The Alfa Laval Leakage Detection Butterfly Valve delivers mixproof protection through a purpose-built leakage chamber housed within the valve disc — an architecture that standard hygienic butterfly valves do not provide. When a seal begins to degrade, process fluid collects in the leakage chamber rather than crossing into an adjacent line. Cross-contamination is intercepted before it reaches the product, not after.

Leakage chamber design: how cross-contamination is stopped at the seal

Two valve body halves enclose a disc fitted with an integrated leakage chamber. A single EPDM seal contacts the product-wetted surfaces — and any breach in that seal directs fluid into the chamber, making leakage visible and detectable before product integrity is affected. Assembly relies on screws and nuts, so disassembly for inspection or seal replacement is straightforward without special tooling. All product-wetted components are 1.4404 (316L) stainless steel; structural parts are 1.4301 (304).

Surface finish and material specification for hygienic processing

Internal surfaces are finished to Ra ≤ 0.8 μm — a standard that limits microbial adhesion and supports effective CIP without aggressive chemical concentrations. The 1.4404 (316L) grade provides corrosion resistance suited to the cleaning agents and process temperatures typical of dairy and beverage lines. EPDM elastomers are rated for operation from −10 °C to +95 °C, covering the thermal envelope of pasteurisation, CIP, and flush-out cycles in food and personal care production.

ThinkTop V-series compatibility for automated CIP sequencing

Alfa Laval ThinkTop V-series units mount directly to the valve actuator — providing position sensing, control signal output, and visual status indication without secondary instrumentation. ThinkTop integration allows the valve to report open, closed, and intermediate positions to a process control system, supporting automated CIP sequencing and reducing manual inspection frequency. An indication unit with inductive proximity switches is also available for installations requiring simpler position feedback.

Size range: DN40 to DN125 for CIP and water management duties

Six nominal sizes span DN40 through DN125 — covering the pipe dimensions found in CIP systems, water management loops, and flush-out circuits across hygienic processing plants. Weld ends are standard across the range, ensuring a secure, cleanable joint consistent with hygienic piping practice. Rated to a maximum inlet pressure of 10 bar (1,000 kPa), the valve accommodates the elevated pressures of high-flow CIP return lines without derating.

Maintenance cost reduction through detectable seal failure

Reduced maintenance stems from two structural decisions: a simple two-body assembly that technicians can service without specialist tools, and a seal design that makes leakage detectable — not silent — before a failure escalates into a product loss or line shutdown. Catching seal degradation early eliminates the downstream costs of batch rejection, line decontamination, and unplanned stoppages. Across a multi-valve CIP manifold, that reliability compounds into measurable uptime gains.