How should I compare NBR and FKM oil seals for my application?

Compare the specified compound against the actual fluid, continuous and peak temperatures, shaft speed and seal design. A material family name alone does not establish an operating limit for a finished seal.

Information to compare

• Compound designation
• fluid and additives
• temperature cycle
• shaft speed
• pressure
• material compatibility evidence

Compare the proposed compound against the duty cycle

Give the supplier the fluid name and additives, continuous and peak temperature, shaft speed, pressure and start-stop cycle. Ask for the exact proposed compound designation and supporting compatibility information.

Compare the complete seal design, including lip geometry, spring and case materials, as well as the elastomer. Record any changes to installation or shaft requirements in the quotation.

Agree the test fluid, operating cycle and acceptance criteria for application trials. Obtain written confirmation of operating limits for the proposed finished part before approving substitution.

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.

Material selection guide · Reference comparison