The sealability of conventional electrically insulating sealing materials deteriorates at high temperatures and even fails at moderate temperatures, if the sealing materials are subject to rapid changes in temperature. The commonly used thermoplastic resins and fluoroelastomer seals fail instantly at temperatures above 450°F (232°C), and fail slowly at much lower temperatures, especially if temperatures swing or change rapidly.

Queon™, our innovative and proprietary electrically insulating sealing compound, offers exceptionally high sealability [from -300°F (-184°C) to 650°F (343°C)] for compression seals under high pressure conditions. 

Queon™ is stable in both reducing and oxidizing environments of many gases and aqueous solutions, such as super critical steam and pressurized nuclear primary heat transport coolants.  Because its thermal expansion coefficient closely matches most of the metal sealing gland, it is not subject to the effect of the cycling or rapidly changing  temperatures, such as water quenching from 650°F (343°C).

Queon™ is the only known material in the world for sealing electrical conductors in metal sealing glands or compression feedthroughs that are operable at temperatures between 400°F (200°C) and  650°F (343°C). Corr Instruments offers a whole ranges of dimensions of Queon™ seals for both regular and electrical feedthroughs / sealing glands.

Building upon the innovative sealing compound, Queon™, Corr Instruments offers a full range of exceptionally high performance compression feedthroughs, packing or sealing glands and fittings. Our feedthroughs are the world's only demountable electrical feedthroughs that have combined exceptional pressure, sealability, and voltage ratings over a wide range of temperatures [-300°F to 650°F (-184°C to 343°C)].