Handwheel shutoff valve operation

For the hand wheel shut-off valve, not only to install and maintain, but also will operate.

Open and close the hand wheel shut-off valve, the force should be smooth, non-impact. Some of the impact of opening and closing the high-pressure shut-off valve hand wheel components have been considered and the general impact of such hand wheel shut-off valve can not be equated.

When the hand wheel shut-off valve fully open, the hand wheel reverse a little, so that between the threads tight, so as not to loose damage. en.99599.com

The early use of the pipeline, the internal dirt more handwheel shutoff valve can be parted, the use of high-speed flow of medium, which washed away, and then gently close (not closing fast, fierce close, to prevent residual impurities pinch seal surface), open again, so repeated several times, rinse the dirt, and then put to work.

Normally open hand wheel shut-off valve, sealing surface may stick dirt, closed by the above method should be washed away, and then officially shutting.

Such as hand wheels, handles damaged or lost, immediately filled and unavailable loose wrench in place, so as not to damage the stem of the Quartet, hoist ineffective, the accident that occurred in production.

Some of the media, in the hand wheel shut-off valve closed After cooling, the valve member contraction, the operator should be closed once again at an appropriate time, so that the sealing surface without leaving a slit. Otherwise, the media from the slit-speed flows easily punch sealing surface erosion.

In operation, the operation is too strenuous if found, should analyze the reasons. If the packing is too tight, it may be appropriate to relax, such as stem skew, repair personnel should be notified. Some hand wheel shut-off valve in the closed state, the closure member to thermal expansion, resulting in open difficulties; If it is necessary to open at this time, you can loosen the bonnet thread half circle to circle, eliminate stress stem, then board the handwheel .
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