Pneum Systems Inc. Manufactures Horizontal Air Receiver with Compressors Up to 20 HP. Pneum Systems Inc also manufactures various types of heatless air dryers. The Horizontal Air Receiver with Compressors Up to 20 HP has mild steel shell and copper tubes. The Horizontal Air Receiver with Compressors Up to 20 HP has a moisture separator at the outlet of the cooler which removes the oil and water droplets formed due to cooling. This Horizontal Air Receiver has capacities ranging from 10CFM to 6000 CFM with various working pressures.