Sealing materials for drainage pumps
There are many kinds of sealing materials for drainage pumps, each with its own advantages and disadvantages. When choosing, it is necessary to comprehensively consider the working environment of the pump and the properties of the liquid to ensure the reliability and durability of the seal. At the same time, regular maintenance and care of the seals is also the key to ensure the long-term stable operation of the drainage pump.
The following is a detailed introduction to the sealing materials of drainage pumps:
1. Type of sealing material
Rubber seal: Rubber seal is a common water pump sealing material with good elasticity, high temperature resistance, wear resistance, chemical corrosion resistance and good sealing performance. Commonly used rubber materials include NBR rubber, EPDM rubber and silicone. However, it should be noted that due to the good elasticity and toughness of rubber sealing materials, leakage problems may sometimes occur.
Polytetrafluoroethylene (PTFE) seal: PTFE seal is particularly suitable for water pumps in high temperature and strong acid and alkali environments. It has the advantages of corrosion resistance, high temperature resistance and non-adhesion. However, the small surface friction coefficient of PTFE may cause it to slide with the other surface and leak easily.
Graphite seal: Graphite seal is a high temperature and corrosion resistant material with good sealing performance, especially suitable for high temperature and high pressure environments. Graphite seals usually use metal or ceramic materials as fillers to ensure their excellent corrosion resistance.
Ceramic seals: Ceramic seals are made of high-strength materials such as alumina and zirconium oxide, and are resistant to high temperatures, corrosion, and wear. Although relatively expensive, they have a long service life and are suitable for the storage and processing of light liquids.
2. Principles for selecting sealing materials
Consider the properties of the liquid: factors such as the pH, temperature, and pressure of the medium will affect the selection of sealing materials.
Consider the working state of the pump: parameters such as the pump flow, head, and pump shaft speed determine the mechanical strength, wear resistance, and corrosion resistance of the sealing material.
