316L SS Fiber Felt

SS Pleated Felt Filter Element

Sintered 316L stainless steel fiber felt, pleated for maximum area. 70–80% porosity — low pressure drop even at high flow rates and with viscous feeds.

3–150 µmFilter rating (depth)

70–80%Porosity

≤ 400 °CMax operating temp

≥99%Filtration efficiency

SS Pleated Felt Filter Elements, pair with end caps

SS Pleated Felt Filter Elements side by side

SS Pleated Felt Filter Elements, open end detail

Filter Cartridge

SS Pleated Felt Filter Element

Made from 316L stainless steel fibers (diameter 4–20 µm) laid in a non-woven mat and sintered at high temperature into a rigid felt sheet, then formed into a pleated geometry. The fiber structure gives 70–80% void volume — roughly twice the porosity of sintered powder media.

Material

316L SS fiber (304 on request)

Fiber diameter

4 – 20 µm

Filter rating

3 – 150 µm (depth filtration)

Porosity

70 – 80%

Max temperature

400 °C (element)

Filtration eff.

≥ 99%

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Depth filtration: particles are captured throughout the full wall thickness rather than only at the entry face. This makes performance less sensitive to particle size distribution and gives the element a large dirt-holding capacity before blinding. At the same flow rate, pressure drop is significantly lower than a sintered powder element of equivalent pore rating.

The pleated geometry multiplies effective filtration area 3–5× within a standard housing length. Fiber-to-fiber sintering — no binder, no adhesive — means there is nothing to fail in solvents or at temperature, and no fiber shedding into the filtrate stream. Standard 316L; 304 stainless steel fiber is available on request.

Technical Specifications

SS Pleated Felt Filter Element — Full Specification

Properties & Performance

Material

316L SS fiber (304 on request)

Fiber diameter

4 – 20 µm

Filter rating

3 – 150 µm (depth)

Porosity

70 – 80%

Permeability

350 – 450 L/(m²·s)

Tensile strength

≥ 20 N/mm²

Filtration eff.

≥ 99%

Max pressure

Frame-dependent

Max temperature

400 °C (element)

Dimensions & Configuration

Tube OD

Standard and custom housing sizes

Tube length

100 – 1,200 mm

Pleat bonding

Sintered — no adhesive

End caps

316L welded; custom alloy on request

Outer support

Optional perforated 316L cage — protects pleats during backwash and handling

Cleaning method

Backwash, ultrasonic, solvent soak

Standard

GB/T 20100-2006

Custom dims

Yes

Product Features

Why Pleated Felt Elements Hold Up in Service

70–80% Porosity

Fiber felt has roughly twice the void volume of sintered powder media — the open structure handles high-viscosity fluids and high-solids feeds with low differential pressure.

Depth Filtration

Particles are captured throughout the wall thickness, not just at the surface. Large dirt-holding capacity extends service intervals in variable-quality feed streams.

No Fiber Shedding

Fibers are sintered together — not bonded with adhesive. The structure cannot shed fibers into the filtrate, even under backwash pressure or temperature cycling.

Fully Regenerable

Backwash, ultrasonic cleaning, or solvent/acid soak restores original flux. Rated for extended service life in continuous industrial processes.

Rated to 400 °C

Standard 316L elements rated to 400 °C, not recommended above. 304 fiber felt available on request.

Fits Standard Housings

Pleated geometry in standard DOE, 222/226, and custom end-cap configurations to fit existing installed housings.

Applications

Typical Duty for Pleated Felt Elements

Polymer Melt Filtration

High void volume handles viscous polymer melts in PET, PP, and nylon film and fiber production without excessive pressure drop.

10–50 µm · High viscosity · 304 option

Catalyst Recovery

Depth structure captures fine catalyst particles from reactor effluents with high capacity before cleaning is needed.

3–25 µm · 316L · Depth filtration

Bioprocess Broth Clarification

High dirt-holding capacity handles fermentation broths and cell debris. CIP-compatible for validated pharmaceutical processes.

5–50 µm · CIP-rated · 316L

Chemical Fiber Production

Filtration of spinning dope and fiber solutions in chemical fiber manufacturing — consistent filtration prevents spinnerette blockage.

5–25 µm · Low ΔP · Depth

Oil-Water Separation

Coalescence and separation of oil from water in produced water and industrial effluent treatment.

10–100 µm · 316L · High void

Food Processing

Clarification filtration for edible oils, syrups, and food-grade liquids. 316L meets food-contact requirements.

5–50 µm · FDA 316L · CIP

SS Pleated Felt Filter Element

SS Pleated Felt Filter Element

SS Pleated Felt Filter Element — Full Specification