High-pressure gear pumps have the disadvantage of short operating life, so we use the following measures to improve the operating life of the machine during use:
　　 1. Since the pump body is operated at high temperature, the hinged support should be provided on the piping during cold installation to prevent the displacement of the piping after heating.
　　 2. The coupling must be hot after the pump has warmed up to avoid additional torque during operation.
　　 3. The pressure measuring point of the high-pressure gear pump should be set to stop the alarm. Otherwise, once the discharge pipe is blocked, the pump body may be damaged.
　　 4. When the pump starts, when there is no pressure at the outlet, do not speed up blindly to prevent premature damage of the shaft or bearing.
　　 5. When cleaning the pipetting, do not use the high-pressure gear pump to transport the cleaning solution. The internal parts should be removed and installed after the pipetting is finished, so as to avoid foreign matter in the pump.
　　 6. The temperature of the heat medium jacket of the pump body can be slightly lower than the temperature of the heat medium of the front and rear sleeves. Because the melt viscosity and the shear rate are in a decreasing function, the extrusion of the gear and the shearing of the bearing will cause the melt temperature to rise by 3 to 5 °C after the pump is passed . Lowering the temperature of the heat medium prevents the melt from degrading.
　　 7. Speed ​​up slowly, do not let the front and rear pressure rise sharply, so as not to damage the bearing or block the lubrication passage.
　　 8. The melt filter behind the high-pressure gear pump outlet should be replaced regularly. Do not operate at high pressure or even pressure for a long time.
　　 9. In case of power failure or heat medium circulation interruption exceeds 3Omin , the high-pressure gear pump should be disassembled and reassembled to avoid damage to the pump due to poor lubrication of the melt due to solidification and cracking. Gear pumps are ideal for conveying high viscosity liquids and are used in a wide range of applications.
　　 10. Regular replacement of bearings can save maintenance costs. When the wear of the inner surface of the shaft or bearing is found to be close to the thickness of the hardened layer, the shaft can be ground and used again, and only the bearing can be replaced, which can extend the life of the pump shaft by 8 to 10 years.
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