What do the specifications and models of pneumatic gas butterfly valve d971x for paper mill mean? 3、 Installation and maintenance of butterfly valve
1. During installation, the valve disc shall be stopped at the closed position.
2. The opening position shall be defined according to the rotating angle of the butterfly plate.
3. For butterfly valve with inlet valve, the inlet valve shall be opened before opening.
4. The installation shall be carried out according to the installation and use instructions of the manufacturer, and the butterfly valve with net weight shall be set with solid foundation.
5. The butterfly plate of the butterfly valve is installed in the straight direction of the pipeline. In the cylindrical safety channel of the butterfly valve body, the disc shaped butterfly plate rotates around the center line with a rotation angle of 0 °~90 °. When the angle of rotation reaches 90 °, the valve is fully opened.
6. If the butterfly valve is specified as a flow monitoring application, the key is to properly select the valve size and type. The basic principle of butterfly valve structure is especially suitable for making large diameter valves. Butterfly valves are not only used in general industrial production such as crude oil, liquefied gas, chemical plants and sewage treatment, but also used in the cooling system of thermal power plants.
7. There are two common butterfly valves: wafer type butterfly valve and flange type butterfly valve.
Wafer type butterfly valve uses stud bolts to connect the valve between two pipeline flanges. Flange type butterfly valve uses anchor bolts to connect looper flanges on both sides of the valve to pipeline flanges.
8. The butterfly plate of the butterfly valve is installed in the straight direction of the pipeline. In the cylindrical safety channel of the butterfly valve body, the disc shaped butterfly plate rotates around the center line with a rotation angle of 0 °~90 °. When the angle of rotation reaches 90 °, the valve is fully opened.
、 For example, pneumatic butterfly valves can be divided into four types according to their structural forms: offset plate type, vertical plate type, inclined plate type and lever type. According to the sealing form, it can be divided into soft sealing type and hard sealing type. The soft seal is rubber ring seal, and the hard seal is metal ring seal. According to the connection form, it can be divided into flange connection and wafer connection. The transmission mode can be divided into manual, gear transmission, electric, hydraulic and electric.
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