Butterfly valve refers to the closing part (disc or butterfly plate) for the disc, revolving around the valve axis to reach the opening and closing of a valve, in the pipeline mainly cut off and throttle role. Butterfly valve headstock is a disc-shaped butterfly plate, in the body around its own axis rotation, so as to achieve the purpose of opening or adjusting. Butterfly valves are suitable for the transmission of various corrosive and non-corrosive fluid mediums in the furnace, gas, natural gas, liquefied petroleum gas, city gas, hot and cold air, chemical smelting and power generation environmental protection, and are used to regulate and truncate the flow of media.

The Worm wheel flange butterfly valve is suitable for transporting various corrosive and non-corrosive fluid medium in the furnace, gas, natural gas, liquefied petroleum gas, city gas, hot and cold air, chemical smelting and power generation environmental protection system, which can be used to regulate and truncate the flow of medium.

Characteristics of the worm wheel flange butterfly valve: 1, butterfly valve has a simple structure, small size, light weight, material consumption, small installation size, switch quickly, 90° reciprocating rotation, small driving torque, etc., used to cut, connect, adjust the media in the pipeline, with good fluid control characteristics and close sealing performance. 2, butterfly valve can transport mud, at the mouth of the pipeline to accumulate liquid minimum. Under low pressure, good sealing can be achieved. Good adjustment performance. 3, butterfly plate streamlined design, so that the loss of fluid resistance is a small energy-saving products. 4, valve stem for the rod structure, after the quality treatment, has a good comprehensive mechanical properties and corrosion resistance, abrasion resistance. Butterfly valve at the opening and closing valve stem only for rotation movement and not for take-off and landing operation, stem filler is not easy to destroy, sealed reliable. and the butterfly plate cone pin fixed, the outside extension end is the anti-punching type design, lest when the stem and the butterfly plate connection accident Break when the stem collapses. 5, the connection method has the flange connection, to the clamp connection, to the welding connection and the lug to clamp connection.

Advantages：

1, open and close convenient fast, labor-saving, small fluid resistance, you can often operate.

2, the structure is simple, the outline size is small, the structure length is short, the volume is small, the weight is light, applies to the big caliber valve.

3, can transport mud, at the mouth of the pipeline to accumulate liquid minimum.

4, low pressure, can achieve good sealing.

5. Good adjustment performance.

6. Full-time valve seat channel effective flow area larger, less fluid resistance.

7, open and close torque is small, because the rotating shaft on both sides of the disc is basically equal to the role of the medium, and the direction of the opposite torque, so the opening and closing more labor.

8, sealing surface materials are generally used rubber, plastic, so low pressure sealing performance.