The difference between manual butterfly valves and turbine butterfly valves

First, manual butterfly valve

Manual butterfly valve is a valve with O-ring seal, is a rotary valve. Its valve body and valve seat are cylindrical, and the inner wall is turned to form a sealing surface. The opening and closing of the valve is controlled by the rotation of the butterfly plate, and the rotation Angle of the butterfly plate can be from 0° to 90°, so as to realize the opening and closing of the valve. The advantage of manual butterfly valves is that they are simple to operate and are suitable for applications under low pressure and medium temperature. The disadvantage of manual butterfly valve is that the sealing performance is poor, easy to leak, and not suitable for high temperature and high pressure scenarios.

Second, turbine butterfly valve

The turbine butterfly valve is a valve with a metal seal and is a rotary valve. The valve structure is similar to manual butterfly valves, but the valve seat and inner wall of the turbine butterfly valve are machined from metal and have a turbine design. Turbine butterfly valve adopts hydrodynamic characteristics, can achieve better flow regulation, and has good sealing performance, suitable for high temperature, high pressure and corrosive media scenarios.

Third, comparison between manual butterfly valve and turbine butterfly valve

1. Structural difference: The structure of manual butterfly valve and turbine butterfly valve is similar, but the valve seat and the inner wall of the turbine butterfly valve are made of metal, and have a turbine design.

2. Control mode: Manual butterfly valve needs to manually rotate the butterfly plate to control the opening and closing state, while turbine butterfly valve adopts hydrodynamic characteristics, which can achieve better flow regulation.

3. Application scenario: The manual butterfly valve is suitable for low pressure and medium temperature applications, while the turbine butterfly valve is suitable for high temperature, high pressure and corrosive media applications.

4. Advantages and disadvantages: manual butterfly valve is simple to operate, but the sealing performance is poor; Turbine butterfly valve has better flow regulation and sealing performance, but the cost is higher.