The flow adjustment range is large, and the flow-pressure difference changes smoothly;

The internal leakage is small, if there is an external leakage oil port, the external leakage should also be small;

·The adjustment torque is small and the action is sensitive.

The shape and structure of the choke valve is the same as that of the globe valve, but the shape of their opening and closing parts is different. Most of the opening and closing parts of the throttle valve are conical streamline, through which the flow and pressure can be adjusted by changing the cross-sectional area of the passage. The throttle valve is used to reduce the medium pressure in the case of extremely high pressure drop.

The flow velocity of the medium between the throttle disc and the valve seat is so high that the surfaces of these parts are quickly damaged - a phenomenon known as cavitation. In order to minimize the influence of cavitation, the valve disc is made of cavitation-resistant material (made of alloy steel) and made into a streamlined cone with a tip angle of 140-180, which can also enable the valve disc to have a larger opening height, which is generally not recommended. Throttling under small crevices.