【Pump Trivia】About Seals

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last updated：Dec 12, 2022

日本クロイド工業

Official site

We will introduce representative seals (shaft sealing devices) used in the rotating parts of pumps!

There are two typical seals used in the rotating parts of pumps: "mechanical seals" and "packing seals." Packing seals seal the fluid inside the pump through contact pressure. In the shaft sealing area of the pump, a slight leakage that travels along the shaft surface is necessary for cooling and lubrication of the packing. On the other hand, mechanical seals are devices that minimize fluid leakage, offering the advantages of low leakage amounts and infrequent replacement. 【Features of Mechanical Seals】 ■ Shaft movement: Rotation ■ Leakage amount: Extremely low ■ Lifespan: Long ■ Power loss: Small friction area and friction coefficient result in low power loss ■ Replacement work: Requires disassembly of the pump *For more details, please refer to the PDF materials or feel free to contact us.

Related Link - http://www.cloid.co.jp/index.html

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【Features of Grand Packing】 ■ Shaft motion: Rotation and reciprocation ■ Leakage amount: Some leakage is necessary to prevent seizure ■ Lifespan: Relatively short ■ Power loss: The friction area and coefficient of friction are large, resulting in relatively high power loss ■ Replacement work: It is possible to replace without disassembling the pump *For more details, please refer to the PDF document or feel free to contact us.