Pump industry suppliers to tell you: why are multistage pump seal damage

why multistage pump seal damage

the failure reasons of multistage pump seal for damage and two kinds of natural damage. Multistage pump seal in open and close a za produces bruises, bruised, against damage. Between the sealing surface, mechanical damage. Under the action of high temperature and high pressure permeable leakage occurred atoms, adhesion phenomenon. When the two seal face each other while moving, adhesion pull to tear easily. Multistage pump seal face looks coarse degree is higher, this kind of phenomenon occurs more easily.

medium activity for multistage pump sealing surface wear, flushing, cavitation. Of fine particle in medium resistance to offend sealing surface, make its local damage, high-speed medium directly flush seal face, make its local damage, medium mixed flow and partial vaporization, angry bubble production blasting shock sealing surface, cause local damage. Multistage pump medium erosion and chemical erosion alternate effect, sealing surface erosion will be strong.

sealing surface machining quality is bad, mainly expresses in the sealing surface defects such as cracks, porosity and clamp design. Sealing surface contact each other, the sealing surface contact with closed body and the body and the medium concentration, poor oxygen concentration, occur potential difference, produce electrochemical etching, which the anode side of the sealing surface erosion. However, sealing surface near the medium in the case of no current, medium directly with sealing surface chemistry, form chemical erosion, erosion seal face.

because of the overlaying welding and heat treatment specifications improper selection and overlaying welding and heat treatment process control caused by the bad sealing surface hardness is too high or too low, because the material error or improper heat treatment differences caused by uneven sealing surface hardness, corrosion resistance, mainly because of the underlying metal in welding process blow to the dilute the sealing surface of alloy composition.

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