Kalrez
- December 06, 2016
In valve jet printing, a series of inline jets are controlled by valves. These open and shut independently to produce streams of intermittent ink droplets. As the product passes the printhead, these droplets create characters and/or graphics based on grid information.
After each printing run, the printheads are washed by strong solvents or special chemicals to remove all inkjet materials from the printhead. With such aggressive media in the process, Kalrez® is an obvious material choice.
Keep reading to learn more about Kalrez sealing valves.
- November 10, 2016
DuPont Performance Materials (DPM) is a leading innovator of thermoplastics, elastomers, renewable-sources polymers, high-performance parts and shapes, as well as resins that act as adhesives, sealants, and modifiers.
Gallagher Fluid Seals is a long-time partner of DuPont™, predominantly focusing on the Kalrez® line of products which is part of DPM. The latest perfluoroelastomer offering from DPM, Kalrez® Spectrum™ 7275, offers a higher level of sealing performance in the most aggressive chemical processing and manufacturing environments.
- June 28, 2016
DuPont™ Kalrez® 1045 parts were phased out of the Kalrez product line at the end of March 2016. Kalrez 1045 parts have a long history of use in dinitrogen tetroxide (nitrogen tetroxide) service.
This chemical is often used as the oxidizer in rocket propellant, when combined with a hydrazine based rocket fuel. Nitrogen tetroxide is a very strong oxidizer, and Kalrez 1045 is resistant to oxidizing liquids; it has been the product of choice for hypergolic propellant applications.
- May 31, 2016
Dramatic increases in instrument performance and reliability have been achieved where original PTFE gasket seals have been replaced with Kalrez® custom gaskets from the DuPont™ Performance Polymers range of products.
A Finnish manufacturer of process refractometers was utilizing process media at temperatures ranging from -20° to +220°C and pressures from 0.7 bar to 25 bar. These aggressive operating conditions resulted with the PTFE seals needing to be regularly replaced on a 6-12 months operating cycle.
However, after the seals were replaced by Kalrez® custom gaskets, there was no experience of fluid leakage over a 10 year period, even though the sealing products were subject to permanent in-line fluids immersion during this period.