Helping maximize production in systems fitted with mix proof valves

Mix proof valves are key components in automated matrix-piped processing plants. The plants can be used for the production of all sorts of products, ranging from food and beverage to pharmaceuticals and cosmetics. The mix proof valves allow for concurrent processing and cleaning of the system, while at the same time prevent mixing of media.

Sealing issue:

Trelleborg Sealing Solutions was contacted by a leading international valve manufacturer to help develop the sealing configuration for the new generation of valves. Since the valves were required to be in operation 24 hours per day, the seals come under attack both from high concentration CIP media and super heated steam. Additionally, several of the seals were used dynamically.

Sealing requirements:

• All sealing materials need to comply with FDA standards
• Have good chemical resistance to oil and fat, ozone and aging
• Allow for a thermal range up to 200°C / 392°F
• Withstand cleaning fluids at a concentration up to 5% acids at 100°C / 212°F and 5% bases at 40°C / 104°F
• Withstand sterilization in steam

Solution:

Trelleborg Sealing Solutions worked with the valve manufacturer from initial development of the product. By using FEA (Finite Element Analysis) and 3D modeling we identified the best geometry for an engineered seal to maximize sealing integrity. FKM V8605 was selected due to its chemical compatibility to production media as well as cleaning regimes and steam.

Result:

The recommended sealing configuration has been fitted in volume to valves in a variety of liquid handling situations. They are proving to withstand CIP and SIP regimes, lengthening intervals between planned maintenance and maximizing production yield.