Silicone O ring.

Abbreviation :silicone

ASTM D-2000 classification:FC,FE,CE

Military(Mil-Std417) :TA

Chemical Definition :polysiloxane

Durometer-Range (Shore A) :30-90

Tensile Range (P.S.I) :200-1500

Elongation (Max.%) :700

Compression Set:Good

Resilience- Rebound:Good

Abrasion Resistance:Fair to poor

Tear Resistance:poor

Solvent Resistance:poor

Oil Resistance:Fair to poor

Low Temperature Usage (°F:-60° to -150°

High Temperature Usage (°F) :450°

Aging Weather- Sunlight:Excellent

Adhesion To Metals:Good

Advantage:

1.after modulating formula, the tensile strength up to 1500 psi, and tear resistance up to 88 LBS.

2.Good elasticity and good compression deformation.

3.good resistance to neutral solvent.

4.excellent heat resistance.

5.With excellent cold resistance.

6.with excellent resistance to erosion of ozone and oxides .

Disadvantage:

1.Does not recommend is suitable for most concentrated solvent, oil, concentrated acid after dilute sodium hydroxide

Usage: 

Appliance:electric kettle,electric iron,Microwave owen,etc

Keypad,heat shock in DVD,cable connector

high quality soft colored o rings soft silicon rubber o ring    

Viton O ring.

Abbreviation :FKM

Common Name :Fluoro Elastomers

ASTM D-2000 classification:HK

Military(Mil-Std417) :MIL=R-25897/MIL-R-83248

Chemical Definition :Fluorinated Hydrocarbon

Durometer-Range (Shore A) :60-90

Tensile Range (P.S.I) :500-2000

Elongation (Max.%) :300

Compression Set:Good

Resilience-Rebound:Fair

Abrasion Resistance:Good

Tear Resistance:Good

Solvent Resistance:Excellent

Oil Resistance:Excellent

Low Temperature Usage (°F:+10° to -10°

High Temperature Usage (°F) :400° to 600° (depending on time and service condition)

Aging Weather- Sunlight:Excellent

Adhesion To Metals:Good

Advantage:

1. Heat resistance up to 600°F

2. Resistance to wide range of oils and solvents; specially all aliphatic, aromatic and halogenated hydrocarbons, acids, animal and vegetable oils.

Disadvantage:

1. Not recommended for ketones, low molecular weight esters and nitro containing compounds.

Usage:

Automobile,motorcycle,diesel engine,and fuel system 

NBR O ring.

Abbreviation: NBR

Common Name:Buna N, Nitrile, NBR

Chemical Definition:Butadiene Acrylonitrile

General Characteristics:Waterproof,oilproof

Durometer-Range (Shore A):20-95

Tensile Range (P.S.I):200-3000

Elongation (Max.%):600

Compression Set:Good

Resilience-Rebound:Good

Abrasion Resistance:Excellent

Tear Resistance:Good

Solvent Resistance:Good to Excellent

Oil Resistance:Good to Excellent

Low Temperature Usage (°F):-30° to - 40°

High Temperature Usage (°F):to 250°

Aging Weather-Sunlight:Poor

Adhesion To Metals:Good to Excellent

Usual Hardness range:50-90 shore A

Advantage:

1. Has good solvent, oil, water and hydraulic fluid resistance.

2. Good compression set, abrasion resistance and tensile strength. 

Disadvantage:

1. Not recommended for using in highly polar solvents such as acetone, and MEK, ozone, chlorinated hydrocarbons and nitro hydrocarbons.

Usage: fuel tank, grease-box, hydraulic, gasoline, water, silicone oil, etc