Buna-N Nitril O RINGS

Buna-N Nitril O RINGS

Buna O-rings, NBR or Nitrile O-rings offer excellent sealing properties and mechanical properties with low cost. Buna and Nitrile O-rings have a basic resistance to common lubricants and are recommended for crude oil, gasoline, propane, petroleum oils and water. Nitrile and Buna O-rings are used in engines, gearboxes, aircraft pumps, and common water applications.

Model:KXT 1710N

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Product Description

NBR Nitrile Buna-N O-Rings Seals Gaskets

Buna O-rings, NBR or Nitrile O-rings offer excellent sealing properties and mechanical properties with low cost. Buna and Nitrile O-rings have

a basic resistance to common lubricants and are recommended for crude oil, gasoline, propane, petroleum oils and water.  Nitrile and Buna

O-rings are used in engines, gearboxes, aircraft pumps, and common water applications.

 

Nitrile Buna-N NBR O-Rings are used as a face-to-face or shaft seals, and allow rotary and linear movement. Nitrile O-rings have good tear

and abrasion resistance with operating temperature: -30° to +250F° (can be increased to higher temperature sealing in special compounds).

 

Note: Nitrile / Buna / NBR o-rings do have limitations to ozone, sunlight and weathering.  They are also not good in strong acids, aircraft or

automobile brake systems, or ketones.

 

Advantages

• Good resitance to Petroleum greases, mineral oils, vegetable oils

• Good chemical compatibility and resistance

• Good abrasion and wear resistance

• 

• Good Permeation Resistance

• Good oil resistance., etc

 

Application

• Dilute acids, alkali and salt solutions at low temperature

• Petroleum base oils and fluids, mineral oils,

• Silicone greases, di-ester base lubricants

• HFA, HFB and HFC hydraulic fluids

• Ethylene glycol base fluids

• Chemical resistace

• Water., etc

 

NBR Properties

Item

Viton/FKM

Test Method

Color

Black


Specific gravity

1.35/cm3

ASTM D297

Hardness

40°-95° Shore A

ASTM D2240

Tensile strength

9 MPa (min)

ASTM D412

Elongation at break

350% (min)

ASTM D412

Size

Varies


Compression set 100°C 22 hrs

13-25%

ASTM D 395B

Tear resistance

25 kg/cm (min)

ASTM D624

Temperature range

-25°C to +120°C


 

Kinds of Rubber Properties

Common name

Neoprene

EPDM

Nitrile

Silicone

Viton

Kalrez

Chemical Compatibility

Lubricating and Fuel Oils

X

X

Hydraulic Oils

X

Fireproof Hydraulic Fluids

X

Vegetable Oils, Animal Fats

Gasoline (high octane)  X X X
Kerosene X X
Aromatic Hydrocarbons X X X X
Aliphatic Hydrocarbons X X
Alcohols
Ketones X X X X
Halogenated Solvents X X X X
Water (>80°C)
Concentrated Acids X X X X
Diluted Acids  X X
Alkalis X

Properties

Max. Continuous temp °C 105 150 121 204 204 316
Low Temperature °C –50 –54 –25 –85 to –125 –8 to -30 –8
Tensile Strength, MPa 25 17 27 10 20 15
Hardness Shore A 30–95 40–90 40–95 30–90 55–95 65-95

Key:  = Excellent ,  = Good,  = Fair, X = Not Recommended

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