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Double flanged type
Face to face length acc. To ISO5752 series 14(DIN3202 F4)
Flange dimension and drilling to ISO7005-2(DIN2501, EN1092-2)
Size: DN10--DN4000
Pressure: PN6--PN40;
Suitable medium: Water and low-corrosive liquid etc.

Usage
Bi-directional rubber seated butterfly valve(flange/extension/wafer type) was developed by our factory in 1991, it is widely used to throttle or adjust medium flow volume in industrial pipeline in the fields of water supply and drainage, petroleum, power and municipal construction.

Characteristics
1. Bi-directional rubber seated function, specially suitable for the working condition with two-way medium flow derection.
2. With the eccentric sealing structure, the valve possess the function of more closing more tight, and reliable sealing performance.
3. The material of valve body and butterfly disc main body is nodular cast iron, sealing material is stainless acid-proof steel and butane oil-proof rubber and long life usage.
4. The valve axle adopts semi-axle structure, butterfly disc structure is truss type, high strong butterfly board, big flow area, small resistance and little consumption of energy.
5. Worm gear driving equipment is completely sealed, and is used in water for long time, and swift operation