Common Faults and exclusion method external gear pump

Air is sucked into the common faults of external gear pump, following the first volume of the air sucked into this fault exclusion method : Pump with stainless steel end caps on both sides of the external gear pump in direct contact with a hard seal, if the flatness of the contact surfaces do not meet requirements, the work of the manual fuel transfer pump when air is sucked into the easily; Similarly, the pump and the pressure cap also for direct contact between the cover, the air is easily invade into; If the gland is plastic products, due to its damage or deformation due to temperature changes, but also make Mifengbuyan enter the air. Exclude this failure is: when the flatness dispenser fuel pump of the external gear pump or pump cover less than the specified time, you can press shaped route from grinding on the plate with emery also be on the surface grinder grinding to flatness of not more than petrol dispenser pump, and the need to ensure that the vertical plane of the hole which requires; leakage and the gland to the external gear pump at the head, can be coated with an adhesive such as epoxy resin for sealing.External gear pump shaft seal skeleton generally used for sealing. If the garter spring off the lip, or the anti-oil package, or lips were strained, aging, will make the seal often in a negative state backend sucked into the air, and can be replaced with new seals to be addressed.