Hydraulic and Fluid Seals -Piston4 Archives

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K1

Premium Long-Life Low-Friction Hydraulic Piston Seal

Non-symmetrical uni-directional design provides longest service life in medium – to high – pressure hydraulic piston sealing applications. Beveled lip for maximum fluid sealing ability and a stretch fit ensures stability and a tight static seal on the piston. ISO 5597 and many other sizes available.

Operating Range

Material	Operating Pressure up to	Maximum Pressure up to	Temperature	Surface Speed up to	Fluid, Media Compatability
Duralast 4203	3,800psi (260bar)	5,000psi (350bar)	-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	5,000psi (350bar)	8,000psi (520bar)	-22°F to 260°F (-30°C to 125°C)	1.6ft/s (0.5m/s)	same as Duralast 4203
Duralast 8166	2,300psi (160bar)	3,800psi (260bar)	-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	2,300psi (160bar)	3,800psi (260bar)	-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	2,300psi (160bar)	3,800psi (260bar)	-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

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K81

Low-Friction High-Pressure Bi-Directional Hydraulic Piston Seal

Rectangular energizer ensures a stable, positive seal and provides continuous contact along the sealing surface. The filled-PTFE cap provides low friction and smooth operation of hydraulic cylinders over a wide range of medium- to high-pressure sealing applications. The small axial seal height reduces piston height, weight and cost. ISO 7425-1 and many standard and custom sizes available.

Operating Range

Material	Operating Pressure up to	Maximum Pressure up to	Temperature	Surface Speed up to	Fluid, Media Compatability
Permachem 6643	3,800psi (260bar)	5,000psi (350bar)	-40°F to 400°F (-40°C to 210°C)	13ft/s (4m/s)	mineral oil-based fluids, fire-resistant water-based hydraulic fluids including HFA and HFB, biodegradable fluids, vegetable oils, bio-diesels, and most modern hydraulic fluids
Permachem 6150	5,000psi (350bar)	6,000psi (420bar)	-40°F to 400°F (-40°C to 210°C)	13ft/s (4m/s)	same as Permachem 6643
Additional standard materials available: PTFE, filled PTFE®, engineered thermoplastics, high-performance polyurethanes, NBR (Nitrile), FKM, Viton®, HNBR, EPDM, Aflas®, Hytrel®, Silicone, low- and high-temperature, FDA-compliant seal material grades 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, surface speed above 5ft/s (1.3m/s), or for any advice, please contact engineering@ahpseals.com

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K8B

Premium High-Pressure Bi-Directional Hydraulic Piston Seal

Rectangular energized cap seal design for high-pressure piston sealing applications. Rectangular energizer ensures a stable, positive seal and provides continuous contact along the sealing surface. The specially designed hard wearing cap is easier to install than PTFE cap seals and provides high extrusion resistance. Further, the design provides a fluid reservoir between the two beveled sealing lips which retains system fluid, resulting in reduced running and breakaway friction. Beveled sealing lips for maximum fluid sealing ability protect against extrusion during pressure spikes. The small axial seal height reduces piston height, weight and cost. ISO 7425-1 and many standard and custom sizes available.

Operating Range

Material	Operating Pressure up to	Maximum Pressure up to	Temperature	Surface Speed up to	Fluid, Media Compatability
Duralast 4203	3,800psi (260bar)	5,000psi (350bar)	-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	5,000psi (350bar)	8,000psi (520bar)	-22°F to 260°F (-30°C to 125°C)	1.6ft/s (0.5m/s)	same as Duralast 4203
Additional standard materials available: High-performance polyurethanes, low- and high-temperature, FDA-compliant seal material grades, engineered thermoplastics, Hytrel®, NBR (Nitrile), FKM, Viton®, HNBR, EPDM, Aflas®, Silicone, 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

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K1

K81

K8B

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