It Does Not Remove Water Vapor
WELL AIR separates liquid water droplets, but it is not a dehumidifier and does not remove water vapor itself. Where a lower pressure dew point is required, a configuration such as WELL AIR DRY should be considered.
Compressed-Air Quality Control, Right at the Equipment Inlet
Stop Air-System Trouble Before It Reaches Your Equipment.
Even after an air dryer, condensate can re-form near the equipment due to long piping runs and temperature changes. WELL AIR separates water droplets, liquid oil droplets, and solid contaminants at the equipment inlet—without electricity or a replaceable filter element.
You can contact us even if the required model, flow rate, or piping conditions have not yet been finalized.
Final Protection at the Equipment Inlet
No Electricity / No Replaceable Filter Element
163,184
Units Shipped
30+ Years
Supplying Industrial Equipment Since 1992
100% Inspection
Every Unit Pressure-Tested for Air Leakage
99.99%
Removal of Water Droplets, Liquid Oil and Particles ≥3 μm*
PROBLEM | CAUSES OF AIR-SYSTEM TROUBLE
Upstream Treatment Alone May Not Prevent
Problems at the Point of Use
Illustration showing water droplets, oil, rust and solid contaminants that may form or travel inside compressed-air piping.
Even when compressed-air quality is controlled upstream, the air can cool as it travels through long piping runs, causing water vapor to re-condense near the equipment.
Liquid oil carried from the compressor, together with rust and other solid contaminants from inside the piping, may also reach downstream pneumatic equipment.
Customer Support After Equipment Delivery
When an air-system problem occurs at a customer’s facility,
investigation, explanation and on-site support may be required.
Investigation After an Unexpected Shutdown
Once production has stopped, tracing the cause through the piping
and pneumatic components requires time and labor.
An Increasing Number of Maintenance Points
Adding more replaceable filters also increases the number of
components that must be inspected and replaced.
WHY | POINT-OF-USE TREATMENT
Finish the Required Air Quality
at the Equipment Inlet
An air dryer is effective for reducing moisture upstream. However, when compressed air cools as it travels through long piping, remaining water vapor can re-condense into liquid droplets near the equipment.
WELL AIR handles liquid droplets and contaminants that form or travel through the downstream piping, immediately before the compressed air enters the equipment.
Upstream Treatment
Reduce moisture with an air dryer
Long Piping Run
Air temperature changes during transport
Re-Condensation
Remaining water vapor becomes liquid droplets
Equipment Inlet
WELL AIR separates droplets and contaminants
Moisture is reduced upstream, while liquid droplets and contaminants that form or travel through the downstream piping are treated by WELL AIR at the equipment inlet.
SOLUTION | HOW SEPARATION WORKS
High-Speed Swirling Flow Separates Liquid Droplets and Contaminants
Compressed air is made to swirl rapidly inside the unit. Centrifugal force and impaction separation move heavier water droplets, liquid oil droplets and solid contaminants toward the outer wall.
The separated liquids and contaminants fall to the bottom of the unit and are discharged through the drain outlet. The treated air collects near the center and flows toward the downstream equipment.
No Electricity Required
Operates using the compressed-air flow
No Replaceable Filter Element
Uses an element-free separation structure
Retrofit to Existing Piping
Install near the inlet of the equipment to be protected
Separated Matter Drains Downward
Water, liquid oil and solids are discharged as drain
TECHNOLOGY MOVIE | INTERNAL AIRFLOW
See How the Separation Process Works
This CG animation shows how compressed air swirls inside WELL AIR, moving water droplets, liquid oil droplets and solid contaminants toward the outer wall through centrifugal force and impaction.
The animation is intended to explain the basic separation principle. Actual airflow and separation behavior may vary depending on flow rate, pressure, temperature, piping conditions and the state of the drain.
ACTUAL INSTALLATIONS
WELL AIR Works Right Where the Equipment Needs Protection
WELL AIR can be installed near the equipment inlet or integrated into the machine’s pneumatic circuit. From retrofitting existing equipment to integration into new machinery, the model and configuration are selected according to the required flow rate, piping conditions, and available installation space.
Installed in a Demanding Operating Environment
An example of WELL AIR installed close to the equipment in an environment exposed to a high level of dust.
Integrated into the Machine’s Pneumatic Circuit
An example of WELL AIR integrated into an actual machine while the installation position and piping configuration are being checked.
Installed Near the Equipment Inlet
An example of WELL AIR installed near the compressed-air inlet to protect downstream pneumatic equipment.
*The photographs show installation and integration examples. The installation position, piping method, selected model, and system configuration vary according to the operating conditions.
PROVEN RELIABILITY | TRACK RECORD & PERFORMANCE
Evidence to Support Your Evaluation
When evaluating a new compressed-air device, the separation principle alone is not enough. A long-term supply record, verified performance and consistent inspection are also important.
163,184
Units shipped for machine tools and other industrial applications
30+ Years
Continuous supply to industrial equipment applications since 1992
99.99%
Removal of water droplets and liquid oil under our test conditions
99.99%
Removal of solid particles 3 μm and larger under our test conditions
* The cumulative shipment figure is based on internal records as of October 21, 2026. Removal performance is based on testing conducted under our specified conditions. Actual performance may vary depending on flow rate, pressure, temperature, piping configuration and drain conditions. WELL AIR alone does not remove water vapor or oil vapor.
Every Unit Is Inspected Before Shipment
Each WELL AIR unit is pressurized and checked individually for air
leakage before shipment.
LIMITS | SCOPE & LIMITATIONS
What WELL AIR Alone Does Not Do
WELL AIR is not designed to treat every type of compressed-air contaminant with a single device. The appropriate downstream equipment should be selected according to the required air quality.
Fine Particles and Oil Mist Require Downstream Filtration
When finer particles or oil mist must also be treated, a precision filter should be installed downstream. WELL AIR CLEAN is one available configuration for these applications.
Element-Free Does Not Mean Maintenance-Free
Inspection of the unit, piping and drain-discharge section is still required according to the operating conditions. No replaceable filter element does not mean that inspection is unnecessary.
LINEUP | SELECT BY REQUIRED AIR QUALITY
Select the Configuration for Your Required Air Quality
Start with WELL AIR as a standalone unit, then add downstream treatment when finer particles, oil mist or water vapor must also be controlled.
The appropriate model and configuration are selected according to flow rate, pressure, piping size, operating conditions and required compressed-air quality.
STANDALONE UNIT
WELL AIR
Separates water droplets, liquid oil droplets and solid contaminants at the equipment inlet.
WA-150DT to WA-2500DT
WITH PRECISION FILTRATION
WELL AIR CLEAN
Adds downstream precision filtration for finer particles and oil mist.
Precision Machining / Painting
WITH MEMBRANE AIR DRYER
WELL AIR DRY
Adds precision filtration and a membrane air dryer to reduce water vapor and achieve a lower pressure dew point.
Precision Measurement / Condensation Control
CUSTOM APPLICATION
High-Flow & Special Configurations
Individually selected for higher flow rates or special operating requirements.
Selected According to Application ConditionsWater droplets, liquid oil droplets and solid contaminants
WELL AIR
Fine particles and oil mist
WELL AIR CLEAN
Water-vapor reduction and a lower pressure dew point
WELL AIR DRY
High flow rate or special operating conditions
Individual Selection
FIT | WHEN TO CONSULT US
Contact Us If Any of These Conditions Apply
You do not need to wait for equipment failure. We can begin reviewing the application when condensate, unstable pneumatic operation or increasing maintenance requirements first become a concern.
For Machine and Equipment Manufacturers
- You want to reduce air-related problems after delivering equipment to your customer.
- You want to evaluate WELL AIR as a service or retrofit component.
- You are considering it as an optional component for your equipment.
- You want to assess its suitability for future standard installation.
- You want to avoid increasing the number of replaceable filter elements.
For Plant Engineering and Maintenance Teams
- Water droplets still appear near the equipment even with an air dryer installed.
- Cylinders, valves or other pneumatic components operate inconsistently.
- You want to reduce investigation work after unexpected equipment shutdowns.
- You want to avoid major modifications to the existing piping.
- You do not want to add more replaceable filters to your maintenance program.
Not Sure Whether a Standalone WELL AIR Unit Is Enough?
Tell us the required air quality and the problem you are experiencing.
When finer particles, oil mist or a lower pressure dew point must also
be addressed, we can review a configuration such as WELL AIR CLEAN or
WELL AIR DRY. We can begin with the information currently available,
even if the required flow rate or pressure has not yet been finalized.
Tell Us the Symptoms Before Selecting a Model
Detailed specifications are not required at the first stage. Tell us the equipment, application and current symptoms using the information you already have.
ACTION | PRODUCT SELECTION SUPPORT
Start by Asking,
“Is WELL AIR Suitable for This Problem?”
The equipment name, application and current symptoms are enough to begin the discussion. Items such as flow rate, pressure and piping size can be confirmed later if they are not yet available.
- Share the application, target equipment and current symptoms.
- We identify the additional operating conditions required for selection.
- We propose a suitable model, configuration and quotation.