FS-Curtis & Chicago Pneumatic Separator and Filter Part Numbers: Lookup Guide

FS-Curtis and Chicago Pneumatic rotary screw compressors are common in shops of every size, but neither brand gets much attention when it’s time to find a replacement separator, air filter, or oil filter. The part number is still the fastest way to the right part. The trick is knowing how each brand writes its numbers, because a dash, a space, or a dropped digit can make a search come up empty.

This guide shows how FS-Curtis and Chicago Pneumatic separator and filter part numbers are written, where to find yours, and how to order the matching KELTEC OEM equivalent from Compressor Filter Hub.

How FS-Curtis Part Numbers Are Written

FS-Curtis uses several formats, and you may see more than one on the same machine:

• Five digits, a dash, and three more: 91101-020, 91108-012, 91111-003, 94203-410. This is the most common format for separators and air filters.
• Seven digits: 1260004, 1450322, 1485174. Common on smaller air and oil filters.
• Nine or ten digits: 200950121, 201250111, 2116010022, 2116040080. Type every digit, including the zeros in the middle.
• Letter prefixes: RN24030-1 and similar air filter numbers. Keep the RN and the dash suffix.

Different FS-Curtis Numbers, Same KELTEC Element

FS-Curtis has more than one number for some separators. On our product pages, these pairs list the same KELTEC equivalent:

• 91101-020 and 200950121 (both KELTEC KV150-019)
• 91101-040 and 201250111 (both KELTEC KV210-019)
• 1485174 and 2116020014 oil filters (both KELTEC KL105-045)

So if your manual shows one number and the old part shows another, both may lead to the same replacement. Search the number on your old part first, then check the KELTEC number on the product page.

Popular FS-Curtis Air/Oil Separators

Each link goes to the KELTEC OEM equivalent product page, where the FS-Curtis number and the KELTEC number are listed together.

Popular FS-Curtis Air Filters and Oil Filters

How Chicago Pneumatic Part Numbers Are Written

Chicago Pneumatic numbers come in three main styles:

• Ten digits in a 4-4-2 pattern: 2205-4065-04, 2236-1060-30, 6211-4725-50. Manuals often print these with spaces (2205 4065 04), and invoices sometimes run them together (2205406504).
• Dotted numbers: 1028.6192.50. The dots are just separators, so 1028619250 is the same number.
• PS numbers: 1PS6524, 15PS2690, 51PS3072. These are often written with a dash or space, like 15PS-2690. Keep the digits in front of the PS. They’re part of the number.

The last two digits of a 4-4-2 number matter. 2205-4065-04, 2205-4065-06, and 2205-4065-12 are three different separators with three different KELTEC equivalents, so copy the full number exactly.

Popular Chicago Pneumatic Air/Oil Separators

Popular Chicago Pneumatic Air Filters, Oil Filters, and Kits

Need a different number? Browse all air/oil separators, air intake filters, oil filters, and maintenance kits, or search your number in the store search bar.

Where to Find the Part Number on Your Compressor

1. The old element. Separators, air filters, and spin-on oil filters usually have the number on the label, end cap, or can. Take a photo before you throw it out.
2. Your service manual or parts list. The maintenance parts page lists the separator, air filter, and oil filter for your model.
3. Past invoices. Useful, but watch for dropped zeros or suffixes.
4. The nameplate. If the old part is unreadable, send us the model and serial number from the compressor nameplate and we’ll help you find the right part number.

Tips for Searching an FS-Curtis or Chicago Pneumatic Number

• Search the full number first, with its dashes (91101-020, 2205-4065-04).
• If that comes up empty, try it without dashes or spaces (91101020, 2205406504), or the other way around.
• For dotted Chicago Pneumatic numbers, try the number without dots (1028619250).
• Check the part type in the product title. A spin-on separator and a separator element are different parts.
• Searching by model won’t bring up a part. Send us the model and serial number instead and we’ll look it up.

Change the Separator, Oil Filter, and Air Filter Together

On an oil-flooded rotary screw compressor, the air filter keeps dust out, the oil filter keeps the oil clean, and the separator keeps that oil out of your air system. When one is overdue, the others work harder, so many shops replace all three at the same service. See when and how often to replace compressor filters, and if you’re seeing oil downstream, read how to tell if oil in your air lines is the separator. For line filters, our coalescing filter element cross reference covers the major filtration brands, and you can browse all coalescing filters.

Frequently Asked Questions

Are FS-Curtis 91101-020 and 200950121 the same separator?
On our product pages, both list KELTEC KV150-019 as the equivalent. If you have either number, you can order from that page. If you’re unsure, send us a photo of the old part.

Does it matter if I type 15PS2690 or 15PS-2690?
Not for this part. Both formats are listed on our site with KELTEC KC200-018K. Some PS numbers are listed more than once, though, so if two listings for what looks like the same number show different KELTEC numbers, contact us before you order.

What is a KELTEC OEM equivalent?
KELTEC Technolab builds replacement elements to match the fit, form, and function of the original part. Every product page lists the OEM number it replaces and the matching KELTEC number. For more, read OEM vs OEM equivalent filters.

I only know my compressor model. Can you help?
Yes. Send us the model and serial number from the nameplate, plus photos of the old parts if you have them, and we’ll find the right separator and filters.

Get the Right FS-Curtis or Chicago Pneumatic Part the First Time

Have your part number? Click it in the tables above or search it in our store.

Can’t find your number? Email info@compressorfilterhub.com or contact us with your compressor model and the number off your old part (or a photo of it). We’ll match it and send you a link to order.