Melt gear pump is an essential equipment for polyester melt conveying and metering. Compared with other types of melt pump, gear pump has the advantages of compact structure, reliable operation, low energy consumption, high volumetric efficiency, less shear effect on melt, the most stable flow at high viscosity and high pressure, and no outlet pressure fluctuation. The unique advantages of the pump and its key role in the process flow make it play an irreplaceable role in the production of polyvinegar. The following details introduce how to extend the service life of polyester melt gear pump effectively.
1. Because the pump body of the polyester melt gear pump runs at high temperature, the hinge support should be installed on the piping during cold installation to prevent the piping displacement after heating up.
2. The U-shaped coupling must be hot-aligned after the pump body is heated to avoid additional torque due to thermal deformation during operation.
3. Pump outlet pressure measuring point of melt gear pump should be interlocked to stop and replace, otherwise, once the discharge pipe is blocked, it is easy to cause damage to the pump body.
4. When the melt pump starts, it is not necessary to increase the speed blindly when there is no pressure at the outlet to prevent premature damage to the shaft or bearing.