Melt pump inlet pressure need not be too high, generally 3-5MPa can be. In conveying high viscosity fluids require higher inlet pressure. Sometimes in order to enhance the mixing effect of the melt in the extrusion screw, the head of the screw needs higher pressure to increase the reflux, at this time you can adjust the inlet pressure.
The inlet pressure of the melt pump can be easily obtained by adjusting the upstream device (e.g. extruder) to match the flow rate of the melt pump. The large differential pressure reflects the melt pump's ability to build pressure. The sum of the inlet pressure and the differential pressure is the outlet pressure. The outlet pressure depends on the shape of the die, the viscosity of the melt, the flow rate and other factors. Users in the choice of melt pump working temperature and working pressure, in order to meet the requirements of use shall prevail, do not have to choose too high a level. Because the melt pump can work properly at high temperature and high pressure, depending on the melt pump's special materials, structure and the corresponding power unit to support. High temperature and pressure resistant grade of the melt pump, its cost is also higher. Zhengzhou BATTE professional melt pump manufacturers, providing melt pump equipment including: hot melt melt metering pump, high temperature melt metering pump, kettle melt discharge pumps and so on.
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