Sealing problem of chemical pump

No leakage is the forever pursuit of chemical equipment, it is this demand led to the magnetic pump and screen pump application is increasingly expanded.But really no leakage is still a long way to go, such as magnetic pump isolation set of shielding and shielding pump sets of life problem, the material of pitting corrosion problem, the reliability of static sealing and so on.Now on the sealing of some of the basic situation introduction is as follows:
 seal form For static seal, usually only seal and seal two forms, and sealing ring with o-rings used most widely;For dynamic seal, chemical pump packing seal, is scarcely used to is given priority to with mechanical seal, mechanical seal and single side face and double face, equilibrium and non-equilibrium model, equilibrium model is suitable for the seal of high pressure medium (usually refers to the pressure is greater than 1.0 MPa), double end face seal is mainly used for high temperature, easy to crystallization, viscosity, containing particles, and poisonous volatile medium, double end face machine sealing should be added spacer to the sealed cavity, the pressure is generally higher than that of medium pressure is 0.07 ~ 0.1 MPa.

This chemical pump seal material static sealing materials generally adopts the fluorine rubber, special situation to adopt ptfe material;Mechanical seal ring materials configuration is the key activity, not carbide carbide is best, the price is high on the one hand, both no hardness difference is not reasonable, so it's best to discriminate based on the medium.

Medium viscosity affect the performance of the pump is great, when the viscosity increases, the pump head curve dropped, the best working condition of the head and flow rate were decreased, while the power, and low efficiency.General sample number for reference when water performance, when conveying viscous medium should be reduced (different viscosity correction factor can be refer to the relevant conversion chart).For high viscosity pulp, cream and viscous fluid conveying, suggest that choose the screw pump, G single screw pump suitable medium viscosity of up to 1000000 CST.

Article from: OKorder construction material. Official report to the superior reference:http://www.okorder.com