What is a liquid filter bag?

A liquid filter bag is a disposable depth-filtration vessel made of nylon, polypropylene (PP), polyester (PE) or PTFE media, welded or sewn into a bag shape, used to remove solids from liquids in industrial filtration systems. Cox Filter Bag has manufactured them since 2005 in Zaozhuang, China.

Are Cox Filter Bag products compatible with EATON / 3M / Hayflow?

Yes. Our POXL/PEXL series are direct replacements for EATON DURAGAF, the 3M DF series for their cartridge lines, and our Hayflow-style bags match the original Hayflow part numbers. Full cross-reference tables are published on every product page.

What certifications do your filter bags hold?

ISO 9001 quality management, CE marking for EU compliance, REACH for chemical safety, and FDA-grade material options for food/beverage contact. Full certificate PDFs are downloadable from the Certifications page.

About Cox Filter Bag

Two decades of focus on liquid & dust filtration — manufacturing and exporting since 2005.

Cox Filter Bag (ZAOZHUANG COX INDUSTRY TECHNOLOGY) is a manufacturer and exporter of liquid filtration products based in Zaozhuang Hi-Tech Zone, Shandong, China.
Founded in 2005, we have spent two decades engineering filter bags and filter media for industrial liquid filtration across more than 30 countries.

We specialize in high-efficiency liquid filter bags — needle felt, woven monofilament and multifilament mesh — in nylon, polypropylene (PP), polyester (ON), PTFE and stainless steel. Our signature ranges include extended-life POXL and PEXL bags,
(compatible with EATON DURAGAF), Hayflow-compatible replacement bags, 3M DF replacement filter cartridges, and absolute-rated AGF / PGF / LCR series achieving up to 99.9% efficiency.

Company at a Glance

Established	2005
Location	Zaozhuang City, Shandong, China 277800
Facility Area	[5,000] m²
Employees	[50]
Annual Output	[1,200,000] filter bags
Service Clients	[300+]
Export Markets	North America, Europe, Southeast Asia, Middle East, South America
Quality System	ISO 9001 certified
Nearest Port	Qingdao Port

2005

Founded

50+

Countries Served

0.2–2000

Micron Range (µm)

99.9%

Max Efficiency

Our Story

2005 — Founded Cox Filter Bag was established, separated from our parent company to serve growing international demand for liquid filter bags and filter housing.

2008 — ExpansionExpanded into filter cartridge production; began exporting to Southeast Asia and the Middle East.

2015 — POXL/PEXL LaunchLaunched the POXL/PEXL extended-life range as a cost-effective alternative to 3M/Cuno Filters / Eaton / PALL(FSI) / Pentair replacements.

2020 — Absolute-Rated SeriesIntroduced absolute-rated AGF, PGF and LCR series for high-efficiency applications up to 99.9%.

Today — Global ReachServing customers in over 30 countries with a complete range of liquid filter bags, filter cartridges and filter housings.

Why Buyers Choose Cox

Years of Focus

Exclusively on filtration industry — not a general trading company. Deep material and application expertise.

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Drop-in Compatibility

Full cross-reference tables for 3M/Cuno Filters / Eaton / PALL(FSI) / Pentair part numbers, so you order the exact replacement.

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Material Depth

Nylon, PP, ON, PTFE, kowiri tira; felt, monofilament and multifilament mesh; 0.2–2000 micron.

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Custom Manufacturing

OEM sizes, special collar/ring types, and media treatment (heat-setting, calendering, singeing, anti-static).

Cost Advantage

Equivalent filtration performance at 1/3 ki 1/5 of OEM pricing, with 2–5× longer service life on extended-life ranges.

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Reliable Delivery

7–15 day lead time on standard items, FOB Qingdao. Samples in 3–5 days. Third-party inspection welcome.

Get Our Full Company Profile & Catalog

Request the PDF company profile, product catalog, and certification documents — we typically respond within 4 hours.