Pre-production in the welding of the Swing Check Valve before and after the commissioning of the professional conservation work for the valve to serve production operations play a crucial role in the proper and orderly and effective conservation and maintenance will protect the valve, the valve to function properly and extend valve life. Dashpot Check Valve, Slow Close Check Valve conservation appears to be simple, does not. Work, often neglected aspect.
First, the valve greasing, it is often overlooked issue of injection fat content. Note grease gun refueling, the operator selection of valves and injection mode coupling grease was conducted after the greasing operation. There are two kinds of situation: on the one hand greasing greasing less inadequate sealing surface and accelerated wear and tear due to lack of lubricant. Note the other hand, excessive fat, resulting in waste. Is no basis for the valve type of categories for different valve sealing capacity of precise calculations. Can be calculated Forged Steel Check Valve size and type of sealing capacity, and then inject the right amount of grease and reasonable.
Second, the valve greasing, often ignore the stress. In the greasing operation, the injection pressure grease trough was changed regularly. The pressure is too low, seal leakage or failure, the pressure is too high, fat injection port plug, seal hardening or within the lipid with the valve seal Pressure Sealing Swing Check Valve plate Hugging. Typically, grease injection pressure is too low, the injection of grease into the valve chamber at the bottom of many, generally occurs in a small valve. The fat injection pressure is too high, on the one hand fat injection nozzle check and if so, grease hole blocking satisfied that the circumstances be replaced; the other hand, lipid hardening, to use the cleaning fluid, repeated failure to soften the seal fat, and inject new grease replacement . In addition, the seal type and sealing materials, also affect the grease injection pressure, the different forms have different sealing grease injection pressure, generally hard-sealing injection pressure is higher than the soft sealing grease.
Third, the valve greasing, the attention to the switch places the valve problem. Valve conservation in general are in the open position when the state of special circumstances, choose to close maintenance. Also should not be any other valve to open a bit punished. Valve in the conservation time must be turned off to ensure that grease seal along the seal is full of trenches. In the open position, sealing grease directly fall into the flow channel or valve cavity, resulting in waste.
Fourth, the valve greasing, often ignore the effect of injection fat problem. Greasing operation, the pressure, injection fat content, the switch position are normal. However, in order to ensure that the valve greasing effect, and sometimes need to open or close the valve, for lubrication checks to confirm the surface of the valve gate valve ball or even lubrication.
Fifth, note grease must pay attention to sewage and wire blocking the pressure relief valve problem. Valve pressure test, sealed valve chamber cavity gas and water due to environmental temperature and the step-up, when to conduct the sewage grease injection pressure relief in order to facilitate the smooth progress of the work of greasing. After injection grease seal cavity of air and moisture to be fully replaced them. Time to vent off valve cavity pressure, but also protects the use of safety valves. After greasing, be sure to tighten the wire blocking drainage and pressure relief to prevent accidents from happening.
Sixth, note grease must pay attention to even out the fat problem. Note the normal fat, the fat from the injection port nearest hole, first-out fat out of fat, then to low, and finally a high point, successive out the fat. If you do not follow the law, or no fat, prove the existence of congestion in a timely manner Kiyomichi treatment.
Seventh, note that even the observation of grease and seals the valve seat diameter flush the problem. For example, ball valve, if there is to open up the interference can be adjusted to the inside to open up stopper, confirmed after the lock straight path. Adjust the limit is not only the pursuit of open or closed one location, to be whole. If you open up flush, Guan is not in place, will cause the valve off lax. Similarly, adjust the customs are in place, we should also consider to open up accordingly. To ensure that the right-angle valve stroke.
Eighth, greasing, be sure a good seal grease injection port. To avoid impurities to enter the mouth or injection fat lipid oxidation, rust-proof seal to smear grease to prevent rust. In order to apply the next operation.
9th, note grease, they should also consider the future delivery of oil in order to treat specific issues. In view of the different quality of diesel and petrol should be considered the ability of gasoline erosion and decomposition. Valve operation at a later encountered when operating gasoline segment replenish grease to prevent wear and tear from happening.
Tenth, greasing, do not ignore the stem parts of the greasing. Parts of a sliding sleeve valve shaft or packing, but also the need to maintain lubrication to reduce friction during operation, if they can not ensure that the lubricant, then the electric operation, increased torque, wear and tear parts, manual operation switches effortlessly.
11th, some marked with arrows on the valve body, if not accompanied by English FIOW writing, for the sealing seat role in the direction of the flow of information not as media, since the vent valve in the opposite direction. Under normal circumstances, two-seater with a two-way flow valve seal.
12th, Butterfly Swing Check Valve maintenance, also pay attention to the first and the transmission of electric water problems. In particular, infiltration of rain during the rainy season. First, institutions or shaft sleeve make transmission rust, and second, to freeze in winter. Caused by electrical valve operation torque is too large, damage to transmission components will protect the motor no-load or super-jump torque electric operation can not be achieved. Transmission component damage, manual operation is also impossible. In the ultra-torque protection action, the manual operation is also unable to switch, such as the forced operation, the damaged parts within the alloy.
To sum up, Double Plate wafer type Check Valve maintenance is a science, its results can not see or touched. Truly scientific attitude in order to make the valve maintenance work to achieve the desired effect and application purposes.
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