Hygienic double-seat mixproof valves
The Cipriani Harrison hygienic double-seat mixproof valve prevents the mixing of two incompatible media. It allows the simultaneous flow of product and cleaning agents without the risk of cross-contamination. This valve ensures process integrity, optimal hygiene and increased operational efficiency.
The valve has two spindles and two seats, ensuring complete separation of the two products. The pop-up function and separate rinsing of the leak chamber ensure complete and reliable cleaning. With its one-piece, self-draining body and maintenance-free, sealed actuator, it is a robust, hygienic and easy-to-maintain solution for modern process systems. It can be used in the food, pharmaceutical and cosmetic industries and in CIP systems.
Typical applications: food, dairy, wine, beer, beverage and cosmetics industries.
FAST FACTS
FEATURES AND BENEFITS
The Cipriani Harrison hygienic double-seat mixproof valve prevents the mixing of two incompatible media. It allows the simultaneous flow of product and cleaning agents without the risk of cross-contamination. This valve ensures process integrity, optimal hygiene and increased operational efficiency.
The valve has two spindles and two seats, ensuring complete separation of the two products. The pop-up function and separate rinsing of the leak chamber ensure complete and reliable cleaning. With its one-piece, self-draining body and maintenance-free, sealed actuator, it is a robust, hygienic and easy-to-maintain solution for modern process systems. It can be used in the food, pharmaceutical and cosmetic industries and in CIP systems.
Typical applications: food, dairy, wine, beer, beverage and cosmetics industries.
| Max. discharge pressure | 6 bar | |
| Pneumatic actuator supply pressure: | 5-8 bar | |
| Max. operating temperature: | 140 °C | |
| Available sizes: | DN40 DN50, DN65, DN80, DN100 | |
| Available connections: | sanitary clamp, butt weld or others on request | |
| Control types: | 90° open/close hand lever, universal latch (360°), inductive valve with proximity switch, pneumatic actuator (NO or NZ) | |
| Pump materialss: | Steel parts in contact with the medium: AISI 316L or AISI 304L | |
| Seals (FDA compliant): |
EPDM/PTFE, HNBR/PTFE, Viton (FPM)/PTFE, VMQ/PTFE | |
The Tapflo hygienic mix-proof valve enables the simultaneous flow of two liquids thanks to its double-seat design, which creates a chamber that isolates the liquids passing through the two bodies. In the event of a seal failure in either seat, the liquid flows to the leak detection connection, directing the medium to the lower part of the valve, preventing the flows from mixing. In the event of a sudden pressure increase, the seat is raised and allows the fluid to flow through the lower opening without interfering with the operation of the upper seat, thus preventing the two media from mixing. The valve is equipped with a chamber cleaning function, whereby the chamber between the two seats can be cleaned independently by activating the appropriate seat.

The self-draining spherical body is made of forged stainless steel with increased acid resistance. The spherical shape of the valve body ensures minimal flow resistance, which in turn offers minimal pressure drop.
The one-piece compact design of the valve body saves space during installation. Cipriani Harrison double-seat mixproof valves are easy to maintain – the valve body and yoke are connected by a hygienic clamp band, which allows for easy and quick installation and removal of the valve. All seats and seals are made of FDA-approved materials. Balanced valve stems protect the valves against hydraulic shocks.
Tapflo’s hygienic double-seat mixproof valves are manufactured based on a modular design platform, which can be adapted to specific process requirements as needed.
Tapflo mixproof double-seat valves are manufactured from a single piece of solid bar – this minimises the number of connections, ensuring the highest level of hygiene.
The standard double-seat valve has compact dimensions thanks to its single-piece body design and maintenance-free, sealed actuator. The well-thought-out and optimised design ensures lightness without compromising the functionality and durability of the valve.
Hygienic double-seat mixproof valve DS-B
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Hygienic double-seat mixproof valve DS-SC
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Hygienic double-seat mixproof valve DS-TB (tank bottom valve)
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Hygienic double-seat mixproof valve DS-BP (ready for installation)
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Each configuration ensures maximum reliability, system safety and process efficiency, meeting the stringent hygiene requirements of modern production facilities.

| Max. discharge pressure | 6 bar | |
| Pneumatic actuator supply pressure: | 5-8 bar | |
| Max. operating temperature: | 140 °C | |
| Available sizes: | DN40 DN50, DN65, DN80, DN100 | |
| Available connections: | sanitary clamp, butt weld or others on request | |
| Control types: | 90° open/close hand lever, universal latch (360°), inductive valve with proximity switch, pneumatic actuator (NO or NZ) | |
| Pump materialss: | Steel parts in contact with the medium: AISI 316L or AISI 304L | |
| Seals (FDA compliant): |
EPDM/PTFE, HNBR/PTFE, Viton (FPM)/PTFE, VMQ/PTFE | |