The Optimum Solution for Dairies.     The Unique PMO Mixproof valves provide maximum flexibility and safety in sanitary flow processing by making it possible to handle two different fluids at the same time, with no risk of cross-contamination. Using two independent plugs and seals means a single mixproof valve can often replace two or more valves of other types. This Unique PMO Mixproof valve is based on the well proven and exceptionally flexible design of the Unique Mixproof valves from Alfa Laval. It meets the demands from the 3A/PMO (Pasteurized Milk Ordinance paragraph 15p(B)) standards saying that all movements have to be detectable, as well as the vent tube has to have the same or greater area than the connection pipe. Furthermore, the actuator is fail safe by spring to close. Compliance with M-b344 allows a pasteurized milk product to be in one chamber while CIP solution is in the other chamber.