Reference Material:
DOWNLOAD – EM 163-80 Data sheet
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 | |||
| TR-10, °F | ASTM D1329 | -50 | -68 |
| TR-70, °F | ASTM D1329 | -18 | -42 |
| Compression Set, 25% Deflection, 2-330 O-ring | |||
| 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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