1. Scope of Common Small Hydraulic Parts

This solution is applicable to all precision small hydraulic parts, including but not limited to:

• Hydraulic spools, valve sleeves, valve plates, throttle plates and small pressure regulating parts

• Small hydraulic fittings, ferrules, sealing compression parts and lock nuts

• Precision pump core components such as plungers, slippers and valve plates

• Micro valve blocks, small oil circuit plates, sensor bases and precision hydraulic castings

2. Core Cleaning Pain Points of Small Hydraulic Parts (Common Industrial Problems)

Small hydraulic parts feature compact size but extremely high cleanliness requirements. Contamination on such parts is the leading cause of complete machine jamming, oil leakage, abnormal noise and insufficient service life:

• Abundant micro holes, fine grooves and gaps: 0.5–3mm tiny oil passages, counterbore holes and thread grooves are highly susceptible to chip accumulation

• Complex contamination composition: Residues include iron chips, aluminum chips, grinding powder, polishing dust, cutting oil, anti-rust oil, die-casting release agents and wax mixtures

• Limited cleaning effect of manual operation and ordinary water washing: Workpieces appear clean on the surface, while residual chips inside holes exceed the standard

• High risk of secondary pollution: Water washing easily causes water stains, oxidative whitening, air-drying marks and residual water spots

• High post-assembly operational risks: Micro debris will trigger spool stagnation, unstable pressure relief, pump wear, system abnormal noise and service life degradation

3. Standard Cleaning Solution for Mass Production of Small Hydraulic Parts (General Version)

Applicable Scenarios

Suitable for construction machinery hydraulics, new energy hydraulic components, servo hydraulic parts, precision pump and valve small parts, export-grade hydraulic products, and components that meet VDA19 / ISO18413 / NAS cleanliness grading standards.

Recommended Equipment

Fully automatic vacuum hydrocarbon ultrasonic cleaning machine (3～5 tanks)

Targeting the structural characteristics of small hydraulic parts with numerous fine holes, blind holes and gaps that trap stubborn residual chips, the solution adopts a complete closed-loop process consisting of vacuum negative pressure penetration, ultrasonic peeling, steam rinsing and vacuum drying.

Standard Process Flow (Dedicated for Small Parts)

• Vacuum Rough Washing: Negative pressure dredges micro-pores to remove heavy cutting oil, dust, wax and large iron and aluminum chips.

• Vacuum Degassed Ultrasonic Precision Cleaning: Micro-hole resonance strips micron-scale grinding powder and embedded fine chips, thoroughly eliminating hidden dirt in holes.

• Steam Spray Rinsing: Omni-directionally replaces residual oil and chips to avoid secondary pollution.

• Solvent Distillation Regeneration: Real-time solvent purification ensures stable cleaning effect and prevents workpiece re-contamination by dirty cleaning fluid.

• Low-temperature Vacuum Drying: Full oxygen-free drying process achieves zero water stains, zero water marks and zero oxidative whitening.

4. Core Advantages of the Solution (for Small Hydraulic Parts)

• Thorough cleaning of small and deep holes: Vacuum penetration can clean 0.3mm-level ultra-fine oil passages and completely remove accumulated chips at hole bottoms.

• High cleanliness consistency: No quality fluctuation in batch production, stably meeting high-end hydraulic assembly standards.

• Rust and discoloration resistance: The fully enclosed oxygen-free low-temperature process is applicable to aluminum, steel and cast iron parts.

• No residue or water marks, no secondary wiping required: Cleaned workpieces can be directly assembled.

• Solvent recycling rate ≥ 98%: Low operating cost, ideal for large-scale mass production.

• Explosion-proof, low VOC and environmentally compliant: Fully in line with factory environmental assessment and safety production specifications.