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Coalescer&Separator Filter Elements: The Solution for Water Removal in Oil

In hydraulic systems, water is a more insidious "killer" than solid particles. It causes oil emulsification, additive depletion, and component rusting. Coalescer&separator filter elements are specifically designed to remove water from oil.
Jun 22nd,2026 43 Views

1.How It Works (Two Stages)

Stage

Name

Function

1

Coalescing Layer

Merges small water droplets into large ones

2

Separation Layer

Allows oil to pass, blocks water

After treatment, free water content can be reduced from thousands of ppm to below 100–200 ppm.

2.Typical Applications

Turbine oil (steam turbine)

Aviation fuel / hydraulic oil

Marine fuel / lube oil

Industrial hydraulic oil, gear oil

3.Key Differences from Standard Filters

Comparison

Standard Filter

Coalescer Separator

Removes

Solid particles

Water (+ some particles)

Structure

Single stage

Two stages (Coalescer + Separator)

Housing

Standard

With sump & drain valve

Note: They work together, not as substitutes — remove solids first, then water.

4.Maintenance Tips

Check sump water level regularly and drain as needed

Replace coalescer element when ΔP reaches 0.15–0.2 MPa

Replace separator element at the same interval (recommended)

 

5.Customization & Brand Replacement Options

We offer high-quality coalescer separator elements with both customization and brand replacement support.

Replaceable Brands:

Pall-Velcon-Kaydon

 

Customization Options:

Size — Manufactured to your housing dimensions

Precision — 1~10μm available

Material — Fiberglass, polyester, stainless steel mesh, etc.

End cap / Interface — Adapts to different mounting styles

Seal material — NBR, FKM (Viton), etc.

 

Our Advantages:
✓ Direct drop-in replacement — no system modification
✓ Comparable filtration precision and β-ratio
✓ Flexible customization, shorter lead times
✓ Better cost-effectiveness

Provide OEM part number or drawing — we can quickly cross-reference or custom manufacture.

One-sentence summary: Remove water from oil with coalescing + separation. Customization and brand replacement available. Remove solids first, then water — double your system life.

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