The Alfa Laval Unique Mixproof mixproof valve routes two incompatible fluids through a shared valve body simultaneously while maintaining physical separation between them. This is achieved through two independent plugs and seals where the space between the seals forms a leakage chamber at atmospheric pressure. This radial design ensures that virtually no product spillage occurs during valve operation, protecting the process environment and reducing waste.

How does the leakage chamber detect seal wear?

Leakage detection is passive and requires no disassembly for visual inspection. The chamber between the two sealing elements remains at atmospheric pressure. Should a leak occur, the fluid enters this chamber and exits through a dedicated bottom outlet. This provides advance notification of parts wear and allows for scheduled maintenance rather than emergency repairs. Leakage detection holes in the body confirm the valve state during every working condition.

What are the four cleanability tiers of the Unique Mixproof?

The valve is available in four pre-configured versions to meet specific cleanliness demands. The Unique Mixproof Basic provides fundamental cleaning of the plugs and leakage chamber. The SeatClean version introduces seat lift functionality, whereas the HighClean version adds external CIP connections for the leakage chamber and plugs. For the most demanding hygienic processes, the UltraClean version offers the highest level of cleanability. These modular configurations ensure the valve meets specific process requirements without unnecessary complexity.

How do balanced plugs prevent mixing during pressure spikes?

Pressure peaks in a processing line can occasionally force a standard plug off its seat. Balanced plugs solve this by equalizing the hydraulic forces acting on the plug, ensuring it remains closed regardless of pressure transients. This mechanical safeguard is essential for maintaining safety in high-capacity matrix systems. The valve can be configured with balanced or unbalanced plugs depending on the specific pressure profile of the installation.

What is SpiralClean and when is it required?

The SpiralClean system is an option for cleaning the spindle and the leakage chamber using a spiral flow pattern. This system improves the efficiency of Cleaning-in-Place (CIP) cycles by ensuring better coverage of internal surfaces. It can be specified alongside the lower flush option, which cleans the lower seal without requiring an external CIP connection. These options are ideal for processes with high cleanability demands or where reducing water and chemical consumption is a priority.