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Inhalation of air is a common failure of KCG-6 / 0.6 high temperature gear pump, the following describes the method to exclude the inhalation of air failure:
①.CB-B type KCG-6 / 0.6 high temperature gear pump body and both sides of the cover for direct contact with the hard seal, if the contact surface flatness does not meet the requirements, the pump easy to inhale the air at work; Similarly, direct contact between the end cap and the gland of the pump also makes the air easy to invade. If the gland is a plastic product, the gland will enter the air due to its damage or deformation due to temperature changes. The way to get rid of this kind of trouble is: when the flatness of the pump body or pump cover can not meet the stipulated requirements, it can be grinded back and forth on the flat plate with the gravure sand in the shape of the glyph, or grinded on the surface grinding machine Flatness does not exceed 5μm, and the need to ensure the verticality of the plane and the hole requirements; for the pump cover and gland at the leak, can be coated with epoxy adhesive sealing.
â‘¡. KCG-6 / 0.6 high temperature gear pump on the shaft generally used to seal the oil seal. If the locking lip spring off, or the oil seal installed, or its lips were injured, aging, will make the back end of the seal often in negative pressure and inhale the air, the general can replace the new seal to be resolved.
â‘¢. High temperature gear pump installation location is too high from the oil level, especially in the pump speed is reduced, because the pump can not guarantee the necessary vacuum caused by insufficient suction and inhale the air. At this point should be adjusted to the relative height of the pump and oil surface to meet the requirements.
â‘£. The fuel tank is not enough fuel, or suction pipe nozzle is not inserted below the oil surface, the pump will inhale the air, this time should be added to the fuel tank to the oil line; if the return pipe mouth exposed oil, and sometimes Due to the instantaneous negative pressure in the system and the air back into the system, so the return pipe nozzle should generally be inserted below the oil level.
⑤. Suction filter clogged with dirt or its capacity is too small, resulting in increased suction resistance and inhalation of air; In addition, into the port of a larger caliber may also be brought into the air. At this point, you can clean the filter, or choose a larger capacity, and out of the appropriate diameter filter. In this way, KCG-6 / 0.6 high temperature gear pump not only can prevent the inhalation of air, but also to prevent noise.
KCG-6 / 0.6 high temperature gear pump installation location is too high from the oil surface, especially in the pump speed is reduced, because the pump can not ensure that the necessary vacuum caused by vacuum suction caused by insufficient suction air. At this point should be adjusted to the relative height of the pump and oil surface to meet the requirements.