Turcon® Variseal® Hi-Clean eliminates contamination in filling machines

Filling machines have numerous filling heads activated by pistons.

Sealing issue:

A filling machine manufacturer discovered fruit particles were being trapped in elastomer seals used within their filling heads. This led to contamination, which was difficult to clean out due to seal design. In addition, the elastomers were sticking to the piston shaft, impeding piston motion and making filling erratic.

Sealing requirements:

• High chemical resistance
• Withstand CIP chemicals and operate in steam up to 150°C / 302°F
• Compliant with FDA and USP Class VI standards

Solution:

Trelleborg Sealing Solutions recommended replacing the elastomer seal with a Turcon® Variseal® Hi-Clean. As it fitted into the existing O-Ring groove, no equipment redesign was necessary. The stainless steel spring that energizes the seal is encased in silicone. This means that it is easily cleaned and sterilized with no risk of contamination. The low friction characteristics of the Turcon® PTFE based material prevents sticking, even after extended periods of rest. The grade of Turcon® MF material chosen was also compliant to all relevant approvals.

Result:

In application, the Turcon® Variseal® Hi-Clean eliminated all risk of contamination. In addition filling action was improved due to the low friction characteristics of the seal.

More information on Turcon® MF
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