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D4 / DA4 Series - Double Seat Mixproof Valves
Product Specifications
Housing Combinations
Shut-off Valves
Mixproof shut-off valves are used to keep incompatible products from mixing at pipe junctions, or to simply shut flow from an upper to lower line within a valve matrix.

Divert Valves
Mixproof divert valves are used for distributing liquid from one pipeline into two others (or vice versa)

Control Units
CU4 & CU4plus Series - Benefits
- Automated control and position monitoring for reliable processing
- Reduces compressed air and electrical connections
- Helps reduce external solenoid valve cabinets
- Accelerates valve response time
- Innovative seat lift detection is fully integrated without need for external sensor wiring to provide additional position monitoring
- Reliability and long service life - robust clamp connection, reinforced stainless steel air coupling threads to avoid air leakages, and water tight seals
- Ease of operation - contains manual override solenoids and adjustment screw to throttle air flow to actuator to ensure optimal opening and closing
- Clarity - clear and bright indication of valve position - 5 diodes in LED panel and convenient location
- Standardization - same control top used on various SPX FLOW valve lines, offers common look and controls interface
- Robust design suited for NEMA6/IP67/IP69k* wash-down rating
- ATEX / IECEx rated environments
CONNECTOR OPTIONS S/O Cord Grip for hard wire (std) M12 4-pin connector (optional) |
POSITION INDICATION CU4: 2 internal feedback sensors for valve open/valve closed position detection |
INTERFACE OPTIONS 24V DC Direct Connect AS-i Field Bus Card IO-Link |
SOLENOID VALVES 24V DC Select 1 (non seat lift) or 3 Solenoids (seat lift) |
*IP69K compliance achieved by modification of the exhaust
8681 Control Unit - Benefits
- Contact free position sensor including (3) programmable feedback signals
- Positions easily taught via intuitive push buttons or Autotune feature to ensure quick & easy set-up
- Ultra-bright 360° visual LED position indication with adjustable red, yellow, & green color assignments provide clarity from all points of view and avoid confusion
- Manual override and air throttle adjustable solenoids to assist start-up, maintenance, and troubleshooting
- Up to IP69K washdown rating available (IP65/67 as standard) for high washdown environments
- Built-in microcontroller tracks cycles and alerts operator when preventive maintenance is required
- Simple and robust stainless steel adapter & chemically resistant polycarbonate head
- Supplied by industry leading Burkert Fluid Controls
CONNECTOR OPTIONS Quick Disconnect Pin Connector |
POSITION INDICATION (3) programmable position sensors in control top |
INTERFACE OPTIONS AS-i Field Bus Card DeviceNet™ Field Bus Network Card |
SOLENOID VALVES 24V DC Manual override and air throttle adjustment Up to (3) available in control top |
- Max. line pressure 10 bar
- Max. operating temperature 135 °C
- Short-term load 140 °C