Standard Mixproof
Two-seat valve with leakage chamber for product/CIP separation in tank manifolds.
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Mixproof & Divert Valves
Mixproof and divert valve concepts for complex routing, product separation and automated sanitary process plants.
Divert and mixproof conceptsActuation and control head optionsProject-based review recommendedUseful for integrators and process contractors
Sizes & Dimensions
Standard mixproof valve sizes.
Double-seat configuration prevents mixing of two products through independent plug seals. Pneumatic actuation with seat-lift for CIP.
| Nominal | DN | OD (mm) | Cv (path) | Air conn. | Weight (kg) | Type |
|---|---|---|---|---|---|---|
| 2" | DN50 | 77.5 | 85 | ¼" NPT | 12 | Double-seat |
| 2½" | DN65 | 91.0 | 135 | ¼" NPT | 15 | Double-seat |
| 3" | DN80 | 104.0 | 220 | ¼" NPT | 19 | Double-seat |
| 4" | DN100 | 119.0 | 380 | ¼" NPT | 28 | Double-seat |
| 5" | DN125 | 130.0 | 580 | ¼" NPT | 38 | Double-seat |
| 6" | DN150 | 168.0 | 850 | ¼" NPT | 52 | Double-seat |
Operating Conditions
Pressure-temperature rating for mixproof valves.
Two independent plug seals with leakage chamber to atmosphere. Seal material determines operating range.
Service Conditions
- Max working pressure: 10 bar
- EPDM seals: –40°C to +140°C
- Viton seals: –20°C to +200°C
- Steam SIP: +135°C compatible
- Air supply: 5 – 7 bar clean dry air
- Leakage detection: Atmospheric drain visible
Actual ratings depend on size, material and operating conditions. Confirm via RFQ for project-specific requirements.
Standards & Compliance
Built to recognized sanitary and pressure standards.
Full documentation packages available including MTR, 3.1 certificates, surface roughness reports and pressure test records.
3-A 74-07
3-A Sanitary Standard
Sanitary equipment for milk and milk products processing.
EHEDG Class I
Mixproof Equipment
Hygienic mixproof valve class I certification.
ASME BPE
Bioprocessing Equipment
Surface finish, materials and design for pharma/biotech.
ISO 5211
Actuator Mounting
Standardized actuator mounting for automation.
FDA 21 CFR
FDA 21 CFR 177
Food contact materials compliance for seats and seals.
EC 1935/2004
Food Contact
EU regulation on food-contact materials.
ATEX
Hazardous Areas
Explosive atmosphere directive for actuators.
DIN 32676
Tri-Clamp Connections
Dimensional standard for tri-clamp fittings.
Product Variants
Mixproof Valve configurations for different process roles.
Multiple variants available to match your application requirements. Browse related products for complete process line coverage.
With Seat Lift
Pneumatic seat-lift for CIP cleaning of seat seal areas during automated wash cycles.
Request quote →Mixproof Tank Outlet
Tank-bottom mixproof for vessel outlets requiring product/CIP isolation.
Request quote →Manifold Block
Multi-valve manifold blocks with integrated mixproof valves for compact installations.
Request quote →Technical Datasheet
Download the product-specific RFQ datasheet.
This PDF summarizes typical sizes, materials, standards, application notes and RFQ inputs for Mixproof Valves. Use it as a preparation document before sending a quotation request.
Engineer / Contractor RFQ Support
Send this item as part of a project package, BOM or comparison quote.
For accurate sourcing, include size, connection type, material grade, finish, quantity, pressure/temperature conditions, certificates required and target delivery timing.
Technical RFQ Guide
Specification points to confirm before quotation.
These are typical sourcing fields. Final availability and compliance should be confirmed against the exact project requirement.
Valve function
Divert, mixproof or routing valve by requirement
Material
316L commonly requested
Connections
Clamp/weld and DIN/ISO/SMS options
Control
Pneumatic actuator and feedback/control head options
Seat/seal
Application-dependent elastomers
Documentation
Application review strongly recommended
Applications
Where this product is typically used.
Dairy processing plants
Relevant for sourcing discussions, project BOMs and maintenance replacement needs.
Beverage routing systems
Relevant for sourcing discussions, project BOMs and maintenance replacement needs.
CIP / product separation
Relevant for sourcing discussions, project BOMs and maintenance replacement needs.
Automated process manifolds
Relevant for sourcing discussions, project BOMs and maintenance replacement needs.
Related Products
Continue building the RFQ package.
Technical Product Layout
Mixproof & Divert Valves — technical sourcing profile
Structured for engineers, contractors and plant buyers who need a clear RFQ-ready technical view before requesting pricing.
Technical Overview
Mixproof and divert valve solutions for complex hygienic routing, separation of product streams and automated process changeover.
Applications
- Dairy routing matrices
- Beverage processing lines
- CIP/product separation
- Automated production skids
Material Grades
- Body: SS316L commonly requested
- Seals: EPDM / FKM / PTFE options
- Actuator: pneumatic control package
- Feedback / control top by project
Surface Finish
Sanitary polished internal contact surfaces; leakage chamber and cleanability requirements must be defined.
Standards
- 3-A oriented hygienic design discussion
- FDA-style elastomer options
- Automation and feedback standards by plant
- CIP/SIP compatibility discussion
Pressure / TemperatureDepends on valve model, seat lift design, actuator package and process temperature.
Connection TypesCommon RFQ connection formats are listed below. Final connection selection depends on plant standards and equipment interface.
Tri-ClampWeld endDIN / ISO / SMS style endsControl air / feedback connections
Related Products
Use these products to build a complete RFQ package around this item.
RFQ note: Values on this page are sourcing guidance only. Final model, pressure rating, temperature rating, certificates, elastomer compatibility and compliance must be confirmed against the exact supplier datasheet and project requirement.
Contractor & Plant Buyer RFQ
Need a contractor-ready quote package or BOM support?
Send line sizes, connection standards, material grade, finish, quantity, photos/drawings and required delivery timing. We help turn unclear product needs into a cleaner RFQ package for supplier comparison.
Engineering Documentation
Technical Datasheet Available
Download the product datasheet for technical specifications, dimensional references, material data, applicable standards and RFQ guidance. Suitable for procurement, engineering review and project documentation.
Common Questions
Frequently asked questions about mixproof valves.
Engineering and procurement questions we hear most often. For project-specific guidance, send your application details via RFQ.
What is a mixproof valve and why use it?
A mixproof valve has two independent plug seals with a leakage chamber between them. If one seal fails, leaked product flows to atmosphere rather than mixing with the other product.
Essential for tank outlets, manifolds and multi-product systems where cross-contamination must be physically prevented. Critical for dairy plants with multiple SKUs.
How does the leakage chamber work?
The chamber between two plug seals is vented to atmosphere via a drain port. Any seal failure results in product flowing to drain instead of contaminating the other line.
The drain must be visible and unobstructed during operation. Many installations connect the drain to a leakage detection sensor for automatic alarm.
What is seat-lift and why is it needed?
During CIP cycles, brief pneumatic lifting of each seat (1–2 seconds) exposes the seal contact area to CIP fluid for cleaning. Without seat-lift, the seal area cannot be cleaned.
Seat-lift is essential for ASME BPE and 3-A compliance in dairy and pharmaceutical applications. Standard for sanitary mixproof valves.
Are mixproof valves required for HACCP?
HACCP requires demonstration of contamination prevention. Mixproof valves are widely accepted as physical separation evidence for critical control points.
For allergen segregation in shared lines (e.g., dairy + non-dairy), mixproof valves provide auditable physical separation.
What is the difference from a single-seat sanitary valve?
Single-seat valves provide ONE barrier between products. A seal failure causes immediate mixing. Mixproof valves provide TWO independent barriers with leakage to drain.
For non-critical applications, single-seat is sufficient. For multi-product manifolds and tank outlets, mixproof is required.
How do I size mixproof valves?
Size based on flow rate, pressure drop and Cv requirements. Each path has independent Cv — calculate for the worst-case flow direction.
Provide flow rate (m³/h), inlet/outlet pressure, fluid viscosity and product compatibility. For dairy, oversize one step for cleanability.
What documentation is provided?
Standard: 3.1 MTR for body, FDA compliance for seals, pressure test certificate, EHEDG certification, seat-lift cycle test results.
For dairy QC audits, request 3-A symbol authorization. For pharmaceutical, request full BPE package including ferrite content and helium leak testing.