After refueling the grease gun, the operator selects the valve and grease connection method before proceeding with the grease injection operation. There are two situations: on the one hand, the amount of grease injected is insufficient, and the sealing surface wears faster due to the lack of lubricant. On the other hand, excessive fat injection leads to waste. There is no calculation of the sealing capacity of different valves based on the type of valve. The sealing capacity can be calculated based on the valve size and type, and then an appropriate amount of lubricating grease can be injected reasonably.

During the liposuction operation, the liposuction pressure exhibits regular peaks and valleys. Low pressure, seal leakage or failure,Excessive pressure, blockage of the grease injection port, hardening of the grease inside the seal, or locking of the sealing ring with the valve ball or valve plate. When the grease injection pressure is usually too low, the injected lubricating grease tends to flow into the bottom of the valve chamber, usually occurring in small gate valves. If the injection pressure is too high, on the one hand, check the injection nozzle, and if the grease hole is blocked, determine the situation and replace it; On the other hand, lipid hardening requires the use of cleaning solution to repeatedly soften failed sealing grease and inject new lubricating grease for replacement. In addition, the sealing model and sealing material also affect the grease injection pressure. Different sealing forms have different grease injection pressures, and in general, the grease injection pressure for hard seals is higher than that for soft seals

Ball valves are usually maintained in the open position, and in special circumstances, they may be closed for maintenance. Other valves cannot be treated solely based on their open position. The gate valve must be in the closed state during maintenance to ensure that the lubricating grease fills the sealing groove along the sealing ring. If it is in the open position, the sealing grease will directly fall into the flow channel or valve chamber, causing waste

The pressure, grease injection amount, and switch position are all normal during the grease injection operation. But to ensure the lubrication effect of the valve, sometimes it is necessary to open or close the valve, check the lubrication effect, and confirm that the surface of the valve ball or gate is lubricated evenly

After the valve pressure test, the gas and moisture inside the sealed chamber of the valve are pressurized due to the increase in ambient temperature. When injecting grease, it is necessary to first discharge and release the pressure to facilitate the smooth progress of the grease injection work. After grease injection, the air and moisture inside the sealed chamber are fully displaced. Timely release of valve chamber pressure also ensures the safety of valve use. After the grease injection is completed, be sure to tighten the drain and pressure relief plugs to prevent accidents from occurring

During normal fat injection, the fat outlet near the injection port will release the fat first, then reach the low point, followed by the high point, and gradually release the fat. If it does not follow the rules or does not produce fat, it indicates blockage and should be promptly cleared

When injecting grease, it is also necessary to observe the alignment between the valve diameter and the sealing ring seat. For example, for a ball valve, if there is an open position interference, the open position limiter can be adjusted inward to confirm that the diameter is straight before locking. Adjusting the limit should not only focus on opening or closing one position, but also consider the overall situation. If the opening is level and not closed properly, it will cause the valve to not close tightly. Similarly, when adjusting the closing position, corresponding adjustments to the opening position should also be considered. Ensure the right angle travel of the valve

After liposuction, make sure to seal the liposuction port. To avoid impurities entering or lipid oxidation at the grease injection port, anti rust grease should be applied to the cover to prevent rusting. So that it can be applied in the next operation

When injecting grease, it is also necessary to consider specific issues in the future sequential transportation of oil products. Given the different qualities of diesel and gasoline, the flushing and decomposition ability of gasoline should be considered. In future valve operations, when encountering gasoline section operations, timely supplement lubricating grease to prevent wear and tear from occurring

When adding grease, do not ignore the grease injection at the valve stem. The valve shaft has sliding shaft sleeves or packing, which also need to be kept lubricated to reduce frictional resistance during operation. If lubrication cannot be ensured, the torque will increase during electric operation and wear parts