Pressure Seal 3944 Nitrile

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Pressure Seal 3944 Nitrile - Butadiene
Categories:	Polymer; Thermoset; Rubber or Thermoset Elastomer (TSE)
Material Notes:	Compound 3944 is a 90 durometer black colored Buna N elastomer, it is formulated with FDA sanctioned materials. It exhibits good resistance to petroleum based oils and aliphatic fuels. This compound will meet or exceed the specifications listed and has the following physical properties: ASTM D2000 6 BG 915 A14 B14 B34 EO14; 7 BG 915 B14 EA14 EF11 EF21; 4 BK 915 B14 B34 EF11 EF21 21 CFR 177.2600 Information provided by Pressure Seals Inc.
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Physical Properties	Original Value	Comments

Specific Gravity	1.28 g/cc

Mechanical Properties	Original Value	Comments
Hardness, Shore A	88
	81 @Temperature 23.0 °C, Time 252000 sec	ASTM Reference Fuel B
	85 @Temperature 100 °C, Time 252000 sec	Distilled water aged
	86 @Temperature 23.0 °C, Time 252000 sec	ASTM Reference Fuel A
	91 @Temperature 100 °C, Time 252000 sec	ASTM Oil #3
	92 @Temperature 100 °C, Time 252000 sec	Heat Aged
	94 @Temperature 100 °C, Time 252000 sec	ASTM Oil #1
	95 @Temperature 125 °C, Time 252000 sec	Heat Aged
	95 @Temperature 125 °C, Time 252000 sec	Heat Aged, Test Tube Method
Tensile Strength	2597 psi
	2077.6 psi @Temperature 23.0 °C, Time 252000 sec	ASTM Reference Fuel B
	2519.1 psi @Temperature 125 °C, Time 252000 sec	Heat Aged
	2519.1 psi @Temperature 125 °C, Time 252000 sec	Heat Aged, Test Tube Method
	2682.7 psi @Temperature 23.0 °C, Time 252000 sec	ASTM Reference Fuel A
	2698.3 psi @Temperature 100 °C, Time 252000 sec	Heat Aged
	2804.76 psi @Temperature 100 °C, Time 252000 sec	ASTM Oil #1
	2895.7 psi @Temperature 100 °C, Time 252000 sec	ASTM Oil #3
Elongation, Ultimate	130 %
	69.94 % @Temperature 125 °C, Time 252000 sec	Heat Aged
	69.94 % @Temperature 125 °C, Time 252000 sec	Heat Aged, Test Tube Method
	79.95 % @Temperature 100 °C, Time 252000 sec	Heat Aged
	99.97 % @Temperature 23.0 °C, Time 252000 sec	ASTM Reference Fuel B
	109.98 % @Temperature 100 °C, Time 252000 sec	ASTM Oil #3
	119.99 % @Temperature 100 °C, Time 252000 sec	ASTM Oil #1
	119.99 % @Temperature 23.0 °C, Time 252000 sec	ASTM Reference Fuel A
100% Modulus	2338 psi
Tear Strength	210 pli	Die B; Method D 624
Compression Set	10.3 % @Temperature 100 °C, Time 79200 sec	Solid
	18.8 % @Temperature 100 °C, Time 252000 sec	Solid
	21.8 % @Temperature 100 °C, Time 79200 sec	Plied
	33 % @Temperature 100 °C, Time 252000 sec	Plied

Thermal Properties	Original Value	Comments
Brittleness Temperature	-13.0 °F
Shrinkage	-8.20 % @Temperature 100 °C, Time 252000 sec	Volume, ASTM Oil #1
	-1.80 % @Temperature 100 °C, Time 252000 sec	Volume, ASTM Oil #3
	-0.600 % @Temperature 23.0 °C, Time 252000 sec	Volume, ASTM Reference Fuel A
	6.7 % @Temperature 100 °C, Time 252000 sec	Volume, Distilled water aged
	15.8 % @Temperature 23.0 °C, Time 252000 sec	Volume, ASTM Reference Fuel B

Descriptive Properties
Color	Black

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PPRESL035 / 318245

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