Ingersoll Rand Separator & Filter Part Numbers: Lookup Guide (Including IR Line Filter Elements)
Ingersoll Rand rotary screw compressors are everywhere, from small shop units to big plant air systems. When the separator or a filter is due, the part itself is a quick swap. What slows people down is pinning down the exact part number and finding a replacement that’s actually in stock without paying dealer pricing.
This guide covers how Ingersoll Rand part numbers are written, where to find yours on the machine, and how to order the matching KELTEC OEM equivalent for your separator, oil filter, air filter, or line filter element from Compressor Filter Hub.
How Ingersoll Rand Part Numbers Are Written
The good news: most Ingersoll Rand compressor part numbers are simpler than other brands. Many are a plain 8-digit number with no spaces or dashes. A few have letters or a dash built in, and those are the ones that trip up a search:
- Plain numbers, like the separator 35779479. Type it exactly as printed.
- Letter prefixes, like ZS1212836, W94411, or W138331. The letters are part of the number. Leave them off and you’re searching for a different part.
- Line filter element codes, like IRP25. The letters set the element type and the number is the size. IRP25, IRP47, and IRP65 are different elements, so match the size exactly.
- Dashed codes, like NLM-2E. On paperwork you may see it with or without the dash (NLM2E). Same part either way.
Our product titles use the format shown on the original part, so searching the number exactly as printed on your element is the most reliable way to find it. Or skip the search and use the direct links in the table below.
Where to Find the Part Number on Your Compressor
Before you order, get the number for the exact element in your machine. The best places to look:
- The old element itself. Most separators, spin-on oil filters, and air filter elements carry a printed number or label. Snap a photo before you pull it.
- The parts list in your operator’s manual. Ingersoll Rand manuals list the service parts for your model and serial range.
- Your last service invoice or PM kit. If a tech did your last service, the part numbers are usually on the paperwork.
- The nameplate. Write down the model and serial number. If you can’t find a part number anywhere else, that’s what we need to help you look it up.
Part numbers can change over the life of a model, so the number on your old element is the safest starting point. If it doesn’t match your manual, send us both and we’ll sort it out.
Popular Ingersoll Rand Separators and Filters We Stock
These are some of the Ingersoll Rand part numbers we carry. Each one links straight to the KELTEC OEM equivalent product page, where you’ll see the OEM number and the matching KELTEC number side by side.
| Ingersoll Rand Part # | Search It As | KELTEC Equivalent # | Part Type | Shop |
|---|---|---|---|---|
| 35779479 | 35779479 | KH175-006 | Air/oil separator | View 35779479 |
| ZS1212836 | ZS1212836 (letters included) | KV200-084 | Air/oil separator | View ZS1212836 |
| W94411 | W94411 (letter included) | KL685-002 | Oil filter element | View W94411 |
| W138331 | W138331 (letter included) | KA300-018 | Air filter element | View W138331 |
| IRP25 | IRP25 | KPDE850-X1 | Coalescing line filter element | View IRP25 |
| NLM-2E | NLM-2E / NLM2E | KD400-031 | Air/oil separator | View NLM-2E |
Need a different number? Our Ingersoll Rand collection has more than 1,900 KELTEC OEM equivalent products, including separators, air and oil filter elements, and line filter elements. Browse the full Ingersoll Rand filters & separators collection.
Separator, Oil Filter, and Air Filter: Keep Them on One Schedule
On an oil-flooded rotary screw compressor, the intake filter, oil filter, and air/oil separator work together. A clogged intake filter makes the whole machine work harder, a tired oil filter lets contaminants circulate, and a worn separator lets oil carry over into your air lines. A lot of shops change all three at the same service so there’s one shutdown and one order.
- Watch the separator pressure drop and your oil consumption. Rising numbers mean the separator is loading up.
- Check the intake filter more often in dusty shops.
- Keep the next set on the shelf so a due date doesn’t turn into downtime.
For typical intervals, see our guide on how often to replace intake, oil, and separator filters. Doing the swap yourself? Our separator replacement walkthrough covers it step by step.
Ingersoll Rand Line Filter Elements (IRP Series)
Downstream of the compressor, your compressed air line filters have their own replacement elements. On Ingersoll Rand systems you’ll see codes like the IRP series, where the number after IRP is the size. For example:
- Ingersoll Rand IRP25 coalescing element (KELTEC KPDE850-X1)
The IRP line also includes sizes such as IRP47, IRP65, IRP110, and up. Each size is its own element, so a single digit off means it won’t fit your housing.
Read the code off the old element or the housing label and match it exactly. You’ll find more sizes in the Ingersoll Rand collection and in our coalescing filters section.
Quick Checklist Before You Order
- Confirm the part number from the old element or the manual, not from memory.
- Keep any letters in the number. ZS1212836 and W94411 need the letters to find the right part.
- Match line filter sizes exactly. IRP25 is not IRP47.
- Note your compressor model and serial number in case we need to double-check.
- Order the separator, oil filter, and air filter together if they’re due at the same interval.
Frequently Asked Questions
Is “NLM-2E” the same as “NLM2E”?
Yes. The dash is just formatting. The letters and numbers are what identify the part.
What is a KELTEC OEM equivalent?
KELTEC Technolab makes replacement separators and filters built to match the fit, form, and function of the original part. Every product page lists the Ingersoll Rand number it replaces and the matching KELTEC number. For more, read OEM vs OEM equivalent filters and how KELTEC Technolab parts extend life for Ingersoll Rand compressors.
I only know my compressor model. Can you find the part?
Yes. Send us the model, serial number, and a photo of the old element if you have one, and we’ll help you match it.
Get the Right Ingersoll Rand Part the First Time
Have your part number? Click it in the table above or browse our Ingersoll Rand filters & separators. Every order ships free.
Can’t find your number? Email info@compressorfilterhub.com or contact us with your compressor model, serial number, and the number off your old element (or a photo of it). We’ll match it and send you a link to order.