The Difference Between NBR Seal and FKM Seal of the Bearing-NEWS-FV BEARING INDUSTRIES
Loading...

The Difference Between NBR Seal and FKM Seal of the Bearing

Sep 08, 2021

The NBR and FKM are the commen bearing sealing ring material. 

The differences are as follows:

1. Heat resistance


FKM seal: FKM sealing ring heat resistance characteristics and silica gel, can be said to be the stage of vulcanized rubber polyurethane elastomer stronger, the basic type of fluorine rubber number FKM or FPM, its product output can be long-term in 200℃ application, and perfluoroether vulcanized rubber FKM high can continue to be applied at 330℃.


NBR seal: higher 100℃ application, from the heat resistance of NBR sealing ring.



2. Physical performance


FKM seal: FKM seal has high quality physical and physical properties, has advantages in elastic compressive strength and tensile elongation level.

NBR seal: NBR seal has excellent physical reflectivity and production characteristics.


3. Reliability


FKM seal: FKM seal has smooth organic chemical characteristics, it is also at the present stage of all vulcanized rubber polyurethane elastomers in a variety of substances with stronger characteristics. Fluorine rubber oil resistant silicon ether, magnesium chloride oil, crude oil, base oil, double ester oil, resistant to most of the organic chemistry, inorganic organic solvent, resistance to strong oxidizer, drugs, etc., in which fluorine rubber resistance of the material not only to the following categories: low substructure of the ether, ester, ketone, and all of the ammonia, amines, chlorosulfonic acid, hydrochloric acid, ammonium sulfate type of gear oil.

NBR seal: poor cold resistance, poor resistance to reactive oxygen species, poor dielectric strength, low ductility.


4. Anti-aging characteristics


FKM seal: FKM seal has good resistance to weather embrittlement and reactive oxygen species. The yield of fluoro glue products is still satisfactory after five years of storage.

NBR seal: NBR seal anti-aging performance of is a little poor, general nitrile rubber product output can be stored for ten years.


5. Ultra-low temperature characteristics


FKM seal: because the organic chemical structure of FKM itself causes the cold resistance of FKM is not very excellent.

In the specific application of fluorine rubber ultra-low temperature characteristics are also general, unless the addition of a unique preservative can make fluorine rubber cold do minus 30 degrees, otherwise the general fluorine rubber only do minus 10 degrees.

NBR seal:Generally NBR adhesives can be cold resistant -30℃, and with extremely super cold resistance nitrile adhesives can be cold resistant -50℃.


Therefore, in the selection of sealing, it should be decided according to the working condition of the bearing.


A Leading Industrial Bearings Supplier

Why Choose FV Bearings?

FV Bearing is a leading supplier of precision bearings and bearings related products across a large spectrum of customers – preimarily OEMs and major distributors.

Leading industrial ball bearings with best materials

Accurate response to client’s request

FV Bearings Co.Ltd has rich experiences in bearings manufacturing and processing, the professional bearing engineers can handle your requirements on bearings exactly and output the accurate bearing products.

World’s leading roller bearings manufacturer

FV Bearings is a leading roller bearings manufacturer provides high quality and durable roller bearings for different industries such as automotive, aerospace, machinery, power plants, chemistry industry, agriculture and other fields.

Solutions for special bearings and high end bearings

If you are looking for special bearings and high end bearings, FV bearings can help you to customize any special bearings according to your needs based on advanced bearings manufacturing technology.

Send us an Email for Quote

sales@fv-bearing.com

Start your project and business
with FV Bearings!

Advanced Industrial Bearing Technology

Latest Bearings News & Knowledge

News and knowledge about ball bearings, roller bearings, special bearings,
deep groove ball bearings, and thrust roller bearings

TQOK series rolling mill bearings - Tabl...

The technical engineer of FV sorted out the old original Torrington model and parameter table. If users are still using Torringt* bearings and there i...

TQO series rolling mill bearings - Table...

The original Torrington four row tapered roller bearing, type TQO, is an extremely high capacity bearing designed primarily for heavy duty roll neck a...

FV manufactures and exports 28'' heavy d...

Model:SDE28 A-2 WORM GEAR SLEWING DRIVE.They will be used in the field of drilling. The reduction ratio is 110:1. It is a rotary table bearing with se...

Get a Quote

Customize Your Bearings
For Your Project

Describe your needs such as bearing type and bearing code, or parameter.

Get a Quote from FV Bearings

Get the latest bearings price lsit from FV bearings. We’ll reply within 48 hrs