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Types of Mechanical Seals for Centrifugal Pumps
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Engr. Shafiul Bari
Shafiul Bari is a seasoned Marine Engineer with extensive experience in ship design, maintenance, and marine propulsion systems. With a deep technical knowledge of ship engineering and a passion for advancing maritime technology, Shafiul shares practical insights and expert advice to help marine professionals and enthusiasts better understand the complexities of ship systems. Through his website, he aims to bridge the gap between technical theory and real-world application, fostering a community of informed and skilled maritime engineers.
When not immersed in ship engines and technical manuals, Shafiul enjoys exploring the latest innovations in marine technology and mentoring aspiring marine engineers.
View Author Profile →- Balanced seals
- Unbalanced seals
- Pusher seals
- Non-pusher seals
- Conventional seals
- Cartridge seals
Design
A basic mechanical seal contains three sealing points.
1.The stationary part of the seal is fitted to the pump housing with a static seal –this may be sealed with an o-ring or gasket clamped between the stationary part and the pump housing.
(Highlighted in red below, left the stationary part and right the rotary portion)
2.The rotary portion of the seal is sealed onto the shaft usually with an O ring. This sealing point can also be regarded as static as this part of the seal rotates with the shaft.
3.The mechanical seal itself is the interface between the static and rotary portions of the seal.
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