Mixproof valves
Two media in one valve — with no risk of mixing. The new D4 series plus the proven DE3, DA3+, DKR2 and SD4.
REF · MIXPROOF
Safe separation of media
Two independent seals with a leakage chamber between them. If a seal wears, product escapes to the outside — never into the other line.
- Resistant to water hammer.
- Leakage chamber cleaned during CIP.
- Valve manifolds for flexible production.
Why Mixproof valves
Low life-cycle cost
The same seal kit across several sizes (D4).
Lower CIP losses
Low consumption of cleaning agents and air.
Fully balanced
Prevents hydraulic lock and withstands pressure shocks.
Service without air
Dismantling and service without compressed air.
Manifolds
Long body connections make manifold building easier.
Control
Control units and fieldbus communication.
Models
Model choice depends on hygiene requirements and the cleaning method.
D4
The new generation of mixproof. One seal kit for DN 40–65 and DN 80–100, integrated stem seal flushing.
DN 40 – DN 100
DA3+
Ultra-hygienic with seat lift — the chamber is cleaned without extra spraying.
DN 40 – DN 150
DE3
Economical alternative to DA3+ when seat lift is not needed. Also as DEU3 and DET3.
DN 40 – DN 150
DKR2
Double-seat ball valve with full bore. DKRH2 and DKRT2 variants.
DN 25 – DN 125
SD4
Double-seal valve: shut-off, changeover or tank outlet. SDMS4 aseptic version.
DN 25 – DN 100
Specifications
Limits for the whole range. Exact figures for a specific unit are given in the selection sheet.
| Sizes | DN 25 – DN 150 (by model) |
|---|---|
| Product-contact parts | AISI 316L / 1.4404 |
| Seals | EPDM, HNBR, FPM, VMQ (by model) |
| Certificates | EHEDG; ATEX-compliant models |
Where it works
More valves
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KHV / KHI ball valves
Economical shut-off valves for utilities — steam, glycol, water — and CIP areas.
CPV constant pressure valves
A diaphragm valve that keeps product pressure constant — in separation, pasteurisation, UHT plants and fillers.
RUF3 / VPN check valves
Stop product flowing back in production lines.
Documentation
Can't find the document you need? We will send it — just ask.
Not sure which model to choose?
Tell us the medium and operating conditions — an engineer will select the unit and send a quotation with a selection sheet.