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Pneuma-Seal Materials
Pneuma-Seal is available in a wide variety of materials as noted below, although the specific elastomers vary somewhat from one profile to another. If required, cross sections can be custom made using materials other than those indicated in this manual. Please note that the ratings given to the properties of the elastomers are based on Pawling compounds as they are applied to inflatable seals. The ratings of other manufacturers may differ as the result of compounding variables and end product use. Also note that the addition of fabric reinforcing overcomes drawbacks associated with some of the relatively poor physical characteristics of silicone, fluorosilicone, fluorocarbon rubber, and nitrile.
| O = Outstanding | E = Excellent | VG = Very Good | G = Good | F = Fair | P= Poor |
©2006 Pawling Corporation, Engineered
Products Division
157 Charles Colman Blvd. Pawling, NY 12564-1193 USA
(845) 855-1000 | (800) 431-0101 | Fax: (845) 855-1139 USA
West Coast: (949) 475-9842 | Fax: (949) 475-9859
epdinfo@pawling.com
Site Development & Design: Greener Pastures Design & Illustration
ASTM Designation |
EP |
CR |
NBR |
NR |
IIR |
VMQ |
FVMQ |
FKM |
|
Tensile Strength |
>2000 |
>2000 |
>2000 |
>2000 |
>2000 |
>1200 |
>1200 |
>1400 |
|
Hardness Range |
40-90 |
20-80 |
50-95 |
50-70 |
40-75 |
40-80 |
40-70 |
70-90 |
|
Tear Resistance |
G |
G |
F |
G |
G |
F |
P |
F |
|
Abrasion Resistance |
G to E |
VG |
G |
E |
G |
P |
F |
G |
|
Compression Set |
G |
G |
G |
E |
F |
VG |
E |
E |
|
Resilience Cold |
G |
G |
G |
G |
P |
E |
G |
F |
|
Resilience Hot |
VG |
VG |
G |
F |
VG |
E |
E |
E |
|
Radiation Resistance |
O |
G |
P |
F to G |
G |
G |
E |
E |
|
Impermeability to Gases |
G |
G |
G |
F |
O |
F |
E |
P |
 |
||||||||
|
Acid Resistance |
||||||||
|
Mild Dilute |
E |
E |
F to G |
F to P |
E |
E |
E |
O |
|
Strong Concentrate |
G |
G |
F to G |
P |
G |
F |
G |
E |
|
||||||||
|
Solvent Resistance |
||||||||
|
Aliphatic Hydrocarbons |
P |
F to G |
E |
P |
P |
P |
G |
E |
|
Aromatic Hydrocarbons |
P |
P |
P |
P |
P |
P |
E |
E |
|
Oxygenated (Ketones, etc) |
G |
P |
P |
P |
G |
P |
F |
F |
|
||||||||
|
Resistance To: |
||||||||
|
Swelling in Lubricating Oil |
P |
G |
VG |
P |
P |
P |
E |
O |
|
Oil and Gasoline |
P |
G |
E |
P |
P |
F |
G |
E |
|
Animal Oils |
F |
F |
E |
P |
F |
G |
E |
E |
|
Water Absorption |
VG |
G |
VG |
VG |
VG |
E |
E |
E |
|
Oxidation |
E |
VG |
G |
F to P |
E |
E |
O |
G |
|
Ozone |
O |
VG |
F |
F to P |
F to G |
E |
O |
E |
|
Sunlight Aging |
O |
VG |
P |
F to P |
VG |
E |
E |
G |
|
Heat Aging |
VG |
G |
G |
G to F |
G |
O |
E |
E |
|
Low Temperature |
VG |
G |
F to G |
G |
G |
O |
G |
F |
|
Flame |
P |
G |
P |
P |
P |
F |
E |
E |
|
Vegetable Oils |
F |
G |
G |
P |
F |
P |
E |
E |
|
Chlorinated
|
P |
P |
F |
P |
P |
P to F |
F |
G |
| Common Name— Base Polymer |
EDPM or EP Rubber |
Neoprene | Nitrile or |
Natural Rubber |
Butyl | Silicone | Fluoro- silicone |
Fluoro- carbon |
|
||||||||
| Chemical Name | Ethylene |
Chloroprene | Acrylonitrile Butadiene |
Natural Isoprene |
Isobutylene Isoprene |
Silicone | Fluoro- silicone |
Fluoro- carbon |
