Worm Gear Flanged Metal Seated Butterfly Valve

Worm Gear Flanged Metal Seated Butterfly Valve

ZFV worm gear flanged metal seated butterfly valve. Ordinary three-eccentric multi-level metal seal seal butterfly valve, it takes from two or more layers of metal and non-sheet metal composite to made of sealing ring, the ring and bolts fixed on the butterfly plate. This structure of the...

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ZFV worm gear flanged metal seated butterfly valve. Ordinary three-eccentric multi-level metal seal seal butterfly valve, it takes from two or more layers of metal and non-sheet metal composite to made of sealing ring, the ring and bolts fixed on the butterfly plate. This structure of the laminated metal hard seal butterfly valve, due to the sealing ring on the non-metallic sheet of physical and chemical properties, can only be used to the general non-high temperature and non-high pressure and non-corrosive conditions. But in case the pipeline pressure is higher, the media flow become faster, valve disc is partially open or all open state, the high-speed fluid on the seal ring in disc produce a positive erosion, which cause sealing ring on the non-metallic sandwich wear and even fall off, Greatly affect the valve sealing performance. When the pipe medium is corrosive, the sealing ring on the non-metallic interlayer vulnerable to corrosion of the media, causing the valve seal surface leakage. ZFVI research and develop metal bracelet butterfly valve (also known as all-metal seal butterfly valve) after years to overcome the the various shortcomings of ordinary three eccentric multi-level metal hard seal butterfly valve, the salient features are: 

1. sealing ring entirely made of metal , There is no PTFE, graphite, rubber, asbestos and other non-metallic materials , in condition that the valve in full open or partially open, the seal ring will not damage caused by high-speed fluid erosion, which greatly improved valve using life.

2. Use all the metal materials for sealing part, can be suitable to high temperature (≤ 800 ℃), low temperature (≥-196), high pressure(≤ PN260 / Class 1500), corrosive and other harsh conditions.

At present, we can produce three eccentric metal seated butterfly valve, specifications range DN80-500, NPS3-20, pressure range PN6-25,150LB-300LB.


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