Taike valve butterfly valve can be divided into pneumatic butterfly valve, electric butterfly valve, manual butterfly valve, etc. Butterfly valve is a type of valve that uses a circular butterfly plate as the opening and closing component and rotates with the valve stem to open, close, and regulate the fluid channel. The butterfly plate of the butterfly valve is installed in the diameter direction of the pipeline. In the cylindrical channel of the butterfly valve body, the disc shaped butterfly plate rotates around the axis, with a rotation angle between 0 ° and 90 °. When the rotation reaches 90 °, the valve is fully open. Butterfly valve, also known as flap valve, is a simple structure regulating valve and can also be used for switching control of low-pressure pipeline media. Butterfly valve (English: butterfly valve) refers to a type of valve where the closing part (disc or disc) is a disc that rotates around the valve axis to achieve opening and closing. It mainly serves as a shut-off and throttling valve on pipelines. The butterfly valve opening and closing part is a disc shaped butterfly plate that rotates around its own axis within the valve body to achieve the purpose of opening, closing or adjusting. The butterfly valve is usually less than 90 ° from fully open to fully closed, and the butterfly valve and stem do not have self-locking ability. In order to position the butterfly plate, a worm gear reducer needs to be installed on the valve stem. The use of a worm gear reducer not only enables the butterfly plate to have self-locking ability and stop at any position, but also improves the operational performance of the valve. The characteristics of industrial butterfly valves are high temperature resistance, high pressure range, large nominal diameter, carbon steel body, and metal ring instead of rubber ring for valve plate sealing. Large high-temperature butterfly valves are manufactured by welding steel plates and are mainly used for high-temperature medium flue gas ducts and gas pipelines.
Butterfly valves can be divided into offset plate type, vertical plate type, inclined plate type, and lever type according to their structural form. According to the sealing form, it can be divided into two types: relatively sealed and hard sealed. The soft sealing type usually uses rubber ring sealing, while the hard sealing type usually uses metal ring sealing. According to the connection type, it can be divided into flange connection and wafer connection; According to the transmission mode, it can be divided into several types: manual, gear transmission, pneumatic, hydraulic, and electric.
1、 Advantages of Butterfly Valves
1. Convenient and fast opening and closing, labor-saving, low fluid resistance, and can be operated frequently.
2. Simple structure, small size, and light weight.
3. It can transport mud and store the least liquid at the pipeline mouth.
4. Under low pressure, good sealing can be achieved.
5. Good tuning performance.
2、 Disadvantages of Butterfly Valves
1. The operating pressure and temperature range are small.
2. Poor sealing performance.
3、 Installation and maintenance of butterfly valves
1. During installation, the valve disc should be stopped in the closed position.
2. The opening position should be determined according to the rotation angle of the butterfly plate.
3. Butterfly valves with bypass valves should be opened before opening.
4. Installation should be carried out according to the manufacturer’s installation instructions, and heavy butterfly valves should have a solid foundation.
5. The butterfly plate of the butterfly valve is installed in the diameter direction of the pipeline. In the cylindrical channel of the butterfly valve body, the disc shaped butterfly plate rotates around the axis, with a rotation angle between 0 ° and 90 °. When the rotation reaches 90 °, the valve is fully open.
6. If a butterfly valve is required for flow control, the main thing is to choose the correct size and type of valve. The structural principle of butterfly valves is particularly suitable for making large-diameter valves. Butterfly valves are not only widely used in petroleum, gas, chemical, water treatment and other general industries, but also used in the cooling water system of thermal power station.
7. There are two commonly used butterfly valves: wafer type butterfly valve and flange type butterfly valve. A wafer type butterfly valve is a valve that is connected between two pipeline flanges using double headed bolts. A flange type butterfly valve is a valve with a flange, and the flanges at both ends of the valve are connected to the pipeline flange using bolts.
8. The butterfly plate of the butterfly valve is installed in the diameter direction of the pipeline. In the cylindrical channel of the butterfly valve body, the disc shaped butterfly plate rotates around the axis, with a rotation angle between 0 ° and 90 °. When the rotation reaches 90 °, the valve is fully open.
Post time: Apr-06-2023