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The plastic butterfly valve is a kind of valve which use the round disc as the opening and closing parts and turns with the stem to open, close . It has the advantages of simple structure, light weigh, small installation size, fast switch, 90 ° reciprocating rotation, small driving torque, etc., which is used for cut-off, and regulating the medium in the pipeline, and has good fluid control characteristics and closing sealing performance.
Plastic butterfly valve stem is straight through rod structure, made of stainless steel, with good comprehensive mechanical properties, corrosion resistance and scratch resistance. When operate butterfly valve, the stem only rotates without lifting, the packing of the stem is not easy to be damaged, and the sealing is reliable. The plastic butterfly valve disc without pin to prevent medium from entering the valve rod. The connection of plastic butterfly valve is mainly wafer. The operate method by manual, worm gear drive, electric, pneumatic, etc., which can realize remote control and automatic operation.
The plastic butterfly valve has features as follows:
1. The valve body of plastic butterfly valve only needs the minimum installation space, and working is simple and reliable;
2. Approximately equal percentage flow characteristics, which can be used for regulating or switching control;
3. The valve body of the plastic butterfly valve matches the standard pipe flange;
4. The superior economic performance makes the application industry of butterfly valve the most extensive;
5. The plastic butterfly valve has a large flow capacity, and the pressure loss through the valve is very small;
6. The plastic butterfly valve is especially suitable for the liquid with cleaner medium.
Plastic butterfly valve is widely used in the transportation of liquid in various types of industrial pipelines. It has severe corrosive media, such as sulfuric acid, hydrofluoric acid, phosphoric acid, chlorine, strong alkali, aqua regia and other highly corrosive media.
But plastic butterfly valve also have some disadvantages as follows:
1. working pressure is low, usually below 1.6Mpa.
2. Working temperature is small low based on material property of PVC, CPVC, PVDF, PPH.
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August 02, 2022
August 02, 2022
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