Mixproof Sanitary Divert Double Seat Mix Proof Valve

A mixproof valve separates process fluids at a shared pipeline junction while allowing controlled routing and in-place cleaning. Its defining function is to keep incompatible fluids apart through independent seals and a leakage chamber, reducing the chance of product cross-contamination during transfer or cleaning.

How Dual Sealing Creates a Safer Flow Path

In a pneumatic sanitary design, the main valve can remain normally closed until compressed air actuates the valve head. Two independent seals around the main core create a chamber between sealing points. During normal isolation, any seal failure can direct fluid toward the outlet instead of the adjacent process line. This arrangement is the foundation of many double seat valves used in hygienic fluid handling.

For the clamped valve described on the product page, SS304 or SS316L construction is available, with sizes from 1.5 to 4 inches and a maximum working pressure of 6 bar. The design is intended for water and oil service, with PTFE, EPDM, or NBR sealing options and a working temperature range of -10°C to 120°C. A 4–8 bar compressed-air supply operates the pneumatic head.

CIP Performance Depends on Internal Geometry

CIP is not simply a matter of adding a cleaning port. The sealing chamber and valve core must expose the areas where residue can collect. During cleaning, flow is directed toward the valve core so that the internal surfaces and sealing zones can be flushed. This reduces retained product and supports repeatable sanitation cycles.

A sanitary divert valve may perform route switching, while a mixproof configuration adds fluid separation through its dual-seal architecture. The choice depends on whether the line needs simple diversion or simultaneous isolation of incompatible media.

Where Mix Proof Valves Fit

Mix proof valves suit food, beverage, dairy, brewing, cosmetics, and biopharmaceutical process lines where hygienic separation and cleaning are required. They are especially useful around transfer points, product changeovers, and CIP routing.

Before selection, the process should be checked for fluid compatibility, pressure, temperature, valve orientation, cleaning sequence, seal material, and required failure indication. A correct combination of leakage detection, pneumatic control, and CIP access gives the mixproof valve a practical role in hygienic flow management.

Product Description