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Common boiler ignition pump are: three screw pump, screw pump, gear pump, ignition pump, booster pump, heavy oil pump these kinds. How to choose the right boiler ignition pump, depending on the pump to be transported medium conditions and the required work pressure, mainly in the following situations: First, the delivery of heavy fuel oil, due to the presence of more impurities in the transmission medium, choose Three screw pump or gear pump should consider whether the pump material wear! Recommended for the general transport of heavy fuel booster gear pump, booster gear pump gear, shaft generally use high-quality alloy steel, ductile iron pump used, which greatly increased the service life of booster gear pump. Three screw pump, and SM three screw pump material generally used for the ductile iron pump body, screw selection of tin bronze and most of the screw pump mechanical seal, so that if there is impurities in the transmission medium, the mechanical seal damage faster; and from the material is Speaking of the wear resistance of screw pump is not as good as gear pump. Second, if the delivery of light oil, diesel then suggested the choice of SM screw pump or 3Gr three screw pump, due to the low viscosity of light oil or diesel, pump delivery pressure requirements in excess of 2.5MPa, please use SM screw pump or booster Type gear pump, or 3Gr three screw pump working pressure exceeds 2.5MPa is the amount of internal discharge will increase, resulting in pressure on the go.