements, we can design and manufacture valves with special materials, specifications, pneumatic/hydraulic/pipe-net-suiting operator, which may be beyond this introduction.
Dual Eccentric Flange Type Butterfly Valve