Method of maintenance in valve operation

The purpose of maintaining the valve is to ensure that the valve is in a clean, well-lubricated, well-equipped and normal operation.

 

[valve cleaning]

 

 

The valve's surface, the stem and the trapezoidal thread on the stem nut, the stem nut and the bracket slide part and the gear, worm gear and other parts, easy to get a lot of dust. Grease and dielectric residue and other stolen goods, the valve will cause wear and corrosion. Therefore, it is very important to keep the valve external and active site clean and to protect the integrity of the valve paint. The dust on the valve is suitable for brushing and compressed air purge. The trapezoidal thread and the stolen goods between the teeth are suitable for wiping the cloth. The grease and dielectric residue on the valve are suitable for steam blowing, and even brush with copper wire, until the processing surface and matching surface show the metallic luster, and the paint surface shows the color of paint. The steam trap shall be responsible for each class at least once, open the flushing valve and the closing of the drain valve regularly, or remove the washing regularly, so as to prevent the stolen goods from blocking the valve.

 

[valve lubrication]

 

 

The trapezoidal thread, the valve stem nut and stent sliding parts, bearing parts, gears and worm gear and worm gearing position and cooperate with other parts, all need good lubrication condition, reduce the friction between each other, each other to avoid wear and tear. Some parts are specially equipped with oil cup or oil mouth, if damaged or lost in operation, it should be repaired and the oil road should be unblocked.

 

 

Lubricating parts shall be lubricated periodically according to specific conditions. Often open, the valve of high temperature is suitable for the interval one week to one month refueling, not often open, the temperature not high valve refueling cycle can be longer. Lubricants include oil, butter, molybdenum disulphide and graphite. High temperature valves are not suitable for oil and butter, they will be lost due to high temperature melt, and suitable for injection of molybdenum disulfide and erasing graphite powder. The parts of the need for bare lubrication, such as the trapezoidal thread, gear and other parts, if use the oils and fats such as butter, infected with dirt easily, and lubrication mos2 and graphite powder, is infected with dirt is not easy, the lubrication effect is better than butter. Graphite powder is not easy to daub directly, can be used with a little oil or water. The plug valve should be filled with oil in accordance with the specified time, otherwise it is easy to wear and leak.

 

 

[valve maintenance]

 

 

Valve in operation, all kinds of valve should be complete and intact. The bolts on the flange and bracket are indispensable, the thread should be intact, and no looseness is allowed. Tighten the nut on the handwheel and tighten it in time if it is found loose, so as not to wear the joints or lose the handwheel and nameplate. If the handwheel is lost, it is not allowed to use a live wrench instead. The packing gland does not allow the skew or pretension clearance. Valves in the environment that are prone to rain, snow, dust, sand and other contaminants should be installed with a protective cover. The ruler on the valve should be complete, accurate and clear. The seal, cap and pneumatic accessories of the valve should be complete. There shall be no dents or cracks in the insulation clamps.

 

 

It is not allowed to knock, stand or support heavy objects on the running valve, especially non-metal valves and cast iron valves. CDL/CDLF stainless steel multistage centrifugal pump for installation standard motor of self-priming multistage centrifugal pump, the motor shaft through the pump head by using coupling device directly connected to the pump shaft, shaft rod bolt to fix pressure cylinder and flow components between the pump head and in and out of the water, pump in and out of the gate in the bottom of the pump on the same straight line; The pump can be equipped with intelligent protector according to the needs of the pump.

The above:The importance and necessity of development of pressure switch