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LENJEX industrial ultrasonic cleaning equipment
Hydraulic components in a cleaning basket

LENJEX Industrial Cleaning

Hydraulic & Pneumatic Components Ultrasonic Cleaning

Removes machining oil, particles and burrs from valve, pump and actuator parts, including internal passages.

Why Ultrasonic

Ultrasonic cleaning for Hydraulic & Pneumatic

Hydraulic and pneumatic components depend on clean internal passages, because particles and residual oil cause valve sticking, wear and performance failures. Ultrasonic cavitation reaches cross-drilled holes, spools, housings and internal features to flush contamination.

The process is commonly run with precision cleanliness control and filtration. A multi-tank system or clean-rinse-dry system suits production, with vacuum cleaning for hard-to-dry assembled parts.

Particle limits and drying are defined early because the components are highly sensitive to contamination.

Machined valve and pump parts
  • Flushes cross-drilled holes and internal passages
  • Removes particles that cause valve failures
  • Filtration prevents redeposition
  • Integrated drying for precision assembly
  • Repeatable cleanliness for production

Typical Workpieces

Parts in this application

  • Valve bodies and spools
  • Pump housings and gear parts
  • Cylinders and actuator components
  • Fittings and manifolds
  • Hydraulic blocks
  • Pneumatic valves and bodies

Contamination

Soils to evaluate

  • Machining and cutting oils
  • Metal chips and fines
  • Burrs and particles
  • Hydraulic oil residues
  • Preservative oils
  • Foundry and casting residues
Metal basket for hydraulic parts

Cleanliness Target

Define clean before choosing equipment

Acceptance is based on particle counts or gravimetric cleanliness linked to the component function.

Drying must be complete in passages and cavities before assembly.

Recommended Sequence

A process route for evaluation

The final sequence depends on soil loading, material, rinse quality and drying behavior.

  1. Step 1Pre-flush to remove chips and loose oil
  2. Step 2Ultrasonic wash with filtration
  3. Step 3Rinse internal passages
  4. Step 4Hot-air or vacuum dry
  5. VerifyCheck particle cleanliness

Recommended Equipment

Systems to compare

The final specification follows process testing and production analysis.

Process Controls

Control the variables that change the cleaning result

Confirm the part, soil, loading and final handling before fixing equipment settings.

Control 01

Material and geometry

Record surfaces, cavities and features that can trap air or liquid.

Control 02

Soil condition

Test the heaviest representative contamination, not an ideal sample.

Control 03

Basket loading

Keep acoustic access and part spacing consistent with production.

Control 04

Rinse and drying

Match downstream handling to residue and corrosion risks.

System Selection

Match the cleaning route to production flow

Stage count and automation follow the validated process and required output.

Batch

Single-tank route

Compare for focused washing where rinsing and drying are managed separately.

Multi-stage

Wash, rinse and dry

Add controlled stages when carryover and final condition matter.

Automatic

Repeatable transfer

Evaluate automation when output, handling or recipe control requires it.

Acceptance

Define how the cleaned part will be checked

Use the same practical inspection method for trial samples and production parts.

  • Agree the surface or residue limit
  • Check hidden and difficult features
  • Record rinse, drying and handling conditions
  • Compare results before the next operation

Representative Trial

Confirm the process with real parts and loads

Trial evidence should cover normal production and the most difficult expected condition.

  1. DescribePart, material and contamination.
  2. LoadUse realistic spacing and orientation.
  3. TestRecord chemistry, time and temperature.
  4. VerifyInspect with the agreed method.
Plan a cleaning trialSend project details

Application Questions

Planning the cleaning study

Related Applications

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