When selecting the mechanical seal for any applications consider the following factors:
1) Liquid or fluid to be pumped: The first and the most important factor to consider while selecting the mechanical seal for the centrifugal pump is the liquid or the fluid to be pumped. If ordinary liquid like water is to be pumped, then conventional mechanical seal with ordinary materials can be selected. In fact in many water pumps ordinary glands are used as the sealants since any leakage of water to the external atmosphere is not dangerous. But you can always see the water dripping from the pumps using ordinary glands.
If the pump has to handle corrosive liquids like acids, it is very important to select corrosion resistant materials for the mechanical seals. Some of these materials can be stainless steel, bronze or hastelloy. The mechanical seals also comprise of the mating surfaces and these should also be made up of corrosion and wear resistant materials like ceramic, silicon or tungsten carbide, carbon etc. For the corrosive environments the materials for the stationary parts of the mechanical seal can be Teflon, Buna, EPR or Viton.
Choosing the correct materials for the hazardous liquids is very important else there will all the chances that the materials would fail and the liquid would leak to the atmosphere. This can be very dangerous to the people moving around the pumps and also to the atmosphere.
Changsha Zoomlian Pump Co., Ltd, established in 1989, is an enterprise which engages in the production and sales of multistage pumps, centrifugal pumps, single stage pumps, inline pumps, split case pumps, sewage pumps, submersible pumps, fire pumps, oil pumps, irrigation pumps, chemical pumps, boiler feed pumps etc. Our products have a good reputation in the domestic and foreign markets covering the fields of energy, mining, metallurgy, petroleum, chemical industry, building materials, textiles, food, marine development, national defence construction, urban construction etc.
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