How to operate and maintain the valve during operation

This article focuses on the German ... The product characteristics of the valve, to analyze how to operate and maintain the valve in operation.

The principles of maintenance during the operation of the valve are as follows.
① Keep the external and moving parts of the valve clean, to protect the integrity of the valve paint. The surface of the valve, stem and stem nut on the trapezoidal thread, stem nut and bracket sliding parts and gears, worm gears and other parts are prone to depositing a lot of dust, oil and media residue and other dirt, wear and corrosion of the valve. Therefore, the valve should always be kept clean. The general dust on the valve should be swept by brush and compressed air, or even brushed by copper wire until the processing surface and the matching surface show the metal luster and the paint surface shows the original color of the paint. Steam trap should be in charge of a person to check at least once per shift; regularly open the flushing valve and steam trap bottom wire plug flushing, or regularly disassemble down flushing, so as not to block the valve with dirt.

② Keep the lubrication of the valve, valve Trapezoidal threads, stem nuts and bracket sliding parts, bearing bits, gears and worm wheel Langstroth meshing parts and other mating active parts need good lubrication conditions to reduce mutual friction and avoid mutual wear. For no oil cup or oil nozzle, easy to damage or lost in the operation of the parts, should be repaired with the lubrication system, to return to prove the unclogging of the oil circuit.

Lubrication parts should be regularly oiled according to the specific circumstances. Often open, high temperature valves suitable for a week to a month between refueling; not often open, the temperature of the valve refueling cycle can be longer. Lubricants are oil, grease, molybdenum disulfide and graphite, etc.. Oil is not suitable for high-temperature valves; butter is also not very suitable, they will be lost due to high temperature melting. High temperature valves are suitable for adding molybdenum disulfide and wiping graphite powder. The exposed lubrication parts, such as trapezoidal threads, between the teeth and other parts if the use of butter and other grease, very easy to stain the dust, while the use of molybdenum disulfide and graphite powder lubrication is not easy to stain the dust and lubrication effect is better than butter, graphite powder is not easy to apply directly, available a little oil or water into a paste can be used.

Oil injection seal plug valve should be oiled according to the prescribed time, otherwise it is easy to wear and leakage.

③ Keep the two pieces complete and intact. The bolts of the flange and bracket should be complete and full buckle, no loose phenomenon is allowed. The fastening nut on the handwheel should be tightened in time if it is loose, so as not to wear out the connection or lose the handwheel. After the handwheel is lost, it is not allowed to replace the handwheel with a live plate, and it should be matched in time. Packing differential pressure is not allowed to be skewed or no pre-tightening gap. Easily polluted by rain, snow, dust and other dirt environment, the valve stem should be installed to protect the cover. The scale on the valve should be kept intact and accurate. Valve seals, caps, pneumatic accessories, etc. should be complete and intact. Insulation jacket should be free of dents and cracks.


In addition, the valve does not allow knocking, supporting heavy objects or standing people, so as not to dirty the valve, damage the valve. In particular, non-metallic mesh doors and cast iron valves, it is more taboo.

Keep the routine maintenance of electric devices. Maintenance of electric devices, in general, not less than once a month. Maintenance content are: the appearance should be clean, no dust stained accumulation, the device is not stained by vapor, oil; sealing surface, point should be firm, tight. No leakage; lubrication parts should be greased as required, valve Xuan nut should be greased; electrical parts should be intact, no phase failure, automatic switch and thermal relay should not be off, the indicator light shows correct.