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China Shanghai Qiuyi Valve Co.,Ltd
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Throttle (throttle valve) of the structure and shape there is no difference between closing valves, but they hoist pieces of the shape is different. Most of the throttle valve to hoist pieces of conical streamlined, through its cross-sectional area and change the channel to regulate flow and pressure. Throttle for the drop in pressure situations下作greatly reduce the pressure on the medium used.
Media in the throttle valve and the valve seat between the great flow to the surface soon caused damage to these parts - the so-called cavitation phenomenon. In order to do is to reduce cavitation effects of steam valve corrosion-resistant materials used (steel manufacturing) and into the top corner for the 140 to 180 of the streamlined cone, the valve can also make a greater opening height, generally do not In a small crevice under the recommendation of cutting expenditure.
Throttle has the following characteristics:
1, a simpler structure, for the manufacture and maintenance of low cost.
2, regulation accuracy is not high, can not make use of regulation.
3, easy sealing surface erosion, can not be cut off medium used.
4, sealing less good.
Throttle by way channel can be divided into straight-through processing and the angle of the two; according to the shape of the hoist, the needle, ditch-and three-window. Throttle the installation and maintenance should note the following:
The need for regular valve operation, should be installed in the area will be easier to operate the place.
Media attention should be paid at the time of installation direction and the direction of the arrow Valve by the standard line. |
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