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Technolab DV040503 Aftermarket Air/Oil Separator Element, photo 1

Technolab DV040503 Aftermarket Air/Oil Separator Element

$187.40 USD
  • SKU: SPM-SEP-3551
  • Availability: in stock Many in stock Out of stock In-stock at manufacturer. Please add 5-10 days to shipping time
  • Weight: 11.5 kg (25.35 lb)
Keep a spare: buy 2 and the second one is 5% off ($178.03)
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Technolab DV040503, direct aftermarket replacement. Keltec KV420004 is an air/oil separator element. The same element is listed under 6 other numbers from Air Supply Co (ASC), Donaldson, Fai Filtri, Joy, Technolab and others, all in the cross reference table below.

The separator strips the fine oil mist out of the compressed air leaving the oil tank, so the oil stays in the compressor and the air going to the line is clean. 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 Air/Oil Separator Element
Replaces Keltec KV420004
Media Glass fibre coalescing
Outer Diameter 374 mm (14 3/4")
Flange Diameter 458 mm (18 1/16")
Height 380 mm (14 15/16")
Stat. HS-Code 842139
Country of Manufacture China
Cross references
Brand Code
Air Supply Co (ASC) 01151815
Donaldson P525757
Fai Filtri DFF-375380-0U
Joy 5431170045
Keltec KV420004
Spare Part Mart SPM-SEP-3551
Technolab DV040503
United Air Filter S138D0778

Price beat guarantee

We check what other aftermarket sellers charge for this same part. Their prices on the date we checked:

Seller Price Checked
Oxfil USD 234.25 20 Oct 2026
The Air Market USD 406.27 20 Oct 2026
Spare Part Mart USD 187.40 Today

Our price of USD 187.40 is 20% to 54% 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

Scheduled service
Change the separator at the hours in the compressor's service plan, usually together with the oil and the oil filter, and sooner if oil carry over or the separator pressure drop rises.

Breakdown spares
Keep one on the shelf so a loaded air/oil separator element does not stop the machine while parts are ordered.

Workshop and fleet stock
Workshops looking after several machines can stock this one element under any of its 7 part numbers.

Frequently asked questions

Is this a genuine Keltec KV420004?

No. It is an aftermarket air/oil separator element made to replace the Keltec KV420004. It is not made by or affiliated with Keltec, and the part number is used only to show what it replaces.

Will it fit my machine?

It replaces the element numbered Keltec KV420004 and the other numbers in the cross reference table. Check the number on the old element or in the machine's parts list.

When should I change the element?

Change the separator at the hours in the compressor's service plan, usually together with the oil and the oil filter, and sooner if oil carry over or the separator pressure drop rises.

How do I fit it?

Stop the compressor and let all the pressure out of the oil tank. Remove the old element, clean the sealing faces, fit the new element with its new gaskets and tighten evenly. Run the compressor and check for leaks.

Do you ship to my country?

Yes, we ship worldwide. Shipping is calculated at checkout, and every order is covered by our 30 day money back guarantee and price beat guarantee.

Images and data are used as a guide and are deemed reliable to Spare Part Mart. Product may appear differently (e.g. colour) but will be as per the specs above. All cross references are deemed reliable to our knowledge. We encourage you to double check before ordering.

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