Simplifed Seals New Mechanical-Split Seals for Large Water Pumps

Editor: Gabriele Ilg

A.W. Chesteron is highlighting a new product — the 442C cartridge split-mechanical seal — that is poised to simplify installation and maintenance for pump users in water-related industries.

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Laurent Prunier, marketing coordinator, demonstrates the 442C mechanical seal's simple installation technique.
Laurent Prunier, marketing coordinator, demonstrates the 442C mechanical seal's simple installation technique.
(Picture: Page Bailey)

Released earlier this year, the new seal is intended for use with large water pumps in a variety of applications, including water and wastewater treatment, cooling water, stormwater handling and hydroelectric power generation. With proven operation and reliability in many U.S.-based installations, the company is now bringing its split-mechanical-seal technology to Europe with the 442C’s.

These seals, the third generation of their product line, were developed with a special focus on simplifying seal installation and maintenance, says Marco Hanzon, A.W. Chesteron marketing manager for the Europe & Middle East region. “Maintenance for 442C seals requires no disassembly of the pumping equipment, which is a key advantage to users,” explains Hanzon, “because the large pumps where 442C seals are installed may require multiple days and extremely high costs for disassembly.”

Short axial length and flexible gland positioning contribute to the seals’ ease of installation. Standard spare-parts kits enable lower costs for inventory and maintenance. Furthermore, the seals are Atex-approved, says Hanzon, making them suitable for use with mixers and agitators. The entire 442 product range of split seals features seal sizes ranging from 25 to 700 mm. According to Hanzon, the 700-mm model, the largest currently available, has been demonstrated in an industrial installation on the U.S. West Coast. A.W. Chesterton is also exhibiting the 170 cartridge seal for slurries. According to Hanzon, 170 seals can handle severe slurries with up to 40 % solids present without the need for flushing. The elimination of small parts and clog-prone clearances makes these seals especially suitable for use in harsh slurry environments, says the company. Additionally, A.W. Chesterton is showing a specialized radial gas-sealing technology that features integrated controls.