Coolant Distribution Unit (CDUs)

Bürkert provides the fluid control and monitoring layer, with angle-seat and control valves for isolating CDUs, modulating bypass lines, balancing distribution branches, and switching between primary and secondary circuits. Flowmeters (including low–pressure-loss options such as FLOWave) plus pressure, temperature, and conductivity sensors provide the real-time data needed to verify branch flows, protect equipment from overpressure or low-flow conditions, and integrate CDU operation into the overall BMS/DCIM strategy for safe, efficient, and scalable data center cooling.

Flow Measurement

Insertion Magmenter Type 8041 & 8045, Full Bore Electromagnetic Type 8059, FLOWave Type 8098

Electromagnetic Insertion flowmeter

Type 8041

• Sensor without moving parts
• Flowmeter with 2-point control function
• Application-specific calibration via teach-in functionality
• Clean in place (CIP) compatible
• FDA-compliant materials

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Electromagnetic Insertion flowmeter

Type 8045

• Sensor without moving parts
• Indicates volume flow rate as well as volume
• Simulation of all output signals
• Clean in place (CIP) compatible, FDA-compliant materials
• Variant with electrodes made of alloy C22

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FLOWave SAW flowmeter

Type 8098

• No obstacles inside the measuring tube, compact, lightweight and low energy consumption
• Conforms to hygienic requirements, CIP/SIP compatible
• Ideal for liquids with low or no conductivity, for example water for injection (WFI)
• Digital communication (Bürkert system bus (büS)/CANopen, industrial communication over Modbus TCP, PROFINET, EtherNet/IP, EtherCAT® or IO-Link), parameterisation via Communicator, display
• Optional: ATEX/IECEx (II 3G/D), ATEX/IECEx/NEPSI or hazardous locations (HazLoc) certifications

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Adding a Bürkert flowmeter such as the Type 8045 or Type 8098 FLOWave to a coolant distribution unit gives data center operators real-time visibility into coolant flow rates across every server rack circuit, enabling early detection of blockages, pump degradation, or flow imbalances before they can trigger a thermal event. With no internal moving parts, integrated digital communication via PROFINET, EtherNet/IP, or IO-Link for fast integration into modern digital infrastructures and easy installation into existing pipework, both devices deliver continuous, low-maintenance flow data that feeds directly into BMS or DCIM platforms to optimize cooling efficiency and support PUE improvements.

Flow Measurement

Conductivity Probe Type 8222 & Type 8228 with Programming Module 559168

Conductivity meter, ELEMENT design

Type 8222

• Perfect for clean water and slightly concentrated liquids
• Compact measuring device for direct connection to the control level (PLC) via analogue 4…20 mA signal or digital IO-Link or Bürkert system bus (büS)/CANopen communication
• Parametrisation, calibration and transfer of parametrisation data all possible thanks to a removable display/configuration module
• Simulation of process values for diagnostics
• Universal process connection, three different cell constants to cover a wide range of applications such as reverse osmosis

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Inductive conductivity meter, ELEMENT Design

Type 8228

• Perfect for concentrated liquids and wide conductivity ranges
• Pre-parameterized variants available for direct start-up
• Measuring device for direct connection to the control level (PLC) via analogue 4…20 mA signal or digital IO-Link or Bürkert system bus (büS)/CANopen communication
• Simulation of process values for diagnostics
• Variants of the sensor available in PP, PVDF or PEEK

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Monitoring coolant conductivity is essential for protecting expensive IT infrastructure — rising conductivity signals corrosive or scaling coolant, degraded inhibitors, or cross-contamination events that can damage pumps, heat exchangers, and server cold plates before visible symptoms appear. In direct liquid cooling applications, it also provides a critical electrical safety check, ensuring coolant purity remains within the limits specified by server and CDU manufacturers to prevent leakage currents and maintain equipment warranty compliance.

Reservoir / Drain & Fill Valves

Solenoid Valves Type 6013, 6213, 7011, 0290 & 5282

Direct-acting 2/2-way plunger valve

Type 6013

• Direct-acting and compact valve up to DN 6.0
• Vibration-proof, bolted coil system
• Explosion-proof variants
• Energy-saving 'Kick and Drop' models available

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Servo-assisted 2/2-way diaphragm valve

Type 6213

• Servo-assisted diaphragm valve with nominal diameter of up to DN 40
• Spring coupled diaphragm opens without differential pressure
• Damped design for low noise
• High flow rate with compact design
• Energy-saving double coil technology with kick and drop variant

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Direct-acting 2/2-way plunger valve

Type 7011

• Direct-acting and compact small valve up to DN 2.4
• Slipped over coil system
• Simple and fast flange or manifold mounting
• Quick coupling (push-in fitting) for push-in connectors
• Explosion-proof variants

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Servo-assisted 2/2-way diaphragm valve

Type 0290

• Servo-assisted diaphragm valve up to DN 50
• Fix-coupled diaphragm opens without differential pressure
• Vibration-proof, block screwed coil system
• Energy-saving power reduction for all DC variants

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Servo-assisted 2/2-way diaphragm valve

Type 5282

• Servo-assisted diaphragm valve up to DN 65 orifice
• Separating diaphragm for aggressive and contaminated media
• Closing and opening times can be adjusted individually
• Explosion-proof variants (Cat. 2)
• Service-friendly manual override

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Bürkert solenoid valves — including the Types 6013, 6213, 5282, 290, and 7011 — cover everything from compact direct-acting to high-flow servo-assisted applications, offering an unmatched breadth of body materials, seal combinations, and industry certifications within a single cohesive product family. Energy-saving 'Kick and Drop' electronics, superior leak-tightness, flexible NC/NO configuration, and over 70 years of engineering expertise make Bürkert the reliable, versatile choice across virtually any fluid control application.

Reservoir pH

ORP Electrode for Type 8000 series

pH Electrode for 8000 series
 

Measuring pH in a CDU ensures coolant chemistry stays within the narrow neutral range required to prevent corrosion of dissimilar metals — such as copper, aluminum, and stainless steel — that are commonly found together in server cold plates, heat exchangers, and pipework, where even slight acidity or alkalinity can accelerate galvanic attack and lead to costly leaks or equipment failure.

Level Switch / Measurement

Tuning Fork Type 8110 & Type 8111, Radar Filling Level Meter Type 8131

Vibrating level switch

Type 8110

• For universal applications such as limit level detection or run-dry protection
• Installation without adjustment
• Minimal installation dimensions
• Available in IO-Link variant

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Vibrating filling level switch

Type 8111

• For universal applications such as filling level detection or dry run protection system
• Installation without adjustment
• Ideal for the food, beverage and pharmaceutical industry with a surface roughness < 0.8 μm
• ATEX approvals

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Radar level measuring device for liquids and bulk materials

Type 8131

• Suitable for simple applications, such as water treatment, storage tanks and small silos
• Continuous filling level measurement up to 20 m, 4...20 mA, 2-wire
• Available process connections: thread (G, NPT, R 1½")
• Excellent radar signal focusing and high measurement dynamics
• Adjustable via Bluetooth

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Type 8110 and 8111 tuning fork level switches protect CDU coolant reservoirs from pump dry-run damage and overflow with highly reliable high/low alarms unaffected by foam or turbulence, while the Type 8131 continuous radar level transmitter adds real-time level monitoring and automated top-up control — all integrating seamlessly into BMS or DCIM platforms to safeguard uptime and eliminate manual checks.

Negative Pressure CDU Solutions

Vacuum Generating Valves

Type 2100 ELEMENT Angle Seat Valves

Pneumatically operated 2/2-way angle seat valve ELEMENT for decentralized automation

Type 2100

• High flow rates
• Long service life
• Easy integration of automation units with ELEMENT
• Flow-optimised stainless steel valve body with sleeve, clamp or weld connection
• Suitable for steam

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Motorized Angle Valves

Type 3320 Electromotive angle seat valve

Electromotive 2/2 way angle seat valve (on/off)

Type 3320

• Safety position via energy storage
• Rapid flow shut off
• Weather and impact resistant design
• Hygienically designed surface
• Versatile diagnostic options

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The Bürkert Type 2100 angle seat valve's vacuum-rated design handles negative pressures down to -0.9 bar(g), making it ideal for maintaining the sub-atmospheric conditions in negative-pressure CDUs that prevent cavitation, dissolved gas formation, and pump damage — available in both pneumatic and motorized electric versions to suit data centers where compressed air infrastructure may not be present. With leak-tight V-seal packing and full ELEMENT automation compatibility, both variants deliver reliable, monitored control with seamless BMS or DCIM integration in close proximity to live IT equipment.