Several methods to quickly solve the valve sealing performance is poor

Now the valve generally poor sealing performance defects, many buyers, even the seller do not know how to solve, I Botou Haiying Valve Factory After careful study, a comprehensive discussion has been found to solve the valve sealing performance of the poor 5 Methods, all sectors of the industry are welcome to reference and learn from. Solution of poor sealing performance (5 methods) 1) grinding fine grinding to eliminate traces, reduce or eliminate the sealing gap, improve the sealing surface finish, to improve the sealing performance. 2) the use of unbalanced force to increase the seal than the pressure Actuator of the sealing pressure generated by the spool must unbalance force on the valve top-off trend, the spool sealing force for the two forces subtraction, on the contrary, the spool Resulting in pressure-closing trend, the spool of the sealing force is the sum of the two forces, thus greatly increasing the seal than the pressure, the sealing effect can be increased more than 5 to 10 times more than the previous general dg ≥ 20 single-sealing valve for the previous The situation is usually open type, if the sealing effect is not satisfied, to flow closed, the sealing performance will be doubled.Especially the two-type cut off the control valve, the general should be closed by flow. 3) to improve the actuator sealing force to improve the actuator of the sealing force of the valve core, but also to ensure that the valve is closed, increasing the pressure ratio to improve the sealing performance of the common method. Commonly used methods are: ① moving the scope of work of the spring; ② switch to a small stiffness spring; ③ increase the attachment, such as with locator; ④ increase the pressure of gas source; ⑤ switch actuator with greater thrust. 4) The use of single seal, soft seal method of double seal control valve can be used instead of a single seal, usually can improve the sealing effect of more than 10 times, if the unbalanced force larger should increase the corresponding measures on the hard seal valve Can use soft seal, but also improve the sealing effect of 10 times. 5) switch to a good sealing performance of the valve in the last resort, the switch can be considered with better sealing performance of the valve, such as the ordinary butterfly valve to the use of oval, and then use the cut-off butterfly valve, eccentric rotary valve, Ball valve and the specially designed cut-off valve.

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