Complete air system layout for spray painting factory, match air receiver tank and refrigerated dryer, with 3-stage filter configuration to remove water, oil and dust, avoid paint film whitening, pinholes and fish eyes.

How to Match Refrigerated Dryer & Air Receiver Tank for Dry Clean Air in Painting Workshop

Water vapor, oil mist and dust inside compressed air will cause paint defects like whitening, pinholes, fish eyes and peeling during spray coating. The raw air discharged directly from screw air compressor is high temperature and humid, not suitable for painting. A standard painting air system must be equipped with air receiver tank, refrigerated air dryer and precision filters. The air tank stabilizes pressure and removes bulk liquid water; the dryer deeply eliminates water vapor to achieve dry clean air for spray guns.

I. Air Receiver Tank: Stabilize Pressure & Pre-Separate Water

Core Functions

1. Constant air pressure: Avoid pressure fluctuation when compressor loads/unloads, ensure uniform paint thickness without color difference.

2. Pre-cool & drain condensate: Hot compressed air slows down inside tank, most water vapor condenses into liquid and drains via auto drain valve, reduce dryer working load.

Selection Rule

Tank volume (L) = Air compressor flow rate (m³/min) × 0.6~1. Double volume for multi-spray-gun production line.

Installation Tips

Install air tank right after compressor outlet, all dryers & filters behind the tank. Equip auto drain valve at tank bottom, place tank in cool & ventilated area.

II. Refrigerated Compressed Air Dryer: Deep Dew Point Control

Air receiver only removes liquid water, invisible gaseous moisture must be treated by refrigerated dryer. It cools air to 2~5℃ pressure dew point to condense all vapor, no water condensation inside pipeline or spray gun.

Selection Standard

Dryer processing capacity ≥ compressor flow rate, add 10%~20% extra margin for multi-workshop continuous spraying.

Installation Sequence

Air Tank → Primary Filter → Refrigerated Dryer → Fine Filter → Activated Carbon Filter → Spray Booth

III. 3-Stage Filtration Matching (Must-Have for Painting)

1. Q Pre-filter: Block large dust, liquid water & bulk oil, protect dryer core.

2. P Fine Filter: Remove fine oil mist, residual oil ≤0.1ppm.

3. C Activated Carbon Filter: Absorb gaseous oil vapor, residual oil ≤0.001ppm, eliminate paint fish eyes.

IV. Standard Full Air System Layout

Screw Air Compressor → Air Receiver Tank (Auto Drain) → Q Coarse Filter → Refrigerated Dryer → P Precision Filter → C Carbon Filter → Spray Gun Pipeline

V. Daily Maintenance Tips

• Check auto drain valves of tank & dryer daily to prevent water backflow.

• Replace filter elements every 2000 working hours.

• Clean dryer cooling radiator regularly to keep stable dew point.

• Use anti-rust aluminum/stainless air pipeline to avoid rust impurities.

VI. Inquiry Guide

We provide one-stop air system solution for painting workshops, customized air receiver tank, refrigerated dryer and filter kits matched with our VSD screw compressors. Send us your compressor model and number of spray guns for competitive package price.