Trelleborg Sealing Solutions materials for its new range of static seals for hygienic-design couplings are proven in tests to give outstanding performance. In particular, a newly developed FKM gives unrivalled results for a Fluorocarbon sealing material. Volume swell in all CIP media was minimal and in some virtually zero, indicating that the compound will give long-term sealing integrity for gaskets and O-Rings in pipe couplings
The materials engineered by Trelleborg Sealing Solutions for its new range of static seals for hygienic-design couplings have undergone extensive testing in commonly used Cleaning-In-Process (CIP) media. The tests prove that the materials are well-suited to these applications. In particular, Ethylene Propylene Diene Monomer (EPDM) E7502 and Fluorocarbon (FKM) V8T41 gave best-in-class results for their material types, with V8T41 demonstrating exceptional performance for a fluorocarbon sealing material.
“These results enable Trelleborg Sealing Solutions to give qualified advice and to recommend the optimum material for specific customer applications,” says Steven Farnsworth, Food, Beverage and Pharmaceutical Segment Manager for Trelleborg Sealing Solutions Americas. “Based on our tests we are confident that our new range of static seals for hygienic-design couplings in recommended materials will give long-term sealing integrity. This will contribute to a lower meantime between planned maintenance and overall reduced production costs for users.”
The three materials recommended for hygienic-design couplings, EPDM E7502 and FKMs V8605 and V8T41, underwent various tests, one of which was immersion in 21 commonly used CIP fluids. Along with four other characteristics, the sealing materials were measured for volume swell, a critical determinant of suitability for use in hygienic-design grooves. In all cases but one the volume change of the materials was well below ten percent, the percentage of volume swell that is deemed allowable in such applications. In fact, in most CIP media the change was less than five percent, the percentage of volume swell that is deemed perfectly acceptable in such applications.
The FKM V8T41 gave the best overall performance and one which is exceptional for a Fluorocarbon sealing material. In the demanding conditions created by a combination of a two percent solution of acidic acid, citric acid and formic acid at +140°F/+60°C volume swell of V8T41 was well below five percent. In a one percent concentration of acidic CIP media with oxygen at +104°F /+40°C, virtually no swell was recorded. In addition, the material is also suitable for hot water and steam applications up to +338°F/+170°C.
Filed Under: Couplings, Materials • advanced, Seals