The correct usage method of globe valve

For globe valves, not only installation and maintenance skills are required, but also operation skills are necessary.

When opening and closing the shut-off valve, the force should be steady and not impactful. Some components of high-pressure shut-off valves with impact opening and closing have already considered that this impact force cannot be equivalent to that of general shut-off valves.

After the shut-off valve is fully opened, the handwheel should be turned back slightly to tighten the threads tightly to prevent loosening and damage.

When the pipeline is first used, if there is a lot of dirt inside, the shut-off valve can be slightly opened to use the high-speed flow of the medium to flush it away, then gently closed (cannot be quickly or abruptly closed to prevent residual impurities from damaging the sealing surface), and opened again. Repeat this process multiple times to flush out the dirt before returning to normal operation.

A normally open shut-off valve may have dirt on its sealing surface. When closing, it should be flushed clean using the above method before being officially closed.The main stop valve product names of China Stop Valve Network include:GB Bellows Globe Valve,High Temperature and Pressure Power Station Electric Globe Valve,Insulation Globe Valve,Inner Thread Straight-through Stainless Steel Globe Valve,Internal Thread Ammonia Globe Valve,Liquefied Gas Globe Valve

If the handwheel or handle is damaged or lost, it should be immediately equipped and cannot be replaced by a flexible wrench to avoid damaging the valve stem square, causing ineffective opening and closing, and leading to accidents in production.

Some media may cool down after the shut-off valve is closed, causing the valve to contract. The operator should close it again at an appropriate time to ensure that there are no fine gaps on the sealing surface. Otherwise, the medium will flow through the gaps at high speed, which can easily erode the sealing surface.

When operating, if it is found that the operation is too difficult, the reason should be analyzed. If the packing is too tight, it can be relaxed appropriately. If the valve stem is skewed, personnel should be notified for repair. Some shut-off valves have difficulty opening due to thermal expansion of the closing components when in the closed state; If it is necessary to open at this time, loosen the valve cover thread by half a turn to one turn, eliminate the stress on the valve stem, and then turn the handwheel.

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