ESML
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Product pageFlow-channel cleaning

Cold Plate / Water Cooling Plate Cleaning Equipment

Integrated flush–air-blow–vacuum-dry–cool equipment for serpentine flow channels and blind holes in cold plates (water/liquid cooling plates), removing chips, micron particles and oil via multi-stage filtered media recirculation, with ISO 16232 / VDA 19.1 particle cleanliness assessment

Cold plates (water/liquid cooling plates) contain narrow serpentine channels and blind holes where metal chips, micron particles and oil remain after machining, causing blockage and cooling degradation. ESML cold plate cleaning equipment uses targeted flushing designed around the channel geometry, with cleaning media recirculated through multi-stage filtration to trap particles; clean–air-blow–vacuum-dry–cool runs in one line with residual particle size referenced at ≤ 200 μm and cleanliness assessed per ISO 16232 / VDA 19.1 (particle size distribution and residual contaminant mass), with programmable 30–180 s cycle times. The line uses manual loading/unloading with automatic tray transfer (configured per project) and has been deployed at a leading domestic thermal management Tier 1 supplier for cold plate / manifold cleaning.

≤ 200μmPARTICLE SIZE

Cold plate flow-channel cleaning · process blueprint

What is cold plate cleaning equipment?

Cold plate cleaning equipment is a precision cleaning system for flow-channel components such as cold plates, water cooling plates and manifolds. It removes metal chips, micron particles and oil from internal channels through targeted flushing with multi-stage filtered media recirculation, with cleanliness assessed per ISO 16232 / VDA 19.1 after cleaning.

01PROCESS WINDOW

Cold Plate Flow-Channel Cleaning Process Window

Flushing pressure, flow and media filtration precision are set by the channel structure and contaminant type; trays transfer automatically inside the line to minimize recontamination from manual handling.
  1. 01

    Workpiece Locating

    • Operator loads the cold plate onto the fixture/tray; connections dock automatically and channels/blind holes are fixed in orientation
  2. 02

    Channel Flushing

    • Targeted nozzles flush serpentine channels and blind holes, removing metal chips, micron particles and oil
  3. 03

    Air Blow

    • Compressed air blows most residual liquid out of the channels, shortening subsequent drying
  4. 04

    Vacuum Drying & Cooling

    • Hot-air drying with vacuum applied to accelerate drying leaves no residual liquid even in blind holes, then cooling to ambient before unloading
02CAPABILITIES

Cold Plate Cleaning Capabilities

Targeted Channel Flushing

Nozzle layout, pressure and flow customized to the channel geometry

Particle Cleanliness Control

Residual particles referenced at ≤ 200 μm; ISO 16232 / VDA 19.1 assessment

Integrated Process

Flush–air-blow–vacuum-dry–cool with automatic tray transfer in one line

Per-piece Traceability

Per-piece UID logs process parameters and cleanliness results, MES-ready

03WORKPIECES

Suitable Workpieces

Built on the delivered cold plate / manifold cleaning line; similar components with internal flow channels can be adapted by geometry.

Cold Plate / Water Cooling Plate

Chip and particle cleaning for serpentine channels and blind holes; delivered to a leading domestic Tier 1 line

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Manifold

Targeted flushing of multi-branch distribution channels; particle and oil control at ports and inner walls

Coolant Lines / Quick Disconnects

Internal flushing, air blow and vacuum drying for long lines and connectors

Oil Cooler

Stacked-plate/fin channel cleaning; locating fixtures and nozzles customized per workpiece

SPEC

Cold Plate Cleaning Selection Parameters

Reference selection parameters for cold plate / water cooling plate cleaning equipment; the final solution is tuned to plate size, channel geometry and cleanliness class.

Cold Plate Cleaning Selection Parameters
MetricValue
Residual Particle Size≤ 200 μm
Cleanliness StandardISO 16232 / VDA 19.1
Cycle Time Range30 – 180 s
Loading / UnloadingManual load/unload + tray transfer
Cleaning MediaPure water / DI water / Hydrocarbon
Drying MethodHot air + Vacuum
Process Traceability100% · Per-piece UID
CommunicationProfinet / OPC UA
05REFERENCE CASE

Reference Project

Integrated cold plate / manifold flow-channel cleaning line, delivered and validated on the customer's site.
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Integrated Thermal Flow-Channel Cleaning Line
2026Leading Domestic Thermal Management Tier 1

Integrated Thermal Flow-Channel Cleaning Line

Challenge
Delivered an integrated flow-channel cleaning system covering cleaning, drying, and cooling — meeting the cleanliness and cycle-time requirements of new-energy thermal management products.
Solution
  • Aqueous precision cleaning chamber
  • Multi-stage high-efficiency drying
  • Air / nitrogen cooling
Results
  • Clean → Dry → Cool (integrated)Process
  • Micron-level removalParticle control
  • Cold plates / Manifolds / HX / Liquid lines / Oil coolersWorkpieces
    • View case detail
    FAQ · 06

    Cold Plate Cleaning FAQ

    What contaminants does cold plate cleaning remove?
    After machining, cold plate serpentine channels and blind holes mainly carry metal chips, micron particles, oil and media residue. Targeted flushing with multi-stage filtered media recirculation removes chips and particles and controls oil and ionic residue, preventing channel blockage, cooling degradation and downstream particle contamination; cleanliness is assessed per ISO 16232 / VDA 19.1 after cleaning.
    How is cold plate cleanliness assessed? What does ≤200 μm mean?
    Per ISO 16232 / VDA 19.1, the extraction liquid after cleaning is analyzed by membrane filtration, reporting both particle size distribution (counts per size band) and residual contaminant mass. Our equipment is designed with a residual particle reference of ≤ 200 μm; the actual limits are defined by the OEM or Tier 1 in drawings or cleanliness specifications, and the equipment can be aligned with the customer's limits and inspection workflow.
    What is the cycle time of a cold plate cleaning machine?
    Cycle time ranges roughly 30–180 seconds per piece, programmed by plate size, channel complexity, cleanliness class and capacity target; it is calculated during solution design together with filtration precision, air blow and vacuum drying. Larger plates and longer channels extend the cycle accordingly.
    How does the cold plate cleaning line handle loading and unloading?
    The standard configuration is manual loading/unloading with automatic in-line tray transfer: after the operator places cold plates on trays or locating fixtures, trays move automatically through cleaning, air blow, vacuum drying and cooling, avoiding recontamination from handling, with no need for constant operator attendance. Loading and unloading are configured per customer solution and can be extended to interface with automated logistics.
    Does the equipment support traceability? What other workpieces can it clean?
    Yes — a per-piece UID records key process parameters such as flushing pressure, flow and temperature, plus cleanliness results, with full key-parameter history and Profinet / OPC UA protocols for MES/SCADA integration. Beyond cold/water cooling plates, the same platform adapts to manifolds, coolant lines and quick-disconnect components, and oil coolers — other components with internal flow channels.

    Updated · reviewed monthly

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