Applications

The Alfa Laval Unique Mixproof LP-F Valve is designed for use hygienic processes that require product safety and continuous flow management of fluids with large particles that require gentle handling and thorough cleaning across the dairy, food, beverage, and many other industries.

Benefits

• Enhanced product safety
• Spillage-free operation
• Gentle product handling
• Optimized plant efficiency and enhanced cleanability
• Lower lip seal flush

Standard design

The Alfa Laval Unique Mixproof LP-F Valve is comprised of a series of base components, including valve body, valve plug and actuator that support a wide range of applications. It is supplied with a seat lift cleaning function, which enables handling of two different products at the same time, or safe handling of one product while seat-lift cleaning operations are being conducted in the other portion of the valve – all without any risk of cross-contamination. When performing seat lift of the lower plug, the valve simultaneously cleans the lower plug seal as well as the lip seal of the lower sealing element. There are two sizes: 4” and 6”. The standard 6” valve comes equipped with balanced lower plug to protect against the effects of pressure peaks and water hammer. To accommodate 1¾" (45 mm) particles, the 4” valve is not equipped with a balanced lower plug but comes with a boost actuator to accommodate a product pressure of up to 10 bar. Leakage detection holes enable visual inspection without requiring valve disassembly and provide advance notification of parts wear. Few straightforward moveable parts contribute to reliable operation and reduced maintenance costs.

Working principle

TThe Alfa Laval Unique Mixproof LP-F Valve is a normally closed (NC) valve controlled from a remote location by means of compressed air. The valve has two independent plugs and seals to separate the liquids; the space between the seals forms a leakage chamber at atmospheric pressure during every working condition. Leakage rarely occurs but, should it occur, product flows into the leakage chamber and exits through the bottom outlet for easy detection. When the valve is open, the leakage chamber is closed. Product then flows from one line to the other. The radial design of the valve ensures that virtually no product spillage occurs during valve operation. It is possible to adapt valve cleaning and water hammer protection to the requirements of individual process specifications.