Advantages and disadvantages
1 advantages
1. Open and close easily and quickly, effort, fluid resistance is small, can operate frequently.
2. simple structure, small size and light weight.
3. can carry mud, with the least accumulation of fluid in the pipeline opening.
4. low pressure, it can achieve a good sealing.
5. good regulating performance.
2 defects
1、 a small range of using pressure and working temperature.
2、 poor sealing performance.
Butterfly valve according to the structural style can be classified as bias plate, vertical plate, inclined plate and lever type. According to the sealing forms can be classified as soft-sealed type and hard-sealed two kinds. Soft sealed type commonly uses rubber ring sealing, hard sealed type commonly uses metal ring sealing.
According to connection type it can be classified as flange connection and wafer connection; according to transmission mode can be divided into manual, gear transmission, pneumatic, hydraulic and electric.
