Category of pump wear parts
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This post was last edited by Repairman Xiao Zhao on 2018-6-14 at 17:51. As a buyer, one hopes there are no vulnerable components； As a seller, one wishes all items to be fragile parts. I would like to ask which parts of a pump are considered vulnerable components Are there any relevant standards to regulate this? Which components of centrifugal pumps and magnetic drive pumps are vulnerable parts?
The most prone part to damage in a centrifugal pump is the mechanical seal. A magnetic pump uses silicon carbide bearings. However, after working in this field for so many years and coming into contact with new equipment over time, it can be said that modern equipment, when operated as designed and maintained properly, has a long service life – including its vulnerable components.
The manufacturer’s documentation for mechanical pumps includes a list of vulnerable spare parts. The technical agreement contains a list of spare parts required for startup as well as those needed over a period of two years. Submitting these lists as required is not only a matter of responsibility towards oneself but also towards the company
Standards such as API610 and 685 specify random selection, with a recommendation for spare parts to be kept for two years.
Fragile components are generally seals, bearings, impellers, mouth rings, etc
Mechanical seal, mouth ring, bearing, locking nut, pump body gasket, skeleton oil seal (if the pump is equipped with a skeleton oil seal)
Spares for startup testing mainly include seals and the like. The spare parts for two years mainly include bearings, mechanical seals, couplings, elastic blocks, etc
For ordinary ion pumps, bearings and mechanical seals are sufficient as spare parts; the impeller is considered a part that may fail under abnormal conditions, and the mouth ring can be machined, so there is generally no need to keep backups of it. However, for water pumps, it is advisable to have spares for the impeller.
Centrifugal pump: Packing seal: Shaft sleeve, impeller, flange ring. Mechanical seal: Modular mechanical seal, non-modular mechanical seal, shaft sleeve, impeller, flange ring
Generally, various O-rings, machine seals, I guess.