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Parker EM163-80 Low Temp EPDM

Parker EM163-80 EPDM
Reference Material

Parker EM163-80 Low Temp EPDM

Excellent Low-Temperature Resilience

Aerospace hydraulic systems pose some of the most challenging seal environments in the world. The critical nature of aircraft landing systems, actuation systems, wheel, and brake assemblies requires a premium sealing compound to reduce the frequency of maintenance and maintain the safety of all passengers. With advancements to aircraft hydraulic fluids, mating hardware designs, and sealing requirements the engineers at Parker have developed the EM163 compound. Parker’s EM163 not only to meets the ever-demanding NAS1613 Rev 6 material specification in full, but also offers improved low-temperature resilience and excellent resistance to all commercially available phosphate ester hydraulic fluids. With TR10 temperature of -68°F, EM163 easily surpasses the industry-standard requirement and is a best in class option for eliminating low-temperature leakage.

EM163-80 Product Features:
  • NAS1613 Rev. 6 compliant
  • Excellent resistance to all commercially available phosphate ester fluids (ie. AS1241, Skydrol, Hyjet)
  • Excellent low temperature performance
  • 80 Shore M hardness
  • Product capabilities include O-rings, molded shapes, extruded and spliced geometries
Property Test Method NAS 1613 Rev 6 EM163
Original Physical Properties Spec Limits
Hardness, Shore M, pts ASTM D2240 80 ± 5 79
Tensile Strength, psi ASTM D1414 1400 1950
Ultimate Elongation, % ASTM D1414 125 195
Modulus at 100% Elongation, psi ASTM D1414 800 900
Specific Gravity ASTM D297 Report 1.18
Low Temperature Resistance #colspan# #colspan# #colspan#
TR-10, °F ASTM D1329 -50 -68
TR-70, °F ASTM D1329 -18 -42
Compression Set, 25% Deflection, 2-330 O-ring #colspan# #colspan# #colspan#
22hrs. @ 250°F, in Air ASTM D395 30 9
Testing in Phosphate Ester Fluids
Compression Set, 25% Deflection, 2-330 O-ring Spec Limits Skydrol LD4 Skydrol 500B-4 Skydrol 5
22hrs. @ 250°F, in Fluid ASTM D395 20 1 5 -2
70 hrs. @ 160°F, in Fluid 20 2 5 1
Fluid Immersion, 70hrs @ 160°F
Hardness Change, Shore M, pts. ASTM D471 -5 -3 -2 -4
Tensile Strength, psi Report 1717 1964 1545
Ultimate Elongation, % Report 177 188 162
Modulus at 100% Elongation, psi 500 913 951 913
Volume Change, %, 0.040-0.103" CS 0 to +10 +5 +1 +8
Volume Change, %, 0.116-0.275" CS 0 to +8 +6 +2 +8
Fluid Immersion, 334hrs @ 225°F
Hardness Change, Shore M, pts. ASTM D471 Report -6 -3 -5
Tensile Strength, psi 1200 1706 1736 1510
Ultimate Elongation, % 125 192 185 175
Modulus at 100% Elongation, psi 500 774 827 759
Volume Change, %, 0.040-0.103" CS 0 to +18 +11 +5 +15

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