Buna-N Nitril O RINGS

Buna-N Nitril O RINGS

Product number:KXT 1710N

Quick Overview: 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.

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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 compression set 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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