Archive for the ‘General’ Category

Using Low Cost Seals can be a Long Term False Economy

Posted on: March 15th, 2013 by admin

Production processes utilising hazardous chemicals such as acids and amines, very often at elevated temperatures of 150°C or more, occur in a wide range of manufacturing industries including oil and gas, chemical, pharmaceutical and semiconductor. The combination of corrosive fluids and high temperatures can be particularly destructive for any sealing elements used in valves, pumps and other equipment forming part of a production process and associated pipework.

Interruptions to production processes through leaks and breakdowns resulting from seal failures can prove to be very costly, as well as having potential ramifications of causing environmental damage and jeopardising workforce safety.

The DuPont™ Kalrez® Spectrum™ 6380 perfluoroelastomer sealing parts are a non-black product specifically developed for chemical processes involving hot, aggressive amines. In addition, this product has an excellent overall chemical resistance and mechanical properties making it suitable for applications involving both static and dynamic sealing requirements. This cream coloured product is a prime choice for sealing operations with harsh aggressive chemicals, and it can withstand a maximum continuous service temperature of 225°C, with short-term excursions to higher temperatures also being permissible.

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High Performance Seals Extend DME Fuelled Transport Operations

Posted on: March 15th, 2013 by admin

Dimethyl ether (DME) burns much cleaner than diesel oils, and is also proving to be an economic and effective alternative fuel or fuel additive for use with gas turbines as well as petrol and diesel powered engines. However, the seals used on diesel engine injector tips must be specified to resist degradation where an aggressive alternative fuel such as DME is being used. Several elastomers and even fluoroelastomers (FKM’s) have been evaluated for use with DME powered engines, but operating temperatures above 100°C have led to seal degradation resulting in reduced engine performance and reliability.

However, the operation of diesel engines powered by DME fuel for commercial passenger transportation, with DuPont™ Kalrez® 6375 O-ring seals fitted to the fuel injectors, has achieved and maintained reliable engine performance without premature seal degradation. The broad chemical resistance of the Kalrez® parts, coupled with their high temperature compatibility enabled a significant improvement in engine performance as well as considerably extending useful operating life.

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Official Dupont™ Licensee Provides Full Technical Support, Service & Product Supplies

Posted on: September 16th, 2011 by admin

Following their appointment in 2010 as an authorised supplier for the Kalrez® range of perfluoroelastomer parts manufactured by DuPont™ Performance Polymers, Dichtomatik Ltd are pleased to announce that they have now also been appointed as an official licensee for the full range of Viton®, Vamac® and Zalak® as well as the Kalrez® finished products available from this world leading supplier.
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