The CHEM-RING is an "O" Ring, consisting of a seamless and uniform Teflon encapsulation, which completely encloses the core material of Silicone or Viton®. In brief, the seal is manufactured by pressure injecting the rubber core material into thin wall Teflon tubing. This eliminates any potential gap between the core and tube wall.
The Teflon tubing is joined by a special heat moulding process to give a true, seamless encapsulation. On our Vulcan CHEM-RING, the mould area exhibits no discernable different characteristics to the rest of the circumference of the seal. There are no joints nor ridges to affect the seal's performance nor life.
The nature of the moulding process is critical to the quality of the Ring. Standards for the manufacture of moulded rubber "O" Rings call for close tolerances on the I.D.'s and, particularly, the cross sections of the rings. Outside these tolerances, any step in the cross section can severely affect the "O" Rings ability to seal.
FEP Encapsulated "O" Rings are hand moulded in a very precise and skilled operation. Traditional production processes have been unable to guarantee absolutely the tolerances in the join area. Recognising the importance of Quality Assured product, certified to conform to recognised standards, we have developed our Q Standard process. All aspects of manufacture of a Q Standard ring go through a rigid Quality Control procedure, from specification and size tolerancing of the rubber cord and FEP tubing via utilisation of an advanced new precision moulding technique in production, to final inspection.
A ring specified and produced via our Q Standard, is certified and guaranteed to be within the tolerances of the relevant size British, or International Standard, moulded rubber "O" Ring. These seals are offered as exceptional quality for difficult applications.
All Vulcan CHEM-RINGS are tested before leaving the factory and warranted to be free from defects in materials and workmanship. Our liability thereunder is limited to the purchase price, or replacement, of the rings proved defective.
Viton is a registered trademark of Dupont Dow Elastomers.
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