Qinghe Yinghui Filter

OEM filter procurement: from RFQ to first article

OEM

OEM procurement runs from a clear RFQ — OE number, drawing, quantity, target grade and packaging — through sampling, first-article inspection against the OE drawing, and then serial production. The catalogue cross-reference is the discovery step; the drawing and first article are what lock the fitment.

The RFQ carries the fitment

A useful RFQ states the OE number, the equipment make/model/year, a drawing or sample, the target quantity and the efficiency or media requirement. The more of this arrives up front, the faster a supplier can quote accurately. Missing the drawing is the most common cause of a wrong first sample.

First article against the OE drawing

Before serial production, request a first-article sample and check it against the OE drawing — dimensions, end-cap or seal type, and media. The catalogue cross-reference links a part to an OE number but does not confirm the dimensional match, so the first article is the real verification step.

Serial production, packaging and lead time

After the first article is approved, agree on MOQ, packaging, marking and lead time. Standard sizes ship faster; custom sizes add lead time. Confirm whether private-label packaging and neutral marking are required, and put the approved sample on file as the reference for every subsequent batch.

From a sourcing perspective

From a sourcing perspective, our advice is to put the drawing and the first article at the centre of the process, because the catalogue cross-reference only links a part to an OE number — it does not confirm the dimensional match. We recommend carrying the OE number, the equipment make/model/year, a drawing or sample, the target quantity and the media requirement in the RFQ, since missing the drawing is the most common cause of a wrong first sample. In our experience, the first-article check against the OE drawing is the step that converts a cross-reference into a verified fitment.

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