Deltech DFD18, direct aftermarket replacement. Aftermarket replacement element for the Deltech DFD18, the grade DFD (dry particulate, 1 micron) element for size 18 Deltech compressed air line filters. It measures 42 mm (1-5/8 in) in diameter and 62 mm (2-7/16 in) high and is rated for about 37 scfm (60 Nm3/h) at 7 bar (100 psi).
This is the dry particulate element that stops desiccant dust and pipe scale down to 1 micron. It is usually fitted after a desiccant dryer, where the air is already dry and only dust needs to be caught. The DFD, PFD, HFD and CFD elements of size 18 share one housing size, so check the letters on the old element before ordering. Every element is checked against the part number before it ships, and every order is covered by our
30 day money back guarantee, worldwide delivery and
price beat guarantee.
Technical properties & cross references
Specifications
| Part Type |
Compressed air filter element |
| Replaces |
Deltech DFD18 |
| Element Size |
18 |
| Grade |
grade DFD (dry particulate, 1 micron) |
| Filtration |
Solid particles down to 1 micron (dust filter, no oil removal) |
| Outside Diameter |
42 mm (1-5/8 in) |
| Height |
62 mm (2-7/16 in) |
| Rated Flow |
37 scfm (60 Nm3/h) at 7 bar (100 psi) |
| Flow Direction |
Inside to outside |
| Max. Operating Pressure |
16 bar (232 psi) |
| Stat. HS-Code |
842139 |
| Country of Manufacture |
China |
Cross references
| Brand |
Code |
| Deltech |
DFD18 |
| Spare Part Mart |
SPM-INF-3830 |
Price beat guarantee
We check what other aftermarket sellers charge for this same part. Their prices on the date we checked:
| Seller |
Price |
Checked |
| eBay, aftermarket seller |
USD 51.58 |
7 Oct 2026 |
| The Air Market |
USD 59.74 |
22 Oct 2026 |
| Air Compressor Services |
USD 137.00 |
22 Oct 2026 |
| Spare Part Mart |
USD 41.26 |
Today |
Our price of USD 41.26 is 20% to 70% less than these sellers.
Found this part cheaper somewhere else? Send us the listing and we will beat it by 5% under our Price Beat Guarantee. Every order is also covered by our 30 day money back guarantee.
Use cases & applications
Annual element change
Change DFD, PFD and HFD elements at least once a year, or sooner when the pressure drop across the filter reaches about 350 mbar (5 psi). Change CFD carbon elements at least every 6 months.
After a desiccant dryer
The DFD element catches the fine desiccant dust a regenerative dryer sheds, so it does not reach valves, cylinders and instruments.
Workshop and plant air
Line filters sit after the compressor, receiver or dryer to keep water, oil and dirt out of air tools, valves and cylinders.
Frequently asked questions
Is this a genuine Deltech DFD18?
No. It is an aftermarket compressed air filter element made to replace the Deltech DFD18. It is not made by or affiliated with Deltech or SPX, and the part number is used only to show what it replaces.
Will it fit my filter?
It replaces the element marked DFD18. Check the code printed on the old element, or measure it: this one is 42 mm (1-5/8 in) in diameter and 62 mm (2-7/16 in) high. The letters give the grade (DFD dry particulate, PFD general purpose, HFD high efficiency, CFD carbon) and the number is the size.
When should I change the element?
Change DFD, PFD and HFD elements at least once a year, or sooner when the pressure drop across the filter reaches about 350 mbar (5 psi). Change CFD carbon elements at least every 6 months.
Which grade do I need?
Use the same letters as the element you are taking out. A typical line runs PFD then HFD after the compressor, CFD after that when oil vapour and odour must be removed, and DFD after a desiccant dryer to stop dust.
Should I change anything else at the same time?
Change the other elements in the same line at the same service, fit new O-rings if the old ones are flattened or cracked, and check that the drain on the filter bowl works.