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O-RING GUIDE

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cobalt327 View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote cobalt327 Quote  Post ReplyReply Direct Link To This Post Topic: O-RING GUIDE
    Posted: March-18-2017 at 8:08pm

The O-ring Store http://www.theoringstore.com/

 

O-rings and More http://www.oringsandmore.com/

 

Below are recommendations made by The O-ring Store.

If in doubt, let the exact application be the guide to what is used in each specific case.

 

N Buna-N

N Metric Buna-N

E EPDM

C Neoprene

S Silicone

V Viton

P Polyurethane

F Fluorosilicone

A Aflas

K FFKM (Isolast, Kalrez)

 

 

  

Best Choice

N

E

C

S

V

P

F

A

K

CARBON DIOXIDE

N

1

1

1

1

1

1

1

1

1

NITROGEN

N

1

1

1

1

1

1

1

X

1

HELIUM

N

1

1

1

1

1

1

1

X

1

AIR, 200° - 300° F

S

3

2

2

1

1

3

1

1

1

AIR, 300° - 400° F

S

4

4

4

1

1

4

2

2

1

AIR, 400° - 500° F

S

4

4

4

2

3

4

4

3

2

 

KEY:

1 Excellent (<10% Swell) 2 Good (static usually OK) 3 Poor (20-40% Swell) 4 Not Recommended X Insufficient Data

 

NOTE: I am not recommending the use of nitrogen or helium. It is listed here as a reference only. And NEVER even consider using oxygen!

 

Bottom line for using pressurized gasses- always refer to the manufacturer's recommendations as to what and how much.

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PappyWagner View Drop Down
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Post Options Post Options   Thanks (1) Thanks(1)   Quote PappyWagner Quote  Post ReplyReply Direct Link To This Post Posted: March-19-2017 at 12:32pm
Good info to have. Thanks
"Are you gonna pull those pistols or whistle Dixie ?"
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cobalt327 View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote cobalt327 Quote  Post ReplyReply Direct Link To This Post Posted: April-24-2017 at 10:08pm
Updated with a listing for helium. Please refer to "Note" in the post saying this is not a recommendation for Ni or He.
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