Archive for the ‘Kalrez’ Category

Performance Enhancements for Mass Flow Controllers

Posted on: March 15th, 2013 by admin

Digital Mass Flow Controllers (MFC’s), as typically used in the semiconductor, chemical processing, food and pharmaceutical industries, are designed to both measure and control the flow of various gases and liquids. Applications also occur where MFC’s are used in analytical laboratories for High Pressure Liquid Chromatography. In many applications the gases and fluids are operating at modest temperatures up to 80°C, but can include aggressive media flows which necessitate the use of specialised chemical-resistant elastomer seals.

Most gas flow meters are equipped with seals made of DuPont™ Viton® fluoroelastomer. However MFC’s need O-ring seals and other custom parts that do not swell in the presence of more aggressive chemicals utilised within their wide range of industrial applications. The sealing specialist Dichtomatik Ltd, is an authorised distributor for the DuPont™ Kalrez® range of sealing products, designed to give extended performance when operating with the widest range of chemicals, even incorporating elevated temperature conditions. Tests undertaken with an MFC, fitted with DuPont™ Kalrez® Spectrum™ 6375 O-rings and custom parts, increased reliability of operation and the overall Meantime Between Failures (MTBF) of the equipment.


Advance in DuPont™ Kalrez® Parts Overcomes Challenges of Harsh Oil and Gas Environments

Posted on: July 16th, 2012 by admin

Reliability engineering for harsh oil and gas drilling environments such as deep water and shale has just taken a major step forward with the advent of DuPont™ Kalrez® 0090 perfluoroelastomer O-rings. In rigorous third-party testing for rapid gas decompression (RGD) resistance per the NORSOK M-710 Rev 2 standard, Kalrez® 0090 O-rings received the best possible rating of 0000. The tests were conducted by the independent Materials Engineering Research Laboratory Ltd. (MERL) in the U.K. In contrast to Kalrez® 0090 parts, other competitive seals can pass the minimum requirements of NORSOK M-710 with multiple internal cracks developed during test cycling.


New Seals with RGD & Broad Chemical Resistance for Oil & Gas Industries

Posted on: July 16th, 2012 by admin

Kalrez 0090 perfluoroelastomer O-ring seal products from DuPont Performance Polymers are now available from the UK sealing specialists Dichtomatik Ltd. These products have been developed by DuPont to provide outstanding resistance to rapid gas decompression (RGD) combined with broad chemical resistance, as experienced in the harsh environments of the oil and gas industries. As an official authorised distributor of DuPont Kalrez products, Dichtomatik provide a first class service and can also offer full technical support for customers experiencing sealing problems involving extreme temperature or pressure conditions combined with aggressive fluids.


Enhanced Seal Performance for Freeze-Drying Applications

Posted on: April 16th, 2012 by admin

Freeze-drying processes can involve cycling temperatures in the range of -20°C to +130°C, together with solvents and/or water under medium/high pressures. This combination of aggressive working conditions is conducive to the development of thermal stresses in the seals utilised for the freezer operation. These thermal stresses can also result in associated mechanical stresses leading to premature sealing failures due to cracking and blistering of the seal materials. Dupont™ Kalrez® 6230 perfluoroelastomer (FFKM) parts have been developed to meet such challenging sealing requirements, offering excellent steam cycling resistance up to 260°C.

Heat Resistant Seals Cover Six Years Production in Key Thermo Forming Process

Posted on: March 16th, 2012 by admin

Dupont™ Kalrez® Spectrum™ 6375 O-ring seals, which were fitted into thermo forming moulds producing components utilised in industrial process automation, have operated for six years at production steam temperatures up to 165°C without failure. This period of uninterrupted production has been calculated to represent a cost saving of nearly 140K Euro over the manufacturing period 2005-2010.

Performance Seals for Use where Cleanliness is Critical

Posted on: January 16th, 2012 by admin

Pharmaceutical and food process lines which are required to operate at the highest hygiene levels, utilise pure, high temperature aggressive water (WFI) systems for their SIP (Steam in Place) and CIP (Clean in Place) processes. The operation of repeated steam recycling, however, places severe demands upon any sealing products incorporated within control valves utilised in the process pipework.

Solving Sealing Problems for Flow Control Products

Posted on: December 16th, 2011 by admin

Ball valves, utilising a drilled-through ball rotating in a retaining socket, are widely used for process line control operations within industry. Typical areas of application for these valves include oil and gas, chemical processing, power generation together with pulp and paper industries among many others.


Chemically Resistant Seals Rated to -42°C

Posted on: February 16th, 2011 by admin

The latest innovation in DuPontTM Kalrez® SpectrumTM parts help meet the need for effective sealing performance at extremely low temperatures while maintaining the wide range of chemical resistance typical of Kalrez® perfluoroelastomer parts. Kalrez® SpectrumTM 0040 perfluoroelastomer sealing parts are rated for service at temperatures down to -42°C, a major benefit in equipment used in high latitude, high altitude or other freezing cold environments. Typical applications include chemical and hydrocarbon processing equipment involving cold start-ups, hose couplings for chemical transport equipment and manhole seals for rail cars.


Dichtomatik Authorised Distributor for Dupont Kalrez Seals

Posted on: September 16th, 2010 by admin

Dichtomatik Ltd, specialist supplier of sealing products have been appointed an authorised UK distributor for the Kalrez range of perfluoroelastomer parts manufactured by DuPont Performance Polymers.