Importance of Sealing Mode Selection for Melt Pump

　　The common faults of the melt pump mainly occur in the sealing, so it is very important to choose the sealing method and sealing material for the melt pump. The main sealing surface of the melt pump is between the pump body and the front and rear cover, the drive gear shaft and the inlet and outlet flange. Zhengzhou Bate Melt Pump Company provides packing and mechanical seals for melt pumps.

　　Packing seal is a commonly used form of shaft seal of melt pump, but the selection of packing, sealing performance and structure design directly affect the sealing effect of melt pump. For the essence of packing seal: it is through the soft property of packing, under the action of axial compression force, the radial impediment to the passage of possible melt leakage, and the force exerted on sealing packing must make the contact stress between packing and sealing shaft surface block the effect of sealing melt pressure. Therefore, the radial contact pressure at the bottom of the packing box must be equal to or greater than the pressure of the sealed melt. The packing sealing device provided by Bart Melt Pump Company is usually composed of packing box, soft packing and packing cap. The soft packing can be high temperature resistant carbon fibers, which are placed between the packing box and the pump shaft. The pressure of the packing cap is pressing to make it deform and seal.

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