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Engineered for Extreme Recovery & Recycling

Waste oil recovery is a “hard” service. Our Stainless Steel Liquid Filter Bag are the industry choice for:

Thermal Resilience: Operates effortlessly in high-temperature streams where synthetic polymers (PP/PE) would fail.

Hard Particle Retention: Ideal for capturing “abrasives” like weld slag, rust, metal shavings, and heavy scale.

Rigid Pore Integrity: Unlike felt, our SS mesh has a fixed, non-deformable aperture that maintains its micron rating even under high differential pressure.

Economic Reusability: The smooth, electro-polished surface is easy to clean. These bags tolerate backwashing and manual cleaning, significantly reducing your Cost-Per-Litre and waste disposal footprint.

Technical Specifications & Customization

Feature	304 Stainless Steel	316 Stainless Steel
Best For	General industrial, oils, and non-corrosive fluids.	Corrosive fluids, marine, and acidic waste oil.
Max Temp	Up to 400°C+ (Housing dependent)	Up to 400°C+ (Housing dependent)
Micron Range	10 µm to 1250 µm	10 µm to 1250 µm
Cleaning	Washable / Limited Backwash	Washable / Limited Backwash
Sealing	SS Ring / Custom Flange	SS Ring / Titanium / Custom Flange

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Critical Applications: From Waste to Value

Industry	Process Application	The SS Bag Advantage
Waste Oil Recycling (USA/Europe)	Used Motor Oil (UMO) & Lube Oil Recovery.	Handles high-heat “cracking” processes and removes heavy metal sludge.
Petrochemical (Middle East)	Amine Loops & Hot Catalyst Recovery.	Resists chemical attack and protects downstream high-pressure pumps.
Marine & Defense	Heavy Fuel Oil (HFO) Filtration.	Durable enough for high-vibration engine rooms and shipboard recycling.
Industrial Flushing	Pipeline & Boiler Commissioning.	The “Zero-Failure” choice for capturing weld slag and construction debris.

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AQ: Stainless Steel (SS304/316) Liquid Filter Bags

1. Why use a Stainless Steel bag instead of a standard felt bag?

Standard bags are “one-and-done” disposables. In waste oil recycling, filters clog quickly. A Stainless Steel bag is an investment; it can be cleaned and reused multiple times, making it the most economical replacement for high-pollution processes where you would otherwise change bags every hour.

2. What is the difference between 304 and 316 Stainless Steel?

SS304 is excellent for most oils and general industrial water. SS316 contains Molybdenum, which makes it far more resistant to corrosion from chlorides (saltwater) and aggressive chemicals found in some petrochemical waste streams.

3. Can I backwash these bags?

Yes. Due to our rigid pore opening structure, these bags are designed to tolerate a limited number of backwashes. This is perfect for automated systems where downtime for manual cleaning must be minimized.

4. Are custom sizes available?

Absolutely. While we supply standard #1, #2, #3, and #4 sizes to fit Eaton, FSI, and Pall housings, K Filter specializes in scientifically tested custom dimensions to fit unique or legacy filtration vessels in older refineries.

5. Can these bags handle “Hard Particles”?

Yes. Unlike needle felt, which can be “pierced” by sharp metal shards or weld slag, the woven stainless steel wire mesh provides a metallic barrier that is nearly impossible to puncture under standard operating pressures.

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Comparison difference between Extended life depth filtration (protracted) and High temperature metallic Filtration (Stainless Steel)

Technical Comparison: Protracted Series vs. Stainless Steel (SS304/316) Series

Feature	Protracted Series (LP Felt)	Stainless Steel (SS) Series
Filtration Type	Deep-Bed Depth Filtration	Rigid Surface Filtration
Primary Material	Extended-Life Polypropylene / Polyester	Woven 304 or 316 Stainless Steel Mesh
Contaminant Focus	Gels, Emulsions, and Soft Solids	Hard Particles, Slag, and Scale
Reusability	Disposable (High dirt-holding capacity)	Fully Washable & Reusable
Max Temperature	Up to 150°C (Polyester)	Up to 400°C+ (Metal limited only by ring)
Bypass Control	100% Thermally Welded Seams	Rigid Welded/Mechanical Fixed Apertures
Best Application	Chemical Polishing / Food Processing	Waste Oil Recycling / Hot Bitumen

1. The Nature of the Contaminant

Choose the Protracted Series if: You are dealing with “deformable” particles. If your fluid contains gels, resins, or latex, the thick felt matrix of the Protracted Series will trap them. A metal screen (SS Series) would likely allow these soft particles to “extrude” through the mesh under pressure.

Choose the Stainless Steel Series if: You are filtering hard, abrasive debris. If your waste oil has metal shavings, weld slag, or rust flakes, they will quickly shred a felt bag. The SS Series acts as a permanent metallic barrier.

2. Temperature & Chemistry

Choose the Protracted Series if: You need FDA compliance for food or pharma at moderate temperatures. It is the economical choice for high-volume water and chemical polishing.

Choose the Stainless Steel Series if: You are operating a Waste Oil Recycling plant or a Petrochemical refinery where temperatures exceed 150°C. It is the only “economical” choice because it survives heat that would melt any synthetic fiber.

3. Operational Workflow

The Protracted Series is designed for “Fit and Forget” convenience. It lasts 2–5x longer than standard bags, reducing the frequency of changes, but it is thrown away once full.

The Stainless Steel Series is a “Capital Asset.” It requires a cleaning station (backwashing or ultrasonic cleaning), but once cleaned, it goes back into service, nearly eliminating your ongoing filter purchase costs.

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