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Cheese manufacturer installs stainless motors to eliminate salt-initiated corrosion

15 January 2023

As part of an on-going process of maintaining the highest quality standards in conjunction with meticulous attention to hygiene, a leading international cheese manufacturer has implemented a policy of replacing existing conventional DC and AC motors with ‘Marlin’ stainless-steel motors from Lafert.

Specifically, this motor replacement program is designed to eliminate problems relating to salt-initiated corrosion and its consequent maintenance/hygiene implications.

The motors replaced are employed on salt blowers and pumps and range in size up to 7.5kW.

The problems experienced with the DC motors were corrosion of the brushes and motor housing; the first causing time consuming maintenance with the additional risk of intermittent malfunction between routine maintenance duties and, the second, potential corrosion flaking in a hygiene-sensitive environment.

Like the DC motors, the AC machines experienced housing corrosion but, in addition, also suffered from moisture ingress. This often resulted in premature failure and significant downtime, incurring all the extra associated costs and loss of production.

The first Marlin motors, installed over two years ago, were reported to be still running efficiently as compared to the original DC/AC motors which would probably not have lasted 12 months. In addition, the company has not had to fit protective shrouds for the stainless-steel motors, a necessity for the original DC/AC units. These covers were not only an additional cost but also created an environment that could cause hygiene issues as cleaning between the motor and shroud was extremely difficult.

The company is so pleased with the performance and reliability of the new Marlin motors that it is holding some in stock to replace the original painted motors as they fail.

To date, motors ranging in size from 0.37kW to 7.5kW have been installed, either as TENV or TEFC machines.

Principal merits of Lafert’s Marlin stainless motors are their IP66 rating (which makes them suitable for high-pressure hose downs), corrosion resistance, smooth body that will not harbour contamination risk residues, and IEC metric dimensions that make the motors ideal retrofit items. There is also a full range of mounting options.

Marlin motors are available from 0.18kW in a 63 frame to 22kW in a 160 frame. All motors meet or, in some cases, exceed the new mandatory requirements for electric motors up to IE4. They are suitable for either DOL or inverter use.

Lafert Electric Motors Ltd
T. 01270 270022

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