1 soft-sealing gate valve leakage of filler

( 1) Packing gland is too loose, can evenly use compression packing gland nut and tighten.

( 2) Packing ring number is not enough, should increase the packing.

( 3) Packing due to improper use too long or save failure, a new packing should be replaced, replace when must pay attention to the joint between the circle should cross stagger, 1200.

2 soft-sealing gate valve disc and seat sealing surface between

( 1) Between the sealing surface with dirt, can wash to eliminate it.

( 2) Sealing surface damage, if any, should be reground, when necessary to welding and machining, grinding of the sealing surface must level off, the roughness is not less than 0. 4.

3 soft-sealing gate valve body and bonnet joint leakage nut screw is not tight or slack uneven, to readjust.

( 1) Flange sealing surface damage ( Straight grooves or groove marks, etc. ) Should be revised.

( 2) The gasket is damaged, a new gasket should be replaced.

4 soft-sealing gate valve stem drive not flexible

( 1) Too tightly on the packing, should be appropriate unscrew packing gland nut.

( 2) Gland malposition, stem and should be evenly budge on the packing gland nut, gland returned to its normal position.

( 3) The thread on the stem and stem nut has damage, shall be apart after elimination.

soft-sealing gate valve widely used. Soft-sealing gate valve, valve used in industry, soft-sealing gate valve opening and closing of a ram, ram movement direction perpendicular to the direction of flow and the valve can only be fully open and close, not to adjust and throttling. Sealing face has two gate, two of the most commonly used mode gate valve sealing surface form a wedge, the wedge Angle vary with the Industrial Valves parameters, usually in the form of 50, when the medium temperature is not high for 2 ° 52 ' ' ' '.

keywords: soft-sealing gate Industrial Valves soft-sealing gate valve fault elimination method
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