Case study: cross-referencing an obsolete compressor control part
A legacy part number with no current OEM listing was matched using drawings, nameplate data and dimensional checks before supply.
Obsolete parts rarely fail politely. A compressor control component had been out of production for years, the OEM listing was no longer current, and the plant could not afford to guess at a replacement. The only safe route was evidence-based cross-referencing.
The problem
The site supplied an old part number, a photograph and a partial drawing. The nameplate was worn, and no current catalogue entry matched the number exactly. Installing the wrong component risked poor control response, leakage or repeat downtime.
Verification steps
- Compared mounting dimensions, port sizes, travel and actuation type against the drawing.
- Checked the nameplate data and the surrounding assembly for configuration clues.
- Searched legacy catalogues and cross-reference tables for equivalent model families.
- Confirmed materials and pressure ratings with the customer before offering an alternative.
- Documented the evidence trail so the site could approve the replacement internally.
Result
A compatible replacement was identified and supplied with a clear cross-reference record. The customer retained the documentation for their maintenance file, and the plant avoided both a prolonged shutdown and an unverified substitution.
Have an obsolete part?
Send us the old part number, photos, nameplate details and any drawings you hold. AGO Aviation specialises in tracing legacy and obsolete gas turbine and industrial components through documented cross-referencing.
Frequently asked questions
What information helps identify an obsolete part?
Photos, nameplate details, drawings, dimensions, the parent assembly and any repair history all help. Even a partial part number can be useful.
Can you supply without an OEM part number?
In many cases yes, provided the form, fit and function can be verified from drawings, nameplate data or dimensional checks.
Need help with a part?
Send your part number and we will verify availability.
AGO Aviation supplies gas turbine, compressor, valve, automation, instrumentation and mechanical spare parts worldwide. Share a part number, drawing or nameplate photo and our team will respond with availability, lead time and pricing.