Dec. 23, 2019
Sixth, pay attention to the problem of uniform fat production when injecting fat. In normal fat injection, the fat exit hole closest to the fat injection port will first emit fat, then go to the low point, and finally the high point, and then fat out one by one. If it is not in accordance with the rules or does not produce fat, it proves that there is a blockage, and it is cleared in time.
Seventh, it is also necessary to observe that the valve diameter is flush with the seat of the sealing ring when injecting grease. For example, for O type ball valves, if there is interference in the open position, you can adjust the open position limiter inward to confirm that the diameter is straight and lock it. Adjusting the limit cannot be pursued only by opening or closing one position, it must be considered as a whole. If the open position is flush and the close is not achieved, the valve will not close tightly. In the same way, when the adjustment is in place, we must also consider the corresponding adjustment of the opening. Ensure right-angle travel of the valve.
Eighth, the fat injection port must be closed after the fat injection. Avoid the entry of impurities, or oxidation of lipids at the grease injection port, and apply anti-rust grease to the cover to avoid rust. For the next operation.
O Type Ball Valve
Ninth, when injecting fat, we must also consider specific issues in the future delivery of oil products. In view of the different qualities of diesel and gasoline, the scouring and decomposition capabilities of gasoline should be considered. When the valve is operated in the future, when it encounters the operation in the gasoline section, it should be replenished in time to prevent wear and tear.
Tenth, don't neglect the grease injection at the valve stem part during the grease injection. The valve shaft has sliding sleeves or packings, and it is also necessary to maintain lubrication to reduce frictional resistance during operation. If lubrication cannot be ensured, the torque will increase when the electric parts are worn and the switches will be laborious during manual operation.
Eleventh, some globe valves are marked with arrows on the valve body. If there is no FIOW in English, it is the direction of the seal seat. It is not used as a reference for the flow direction of the valve. Normally, double seated ball valves have a bidirectional flow direction.
Twelfth, when maintaining the valve, pay attention to the problem of water in the electric head and its transmission mechanism. Especially infiltration of rainwater during the rainy season. One is to rust the transmission mechanism or transmission sleeve, and the other is to freeze in winter. As a result, the torque of the electric regulating valve is too large, and the damage to the transmission components will cause the motor to no-load or the over-torque protection will trip and fail to achieve electric operation. Transmission parts are damaged and manual operation is not possible. After the over-torque protection action, the manual operation cannot be opened or closed. If it is forcibly operated, the internal alloy parts will be damaged.
In summary, the valve maintenance is really treated with a scientific attitude, so that the valve maintenance work can achieve the desired results and application purposes.
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