Mist Eliminator – HDF Series

Why Mist Elimination Is Critical in Compressed Air Systems

Compressed air leaving a compressor often contains a combination of:

• Liquid water
• Oil aerosols
• Rust and piping debris

If these liquids are not removed early, they can:

• Overload downstream filters
• Destroy desiccant in regenerative dryers
• Reduce refrigerated dryer efficiency
• Cause corrosion, freezing, and fouling in equipment
• Increase maintenance costs and downtime

A ZEKS Mist Eliminator acts as the first line of defense, separating bulk liquids before they migrate through the system.

How a Mist Eliminator Works

Mist Eliminators remove liquids through mechanical separation, not adsorption or fine filtration.

Step‑by‑Step Operation

1. Wet compressed air enters the Mist Eliminator
2. Airflow velocity is reduced and redirected
3. Larger liquid droplets collide with internal separation surfaces
4. Droplets coalesce into heavier liquid
5. Liquids fall into the sump and are discharged through a drain
6. Cleaner compressed air continues downstream

Key distinction: Mist Eliminators remove liquid contamination, while downstream filters handle aerosols and particulates.  The extremely low pressure drop and long service life of the elements reduce energy and maintenance costs when compared to conventional filtration.

Where the HDF Series Fits in an Air System

The HDF Series mist eliminator is typically installed:

• Immediately downstream of the compressor discharge
• Before refrigerated or desiccant dryers
• Upstream of precision filters
• Ahead of aftercoolers or air receivers

This placement significantly improves dryer performance and protects sensitive filtration media.

Protecting Dryers and Filtration Equipment

Refrigerated Dryers

Removing bulk liquid and oil prevents:

• Flooded  / fouled heat exchangers
• Poor moisture separation
• Drain system overload
• Reduced cooling efficiency

Regenerative Desiccant Dryers

Liquid water is the number‑one cause of premature desiccant failure. Mist Eliminators help prevent:

• Desiccant bed saturation
• Channeling
• Valve contamination
• Inconsistent dew point performance

Proper liquid management upstream keeps dryers operating at their designed dew point.

Mist Eliminator vs. Coalescing Filter

Typical Applications

ZEKS HDF Series Mist Eliminators are ideal for:

• High‑moisture compressor discharge air
• Systems with frequent compressor unload/load cycling
• Facilities with high ambient humidity
• Compressor rooms without effective after cooling
• Systems feeding desiccant or refrigerated dryers
• Plants seeking reduced filter maintenance costs

Benefits of the ZEKS HDF Series

•  Removes bulk liquid water and oil
•  Reduces downstream filter element change outs
•  Protects desiccant beds and valves
•  Very low pressure drop for energy efficiency
•  Extends dryer and system component life
•  Long element service life – up to ten years between element replacement

Maintenance & Best Practices

Mist Eliminators require minimal maintenance, but best performance comes from:

• Verifying automatic drains operate correctly
• Inspecting during scheduled compressor maintenance
• Ensuring proper sizing for actual airflow conditions
• Monitoring upstream moisture conditions seasonally

A properly sized and maintained Mist Eliminator keeps liquid from re‑entering the air stream.

How the HDF Series Supports Complete Air Treatment

Mist elimination is a critical part of a layered air treatment strategy:

1. Mist Eliminator – Removes bulk liquid contamination
2. Refrigerated or Desiccant Dryer – Removes moisture vapor
3. Coalescing & Particulate Filters – Final air polishing

This approach delivers reliable air quality while minimizing operating costs.

Why Choose ZEKS Filtration Solutions

• Proven industrial designs
• Application‑driven sizing
• Compatible with ZEKS dryers and filtration
• Backed by technical and aftermarket support