Cylinder Filter Tube: what’s changing, what still matters

If you’ve worked around process lines, you already know that a cylinder filter can make or break uptime. Over the past two years I’ve seen buyers shift from “cheap and fast” to “traceable and testable.” Not glamorous, sure, but it keeps pumps happy and QA off your back.

What it is (and why plants are swapping them in)

The Cylinder Filter Tube from Ansheng (Origin: No.346 Xinying East Street, Anping County, Hebei, China) is a welded, press-formed screen element built for repeatable separations—polymer melt guards, solvent polishing, edible oil pre-filtration, powder capture, you name it. The shop floor toolkit includes welding, spot welding, seam welding, and press forming—which, to be honest, is what you want for true-to-drawing tolerances. Many customers say the big win is consistent differential pressure across batches. I’ve seen that too.

Typical specifications

Parameter	Typical Range	Notes (real-world use may vary)
Media	SS304/316L, Duplex 2205, Hastelloy C-276, Ti	ASTM E2016 wire cloth; sintered mesh option
Micron rating	10–500 μm (custom up to 2000 μm)	ISO 16889 multi-pass correlation
Diameter × Length	Ø20–300 mm × 50–1200 mm	Tolerances ≈ ±0.3 mm typical
End style	Welded caps, flanged, threaded, quick-clamp	FDA/EU contact materials on request
Pressure/Temp	Up to ≈2.5 MPa / 400°C	Verify per medium; safety margin required
Service life	6–24 months	Depends on ΔP, CIP frequency, abrasion

How it’s made (quick process flow)

• Materials: SS wire cloth/perf tube; optional sintered laminate; food-grade elastomers.
• Forming: press rolling → seam welding (TIG/laser) → end-cap welding/spot welds → full passivation.
• Testing: ISO 2941 collapse test; ISO 3968 flow vs. ΔP; ISO 3724 fatigue; ISO 16889 efficiency (β-ratios).
• QA: dimensional check, burst test samples, dye penetrant on critical welds, surface Ra for sanitary builds.

Applications I keep seeing

- Chemical/solvent lines, polymer melt screens, edible oil and dairy prefilters, brewery DE traps, lithium slurry, water treatment, and even sand control. One maintenance lead told me the cylinder filter beat their pleats in abrasive brine simply because the welded cage didn’t deform under surges.

Real test data (sample)

β10 ≥ 200 (ISO 16889), collapse resistance ≥ 1.8 MPa (ISO 2941), ΔP at 50 L/min on 100 μm media ≈ 9–12 kPa (ISO 3968 rig). Certifications available: ISO 9001; material certs (EN 10204 3.1). Food-contact builds can align with FDA 21 CFR and EU 1935/2004—ask for dossiers.

Vendor snapshot (short and honest)

Vendor	Customization	Testing	Lead Time	Notes
Ansheng (Hebei)	High—drawings to spec, odd sizes OK	ISO 16889/2941/3968 reports	≈ 10–20 days	Strong weld QC; responsive on samples
Generic importer	Medium	Basic; limited traceability	≈ 25–40 days	Cheaper, but spec drift happens
OEM brand	Medium–High	Full validation packs	≈ 4–8 weeks	Premium pricing; strong global support

Customization and a quick case

Options: graded porosity (sintered), perforated cores, clamp collars, sanitary polish (Ra ≤ 0.8 μm), and CIP-ready welds. In a brewery retrofit, a 50 μm cylinder filter with sintered laminate cut diatomaceous earth carryover by ~22% and reduced changeouts from weekly to every 3–4 weeks. Another lithium-slurry line saw ΔP stability across a 12-hour run, which—surprisingly—mattered more than absolute efficiency.

Buying checklist (trust me, it helps)

• Define micron rating and target β-ratio; share fluid viscosity and temperature.
• Specify end connections and cleaning method (CIP/solvent/backflush).
• Ask for ISO 16889/2941 test summaries and EN 10204 3.1 certs.
• Request a pilot lot; track ΔP, throughput, and fouling mode for 2–3 cycles.

Bottom line: a well-built cylinder filter isn’t flashy, but it’s a quiet productivity hack. Get the metallurgy, weld quality, and test data right—and the rest of the line gets easier.

References

1. ISO 16889: Hydraulic fluid power—Filters—Multi-pass method for evaluating filtration performance.
2. ISO 2941 / ISO 3724 / ISO 3968: Collapse/burst, fatigue, and pressure drop characteristics of filter elements.
3. ASTM E2016: Standard Specification for Industrial Woven Wire Cloth.
4. FDA 21 CFR and EU 1935/2004: Food-contact materials compliance frameworks.