Double Seat Mixproof Valve

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.

Common applications for the Double Seat Mixproof Valve include:

Food & Beverage
Pharmaceutical
Personal Care & Cosmetics
Water & CIP (Clean in Place) Systems

Specifications

Design & Operation

Configurations

Specifications

Feature	Specification
Material	Stainless Steel 304:/316L
Size Range	DN25 – DN150 / 1” – 6”
Max Line Pressure	6 Bar
Supply Pressure for Actuator	5-8 Bar
Sterilisation Temperature	Up to 140°C
Certifications	Up to 140°C

Design & Operation

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
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
Maintenance Simplicity: Hygienic clamp connections allow for quick assembly and disassembly

The Double Seat Mixproof Valve is available with a choice of sealing material combinations:

EPDM/PTFE
HNBR/PTFE
FPM/PTFE
VMQ/PTFE

Configurations

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

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