The Alfa Laval Unique Mixproof CIP valve solves a fundamental challenge in hygienic processing: how to route CIP media through a live process line without creating any pathway for cross-contamination. As a double block-and-bleed valve, it maintains a physical separation between the two fluid streams at all times, allowing simultaneous flow of product and cleaning media through the same valve body. This is the defining engineering principle that makes continuous CIP media routing possible in dairy, food, and beverage plants where product integrity cannot be risked.

How does a double block-and-bleed design prevent cross-contamination?

Cross-contamination prevention relies on the double block-and-bleed configuration, which places two independent sealing plugs between the process fluid and the CIP media. Any leakage past either seal is directed to atmosphere through a bleed path, meaning fluid cannot migrate from one circuit to the other. This arrangement gives operators a positive, verifiable separation rather than relying on a single seal that would be undetectable if it failed. For plant teams managing hygienic processes, that distinction in design integrity is directly linked to product safety.

Maintenance-free actuator and spillage control

The Unique Mixproof CIP uses a maintenance-free actuator that requires no routine servicing, and the overall valve assembly contains few moveable components. The plug design is optimised to minimise spillage during actuation, which matters in food and dairy environments where any release of cleaning media into the surrounding area creates both a hygiene concern and a housekeeping burden. Fewer moving parts and a controlled actuation profile translate directly to lower maintenance costs and longer intervals between planned maintenance interventions.

Leakage detection without valve disassembly

Leakage detection is built into the valve body itself. Dedicated detection holes allow operators to perform a visual inspection and identify seal wear without dismantling the valve or interrupting the line. When a leak is present, it becomes visible at the detection hole — a clear signal that wear parts need replacement. For plant teams managing multiple valves across a processing facility, this built-in visibility supports condition-based maintenance decisions and reduces reliance on fixed service intervals.

CIP media routing flexibility across tank cleaning and distribution

The Unique Mixproof CIP is designed for two primary CIP media routing tasks: distributing pressurised cleaning media toward the area that requires cleaning, and directing CIP media through the top of a tank cleaning device into the vessel being cleaned. Both functions are available in a single valve body, and the range of valve body combinations — Types 11, 12, 21, 22, 20, and 30 — gives process engineers the flexibility to match the valve to specific line configurations. Six pipe size options from DN25 to DN100 cover the majority of hygienic process line diameters found in food, dairy, and beverage plants.

ThinkTop V-series integration for sensing and control

For operations requiring continuous feedback and automated control, the Unique Mixproof CIP is compatible with the Alfa Laval ThinkTop V-series sensing and control unit. ThinkTop V-series provides position indication and control signal output at the valve, giving control systems real-time confirmation of valve status without additional field instrumentation. This integration supports both manual and fully automated CIP sequences and fits the same valve body without requiring modifications to the actuator.