Rubber Gasket
Material Comparison: NBR vs FKM
style="color:#163b5c; font-size:28px; line-height:1.3; margin-bottom:10px; margin-left:0; margin-right:0; margin-top:0">Choose the Rubber Compound Before You Choose the Color
✅ Choose NBR： Your application involves general oil/grease service, temperatures under 100°C, and cost is a priority
✅ Choose FKM： You need high temperature resistance, aggressive chemical resistance, or long-term reliability in harsh environments
| NBR Gasket Rings | FKM Gasket Rings |
|---|---|
| Hydraulic & pneumatic systems | Oil & gas wellhead equipment |
| Automotive oil pans & transmissions | Chemical processing pumps & valves |
| Industrial pumps & valves | Semiconductor manufacturing equipment |
| General pipe flanges | Aerospace & aircraft systems |
| Lubrication systems | High-temperature automotive |
| Fuel systems (general) | Heavy-duty diesel engines |
A published material specification is only a general reference value. Actual service performance and life vary with operating fluid, concentration, temperature, pressure, compression ratio, flange surface finish, and installation method.
APPLICATIONS
Match The Gasket To The Flange And Service Condition
Pipe Flanges & Piping Pipeline flanges, manhole covers, tank nozzles and pipe joints. Confirm pressure rating, flange standard (ANSI/JIS/DIN) and gasket thickness.
Pumps and Valves Pump housings, valve bonnets, body gaskets and end covers. Match the fluid type, temperature and pressure cycle to the right material.
Automotive Engines Oil pans, valve covers, intake manifolds and transmission housings. Check oil/fuel compatibility and temperature cycling requirements.
Hydraulic Systems Cylinder end caps, manifold blocks, hydraulic power units and fittings. Verify fluid type, pressure rating and extrusion gap.
Chemical Processing Reactors, heat exchangers, storage tanks and process piping. Send the exact chemical name, concentration and operating temperature.
Food & Beverage Sanitary piping, filling machines, brewery equipment and dairy processing. Confirm food-grade certification (FDA/3A) and CIP compatibility.
RFQ CHECKLIST
Information Needed for Material Review and Quotation
1. Working fluid or chemical name
2. Fluid concentration
3. Continuous and peak temperature
4. Working and test pressure
5. Static, reciprocating or rotary use
6. Inside diameter and cross section
7. Groove drawing or equipment drawing
8. Hardness and tolerance
9. Approval or compliance requirement
10. Order quantity and annual demand
Size Alone Is Not Enough
ID × cross section identifies the basic part. It does not confirm material, hardness, pressure capability, dynamic suitability, or chemical resistance.
For an existing assembly, send the groove dimensions and failure condition. A flattened, swollen, cracked, hardened, cut, or extruded Gasket ring points to different corrections.
STANDARD AND CUSTOM SUPPLY
Control the Drawing, Compound and Inspection Method
Standard sizes conform to ANSI B16.21, DIN, JIS, and other flange matching specifications. Non-standard gaskets can be developed based on drawings, flange dimensions, or samples. For repeat orders, the confirmed rubber compound formula, drawing version, hardness, tolerances, inspection methods, and packaging labeling requirements are all locked within the same order file.
Application Review
Material Confirmation
Drawing or Sample
Sample Inspection
Batch Production
Compliance Must Match the Exact Compound
A certificate does not automatically cover every EPDM, silicone or NBR compound. Confirm the certificate holder, compound reference, hardness, color, intended contact condition and validity before placing a regulated order.
Review Certification InformationFAQ
Gasket Ordering Questions
How Do I Choose The Right Gasket Material?
Start with the fluid type, temperature range and pressure rating. NBR works for general oil and grease service, FKM for high temperature and aggressive chemicals, EPDM for water and outdoor use, and silicone for food-grade and wide-temperature applications. Send your application details for material recommendation.
What Dimensions Are Required For A Gasket Quotation?
Send the inside diameter (ID), outside diameter (OD) and thickness. For flange gaskets, include the flange standard (ANSI/DIN/JIS), pressure class and bolt hole pattern. A drawing or sample photo is always helpful.
What's The Difference Between Full-Face And Ring-Type Gaskets?
Full-face gaskets cover the entire flange face including bolt holes, used for lower pressure and flat face flanges. Ring-type (inner bolt circle) gaskets sit inside the bolt circle, used for higher pressure and raised face flanges. Choose based on your flange design.
Can You Produce Gaskets From My Drawing Or Sample?
Yes. Non-standard gaskets can be produced from confirmed drawings, flange specifications or approved samples. For sample-based orders, we recommend measuring multiple points and verifying the material type to avoid copying a worn or damaged dimension.
How Do I Know If My Gasket Is Failing?
Common signs include fluid leakage at the flange joint, gasket extrusion into the gap, hardening or cracking from heat aging, and swelling or softening from chemical attack. Check the compression set, surface condition and material changes during maintenance.
Send the Operating Conditions Before Requesting a Price
Include the fluid, temperature, pressure, motion, O-ring size or drawing, hardness, compliance requirement and order quantity. Clear application data reduces material changes, sample revisions and repeated quotation work.
Request Material Review and Quotation
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