A: Structure: Butterfly is made up of body, disc, stem and handle components. It is the use of disc opening and closing parts, valve disc fixed to the valve stem is rotated 90 ° to complete the opening and closing action. While opening angle of 20 ° ~ 75 °, the flow and the opening angle of a linear relationship with the characteristics of the throttle valve.

Operating characteristics: butterfly valve is widely used in the following 2.0MPa nominal pressure and temperature not higher than 200 ℃ of various media. During the operation of the valve, butterfly valve stem only rotational movement, disc and stem is not self-locking ability. The stem attached to the gear unit self-locking capability is butterfly stroke can stop at any position.