An air receiver tank sits between the compressor and the distribution network, acting as a buffer that absorbs demand spikes, smooths pressure and gives water a place to condense. A correctly sized tank lets a smaller compressor serve an intermittent load.
Why the tank matters
- Damps pulsation and pressure swings from the compressor
- Stores air so the compressor does not start and stop constantly
- Allows condensate to settle before the dryer and filters
- Provides reserve air during brief high-demand bursts
Sizing rules
A common starting point is 10–15 litres of tank volume per m³/min of compressor output for general duty, with larger tanks for systems with sharp demand peaks. The required volume also depends on the allowable pressure drop and the frequency of load cycles.
Placement
Install the tank upstream of the dryer for wet storage to capture moisture, and consider a smaller secondary receiver downstream of the dryer for dry storage at the point of high demand. Fit a safety valve, pressure gauge and automatic drain, and inspect the tank in line with local pressure-vessel regulations.