The valve maintenance and matters needing attention are common problems

Before welding in before production and operation after the valve professional maintenance work for valve service in production, operation plays an important role in the correct order, and effective maintenance will protect the valve, the valve function normally and to extend valve life. The valve maintenance work looks be like simple, actually otherwise. Work has a tendency to be ignored.

1, the valve note fat, often neglected note of fat. Greasing the gun after lubrication, the operator choose valves and greasing connection and greasing homework. There are two kind of situations: on the one hand greasing quantity is little note fat is insufficient, seal face because of lack of lubricant and speed up the wear. On the other hand, create waste greasing too much. Is not according to the valve type category, to a different China Valve sealing capacity for accurate calculation. With the valve size and category can calculate capacity, then the reasonable sealed into a moderate amount of grease.

2, the valve greasing, often ignore the problem of stress. In the note fat when operating, greasing pressure regularly peak and valley is change. Pressure is too low, seal leakage or failure, pressure is too high, greasing mouth jam, sealed inside lipid sclerosis or sealing ring and ball valve, the valve plate, holding in death. Usually pressure greasing too low, the more grease injection into the body cavity the bottom, commonly occur in small gate valves. And greasing pressure is too high, on the one hand, mouth, so check note fat fat obstruction by marshaling hole to change; On the other hand is the lipid sclerosis, want to use, cleaning and failure of fat, softening seal and inject new grease replacement. In addition, seal model and sealing material, also influence greasing pressure, different sealing have different greasing pressure, the general situation hard seal greasing pressure than soft seal.

3, the valve note fat, notice the Hydrant Valve in the problem of a switch. Ball valve maintenance generally in open when a state, special circumstances choose close maintenance. Other valves also shall not with open a punish. Gate valves must be in when maintaining is in the closed position, to ensure the sealing ring full of sealing grease auger, if open a fat, seal is directly off word or the body cavity, inflow to create waste.

4, the valve greasing, often ignore note fat effect problem. Note fat in the operation of pressure, note fat, switch a is normal. But to ensure that the valve note fat effect, sometimes need to open or close the valve, check for lubrication effect, confirm valve ball or disc surface lubrication even.

5, greasing, keep body bleed and silk plugging relief problem. The China Valve pressure test, seal chamber the body cavity gas and water for the environment temperature and the boost, note when fat want to undertake relief, favors emission greasing the smooth progress of the work. Note fat in the cavity after sealing air and moisture is fully replacement out. Timely relief valve cavity pressure off, protects the valve safety. Note fat ended, must tighten sewage and relief silk plugging, in case accident happening.

6, greasing, keep out of uniform. Fat Normal note fat, greasing the mouth recently from a fat KongXian out, and then to low fat, finally is high, the successive fat. If not by the law or not, the fat that there is blocked, QingTong processing in.

7, greasing also want to observe valve size and sealing ring leveled a problem. For example, if there is a ball valves open over surplus, can adjust to open a limit device, confirm size after flat lock. Adjust the limit only for not open or GuanYiFang position, want whole to consider. If open a flush shut does not reach the designated position, can cause the valve shut is lax. Similarly, adjust shut in place, also want to consider open a corresponding adjustment. Ensure the quarter-turn valves.

8, greasing, must sealed greasing mouth. Avoid impurities in, or note fat mouth lipid oxidation and block in to daub, avoid rust fat rust. So that the next time when operating the application.

9, note fat, also want to consider in order in the future oil in conveying concrete problems specific to treat. In view of the diesel and gasoline different quality, should consider the scour of the gasoline and decompose the ability. After operation, meet in valve for gasoline homework in time, prevent grease, added wear happen.

10, note fat, don't ignore the valve stem parts of the note fat. Valve shaft parts have the sliding collar or packing, also need to keep lubricant state, in order to decrease the operation of the friction resistance, if cannot ensure lubricating, the electric when operating torque increase the worn parts, manual operation switch effort.

11, some ball valve body with arrows, if not on FIOW handwriting, accompanied by an English is a direction, not seal the flow direction of medium as a reference, the relief valve in opposite directions. Usually, two-seater sealing ball valves with two-way flow direction.
12 when maintaining, valve, also want to pay attention to electric transmission mechanism of head and water problems. Especially in the rain infiltration rainy season. One is to drive institutions or transmission shaft set of rust, 2 it is the winter freeze. Cause electric valves operation torque transmission components will be too big, damage to or the no-load motor torque protection jumped unable to realize electric operation. Transmission components, manual operation cannot. In the super torque protection movement, also can't switch manual operation, such as forced operation and will damage internal alloy parts.

To sum up, the Hydrant Valve maintenance really with scientific attitude, ability makes the valve maintenance attain effect and the purpose of the application.