Oil Seals for Valve Stem

Low resistance to hydrocarbon fluids like gasoline or paraffin fluids or steam above to 50 psi.

Broad temperature range.
Good ozone resistance
Resistant to compression set.

SILICONE

Poor resistance to ozone and weather aging.

Commonly referred to as Buna-N or NBR and is copolymer of Butadiene and Acryonitrile.
Good resistance to petroleum oils, water, silicone oil, greases, glycol base fluids.
Good abrasion resistance, cold flow, tear resistance.

NITRILE

Poor cold temperature limit, dry running ability, water resistance.
Lower mechanical strength.

Polymerised acrylic acidesters or PA and ACM.
Good resistance to mineral oil, hypoid gear oil E.P. additive, greases, aging and flex cracking.

POLYACRYLATE

Fair resistance to water, dry running.
Low temperature resistance is fair.

Good temperature resistance.
Commonly chosen as high temperature replacement for Nitrile or Polyacrylate.

FLUOROELASTOMER

Disadvantage

Advantage

 

TABLE 2

* maximum temperature limits depend on other operating conditions.

2HK710A110B38

2GE8O7A19B37
EO16EO36G11

SDH710A26B16
B36EO16EO36

2BG715B14B34E014
EO34EF11EF21

ASTM D2000 Spec.

E

E

E

G

Ozone Resistance

E

G

E

E

Wear Resistance

F

E

F

G

Cold Resistance

E

E

E

G

Heat Resistance

G

G

F

G

Water Resisitance

F

X

X

G

Alkali Resisitance

E

F

F

G

Acid Resistance

E

G

E

E

Oil Resistance

-30 F ~ 400 F
(-35 C ~ 200 C)

-80 F ~ 400 F
(-60 C ~ 200 C)

-20 F ~ 300 F
(-30 C ~ 150 C)

-40 F ~ 250 F
(-35 C ~ 120 C)

Temperature Range *

V

S

P

N

Material Code

FLUOROELASTOMER

SILICONE

POLYACRYLATE

NITRILE

BASE POLYMER

 TABLE 1

 

In order to satisfy various sealing conditions, EPM has many compounds
available for your choice.

The most important component of an oil seal is the clastomer material.
To consider the environmental conditions, the following properties
are important:

• Viton Oil Seal

and Rubber Oil seal series

Valve stem Oil seal

Valve oil seal
Applications: Automobile
Material:NBR,Viton.
OEM/Customized specificationS
Right Price with Right Delivery;