Chemical Equipment Update
Cutting bearing contamination
earing Isolator technology, originally developed by Inpro/Seal in 1977, has been an integral part of increasing the mean time between repair (MTBR)and improving the reliability of a variety of rotating equipment.
As end-users of rotating equipment seek to extend the life of these applications, increasing emphasis is being placed on reducing contamination in the bearing environment. The Inpro/Seal Bearing Isolator is a two part dynamic seal consisting of a stator, most commonly press-fitted into the bearing housing, and a rotor attached to the shaft. The rotor and stator join together to form a non-contacting compound labyrinth seal with no wearing parts. It protects in two ways: bearing lubricant is captured in the inner portion of the labyrinth and flows back to the bearing housing; outside contamination attempting to enter the bearing
housing is captured in the outer labyrinth paths and expelled through a port in the rotor by centrifugal force and gravity.
The Bearing Isolator was invented to replace lip seals as a sealing solution in industrial process equipment, such as pumps, motors, gearboxes, pillow blocks and other types of rotating equipment. Because of their contacting design, friction against the shaft limits the life span of lip seals to approximately 3000 hours. Alternatively, an Inpro/Seal Bearing Isolator lacks any wearing parts thereby sealing the bearing for the life of the equipment. The original Bearing Isolators had been in service for more than 25 years when the pump line on which they were installed was finally taken out of service. Currently there are over 4 million Bearing Isolators installed worldwide. ❒
Fig. 1. Bearing Isolator Technology has consistently increased reliability in motors, pumps, gearboxes, pillow blocks and other rotating equipment applications.
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Inpro/Seal LLC is based in Rock Island, Illinois, USA. www.inpro-seal.com
Are you confident in the performance of your pressure relief systems?
ressure relief systems can have a significant financial and safety impact on process industry
operations. Good pressure relief system design, operation and maintenance are key to:
❒ Safety and environmental performance. ❒ Reduced lifetime costs. ❒ Improved asset reliability. ❒ Process Safety Management performance reporting.
510246EuropeanChemicalEngineer_185x60_gb_4c.qxp:Dammann Services 30.03.2010 13:22 Uhr Seite 1
Pressure relief is fundamental to the continued safe operation of any process and forms part
Over time processes change and systems are modified but it is important that companies remain confident that their installed pressure protective systems continue to offer mitigation against the consequences of both over pressure and vacuum. ABB Engineering Services says failure to recognise the implication of pressure relief can and has caused fatal accidents throughout industry.
of the basis of safe operation for company safety reports required under the Seveso II Directive.
ABB Engineering Services has organised a key conference on pressure relief, on 30th June in Manchester, UK., to promote best practice in this vital area. Eight industry speakers will share their experiences and best practices in managing pressure relief systems across the lifecycle. ❒
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ABB Engineering Services is based in Daresbury, Nr Warrington, Cheshire, UK. www.tinyurl.com/pressurerelief
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Fr. Jacob Söhne GmbH & Co. Germany
Phone +49 (0)571 95580
Request a catalogue!
+49 (0)571 95580 or at www.jacob-pipesystems.eu
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