Variseal Ultra-Clean uses an enclosed spring to activate the seal, thus ensuring cleanliness while it works. The best material for the ultra-clean seal is Turcon MF, a proprietary PTFE for super clean environments. Turcon MF compounds are produced from high purity PTFE grades and additives, and are compliant to FDA 21 CFR 177.1550, 3-A, and USP Class VI. A smooth finish, with high gloss and low porosity, avoids the risk of contamination build up and reduces particle shedding. Materials withstand high pressures (in excess of 100 bar or 1,450 psi), temperatures from -423 to 500 F, and a vacuum capability of 10-9 mbar x l/s in air.

Trelleborg Sealing Solutions, Box 176, 2531 Bremer Rd, Fort Wayne, IN 46801, (260) 749-9631, info.ims.ca/18359-257