Elastomer Qualities Selection Table
	Synthetic	Natural Pure	Chloro-	Nitrile	Chloro-	Fluoro-	Chloro-	Ethylene
Elastomer Quality	Natural	Pure Gum	Butyl	Rubber	prene	Carbon	Sulfonated	Propylene	Elastomer Quality
	Rubber	Rubber	Rubber		Rubber	Rubber	Polyethylene
Designation	NR	PGR	IIR	NBR	N	FPM	CSM	EPDM	Designation
Tradename				Buna-N	Neoprene	Viton®	Hypalon®	Nordel®	Tradename
Properties									Properties
Temperature of application:									Temperature of application:
-  Maximum degree F	180	225	250	250	225	250	250	250	-   Maximum degree F
-   Maximum degree C	80	105	120	120	105	120	120	120	-     Maximum degree C
-  Cont. Operating Temp. F	140-150	160-180	200-210	200-210	200-210	200-210	200-210	200-210	-   Cont. Operating Temp.
-   Cont. Operating Temp. C	60-65	40-80	93-99	93-99	93-99	93-99	93-99	93-99	-     Cont. Operating Temp.
-  Minimum degree F	-60	-75	-60	-40	-40	-10	-40	-60	-   Minimum degree F
-   Minimum degree C	-50	-60	-50	-40	-40	-23	-40	-50	-     Minimum degree C
Resilience or Rebound Rating	Excellent	Excellent	Poor to Fair	Good	Fair-Very Good (Cold)	Fair-Good (Cold)	Fair-Good (Cold)	Fair to Very Good	Resilience or Rebound Rating
					Very Good (Hot)	Good-Excellent (Hot)	Good (Hot)
Compression Set Rating	Excellent	Excellent	Poor-Good	Good-Excellent	Poor-Good	Good-Excellent	Poor-Fair	Poor-Good	Compression Set Rating
Resistance									Resistance
-   Weather & Ozone	Poor-Fair	Poor-Fair	Excellent	Poor-Fair	Very Good-Excellent	Excellent-Outstanding	Excellent-Outstanding	Good-Excellent	-   Weather & Ozone
-   Acids - dilute	Fair-Good	Good-Excellent	Good-Excellent	Good	Excellent	Good-Excellent	Excellent	Excellent	-   Acids - dilute
-   Acids - concentrated	Poor-Good	Fair-Good	Fair-Excellent	Fair-Good	Poor	Good-Excellent	Good-Excellent	Excellent	-   Acids - concentrated
-   Alkaline  - diluted	Fair-Good	Good-Excellent	Good-Excellent	Good	Good	Good	Good-Excellent	Excellent	-   Alkaline  - diluted
-   Alkaline  - concentrated	Fair-Good	Fair -Good	Good-Excellent	Poor-Good	Poor	Poor	Good-Excellent	Excellent	-   Alkaline  - concentrated
-   Hydrocarbons, alipathic	Poor	Poor	Poor	Good-Excellent	Poor-Good	Excellent	Excellent	Poor	-   Hydrocarbons, alipathic
-   Hydrocarbons, aromatic	Poor	Poor	Poor	Fair to Good	Poor-Fair	Excellent	Good-Excellent	Poor	-   Hydrocarbons, aromatic
-   Mineral Oils	Poor	Poor-Fair	Poor	Excellent	Good-Excellent	Excellent	Good-Excellent	Poor	-   Mineral Oils
-   Wear	Excellent	Excellent	Fair-Good	Good-Excellent	Very Good-Excellent	Good	Very Good-Excellent	Good-Excellent	-   Wear
-   Flame	Poor	Poor	Poor	Poor	Very Good-Excellent	Very Good-Excellent	Good-Excellent	Poor	-   Flame
-   Heat aging @ 212 degr.F	Fair to Good	Fair to Good	Good-Excellent	Good	Good-Excellent	Outstanding	Good-Excellent	Good-Outstanding	-   Heat aging @ 212 degr.F
-   Electrical	Good-Excellent	Good-Excellent	Good-Excellent	Poor-Fair	Good	Good	Good	Good-Excellent	-   Electrical
Gas Permeability	Good	Fair-Good	Good	Fair-Good	Fair-Good	Good-Excellent	Good-Excellent	Fair-Good	Gas Permeability
FDA-approved grade available	No	No	No	Yes	Yes	No	No	Yes	FDA-approved grade available
White Elastomer available	No	No	No	No	Yes	Yes	No	Yes	White Elastomer available
Standard tubes are reinforced with Nylon  cords;
High Temperature (HT) tubes [ >210 degrees continuous ] are available with Kevlar reinforcing cords;
Teflon-lined elastomer tubes are available in some sizes; call for availability.
Viton®, Hypalon® and Nordel® are registered trademarks of DuPont Elastomers.