Parker's HNBR sealing compounds provide cost-effective solutions in aggressive EOG environments.
N1173-70, N1231-80 and KB163-90 are sealing compounds made from hydrogenated nitrile, a synthetic polymer that results from the hydrogenation of nitrile rubber (NBR). The hydrogenation process gives HNBR materials enhanced thermal stability (up to 149°C/300°F, with short periods at higher temperatures).
HNBR materials also possess superior mechanical properties and enhanced fluid compatibility over standard nitrile compounds. These properties allow HNBR materials to be a cost-effective bridging compound between nitrile and fluorocarbon elastomers.
Applications
Due to their enhanced abrasion resistance, Parker's HNBR elastomers are commonly used in journal bearing seals for drill bits. Their fluid and temperature resistance make N1173-70, N1231-80 and KB163-90 compounds ideal for any EOG applications where high temperatures and harsh chemicals, such as amines, are present. Check with the Gallagher Engineering Department to be sure HNBR fits your application.
Recommended For:
Sour gas
Water/glycol
Petroleum Oils
Silicone greases
Water/Steam
Most refrigerants including R134a
Dilute acids and bases
Not recommended for:
Polar solvents
Strong acids
Fuels
Ozone
Chlorinated hydrocarbons
Acetone
Aldehydes
Aliphatic hydrocarbons
Key Features:
Improved high-temperature resistance over nitrile materials
Enhanced wear and abrasion resistance over standard nitrile materials
Specific compounds are explosive decompression resistant
Ozone resistant
Improved chemical compatibility with several aggressive fluid medias
Improved compression set resistance
Parker’s HNBR Compounds
N1173-70
platen
N1231-80
platen
KB163-90 platen
Comp A
AS568A-214
Typical Physical Properties
Hardness, Shore A, pts.
71
81
88
88
Tensile strength, psi
3048
3413
3219
2875
Elongation, %
180
297
107
98
Modulus at 50% elongation, psi
Not Tested
Not Tested
1552
1350
Compression Set
70hrs @ 150°C (302°F)
% of reflection
18.4
27.1
31.9
45.0
Fluid Immersion ASTM Oil #1
70hrs @ 150°C (302°F)
Hardness change, pts.
0
+3.0
+2.0
Not Tested
Tensile change, %
+3.1
+3.8
+29.3
Elongation change, %
+11.1
-7.1
No Change
Volume change. %
+3.0
-1.3
-1.5
Fluid Immersion, IRM 903 Oil
70hrs @ 150°C (302°F)
Hardness change, pts.
-7.0
Not Tested
-7.0
Not Tested
Tensile change, %
-22.6
+14.9
Elongation change, %
-11.1
+2.8
Volume change. %
+14.4
+8.2
Fluid Immersion, IRM 903 Oil
168hrs @ 150°C (302°F)
Hardness change, pts.
Not Tested
Not Tested
Not Tested
-8.0
Tensile change, %
+12.1
Elongation change, %
+4.1
Volume change. %
+6.5
Heat Aging
70hrs @ 150°C (302°F)
Hardness change, pts.
+3.0
+4.0
+3.0
Not Tested
Tensile change, %
-4.0
-8.5
+21.6
Elongation change, %
-18.0
-20.2
-14.0
Unless otherwise noted, these are test values from a limited number of samples and should be used for establishing specific limitations
