Airstone Combined Refrigerated Air Dryer | All-in-One Compressed Air Purification System

1. Product Overview

Airstone combined refrigerated air dryer is a multi-functional industrial air purification solution, replacing traditional discrete dryers, filters and oil removers. It is factory pre-assembled into one compact unit, integrating drying system, four-stage precision filtration, dedicated oil removal device and automatic drainage system.

Adopting low-temperature condensation drying and graded precision filtration, it delivers stable 2–5°C pressure dew point clean air. It removes moisture, oil mist and particles thoroughly, avoiding pneumatic faults and production defects, ideal for standardized, energy-saving and space-saving industrial air stations.

2. Working Principle

The unit applies a two-step progressive purification: bulk water and oil removal via refrigeration drying first, followed by fine oil and dust purification, delivering higher efficiency and lower filter load than split systems.

2.1 Refrigeration & Condensation Drying Stage

Hot humid compressed air is pre-cooled via heat exchanger for energy saving, then chilled to 2–5°C in the evaporator. Water vapor and emulsified oil fully condense and separate.

The integrated air-water-oil separator removes over 95% of liquid water and heavy oil via automatic drainage. Cold dry air is reheated to prevent pipeline condensation, stabilizing air quality and extending filter service life.

2.2 Four-stage Filtration & Deep Oil Removal Stage

Dried air undergoes gradient fine purification for ultra-clean output:

Step 1 — Independent Oil Remover: Eliminates high-concentration oil mist and emulsified oil, preventing filter saturation under heavy-oil conditions.

Step 2 — Primary Pre-filter: Blocks large particles, rust and bulk water to protect precision filter elements.

Step 3 — Secondary Water Separator: Captures micro mist and residual moisture for full dryness.

Step 4 — Tertiary Precision Oil Filter: Adsorbs fine oil mist to minimize residual oil content.

Step 5 — Final Ultra-precision Post-filter: Removes micron dust and gaseous oil vapor, deliveringdry, oil-free and particle-free compressed air.

3. Core Competitive Advantages

3.1 All-in-One Integrated Structure — Save Space, Time & Cost

3.2 Five-stage Hybrid Purification — Superior Air Quality

3.3 Ultra-low Pressure Drop — Energy Saving & Cost Effective

Optimized short integrated piping minimizes pressure loss, avoiding frequent compressor boosting and reducing power consumption. Pre-drying lowers filter load andextends filter service life by over 50%, cutting long-term maintenance costs.

3.4 Low Maintenance & High Operational Stability

Centralized external filters and drain valves enable fast one-person maintenance without pipe disassembly. Reinforced steel base reduces vibration, and standardized factory assembly ensures zero air leakage and reliable 24/7 continuous operation.

3.5 Visual Monitoring — Easy Factory Management

Built-in pressure gauges, temperature indicators and operation lights realize real-time status monitoring, enabling fast fault judgment and standardized air station management.

4. Product Summary

This model  thoroughly solves compressed air oil contamination troubles. Its multi-stage purification system restricts residual oil to ≤0.001 ppm, meeting ISO 8573 Class 1 air standards. Compatible with 8–16 bar laser cutting equipment from 1000W to 12000W, it protects laser lenses and nozzles, optimizes cutting finish, and greatly reduces maintenance & consumable costs.

5. Technical datas