Enhanced product safety
Double seat design supports safe routing of two different fluids through the same valve without mixing risk.
Product SafetyMixproof
Mixproof Valves
Hygienic Valves — Double Seat (Mixproof)
Mixproof Valves (Double Seat Valves)
Mixproof (double seat) valves are designed for maximum product safety at intersection points in hygienic plants. Using a double block-and-bleed principle, they help prevent cross-contamination when two different fluids are routed through the same valve, while enabling leakage detection and advanced cleanability options for demanding dairy, beverage, food and aseptic processes.
Overview
Mixproof valves (double seat) are built for hygienic matrix piping where many lines intersect. The design uses two independent plugs and seals to separate liquids. The space between the seals forms a leakage chamber at atmospheric pressure for safe leakage handling and clear indication.
Working principle (simple explanation)
- Two independent seals separate two fluids inside one valve body.
- The leakage chamber between the seals provides an “open to atmosphere” safety zone.
- If a seal wears, any leakage is directed into the chamber for easy detection instead of mixing fluids.
- Cleaning options can be configured to meet higher demands on cleanability and process safety.
Where mixproof valves are used
- Intersection points in hygienic matrix piping systems
- Product routing where multiple lines/tanks share manifolds
- High-safety points in dairy, beverage and food processing
- Aseptic areas (with aseptic execution and documentation)
- Tank outlet, CIP return/divert and special layouts
Key benefits
Built for safe flow management, minimized cross-contamination risk, and reliable hygienic performance.
Leakage detection concept
Leakage chamber helps detect seal wear early and prevents unseen cross-contamination.
Leakage ChamberDetection
Cleanability upgrades
Options for improved cleanability and chamber cleaning where hygiene demands are higher.
CleanabilitySeat / Chamber Cleaning
Flexible configuration
Modular components allow configuration for process needs: manifolds, tank outlet, CIP, special layouts.
ModularMany Variants
Reduced spillage / efficient operation
Optimized geometry and operation reduce product loss during switching and support stable processes.
EfficiencyLess Loss
Automation-ready
Suitable for automated plants with sensing/control units, feedback, and remote operation.
AutomationFeedback
Models & complete range
Aseptic Mixproof
Double block-and-bleed mixproof design for hygienic and aseptic processes requiring contaminant-free execution.
AsepticHermetic Options
Valve Manifold
Manifold arrangements for matrix piping intersections — compact footprint, reduced dead space and service access options.
ManifoldMatrix Piping
Unique Mixproof
Versatile mixproof valve for safe routing at intersection points, with configurable cleanability and process protection options.
General DutyConfigurable
Unique Mixproof UltraPure
Execution intended for higher purity demands — used where stricter hygienic control and documentation are required.
UltraPureHigh Hygiene
Large Particle Valve (LP)
Designed for products with larger particles — supports safe routing while helping protect product integrity.
Large ParticleLP
Large Particle Valve (LP-F)
Large particle execution with an alternative flow arrangement — selected based on process and product behavior.
Large ParticleLP-F
Mixproof Tank Outlet
Tank outlet execution optimized for discharge points, drainability, and hygienic tank connection constraints.
Tank OutletDrainability
Mixproof Process
Process-focused execution for continuous flow management and safe operation in hygienic production lines.
ProcessContinuous
Mixproof Horizontal Tank
Execution adapted to horizontal tank layouts and installation geometry, often used in compact hygienic skids.
Horizontal TankLayout
Mixproof CIP
Designed for CIP-related routing and duty points, supporting hygienic cleaning circuits and switching logic.
CIPCleaning Circuits
Ordering leaflet
Ordering reference for configurations, options, and selection logic. Useful for procurement and standardization.
OrderingReference
Tank Outlet Accessories
Accessories for tank outlet execution — installation kits, geometry add-ons, and service-friendly options.
AccessoriesTank Outlet
Mixproof Accessories
Accessories and option kits for actuation, feedback, cleaning features, and service parts depending on execution.
OptionsServiceFeedback
Quick comparison
A fast overview to help selection before final configuration and quotation.
| Variant | Best for | Key advantages | Common options |
|---|---|---|---|
| Unique Mixproof | General mixproof duty at intersection points | Safe routing, leakage detection concept, modular options | Cleanability packages, feedback/control, connection standards |
| Aseptic Mixproof | Aseptic zones and sensitive processes | Contaminant control concept, aseptic-ready execution | Seat lift, sensors, documentation and aseptic options |
| UltraPure | Higher purity requirements | Stricter hygienic control approach | Documentation pack, sealing selections, finish requirements |
| LP / LP-F | Products with larger particles | Supports product-friendly routing for particle products | Flow arrangement selection, cleaning options |
| Tank Outlet / Horizontal Tank | Tank discharge geometries & special layouts | Installation-optimized for tank constraints | Accessories, installation kits, actuator/feedback |
| CIP variant | CIP routing and cleaning circuits | Supports switching logic in hygienic cleaning | Connection type, automation, cleaning packages |
| Valve Manifold | Matrix piping blocks / multi-valve stations | Compact footprint, reduced dead space (design-dependent) | Frames, service access, internal air distribution (if required) |
* Final selection depends on pressure/temperature, product properties, cleaning regime (CIP/SIP/aseptic), piping logic, and site standards.
Selection checklist
Send the following to receive the correct valve size, configuration, connections and sealing recommendation.
Process data
- Media / product type (including particle size if applicable)
- Process temperature range and CIP/SIP temperatures
- Operating pressure (normal + pressure peaks / water hammer risk)
- Piping logic: intersection point details (which lines must be separated)
- Flow direction and installation constraints
Build & options
- Variant needed: Process / CIP / Tank Outlet / Horizontal Tank / Aseptic / UltraPure / LP / LP-F
- Connection standard and line interface (weld / clamp / site standard)
- Seal and elastomer preference based on chemical and temperature compatibility
- Automation: feedback/control head, sensing, remote operation logic
- Documentation requirements (hygienic / aseptic packs if required)
Need a fast recommendation?
Send your piping logic (which lines must never mix), line size/connection, pressure & temperature, product type (and particle size if any), and whether aseptic execution is required. We’ll propose the best mixproof valve variant and options.
FAQ
Quick answers to common mixproof selection questions.
What does “double block-and-bleed” mean in a mixproof valve?
It means the valve has two independent seals and an intermediate leakage chamber. This creates a safety zone that helps prevent cross-contamination and enables leakage detection.
When should I choose LP / LP-F (large particle variants)?
Choose large particle variants when product contains larger inclusions and you need routing at intersection points while protecting product integrity. Selection depends on particle size, viscosity, and piping layout.
What is the difference between “Process”, “CIP”, and “Tank Outlet” executions?
These executions are optimized for different duty points: process flow management, CIP routing/cleaning circuits, and tank discharge geometries. The best choice depends on drainability needs, installation constraints and piping logic.
What info is needed for an accurate quotation?
Line size/connection standard, pressure and temperature, product/media details (including particles), required variant (process/CIP/tank outlet/aseptic), and automation/feedback requirements.
Request a quotation & technical support
Share your process details and we’ll propose the correct mixproof valve configuration.
We configure the right mixproof valve for your matrix piping.
Send piping logic, line size/connection, pressure & temperature, product details (and particle size), plus any aseptic/UltraPure requirements. We’ll respond with a clear technical proposal.