Premium High-Pressure Bi-Directional Compact Rod Seal

R56B


Premium High-Pressure Bi-Directional Compact Rod Seal

Designed with an energizing element for easier fitment and responsiveness to changing pressures. integrated positive actuated live back-up rings to eliminate seal extrusion in highpressure systems with shock load or where increased clearance gaps are present. This is an excellent seal where positive sealing from both directions is required. Robust design for the most arduous conditions.




Operating Range
MaterialOperating Pressure up toMaximum Pressure up toTemperatureSurface Speed up toFluid, Media
Compatability
Duralast 42035,000psi (350bar)10,000psi (700bar)-22°F to 260°F (-30°C to 125°C)1.6ft/s (0.5m/s)mineral oil-based fluids, fire-resistant water-based hydraulic fluids including HFA and HFB, sea water, biodegradable fluids, vegetable oils, bio-diesels, and most modern hydraulic fluids
Duralast 44038,000psi (520bar)14,500psi (1000bar)-22°F to 260°F (-30°C to 125°C)1.6ft/s (0.5m/s)same as Duralast 4203
Duralast 81663,800psi (260bar)5,000psi (350bar)-4°F to 392°F (-20°C to 200°C)3.2ft/s (1.0m/s)fire-resistant fluids, phosphate esters, mineral oils, greases, and most inorganic acids and chemicals, gasoline and gasoline/alcohol blends, hard vacuum
Duralast 51013,800psi (260bar)5,000psi (350bar)-22°F to 212°F (-30°C to 100°C)1.6ft/s (0.5m/s)mineral-oil based hydraulic fluids, silicone greases, petroleum-based oils, water and alcohols
Duralast 61463,800psi (260bar)5,000psi (350bar)-30°F to 302°F (-35°C to 150°C)2.0ft/s (0.7m/s)excellent heat and oil resistance, including exposure to such oil additives as detergents, anti-oxidants and anti-wear agents
Additional standard materials available: High-performance polyurethanes, NBR (Nitrile), FKM, Viton®, HNBR, EPDM, Aflas®, Hytrel®, Silicone, low- and high-temperature, FDA-compliant seal material grades, PTFE, filled Teflon®, engineered thermoplastics and proprietary specialized Duralast™, Duraloy™, and Permachem™ materials.
*Important Note: Maximum values above depend on extrusion gap, clearances, seal material, media, temperatures, pressures, surface speed, dynamic running surface finish and working environment. Seals cannot be operated at their upper ratings at the same time. Pressure ratings can be increased by reducing clearances. For pressure above specified operating pressure, please contact engineering@ahpseals.com
Size Table (Inch)Standard range sizes listed below are preferred sizes for new design applications. Seals are available for any rod diameter size in 0.001 inch increments, including functional range. Additionally, we offer any other seal size as required.
A
Rod Diameter
CS
Cross-Section
D
Groove
Diameter
B*
Piston
Diameter
Tolerance
L
Groove
C
R1
R
Standard Range
Functional Range
Tolerance
D=
B=
D,B
Tol.+0.008/-0
min.
max.
max.
2.000 - 2.999"
1.500 - 5.000"
+0/-0.002
.250
A + 0.500
A + 0.028
+0.002/-0
0.500
0.050
0.020
0.006
3.000 - 5.999"
2.000 - 8.000"
+0/-0.002
.313
A + 0.626
A + 0.029
+0.002/-0
0.625
0.070
0.025
0.006
6.000 - 9.499"
2.500 - 14.000"
+0/-0.003
.375
A + 0.750
A + 0.030
+0.003/-0
0.750
0.080
0.030
0.008
9.500 - 12.249"
4.000 - 28.500"
+0/-0.004
.500
A + 1.000
A + 0.031
+0.003/-0
1.000
0.100
0.035
0.008
12.500 - 28.499"
6.500 - 28.500"
+0/-0.006
.625
A + 1.250
A + 0.032
+0.004/-0
1.180
0.120
0.040
0.008
28.500" - 72.000"
consult with Ahpseals engineering
* Based on using wear rings. For rod diameters below 1.750" an open or split housing for easy installation is recommended.
Surface finish: rod (A) Ra 4-12µin – Static (D,L) Ra max. 32µin. See Technical Info for more specific information.

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Seal Housing Drawing