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24. August 2004

Linden Industries expands their Polyurethane & Rexroth Metering Pump Repair Services

Linden Industries, Cuyahoga Falls, Ohio, USA, announced the expansion of their Rexroth polyurethane pump repair services to include RHL (Rotary Power Pumps), Viking & MHR pumps.

They have also increased their range of pumps to which they provide magnetic coupling conversion to include RHL & Rexroth pumps, low-pressure gear pumps, low-pressure feed pumps and day tank agitators.
Linden has seen a surge in the demand for magnetic coupling conversions. The traditional seals used in pumps and agitators often deteriorate leading to leakage of polyol and isocyanate. Depending upon the system and the additives, seals can breakdown frequently, leading to excessive downtime for seal replacement. By converting to magnetic couplings, the inner magnet is isolated within the pump case, seals and therefore leaks are eliminated. The conversion involves replacing the pump drive shaft seal with two magnet assemblies. One is the outer assembly (the driver magnet) and the other is the inner assembly (the driven magnet). The outer assembly is connected to a motor and the inner assembly is directly attached to the pump input drive shaft. When load (torque) is applied, the coupling deflects angularly and the magnets create a force of simultaneous attraction and repulsion. This force is used to transfer torque from the motor to the drive shaft.
Linden Industries maintains a large inventory of Rexroth pumps. They also offer a pump core exchange program, providing a rebuilt replacement pump, while the existing pump is out for service.

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