How do I verify an oil seal manufacturer in China?
Compare the legal seller, manufacturing address, relevant certificate scope and sample inspection records before approving a supplier. Confirm which operations are performed by the quoted factory.
Information to compare
- Business licence and seller name
- factory address and process list
- certificate number, scope and validity
- sample inspection report
Match the supplier to the production site
Request the registered company name, factory address and the legal entity issuing the quotation. Record which operations are performed at that site and which are subcontracted.
Ask for a sample inspection report tied to the proposed part and a description of batch identification. Agree how a factory visit or remote production review can be arranged before placing a production order.
Check that the purchase order, payment beneficiary and supporting documents identify the agreed contracting entity. Resolve differences in writing before payment.
Certification, parameters and delivery
Ask for current certificates relevant to the manufacturing site and your purchasing requirements. Verify the document number, scope and validity. Match inspection records to the part and lot specified in your order.
State the dimensions, compound requirements and operating conditions you need confirmed. Request separate sample and production schedules, including the approval trigger, dispatch date and destination. VKEFOT certification availability, MOQ and delivery dates must be confirmed in the quotation for your selected part.
Questions before ordering
How do I verify an oil seal manufacturer in China?
Compare the legal seller, manufacturing address, relevant certificate scope and sample inspection records before approving a supplier. Confirm which operations are performed by the quoted factory.
Which documents should I include in this enquiry?
Provide business licence and seller name; factory address and process list; certificate number, scope and validity; sample inspection report. Identify any missing information so it can be confirmed during quotation.
What certification, MOQ and lead time apply to a VKEFOT order?
Request the current documents and a written quotation for the selected part. Certificate scope and validity, order quantity, tooling, sampling and delivery commitments require confirmation for that order.
Material selection guide · Reference comparison
Prepare your enquiry
Edit the checklist and copy your completed requirements into the enquiry form. Download blank checklist provides the original template. Your edits stay in this page until you leave or reload it.
Continue your purchasing review
Plan your sealing project or wholesale order
Application and leakage review · Wholesale supply and replenishment