The performance requirements and characteristics of throttle valve

The throttle valve is by changing the throttle section or throttlinglength to control fluid flow valve. The throttle valve and check valve in parallel can be combined into one-way throttle valve. The throttle valve and the throttle valve is a one-way flow control valve is simple,the quantitative pump hydraulic system, the throttle valve and theoverflow valve, may be composed of three kinds of throttling speed control system, namely the throttle control system, return oil throttle governing system and the bypass throttle speed control system.Throttle valve does not flow negative feedback function, notcompensation caused by the change of load speed is not stable,generally used only for load changes have little or no high speed stability requirements of the occasion.

Performance

The valve performance requirements:

· Flow rate adjustment range, flow pressure changes smoothly;

And in a small amount of leakage, if there is leakage, leakage tosmall;

· Adjusting torque is small, flexible action.

Universal joint

Throttle valve (Choke valve) shape valve structure and no difference, but they open and close parts of the shape is different.The throttle valve opening and closing parts mostly conical streamlined, through its cross-sectional area and change the channel to regulate the flow and pressure. Throttle valve for thepressure drop under conditions of great pressure to reduce media use.

Medium large flow between the throttle valve and valve seat, so thatthese parts of the surface soon - the so-called cavitation damage.In order to minimize the influence of the cavitation, valve cavitation erosion material (alloy steel manufacturing) and made the top angle of 140 ~ 180 streamlined cone, which also enables the valve to open a larger height, is generally not recommended in the small gap under the throttle.

Characteristics of throttle valve

1.The structure is simple, easy to manufacture and repair, low cost.

2.Regulation accuracy is not high, can not be adjusted to use.

3.Easy sealing surface erosion, cut off the media can not be used.

4.The poor sealing.

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