HW -0.8-40 40 bar bottle blowing air compressor is made expressly to blow air into bottles. It is comprised of a housing, a motor, a compressor, and a nozzle. The nozzle is linked to the housing, which houses the engine and compressor. Compressed air is often used by this device to blow air into the bottle. HW -0.8-40 40 bar bottle blowing air compressor is a type of pressure vessel that accepts air from the air compressor and holds it under pressure for later use. It is also referred to as an air compressor tank or a compressed air storage tank. The tanks are available in a variety of sizes and vertical and horizontal arrangements.