Advantage
1. Easy and quick opening and closing, labor-saving, low fluid resistance, and can be operated frequently.
2. Simple structure, small external dimensions, short structural length, small volume, light weight, suitable for large-diameter valves.
3. It can transport mud with minimal liquid accumulation at the pipeline outlet.
4. Under low pressure, good sealing can be achieved.
5. Good regulation performance.
6. When fully open, the effective flow area of the valve seat channel is larger and the fluid resistance is smaller.
7. The opening and closing torque is relatively small, and due to the fact that the butterfly plates on both sides of the shaft are subjected to the same medium effect, the direction of torque generated is opposite, making opening and closing more effortless.
8. The sealing surface material is generally made of rubber or plastic, so it has good low-pressure sealing performance.
9. Easy to install.
10. Flexible and labor-saving operation, available in manual, electric, pneumatic, and hydraulic modes.
Disadvantage
1. The pressure and working temperature range are small.
2. Poor sealing performance.
Butterfly valves can be divided into offset plate, vertical plate, inclined plate, and lever type according to their structural forms.
According to the sealing form, there are two types: soft sealing type and hard sealing type. Soft sealing type generally uses rubber ring sealing, while hard sealing type usually uses metal ring sealing.
According to the connection type, it can be divided into flange connection and clamp connection; According to the transmission mode, it can be divided into manual, gear transmission, pneumatic, hydraulic, and electric.
