1. Case of pump
Pump shell is generally cast iron parts, if it is to transport corrosive media, the general use of stainless steel structure. It is affected by the mechanical or thermal stress. When the pump at work due to cavitation effect or impact in winter without releasing the pump shell and the water is frozen by cracking, such as heavy damage cannot be repaired should be replaced with new pump shell.
Of course, in the case of product quality is guaranteed, if the normal use, the pump casing life is equivalent to the factory.
So, if customers choose the kendelai products, for the pump shell, which comprises a pump body, pump cover, does not belong to the vulnerable parts, so there is no need to keep.
2.The pump shaft is generally carbon steel, commonly used in steel, 2Cr13, etc. 45:
Due to manufacturing quality, use or installation and other reasons are also easy to damage. Pump shaft may appear crack, bending, shaft neck wear, thread damage, etc., also may be a fracture accident. If the damage can not be repaired, the new shaft should be replaced.
3.Sleeve :
The role is to protect the shaft sleeve. If the packing seal is subjected to friction between the sleeve and the shaft packing. If the use of mechanical seal, shaft sleeve is generally not affected by the friction, but when the mechanical seal failure damage, damage to the sealing sleeve friction may be damaged by mechanical.
So, should be as sleeve wearing parts, standing.
4. Impeller:
The impeller is an important part of the water pump, for the normal delivery of water for the occasion, made of cast iron; for the delivery of chemical media, with stainless steel manufacturing. The impeller may be a crack, due to cavitation on the surface of the formation of pit or hole hole, long term impact mill to make the blade is thin or eccentric wear, and even crushed by debris. Some defects can be repaired; some defects can not be repaired, that is, a new impeller should be replaced.
So, although the impeller does not belong to the vulnerable parts, but also should be standing.
5. Bearing:
Bearing sliding bearing is made of copper's tin alloy, the wear resistance is poor, is one of the most vulnerable parts easy to wear and burned out, the bearing can generally be repaired or replaced with new parts. The average service life of the rolling bearing is 25000 hours, but it is not installed properly, it is used for a long time or poor maintenance, and it is easy to wear or damage.
So, the bearings should be standing.
6.The mouth ring:
The mouth ring, also known as the reduction of leakage or grinding ring, it is one of the most easily worn parts of the pump. Wear can be repaired after the replacement of the new. The inner diameter of the outer diameter of the impeller should be configured according to the outer diameter of the impeller. Such as the impeller inlet diameter can wear, turning, in order to eliminate the grooves and ellipse, then the configuration of reduced diameter reducing leakage ring, impeller inlet diameter can be three times of turning.
Mouth rings should be used as a vulnerable part.
7.Seal:
Including packing seal or mechanical seal. Packed with long will harden and lose their elasticity, make the water pump leak, Water Leakage, the general should be replaced with new packing. Mechanical seal life is generally 2 to 3 years, so it should be standing.
8. Oil seal:
The oil seal is rubber products, easy to wear and aging, the general need to replace the new parts.
9.Pump auxiliary seal:
Inside the pump with a number of sets of O - shaped, rectangular ring, etc., these auxiliary seals are generally used in rubber or other non-metallic materials. Maintenance needs to be replaced.
