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Edward Lowton
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| Home> | Plant, Process & Control | >Seals and sealants | >Leak-free for 10 years |
Leak-free for 10 years
27 November 2015
PTFE seals needed to be replaced on a 6 to 12 month operating cycle at a Finnish manufacturer of process refractometers that was using process media at temperatures from -20 to +220°C and pressures from 0.7 to 25 bar. The seals were then replaced with Kalrez custom gaskets and there has been no fluid leakage over a 10 year period, even though the sealing products were subjected to permanent in-line fluids immersion.
The DuPont Kalrez perfluoroelastomer parts are thermally stable to 327°C, and are resistant to more than 1800 chemicals while retaining high elasticity and long term sealing performance.
The delicate digital detector circuits and fibre optics located within the sensor head of the refractometer are protected by twin gaskets which are now more positively sealed from aggressive process media attack. The elasticity, heat resistance and chemical properties of the Kalrez gaskets have substantially reduced the frequency of costly repairs of the refractometer products, resulting in overall savings for both the manufacturer and end-user customers who benefit from vastly reduced interruptions to their manufacturing and production processes.
The DuPont Performance Polymers range of products is available in the UK from Dichtomatik
