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Van Air AC-20 Air Cooled Aftercooler
Voltage: 115-1-60 ODP, 1/2" NPT Connections
Van Air model AC-20 air cooled aftercooler supplies 35 SCFM at 100 psi with 250 F inlet and 15 F approach temperature. For other approach temperatures see the aftercooler brochure.
Features
- Ambient air flow: horizontal or vertical
- Floor or suspended mounting
- Steel cabinet with baked enamel finish
- Copper tubed, aluminum finned core
- Zinc chromate-plated steel fan guard
- Open vented motor with thermal overload
- NEMA frame: custom
Specifications
- Height in inches (A): 22
- Width in inches (B): 20
- Depth in inches (C): 12
- Height to inlet in inches (D): 8
- Height to outlet in inches (E): 8
- Connections (NPT): 1/2
- Motor HP: 1/12
- Voltage: 115-1-60 ODP
- Weight (lbs): 25
Sizing
- Determine inlet temperature to aftercooler
- Determine desired outlet temperature. (Aftercooler outlet temperature = ambient temperature + approach)
- Determine needed approach. (Approach = desired outlet temperature - ambient temperature)
- Find flow (SCFM) under column of correct inlet and approach temperature and read left for model number.
Approach Temperatures
To use the approach temperature tables you need to decide if you want a 5, 10, 15 or 20 degree approach temperature. Second you need to know your flow rate (SCFM). Third you need to know the temperature of your compressed air as it leaves the air compressor (discharge temperature). For example:
- Air Compressor produces 250 SCFM
- Compressed air discharge temperature 250 F
- And we want a 10 F approach temperature
The correct unit for these conditions is a AC-140
Approach temperature is the difference between the ambient temperature and the compressed air temperature. So, going back to our example. If the ambient temperature is 75°F and the approach temperature is 10°F than the compressed air will be approximately 85°F at the outlet of the air receiver. The compressed air enters 250°F and leaves 85°F. It is critical to have a separator and drain installed at the outlet of the aftercooler to collect all the moiture that drops out as the air is cooled.
Capacities (Maximum SCFM at 5, 10, 15 and 20 degrees F Approach)
