one. the form of static seal into sealing gaskets and seals in two forms, and application of O-ring seals Youyi The most widely; for dynamic seal, packing seal Chemical pump is rarely used, mainly to the mechanical seal, mechanical seals have a single face and double face, balanced and unbalanced type of points, balanced seal for high pressure medium (usually mean pressure greater than 1.0MPa), double end mechanical seal is mainly used for high temperature, and crystallization, a viscosity, containing particles and toxic volatile media, double-end mechanical seal shall be sealed into the spacer chamber, the pressure is generally higher than medium pressure 0.07 ~ 0.1MPa.
Second, the sealing material
Chemical static Magnetic pump seal materials in general Viton, PTFE special circumstances the use of materials; mechanical seal ring movement is more critical of the material configuration, not on the best of cemented carbide alloy, the high price is one thing, that there is no difference between the hardness does not reasonable, so it is best treated differently according to the media characteristics.
Third, the viscosity problem
viscosity of the medium pump performance impact is great, when the viscosity increases, the pump head curve down, the best conditions of head and flow are declining, while the power of the rise, thus reducing efficiency. General sample parameters on the performance when both transport water, when the transmission medium viscosity should be converted.

2012-04-23

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