• MHP29 PISTON U-SEALS

    $48.07$56.20

    Molded from urethane for resistance to extrusion and abrasion, they employ a hard nylon anti-extrusion ring.

    SEAL INFORMATION
    MATERIAL URETHANE SEAL
    NYLON BACK-UP
    TEMPERATURE RANGE -40° to +200° F
    SPEED 3 FT/SEC
    PRESSURE RANGE 0 to 3,000 PSI
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  • MIR BUFFER SEALS

    $4.20$23.65

    Molded in polyurethane this buffer is a simple flat, washer-like profile

    SEAL INFORMATION
    MATERIAL URETHANE
    TEMPERATURE RANGE -40° to +200° F
    PRESSURE RANGE 0 to 5,000 PSI
    SPEED 3 FT/SEC
    PART NUMBER (Prefix) - (ID) x (OD) x (H)
    Select options This product has multiple variants. The options may be chosen on the product page Details
  • MKPD PISTON SEAL

    $6.36$44.03

    A double acting piston seal with many features; two compact seal edges to concentrate the load against the dynamic surface, a cavity between the two external seal edges to retain fluid (reducing friction and wear), side grooves to allow pressure to load the energizer in all working conditions, high sealing performance at low pressure, excellent wear-resistance, and high resistance against extrusion.

    SEAL INFORMATION
    MATERIAL 97A URETHANE SEAL
    70A NITRILE EXPANDER
    TEMPERATURE RANGE -22° TO +210° F
    PRESSURE RANGE 0 TO 5,800 PSI
    SPEED 1.5 FT/SEC
    PART NUMBER (Prefix) - (OD) x (ID) x (W)
    MAXIMUM EXTRUSION GAP
    Pressure (PSI) 725 1450 2900 4350 5800
    Max Diametrical Gap (inches) 0.047 0.031 0.016 0.010 0.007
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  • A double acting piston seal with many features; two compact seal edges to concentrate the load against the dynamic surface, a cavity between the two external seal edges to retain fluid (reducing friction and wear), side grooves to allow pressure to load the energizer in all working conditions, high sealing performance at low pressure, excellent wear-resistance, and high resistance against extrusion.

    SEAL INFORMATION
    MATERIAL 97A URETHANE SEAL
    70A NITRILE EXPANDER
    TEMPERATURE RANGE -22° TO +210° F
    PRESSURE RANGE 0 TO 5,800 PSI
    SPEED 1.5 FT/SEC
    PART NUMBER (Prefix) - (OD) x (ID) x (W)
    MAXIMUM EXTRUSION GAP
    Pressure (PSI) 725 1450 2900 4350 5800
    Max Diametrical Gap (inches) 0.047 0.031 0.016 0.010 0.007
    Select options This product has multiple variants. The options may be chosen on the product page Details
  • MKR BUFFER SEALS

    $3.40$71.39

    Molded in PTFE with a rubber energizer, this seal absorbs the shock of pressure spikes protecting the rod seal.

    SEAL INFORMATION
    MATERIAL FILLED PTFE BUFFER
    70A NITRILE
    ENERGIZER
    TEMPERATURE RANGE -40° to +220° F
    PRESSURE RANGE 0 to 5,000 PSI
    SPEED 12 FT/SEC
    PART NUMBER (Prefix) - (ID) x (OD) x (H)
    Select options This product has multiple variants. The options may be chosen on the product page Details
  • MNBR BUFFER SEALS

    $46.94$99.36

    Molded in PTFE with a rubber energizer and a nylon anti-extrusion ring, this seal absorbs the shock of pressure spikes protecting the rod seal.

    SEAL INFORMATION
    MATERIAL PTFE BUFFER
    70A NBR ENERGIZER
    NYLON BACK-UP
    TEMPERATURE RANGE -40° to +220° F
    PRESSURE RANGE 0 to 5,000 PSI
    SPEED 3 FT/SEC
    PART NUMBER (Prefix) - (ID) x (OD) x (H)
    Select options This product has multiple variants. The options may be chosen on the product page Details
  • For two piece pistons, this seal incorporates a nitrile / fabric seal with two split bearings.

    SEAL INFORMATION
    MATERIAL NITRILE SEAL
    ACETAL BEARING
    TEMPERATURE RANGE -22° to +190° F
    PRESSURE RANGE 0 to 5,000 PSI
    SPEED 1.5 FT/SEC
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  • MOR O-RINGS

    $0.08$117.74

    Please specify 75 or 90 Durometer when ordering. Metric o-rings are offered in minimum package quantities (MP in chart).

    SEAL INFORMATION - 70 DURO MOR-JIS STYLE
    MATERIAL 70A DURO NITRILE
    TEMPERATURE RANGE -40° to +220° F
    PART NUMBER (Prefix) - (ID) x (CS)
    SEAL INFORMATION - 70 DURO NITRILE
    MATERIAL 70A DURO NITRILE
    TEMPERATURE RANGE -40° to +220° F
    PART NUMBER (Prefix) - (ID) x (CS)
    SEAL INFORMATION - 75 DURO FLUOROCARBON
    MATERIAL 75A DURO FLUOROCARBON
    TEMPERATURE RANGE -20° to +400° F
    PART NUMBER (Prefix) - (ID) x (CS)
    SEAL INFORMATION - 90 DURO NITRILE
    MATERIAL 90A DURO NITRILE
    TEMPERATURE RANGE -40° to +220° F
    PART NUMBER (Prefix) - (ID) x (CS)
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  • MOS OIL SEALS

    $3.70$156.35
    SEAL INFORMATION
    MATERIAL RUBBER SEAL
    STEEL CASE
    TEMPERATURE RANGE -40° TO +225° F
    PRESSURE RANGE 10 PSI @ 1000 FPM
    PART NUMBER (Prefix) - (ID) X (OD) X (H)
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  • MPS PISTON SEAL

    $8.27$114.62

    Molded from filled PTFE and machined to close tolerances these seals feature low friction and excellent wear characteristics. Nitrile o-rings are used for energizers.

    SEAL INFORMATION
    MATERIAL PTFE PISTON SEAL
    70A NITRILE ENERGIZER
    TEMPERATURE RANGE -40° TO +230° F
    PRESSURE RANGE 0 TO 5,000 PSI
    SPEED 12 FT/SEC
    PART NUMBER (Prefix) - (ID) x (W) x (CS1)
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  • Molded from filled PTFE and machined to close tolerances these seals feature low friction and excellent wear characteristics. Nitrile o-rings are used for energizers.

    SEAL INFORMATION
    MATERIAL PTFE PISTON SEAL
    70A NITRILE ENERGIZER
    TEMPERATURE RANGE -40° TO +230° F
    PRESSURE RANGE 0 TO 5,000 PSI
    SPEED 12 FT/SEC
    PART NUMBER (Prefix) - (ID) x (W) x (CS1)
    Select options This product has multiple variants. The options may be chosen on the product page Details
  • Select options This product has multiple variants. The options may be chosen on the product page Details
  • The MPS2000 double action piston seal is designed for heavy duty hydraulic applications. The small profile is resistant to shock loads and has high abrasion and extrusion resistance. Its split design allows simple installation on a solid piston.

    SEAL INFORMATION
    MATERIAL NYLON SEAL WITH NITRILE ENERGIZER
    TEMPERATURE RANGE -22° TO +230° F
    PRESSURE RANGE 0 TO 7250 PSI
    SPEED 3 FT/SEC
    PART NUMBER (Prefix) - (Bore Size)
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  • Designed to fit on one or two piece piston, this piston seal employs a nitrile seal for high sealability, nylon split back-ups for extrusion resistance, and two split bearing rings. No further support bearings required.

    SEAL INFORMATION
    MATERIAL 70A NBR SEAL
    NYLON BACK-UP & BEARING
    TEMPERATURE RANGE -22° TO +212° F
    PRESSURE RANGE 0 TO 6,000 PSI
    SPEED 1.5 FT/SEC
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  • With nitrile seal bonded on each side by fabric material it also incorporates 2 full depth 'L' bearings to form a very strong assembly. This seal requires a two piece piston.

    SEAL INFORMATION
    MATERIAL 70A NBR / FABRIC SEAL
    ACETAL BEARING / BACK-UP
    TEMPERATURE RANGE -22° TO +212° F
    PRESSURE RANGE 0 TO 5,000 PSI
    SPEED 1.5 FT/SEC
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  • This style is designed for two piece pistons. The seal is a molded Nitrile rubber element with bonded rubberized fabric reinforcements and two anti-extrusion polyacetal bearings.

    SEAL INFORMATION
    MATERIAL 70A NBR / FABRIC SEAL
    ACETAL BEARING / BACK-UP
    TEMPERATURE RANGE -22° to +212° F
    PRESSURE RANGE 0 to 5,000 PSI
    SPEED 1.5 FT/SECtd>
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  • Consisting of a nitrile seal and two split acetal bearing, this assembly is used in light duty applications and can be installed on one or two piece pistons.

    SEAL INFORMATION
    MATERIAL NITRILE SEAL
    ACETAL BEARING
    TEMPERATURE RANGE -22° to +212° F
    PRESSURE RANGE 0 to 3,000 PSI
    SPEED 1.5 FT/SEC
    Select options This product has multiple variants. The options may be chosen on the product page Details
  • Incorporating a nitrile / fabric seal with two split bearing this assembly affords low friction and high strength for one or two piece pistons.

    SEAL INFORMATION
    MATERIAL 70A NBR / FABRIC SEAL OD
    70A NBR SEAL ID
    ACETAL BEARING
    TEMPERATURE RANGE -22° TO +212° F
    PRESSURE RANGE 0 TO 5,000 PSI
    Select options This product has multiple variants. The options may be chosen on the product page Details
  • MPSU PISTON SEAL

    $6.41$47.37

    Molded from tough, wear resistant polyester with additives of 5% glass fiber and 5% PTFE these seals are totally interchangeable with style MPS seals of the same dimensions. Nitrile o-rings are used as energizers.

    SEAL INFORMATION
    MATERIAL GLASS / PTFE FILLED POLYESTER SEAL, RUBBER ENERGIZER
    TEMPERATURE RANGE -40° to +230° F
    PRESSURE RANGE 0 to 5,000 PSI
    PART NUMBER (Prefix) - (ID) x (W) x (CS1)
    Select options This product has multiple variants. The options may be chosen on the product page Details
  • MPSU PISTON SEAL ASSEMBLIES

    $7.54$24,334.00

    Molded from tough, wear resistant polyester with additives of 5% glass fiber and 5% PTFE these seals are totally interchangeable with style MPS seals of the same dimensions. Nitrile o-rings are used as energizers.

    SEAL INFORMATION
    MATERIAL GLASS / PTFE FILLED POLYESTER SEAL, RUBBER ENERGIZER
    TEMPERATURE RANGE -40° to +230° F
    PRESSURE RANGE 0 to 5,000 PSI
    PART NUMBER (Prefix) - (ID) x (W) x (CS1)
    Select options This product has multiple variants. The options may be chosen on the product page Details
  • MPU PISTON U-SEALS

    $7.53$71.39

    Molded from high quality urethane and designed specifically for piston applications. A = Alternative to NOK

    SEAL INFORMATION
    MATERIAL URETHANE
    TEMPERATURE RANGE -22° to +212° F
    PRESSURE RANGE 0 to 5,000 PSI
    SPEED 3 FT/SEC
    PART NUMBER (Prefix)-(ID) x (OD) x (H)
    Select options This product has multiple variants. The options may be chosen on the product page Details
  • MRB WEAR RINGS

    $11.64$12.62

    Molded from a sturdy nylon material, these bushings are found chiefly in Ford metric cylinders.

    SEAL INFORMATION
    MATERIAL NYLON
    TEMPERATURE RANGE -40° to +250° F
    SPEED 3 FT/SEC
    COMPRESSIVE STRENGTH 25,000 PSI
    TENSILE STRENGTH 27,000 PSI
    PART NUMBER (Prefix) - (ID) x (OD) X (H)
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  • MRT CUSHION SEALS

    $17.10$43.73
    SEAL INFORMATION
    MATERIAL NYLON OR REINFORCED PHENOLIC
    TEMPERATURE RANGE N = -67° to +212° F
    P = -67° to +248° F
    PRESSURE RANGE 0 to 5,000 PSI
    PART NUMBER (Prefix) - (ID) x (OD) x (H)
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  • Designed specifically for rod application, the short lip design and solid 'U' cavity provide high sealability at low pressure. At the heel, a secondary lip provides stability, friction-reducing lube retention, and a contaminant blocker. Molded in polyurethane for excellent wear resistance.

    SEAL INFORMATION
    MATERIAL URETHANE
    TEMPERATURE RANGE -22° to +220° F
    PRESSURE RANGE 0 to 5,000 PSI
    SPEED 3 FT/SEC
    PART NUMBER (Prefix) - (ID) x (OD) x (H)
    Select options This product has multiple variants. The options may be chosen on the product page Details
  • MRTU ROD U-SEALS

    $8.27$70.45

    Molded in a tough urethane this seal employs an additional lip near the heel. The Twin Lip design provides stability, friction-reducing lube retention, and a contaminant blocker. VME - Secondary lip is further from heel than standard MRTU. NOTE: E = European Urethane

    SEAL INFORMATION
    MATERIAL URETHANE
    TEMPERATURE RANGE -40° to +225° F
    E: -22° to +212° F
    PRESSURE RANGE 0 to 5,000 PSI
    SPEED 3 FT/SEC
    PART NUMBER (Prefix) - (ID) x (OD) x (H)
    Select options This product has multiple variants. The options may be chosen on the product page Details
  • MRTUB ROD U-SEALS

    $41.73$103.56

    Our premium single-acting polyurethane rod seal incorporates an NBR energizer to seal at low pressures. The twin lip design provides stability and friction-reducing lube retention for dry rod sealing, and the included hard acetal backup ring resists extrusion. MRTUB is capable of pressures up to 10,000 psi in approved applications. Please consult Hercules Engineering for pressures above 6,000 psi.

    SEAL INFORMATION
    MATERIAL 94 A URETHANE SEAL
    RUBBER ENERGIZER
    POLYACETAL ANTI-EXTRUSION RING
    MAXIMUM OPERATING CONDITIONS
    MAXIMUM SPEED
    3FT./SEC
    PRESSURE RANGE
    0 - 6,000 PSI
    TEMPERATURE RANGE
    -50° TO +230° F
    MAXIMUM EXTRUSION GAP
    PRESSURE 2,400 PSI 3,750 PSI 6,000 PSI 7,500 PSI 10,000 PSI
    MAX. RADIAL GAP (INCH) .040 .032 .024 .016 .010
    PART NUMBER (Prefix)(CS) - (ID) - (Height)
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  • MRU ROD U-SEALS

    $3.97$131.26

    Our premium single-acting polyurethane rod seal incorporates an NBR energizer to seal at low pressures. The twin lip design provides stability and friction-reducing lube retention for dry rod sealing, and the included hard acetal backup ring resists extrusion. MRTUB is capable of pressures up to 10,000 psi in approved applications. Please consult Hercules Engineering for pressures above 6,000 psi.

    Select options This product has multiple variants. The options may be chosen on the product page Details
  • MRUB ROD U-SEALS

    $30.08$93.44

    Molded in a tough urethane this rod u-seal fits tightly in the groove while providing increased radial force on the rod. The employment of a nylon back up makes it highly extrustion resistant.
    GT = GREEN TWEED SEAL

    SEAL INFORMATION
    MATERIAL URETHANE SEAL
    NYLON BACK-UP
    TEMPERATURE RANGE -65° to +220° F
    PRESSURE RANGE 0 to 5,500 PSI
    SPEED 3 FT/SEC
    PART NUMBER (Prefix) - (ID) x (OD) x (H)
    Select options This product has multiple variants. The options may be chosen on the product page Details
  • MRUN ROD U-SEALS

    $15.74$59.34

    The MRUN Rod U-Seal is designed with improved oil resistance and compression set verses urethane seals. The addition of a u-seal back-up ring will increase the pressure range of the seal from 2,000 psi to 3,000 psi. A = Alternative to NOK

    SEAL INFORMATION
    MATERIAL NITRILE
    TEMPERATURE RANGE -8° to +212° F
    PRESSURE RANGE 0 TO 2,000 PSI W/O BACK-UP
    0 TO 3,000 PSI W/BACK-UP
    SPEED 3FT/SEC
    SUFFIX HT = HIGH TEMPERATURE NITRILE (-13° to +248° F)
    LT = LOW TEMPERATURE NITRILE (-67° to +176° F)
    Select options This product has multiple variants. The options may be chosen on the product page Details
  • MSBR BUFFER SEALS

    $21.77$34.02

    Molded in Nylon with a rubber energizer this style absorbs the shock of pressure spikes and relieves back pressure by way of slots on the pressure side of the energizer

    SEAL INFORMATION
    MATERIAL NYLON BUFFER
    70A NITRILE ENERGIZER
    TEMPERATURE RANGE -40° to +220° F
    PRESSURE RANGE 0 to 5,000 PSI
    SPEED 3FT/SEC
    PART NUMBER (Prefix) - (ID) x (OD) x (H)
    Select options This product has multiple variants. The options may be chosen on the product page Details
  • MSL RETAINER RINGS

    $9.23$21.15

    Internal Retainer Rings

    Select options This product has multiple variants. The options may be chosen on the product page Details
  • MSMR ROD SEALS

    $12.83$76.69

    With redundant nitrile lips and an acetal back-up, this seal features high sealability and extrusion resistance.

    SEAL INFORMATION
    MATERIAL NBR SEAL
    ACETAL BACK-UP
    HEADER OF URETHANE,
    ACETAL, OR FABRIC -
    REINFORCED RUBBER
    TEMPERATURE RANGE -22° to +212° F
    PRESSURE RANGE 0 to 10,000 PSI
    SPEED 3 FT/SPEED
    PART NUMBER (Prefix) - (ID) x (OD) x (H)
    Select options This product has multiple variants. The options may be chosen on the product page Details
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