High-temperature pump is a positive displacement pump, work rely on the main and driven gears caused by the intermeshing changes in the volume of work to transport the melt. KCG, 2CG high temperature gear pump for conveying solid particles and fibers, non-corrosive high temperature liquid medium temperature up to 250 ℃, the viscosity of 5-1500 cst. When the gear rotates, the melt enters the tooth grooves of the two gears of the suction chamber. As the gear rotates, the melt is brought into the discharge cavity from both sides, and the gears mesh again to make the melt in the tooth grooves to be squeezed out Cavity, pressure delivery to the outlet pipe. As long as the pump shaft rotates, the gear presses the melt down to the outlet side. High temperature gear pump routine maintenance (l) pump disintegration and cleaning, heating, cooling, starting and stopping should be strictly in accordance with the provisions of the operation, in order to avoid undue losses. (2) Care should be taken to maintain the stability of the population pressure of the booster pump so that it has a stable volumetric efficiency in favor of the pump itself and the stability of the downstream spinning quality. (3) The population is negative pressure of the packing shaft seal pump, packing should be kept at a pressure higher than the atmospheric pressure. When the back pressure is reduced, the pressure of the stuffing box should be adjusted in time, otherwise the pump will be sucked into the air and the belt will be broken. This will affect the pelletizing and cause the discharge of the pelletizer. (4) to check the temperature of the heat medium jacket, the main body and the front and back cover of the heat medium temperature to be consistent. (5) Every time the output increases, it is necessary to record the output, speed, output, inlet pressure and current value at the time, and compare the data before and after, and carefully analyze them so as to find the anomalies as soon as possible and deal with them in time.