Safe use of polyester melt gear pump
1. The temperature of the heat medium jacket of the pump body can be slightly lower than the heat medium temperature of the front and rear clamping sleeves. Because the viscosity of the melt decreases with the shear rate, the extrusion of the gear and the shear of the bearing will raise the melt temperature by 3-5 degrees Celsius after the pump. Reducing the temperature of the heat medium can prevent the melt from degrading. The data show that the bearing capacity can be greatly increased by reducing the temperature of the bearing area, and the output capacity of the gear pump can be increased by 50% only by increasing the rotational speed without replacing the pump with large capacity.
2. Speed increase should be carried out slowly. Do not make the pressure rise sharply, so as to avoid damaging the bearing or blocking the lubrication channel with melt.
3. The melt filter behind the pump outlet should be switched regularly, and should not be operated at high pressure or even pressure upper limit for a long time.
4. In case of power failure or interruption of heat medium circulation for more than 30 minutes, the pump should be disassembled and cleaned and reassembled to avoid damage to the pump caused by poor lubrication of bearings caused by melt solidification and cracking. Bart professional melt pump manufacturer, provides melt pump equipment, including: ZB-F oil heating kettle bottom pump, ZB series dual-shaft drive melt pump, external lubrication melt pump.