Self-reliance of the regulating Industrial Valves sealing affects the self-reliance type regulator is the use of performance, so in use to improve its impermeability, self-reliance of the regulating valve sealing performance improvements can be through the following five ways:

1) Grinding method: fine grinding, eliminate traces, reduce or eliminate the seal clearance, improve the sealing surface degree of finish, in order to improve the sealing performance.

2) Using the method of unbalanced force increase sealing pressure ratio: the sealing pressure caused by the actuator to the valve core must, unbalanced force trend up to the valve core, valve core of the sealing for the two forces is presupposed, on the other hand, the pressure to the valve core shut trend, valve core sealing for the two forces combined, thus greatly increase the sealing pressure, sealing effect can be more than 5 ~ 10 times higher than that of the former. General dg≥ 20 single seal type of valve for the former, usually in the form of flow type, if that the sealing effect is not satisfied, to flow type closed, sealing performance will be multiplied. Especially the two type of cut off valve, general shall be according to the flow closed type to use.

3) Increase the sealing force method: actuator actuator on the valve core of the sealing force, also ensure the valve closed, increase the sealing pressure, improve the sealing performance of common method. The commonly used methods are: (1) mobile spring work scope; (2) to switch to smaller stiffness spring; (3) add accessories, such as take locator; (4) increase the air pressure; (5) to switch to have greater thrust actuator.

4) By using single seal, soft seal: regulator, over the use of double seal can be converted to a single seal, often can improve the sealing effect of more than 10 times, if the unbalanced force is bigger, should increase the corresponding measures, to hard seal valve can convert soft seal, and more than 10 times the sealing effect can be improved.

5) Switch valve sealing performance better: in case of necessity, can consider to use has better sealing performance of valve. Such as the common butterfly valve to switch to the elliptical butterfly Industrial Valves, and then can also switch to cut off type butterfly valve, eccentric rotary Industrial Valves, ball valve, and specially designed for shut-off valve.

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