Element-Free Compressed-Air Purifier
Upgrade compressed-air quality at the equipment inlet.
WELL AIR uses high-speed swirling airflow and impaction separation to remove water droplets, liquid oil droplets, and solid contaminants from compressed air. Its internal structure does not use a replaceable filter element, and it operates without electricity or an external heat source.
Water is not the only concern in compressed-air systems. Liquid oil and solid contaminants can also lead to pneumatic-equipment trouble, corrosion, product defects, and increased maintenance work. Even after compressed air passes through a dryer, condensate may form again near the equipment because of long piping and temperature changes.
Air dryers are effective for reducing moisture upstream, near the compressor. However, compressed air can cool as it travels through long piping, causing water vapor to condense again before reaching the point of use.
Liquid oil carried from the compressor and solid contaminants such as rust or debris inside the piping may also reach downstream equipment together with the condensate.
WELL AIR is installed close to the equipment inlet to separate liquid droplets and solid contaminants before they enter the machine. It serves as a point-of-use pretreatment stage for achieving the air quality required by each application.
This test video shows how WELL AIR separates liquid water droplets from compressed air. It provides a visual overview of the role WELL AIR can play as point-of-use protection near the equipment inlet.
* The video demonstrates water-droplet separation under the test conditions shown. Actual results may vary depending on flow rate, pressure, piping, and operating conditions.
For international markets, WELL AIR is offered in the DT configuration, designed with consideration for drain containing liquid oil and solid contaminants.
WELL AIR does not use a replaceable filter element in its internal separation structure. Water droplets, liquid oil droplets, and solid contaminants are separated by airflow rather than trapped in a replaceable element.
Compressed air is rotated at high speed inside the unit. Centrifugal force and impaction separation move heavier water droplets, oil droplets, and solid contaminants toward the outer wall and down to the drain section.
The international-market DT configuration is designed with consideration for drain containing liquid oil and solid contaminants. The drain outlet uses a 6 mm hose nipple.
The international product lineup consists of WA-150DT, WA-400DT, and WA-1200DT. Availability and specifications should be confirmed for the destination country and application.
View International LineupFor North America, product information is currently provided through the North America Edition catalog. Please refer to the catalog for market-specific information.
View North America Edition
Compressed air entering the unit is rotated at high speed. Centrifugal force and impaction separation move the heavier water droplets, liquid oil droplets, and solid contaminants toward the outer wall.
The internal separation structure does not use a replaceable filter element. For international markets, the DT configuration is used with consideration for drain containing liquid oil and solid contaminants.
WELL AIR does not remove water vapor or oil vapor. If fine particles, oil mist, or a specified dew point must also be controlled, suitable downstream filtration or drying equipment should be selected separately.
Starting with WELL AIR, additional treatment stages can be selected according to the air quality required by the application. The configuration can be expanded from the separation of water droplets, oil droplets, and foreign matter to the removal of fine particles, oil mist, and water vapor.
| Item | WELL AIR Standalone | WELL AIR CLEAN | WELL AIR DRY |
|---|---|---|---|
| Configuration | WELL AIR |
WELL AIR + Precision Filter |
WELL AIR + Precision Filter + Membrane Air Dryer |
| Main treatment target |
Water droplets, oil droplets, and solid particles 3 μm or larger |
Fine particles and oil mist Precision filter rating: 0.01 μm |
Reduction of water vapor for lower dew point |
| Typical applications |
Solenoid valves and cylinders Pneumatic tools General air blow |
Precision processing Painting and coating High-quality air blow |
Precision measurement Condensation prevention Equipment requiring low-dew-point air |
| Air-quality objective |
Treatment of liquid droplets and coarse particles |
Treatment of fine particles and oil mist |
Water-vapor reduction and lower dew point |
|
ISO 8573-1 system target |
[3:4:-] | [1:4:2] | [1:Selected Specification:2] |
* ISO 8573-1 classes are shown in the order of solid particles, water, and total oil. The stated values are system targets based on the rated performance of the configured equipment and our internal test results. They are not guaranteed values.
* Water Class 4 assumes that an appropriate refrigerated air dryer is installed upstream. “-” indicates that no class is specified. The water class for WELL AIR DRY depends on inlet conditions and the selected specification.
Click the image to view it at full size.
WELL AIR first separates water droplets, oil droplets, and coarse foreign matter. A precision filter or membrane air dryer can then be added according to the air quality required by the application.
Use WELL AIR as a standalone unit for general pneumatic applications, WELL AIR CLEAN when fine particles and oil mist must also be treated, and WELL AIR DRY when lower-dew-point air is required.
Rather than relying on one device to handle every type of contaminant, each stage performs a suitable role: liquid droplets and coarse particles first, followed by fine particles and oil mist, and then water vapor when required.
Configuration selection: The appropriate configuration depends on the required air quality, flow rate, inlet pressure, inlet temperature, and piping conditions. Please contact us for application-specific selection.
International markets: WELL AIR units are supplied in the DT specification. Availability of downstream components may vary by market.
North America: Product information is currently provided through the North America catalog.
Technical Column
Our technical columns explain why an air dryer alone may not prevent condensate at the point of use, how different dryer types work, and how WELL AIR can be incorporated into a staged treatment system.
