P50
Heavy-Duty Bi-Directional Piston Seal with Live Back-Up Rings
Squeeze-type piston seal for use on vertical or no-drift piston. Positive actuated live back-up rings to eliminate seal extrusion in high-pressure applications or larger extrusion gaps. Requires split piston design for smaller diameters for easier fitment.
Operating Range
Material | Operating Pressure up to | Maximum Pressure up to | Temperature | Surface Speed up to | Fluid, Media Compatability |
---|---|---|---|---|---|
Duralast 4203 | 5,000psi (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 4403 | 8,000psi (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 8166 | 3,800psi (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 5101 | 3,800psi (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 6146 | 3,800psi (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 PTFE®, 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)The standard range sizes listed below are the preferred sizes for new design applications. Seals are available for any bore size in 0.001inch increments, including functional range. Additionally, we offer any other seal size as required.
A Bore 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" | +0.002/-0 | .250 | A - 0.500 | A - 0.028 | +0/-.003 | 0.500 | 0.045 | 0.020 | 0.006 |
3.000 - 5.999" | 2.000 - 8.000" | +0.003/-0 | .313 | A - 0.626 | A - 0.029 | +0/-.004 | 0.625 | 0.060 | 0.020 | 0.006 |
6.000 - 9.499" | 2.500 - 18.000" | +0.003/-0 | .375 | A - 0.750 | A - 0.030 | +0/-.004 | 0.750 | 0.075 | 0.025 | 0.008 |
9.500 - 12.249" | 4.000 - 28.500" | +0.004/-0 | .500 | A - 1.000 | A - 0.031 | +0/-.005 | 1.000 | 0.100 | 0.030 | 0.008 |
12.500 - 28.499" | 6.500 - 28.500" | +0.006/-0 | .625 | A - 1.250 | A - 0.032 | +0/-.006 | 1.180 | 0.070 | 0.030 | 0.012 |
> 28.500 | consult with Ahpseals engineering | |||||||||
* Based on using wear rings. For pressure above 5,000psi, please contact engineering for clearances. Surface finish: bore (A) Ra 4-12µin – Static (D,L) Ra max. 32µin. See Technical Info for more specific information. |
Seal Housing Drawing