20 Inch Cartridge Air Filter | Dust Collector & Compressor Elements

A 20 inch cartridge air filter refers to the element's overall length, and is one of the most common sizes in industrial dust collection and compressed air filtration. DeMalong Filter manufactures 20 inch cartridge elements in a range of diameters, end-cap configurations, and media grades as replacements for major OEM housings. Send us your housing model or your old element's dimensions and we'll match the correct specification.

How to Specify a 20 Inch Cartridge Air Filter

Length alone does not determine fit. To identify the right element, we need four things from you:

1. Overall Length	20 in (508 mm) nominal — confirm your actual measurement, as "20 inch" is sometimes rounded from 19.5–20.5 in
2. Outer Diameter	Common OD sizes in this length include 6 in (152 mm), 8 in (203 mm), and 12.75 in (324 mm)
3. Inner Diameter	Determines how the element seats on the housing's center tube
4. End Cap Configuration	Open/open, open/closed, flanged with gasket groove, or threaded — this is what actually determines whether the element seals correctly

1. Overall Length

20 in (508 mm) nominal — confirm your actual measurement, as "20 inch" is sometimes rounded from 19.5–20.5 in

2. Outer Diameter

Common OD sizes in this length include 6 in (152 mm), 8 in (203 mm), and 12.75 in (324 mm)

3. Inner Diameter

Determines how the element seats on the housing's center tube

4. End Cap Configuration

Open/open, open/closed, flanged with gasket groove, or threaded — this is what actually determines whether the element seals correctly

Media Options

Cellulose / Cellulose Blend	General industrial dust, lowest cost, suitable for dry non-abrasive dust
Spunbond Polyester	Washable, better for moist or fibrous dust and pulse-jet cleaning cycles
Nanofiber Coated	Higher submicron efficiency and better pulse-cleaning release, extends element life
PTFE Membrane	Surface filtration for fine, sticky, or hygroscopic dust; highest efficiency
Flame Retardant / Antistatic	Required where combustible dust or static discharge is a hazard

Cellulose / Cellulose Blend

General industrial dust, lowest cost, suitable for dry non-abrasive dust

Spunbond Polyester

Washable, better for moist or fibrous dust and pulse-jet cleaning cycles

Nanofiber Coated

Higher submicron efficiency and better pulse-cleaning release, extends element life

PTFE Membrane

Surface filtration for fine, sticky, or hygroscopic dust; highest efficiency

Flame Retardant / Antistatic

Required where combustible dust or static discharge is a hazard

Common Applications for 20 Inch Cartridge Elements

Industrial dust collectors — welding fume, grinding, plasma cutting, woodworking

Powder handling and bulk material processing baghouse retrofits

Compressed air intake filtration on larger compressor packages

Gas turbine intake filtration systems

Cement, mining, pharmaceutical, and food processing dust control

Quality & Testing

DeMalong Filter cartridge elements are manufactured under ISO 9001 quality management and tested to ISO 5011 for air filtration efficiency and dust holding capacity. Pleat spacing is controlled to maintain effective filtration area under pulse-jet cleaning, and end caps are bonded and inspected for seal integrity before packaging.

Packaging, Lead Time & Customization

Packaging	Individual carton with DeMalong brand and part number, or neutral/customer-branded packaging on request
Samples	Available for testing and fitment verification before bulk order
Customization	Custom lengths, diameters, end caps, and media grades — 20 inch is a standard size we produce to order
Lead Time & MOQ	Varies by specification and order quantity — contact us for a specific lead time and MOQ quote

Packaging

Individual carton with DeMalong brand and part number, or neutral/customer-branded packaging on request

Samples

Available for testing and fitment verification before bulk order

Customization

Custom lengths, diameters, end caps, and media grades — 20 inch is a standard size we produce to order

Lead Time & MOQ

Varies by specification and order quantity — contact us for a specific lead time and MOQ quote

Frequently Asked Questions

Will any 20 inch cartridge filter fit my housing?

No. Length is only one of four dimensions that matter — outer diameter, inner diameter, and end-cap configuration also have to match. Send us your housing model or old element and we'll confirm.

Is "20 inch" the length or the diameter?

In cartridge filter terminology it almost always refers to the overall length. Diameters in this length typically range from 6 to 12.75 inches.

Which media should I choose?

It depends on your dust: cellulose for dry general dust, spunbond polyester for moist or fibrous dust, nanofiber for finer particulate and longer life, PTFE membrane for sticky or submicron dust, and flame-retardant/antistatic where combustible dust is present.

Can you match an element if I only have the old one, with no part number?

Yes. Send us photos and measurements (length, OD, ID, end-cap type) and we can produce a matching element.

Do you make custom sizes other than 20 inch?

Yes. We produce cartridge elements to order across a wide range of lengths and diameters.