The Double Seat Mixproof Valve has been designed to allow the simultaneous routing of product and cleaning media without the risk of cross-contamination. This valve offers process integrity, optimal hygiene, and improved operational efficiency. Featuring a single-piece, self-draining body and a maintenance-free sealed actuator, it provides a robust, hygienic, and easy-to-maintain solution for modern process systems.
Design & Operation
Seal Technology
Technical Specifications
Configurations
Our Double Seat Mixproof Valve, based on Cipriani Harrison’s proven design, features:
- Single-Piece Construction: Forged from solid bar stainless steel for ultimate hygiene, minimising joints and dead legs
- Self-Draining & Hygienic Shape: Spherical body design for minimal flow resistance and enhanced cleaning
- Seat Lifting Mechanism: Allows for individual seat cleaning without opening the valve or disrupting the process
- Leak Detection Port: Built-in leak detection to ensure maximum process safety
- Maintenance Simplicity: Hygienic clamp connections allow for quick assembly and disassembly
The modular design allows us to tailor valve configurations to specific process requirements, ensuring flexibility for future plant expansion.
The Double Seat Mixproof Valve is available with a choice of sealing material combinations:
- EPDM/PTFE
- HNBR/PTFE
- FPM/PTFE
- VMQ/PTFE
These options ensure compatibility with a wide range of process media, temperatures, and cleaning agents, guaranteeing long service life and low maintenance requirements.
| Feature |
Specification |
| Material |
Stainless Steel 304L/316L |
| Surface Finish |
Highly polished, acid-resistant, self-draining design |
| End Connections |
Sanitary Clamp, Butt-Weld |
| Size Range |
DN25 – DN150 / 1” – 6” |
| Max Line Pressure |
10 Bar (145 psi) |
| Supply Pressure for Actuator |
6 Bar (87 psi) |
| Sterilisation Temperature |
Up to 135°C |
| Certifications |
3A, FDA |
Tapflo UK’s Double Seat Mixproof Valve series includes a range of options to suit specific application needs:
DS-B Mixproof Valve
- Standard base model for reliable cross-contamination prevention
- Leak detection system
- Optional external seat cleaning available
DS-SC Mixproof Valve
- Perfect for complex process systems handling incompatible media
- Balanced plug design for pressure shock absorption
- Built-in leak detection and individual seat lifting for enhanced CIP
DS-TB Mixproof Valve (Tank Bottom Valve)
- Designed for tank outlet applications
- Self-draining body with balanced plug
- Integrated seat lifting for tank cleaning during operation
- External seat cleaning option available
DS-BP Mixproof Valve (Build-Prepared Version)
- A future-ready solution
- Initially installed as a transition piece; can later be upgraded to a full valve
- Ideal for scalable systems requiring expansion flexibility
Each configuration ensures the highest reliability, system safety, and process efficiency, maintaining the strict hygiene demands of modern production facilities.
