The Alfa Laval Unique Mixproof Valve is a versatile, highly flexible double block-and-bleed valve for the safe and efficient management of fluids at intersection points in matrix piped systems. The valve enables the simultaneous flow of two different products or fluids through the same valve without the risk of cross-contamination. Modular design and a wide variety of options enable the valve to be customized to meet any process requirement—whether higher demands on cleanability and the ability to withstand pressure peaks.
The Alfa Laval Unique Mixproof is designed for continuous flow management and process safety in hygienic processes where product safety is at the top of the agenda across the dairy, food, beverage and many other industries.
Benefits:
- Enhanced product safety
- Cost-effective, spillage-free operation
- Optimized plant efficiency and enhanced cleanability
- Leakage detection and leakage chamber cleaning
- Fully configurable to fit your exact needs
Standard design
The Alfa Laval Unique Mixproof Valve is comprised of a series of base components, including valve body, valve plug, actuator, and cleaning options and accessories that support a wide range of applications. There are four pre-configured versions: the Unique Mixproof Basic; the Unique Mixproof SeatClean Valve; the Unique Mixproof HighClean Valve; and the Unique Mixproof UltraClean Valve. 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. The valve can also be fitted with the Alfa Laval ThinkTop V50 and V70 for sensing and control of the valve.
Working principle
The Alfa Laval Unique Mixproof 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. The 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.
Technical data:
- Max.product pressure: 10 bar;
- Min. product pressure: Full vacuum;
- Air pressure: 8 bar;
- Temperature range: -5°C to +125°C;
- Product wetted steel parts: 1.4404(316L);
- Pther steel parts: 1.4301 (304);
- CIP seals: EPDM;
- Product wetted seals: EPDM;
- Actuator seals: NBR;
- Guide strips: PTFE;
Note for mixed bodies
1. The seat always applies to the smallest valve body.
2. Dimension B is equal with the largest valve body size.
The Unique Mixproof concept offers balanced and unbalanced plugs, seat lift, CIP for the plugs and leakage chambers and any combination in between.
1. ISO 51 (2”)/ISO 76.1 (3”), 11-90, with spiral clean on lower unbalanced plug, group 3 basic actuator incl. seat lift and seat push
2. ISO 76.1(3”)/ISO 51 (2”), 22-90, with lower balanced plug, basic actuator incl. seat lift and seat push
3. ISO 63.5 (2½"), 12-90, with SpiralClean of upper, lower spindle and leakage chamber, upper and lower balanced plug, basic actuator incl. seat lift and seat push
4. ISO 63.5 (2½”), 22-90, with spiral clean on leakage chamber, unbalanced plugs, group 5 basic actuator
5. ISO 63.5 (2½”), 22-90, with lower balanced plug, group 4 basic actuator incl. seat lift and seat push
Balancing flexability:
Hygienic flexibility (spiral clean options):
Standard configurations
To assist you in the selection we have included some standard configurations:
- UniqueBasic
- Unique SeatClean
- Unique HighClean
- UniqueUltraClean
You can either choose these directly or add additional features ensuring that the valve suits your specific needs.
Unique Basic has the basic components, providing significant safety and leakage detection.
- Actuator without seatlift.
- Unbalanced plugs.
- NoSpiralCleanof leakage chamber or plugs.
- Not applicable for 3-body version
Unique SeatClean meets the typical demands of a process valve in the food and drink industry.
- Actuator with seat lift integrated.
- Balanced lower plug, Unbalanced upper plug.
- No SpiralClean of leakage chamber or plugs.
Unique HighClean is sure to meet your processing needs when dealing with sticky products or if no recontamination can be accepted at all.
- Actuator without seatlift integrated.
- Balanced lower and upper plug.
- SpiralClean of leakage chamber as well as of upper and lower plug.
- Not applicable for 3-body version.
Unique UltraClean meets the highest demands for hygienic processing. It has:
- Actuator with seat lift integrated.
- Balanced lower and upper plug.
- SpiralClean of leakage chamber, upper and lower plug
Options
- Male parts or clamp liners in accordance with required standard.
- Control and Indication: IndiTop, ThinkTop or ThinkTop Basic.
- Side indication for detection of upper seat lift
- Product wetted seals in HNBR, NBR or FPM
- Various internal/external surface finish
- 3A (hygienic standard) on request
- Mixed housing (Not applicable for 3-body version)
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