Troubleshooting
Cross-reference without guesswork: how we verify fitment before quoting
A compressor filter cross reference only works if fitment is verified. See the exact checks we run on thread, bypass pressure and seals before quoting.
Most compressor filter inquiries start with two lines of information: a machine model and an old part number. What happens between receiving that information and sending a quote determines whether the part that arrives bolts in and seals, or comes back as a complaint. Here is exactly how we run that verification, so you know what we check and what we need from you.
Why a filter that looks the same often is not
Two separator or filter cartridges can share an outer diameter, a color, and even a thread, and still be different parts. The thread pitch can differ by a fraction of a millimeter, the sealing face can sit at a different height, and the bypass valve can be set to open at a different pressure. A part that is wrong in any of these will either not install, install and leak, or install quietly and then disturb the oil system in ways that show up months later.
This is why we do not quote from photos of the outside of a filter alone, and why fitment is checked before quoting rather than after shipping.
What we check on every inquiry
For separators and oil filters, the verification covers the thread, the bypass valve opening pressure, and the sealing surface dimensions, followed by the media specification and the flow the element is rated for. For air filters, the checks come down to dimensions, end-cap configuration, and media grade. Our range covers 3000+ standard parts for screw and piston compressors, so most cross-references resolve against parts we already know; when they do not, we move to drawings or samples.
For a separator, the two details that commonly fail silently are the bypass valve opening pressure and the height of the sealing face, because a part can be installed and appear to run fine while those two are wrong. That is also why our first reply to an incomplete inquiry is a question, not a price.
What to send us for a clean cross-reference
A clean inquiry contains three things: the compressor brand and model from the nameplate, the old part number if it is readable, and the quantity and consumption you expect. If the part number is worn off, photos of the nameplate and the old element, plus a tape measure across diameter, height, and sealing face, give us a solid starting point. Customers who run mixed fleets, for example an Atlas Copco GA22 alongside Ingersoll Rand and Hitachi units, can send one consolidated list and receive the full cross-reference in a single quote.
What comes back with the quote
Quotes normally go out within one working day and include packing information, because for an export buyer the box is part of the cost: carton dimensions and units per carton determine the freight you will pay. Minimum order quantity is one piece, trial orders and mixed batches are accepted, and consumables can be stocked against your maintenance cycle, which for most operations settles into a three-to-six-month repurchase rhythm.
We are online 24/7, so an inquiry sent outside Chinese business hours is still picked up; the reply usually lands within one working day once your part information is complete.
A pre-inquiry checklist for buyers
Before you send the inquiry, work through six items: photograph the compressor nameplate; read the old part number off the element or its box; measure outer diameter, height, and sealing face if the number is gone; note the thread on the mounting; record the approximate annual usage; and list any deadline the shipment has to meet. An inquiry with those six items usually gets a verified quote in one working day. An inquiry that says 'filter for Atlas Copco' starts a conversation instead of a quotation.
When the standard cross-reference is not enough
The range is broad, but some needs fall outside it: special working conditions, or assemblies that combine several filters. For those cases we build custom parts and assemblies, still verified against the drawing or the sample you provide. The verification process is the same either way; only the source of the specification changes.
Email the compressor model and old part number to sales@keli-parts.com or message WhatsApp +86 15757463901; we will check fitment first and reply with a quote, packing included, within one working day.
