Bi Directional Low Friction PS Archives

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K8

Low-Friction Bi-Directional Hydraulic Piston Seal

O-ring-energized filled-PTFE cap seal design provides smooth movement, low friction and wear in low- to medium-duty piston sealing applications. The small axial seal height reduces piston height, weight and cost. Commonly used in hydraulic presses, machine tools, injection molding machines and mobile hydraulics. Retro fits seals of similar design.

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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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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K81B2

Premium 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 for hydraulic cylinders over a wide range of high-pressure sealing applications. Back-up rings handle larger clearances, elevated temperatures, misalignment, high pressures and ultra-high pressure spikes. The small axial seal height reduces piston height, weight and cost. Retro fits seals of similar design.

Operating Range

Material	Operating Pressure up to	Maximum Pressure up to	Temperature	Surface Speed up to	Fluid, Media Compatability
Permachem 6643	5,000psi (350bar)	7,500psi (520bar)	-40°F to 400°F (-40°C to 210°C)	5ft/s (1.5m/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	6,000psi (420bar)	10,000psi (700bar)	-40°F to 400°F (-40°C to 210°C)	5ft/s (1.5m/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 or for any advice, please contact engineering@ahpseals.com

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K8E

Low-Friction Bi-Directional Hydraulic Piston Seal

Cap seal providing low friction and long service life over a wide range of light- to medium-duty bi-directional service applications. The K8E retrofits into standard O-ring grooves designed for no back-up, single, or two back-up rings without modification. The specially designed filled-PTFE cap resists extrusion and twisting of the O-ring under higher pressure.

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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K8P

Low-Friction Bi-Directional Piston Seal

PTFE cap seal providing low friction and long service life over a wide range of light-duty bi-directional service applications. The thin PTFE cap is more responsive to low-pressure sealing applications and can be used for pneumatic and light-duty hydraulic sealing.

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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K8

K81

K81B2

K8E

K8P

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