Goole Valve And Throttle Valve Difference

Difference between globe valve and throttle valve

Goole Valve, also known as cut-off valve or Shut-off valve,, is the most widely used valve. The reason why it is so popular is because the friction between the sealing surfaces during opening and closing is small, more durable, the opening height is not large, it is easy to manufacture, and maintenance Convenient, not only for medium and low pressure, but also for high pressure.

The closing principle of the shut-off valve is to rely on the pressure of the valve stem to make the sealing surface of the disc and the sealing surface of the valve seat closely adhere to each other to prevent the flow of medium. The shut-off valve only allows the medium to flow in one direction, and it is directional during installation. The structural length of the shut-off valve is longer than that of the gate valve, and at the same time, the fluid resistance is large. During long-term operation, the sealing reliability is not strong.

A throttle valve is a valve that controls fluid flow by changing the throttle cross section or throttle length. The throttle valve and the one-way valve can be combined into a one-way throttle valve in parallel. The throttle valve and the one-way throttle valve are simple flow control valves. In the hydraulic system of the quantitative pump, the throttle valve and the relief valve cooperate to form three throttle speed control systems, that is, the throttle throttle System, oil return throttle speed regulation system and bypass throttle speed regulation system.

The throttle valve does not have a negative flow feedback function and cannot compensate for the speed instability caused by the load change. It is generally only used for occasions where the load change is not large or the speed stability is not required.

The appearance structure of the throttle valve is the same as that of the cut-off valve, except that the shape of their opening and closing parts is different. The opening and closing parts of the throttle valve are mostly conical streamlined, which can adjust the flow rate and pressure by changing the cross-sectional area of the channel. The throttle valve is used to reduce the pressure of the medium when the pressure drop is extremely large.