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WMN Depth Media Fine Filter

WMN Depth Media Fine Filter is a multi-functional filtration unit custom-designed for confined spaces and small oil tanks. It can simultaneously remove particulate contaminants, water, and sludge.

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WMN Depth Media Fine Filter
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WMN Depth Media Fine Filter
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The unit is compact and easy to install. Its detachable design simplifies transport, installation, and maintenance in confined spaces such as ships, wind turbines, hydraulic power units, and gearboxes.
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The depth media filter element has a strong affinity for water, absorbing and retaining free water and some emulsified water in the oil like a sponge, with a water removal efficiency of over 50%.
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The depth media filter element delivers high purification performance, with a filtration rating of 3 µm and a single-pass removal efficiency of over 99.5% for 3 µm particles. It also captures particles as small as 1 µm, helping reduce the equipment failure rate.
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The depth media filter element effectively captures gummy contaminants from oil degradation, such as oxidation products, varnish, and sludge, as well as acidic substances.
By continuously removing solid particles, water, and oxidation products, it slows down oil aging, reduces oil change frequency, and minimizes wear in the lubrication system.
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Product Features
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Product Features

Custom-designed for confined spaces and small oil reservoirs, featuring a compact, dismountable structure that facilitates easy handling, installation, and routine maintenance across marine vessels, wind turbines, hydraulic units, and gearboxes.
Compact Design & Confined-Space Versatility
Custom-designed for confined spaces and small oil reservoirs, featuring a compact, dismountable structure that facilitates easy handling, installation, and routine maintenance across marine vessels, wind turbines, hydraulic units, and gearboxes.
The depth media fine filter element delivers exceptional purification with a 3 μm rating, achieving a single-pass retention efficiency of >99.5% for particles ≥3 μm and >50% for 1 μm particles to eliminate fine abrasive wear.
High-Precision Micro-Particle Filtration
The depth media fine filter element delivers exceptional purification with a 3 μm rating, achieving a single-pass retention efficiency of >99.5% for particles ≥3 μm and >50% for 1 μm particles to eliminate fine abrasive wear.
Built with high water-affinity depth media that absorbs and securely locks in free water and emulsified water like a sponge, preventing moisture breakdown and fluid degradation.
High-Affinity Water Absorption & Retention
Built with high water-affinity depth media that absorbs and securely locks in free water and emulsified water like a sponge, preventing moisture breakdown and fluid degradation.
Effectively captures gel-like degradation contaminants including oxidation byproducts, varnish, sludge, and acidic compounds; continuous removal slows oil aging, extends oil-drain intervals, and lowers lubrication system wear and failure rates.
Varnish & Sludge Removal (Extended Oil Life)
Effectively captures gel-like degradation contaminants including oxidation byproducts, varnish, sludge, and acidic compounds; continuous removal slows oil aging, extends oil-drain intervals, and lowers lubrication system wear and failure rates.

How It Works

Uses a specially engineered depth media insert composed of multiple layers of specially treated natural cellulose fibers tightly compressed with a special reinforcing structure, forming a highly porous three-dimensional labyrinth.


As oil passes through the insert from outside to inside, contaminants are not merely blocked at the surface but captured at multiple levels throughout the full depth of the media — large particles are mechanically intercepted between fibers, while micron-sized particles are fixed by inertial impaction and adsorption.


This depth filtration gives the insert an enormous dirt-holding capacity and significantly extends its service life.

The WMN Depth Media Fine Filter has an absolute filtration rating of 3 μm and efficiently removes solid contaminants such as metal wear debris, dust and oxidation by-products from oil. The cellulose fibers also have an extremely strong affinity for water, absorbing and locking in free water and part of the emulsified water like a "sponge". In addition, the insert adsorbs soft contaminants such as varnish and sludge generated by oil degradation, preventing them from coking on hot spots in the system.


Because the filter media is pure natural fiber, it does not react chemically with oil additives and therefore does not strip beneficial additives such as anti-wear agents and antioxidants.


This technology is widely used in hydraulic systems, turbine oil systems, gearboxes, papermaking machinery, and other applications requiring extremely high oil cleanliness, significantly extending oil and equipment life and reducing maintenance costs.


Technical Specifications
No.ItemsSpecificationsSpecifications
1ModelWMN-3WMN-5
2Filtration Rating (μm)33
3Nominal Flow Rate (L/min)35
4Dirt-Holding Capacity (KG)4 (1 element set)8 (2 element set)
5Design Water Absorption Capacity (KG)2 (1 element set)4 (2 element set)
6Body MaterialCarbon steelCarbon steel
7Net Weight80KG90KG
8Dimensions (mm)970*500*900970*500*1005
9Applicable MediaHydraulic oil, turbine oil, and other conventional lubricants
(customization required for high-viscosity gear oil)
10Operating Temperature+20°C to +60°C
Customer Case Studies

Keep your oil clean. Keep your business running

Discover how removing particles, water, varnish and acids can reduce breakdowns, extend oil and equipment life, and lower maintenance costs.