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Rod-piston seals

Rod-piston seals

Symmetrical single-acting hydraulic seals, commonly referred to as U-cup seals, lip seals, or wipers, are designed for dynamic sealing applications in hydraulic systems. Due to their symmetrical lip geometry, they can be installed either as rod seals or piston seals, making them highly versatile in maintenance and repair contexts.

The identical shape and dimensions of the sealing lips on both sides allow for bidirectional installation, simplifying inventory and reducing the number of seal variants required.

These seals are typically manufactured from polyurethane (PU) for increased wear resistance, or nitrile rubber (NBR) for good flexibility and fluid compatibility.

Key Characteristics:

  • Suitable for both piston and rod applications

  • Made from PU or NBR, depending on performance requirements

  • Compatible with closed groove designs

  • Simple groove geometry for ease of installation

  • Cost-effective solution for service and replacement

A wide range of standard sizes is available. Detailed performance specifications and installation guidelines can be found in the individual product descriptions.

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Hydraulic seals dimension
Rod diameter d (mm)
Groove Diameter D (mm)
Seal width h (mm)
Details
Seal type
Manufacturers
Manufacturers
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Photo Code Name Producer Stock
Rod-Piston seal RPS 135x160x15 C0 [2ERPS598] RPS 1350 1600 150 C0 Rod-Piston seal RPS 135x160x15 C0 [2ERPS598] Artic seals 6 weeks
Rod-piston seal 140x160x10 A101 NBR A101-140/3 Rod-piston seal 140x160x10 A101 NBR ALP 18
Rod-Piston seal 140x160x10 UN 80NBR Rod-Piston seal 140x160x10 UN 80NBR unknown request
Rod-Piston seal K21 140x160x10 K21-140/3 PU Rod-Piston seal K21 140x160x10 Kastas 14
Rod-Piston seal K21 140x160x15 K21-140/1 PU Rod-Piston seal K21 140x160x15 Kastas 10
Rod-Piston seal K21 140x170x18 PU K21-140 PU Rod-Piston seal K21 140x170x18 PU Kastas 13
Rod-Piston seal RPS 140x160x15 C0 [2ERPS599] RPS 1400 1600 150 C0 Rod-Piston seal RPS 140x160x15 C0 [2ERPS599] Artic seals 6 weeks
Rod-Piston seal K21 145x160x8 K21-145 PU Rod-Piston seal K21 145x160x8 Kastas 14
Rod-Piston seal K21 145x165x15 K21-145/3 NBR Rod-Piston seal K21 145x165x15 Kastas 7
Rod-Piston seal K21 145x165x15 PU K21-145/3 PU Rod-Piston seal K21 145x165x15 PU Kastas 10
Rod-Piston seal K21 145x175x18 NBR K21-145/2 NBR Rod-Piston seal K21 145x175x18 NBR Kastas 19
Rod-piston seal MACMA 145x160x11 PU MAD160145 25A685P5 Rod-piston seal MACMA 145x160x11 PU MAD160145 OEM 13
Rod-Piston seal K21 150x170x10 NBR K21-150/5 NBR Rod-Piston seal K21 150x170x10 NBR Kastas 15
Rod-Piston seal K21 150x170x15 K21-150/3 PU Rod-Piston seal K21 150x170x15 Kastas 5
Rod-Piston seal K21 150x180x15 K21-150/4 PU Rod-Piston seal K21 150x180x15 Kastas 12
Rod-Piston seal K21 150x180x18 K21-150 PU Rod-Piston seal K21 150x180x18 Kastas 5
Rod-piston seal 152,41x171,45x15,875 A175 PU95 A175-152 PU Rod-piston seal 152,41x171,45x15,875 A175 PU95 ALP 20
Rod-Piston seal 160x180x10 UN 80NBR Rod-Piston seal 160x180x10 UN 80NBR unknown request
Rod-Piston seal 160x180x10 UN 88NBR Rod-Piston seal 160x180x10 UN 88NBR unknown request
Rod-piston seal 160x185x15 A101 PU A101-160/5 PU Rod-piston seal 160x185x15 A101 PU ALP request
Rod-Piston seal K21 160x180x10 NBR K21-160/7 NBR Rod-Piston seal K21 160x180x10 NBR Kastas 5
Rod-Piston seal K21 160x180x15 K21-160/1 PU Rod-Piston seal K21 160x180x15 Kastas 10
Rod-Piston seal K21 160x190x22 K21-160 PU Rod-Piston seal K21 160x190x22 Kastas 3
Rod-Piston seal RPS 160x180x15 C0 [2ERPS601] RPS 1600 1800 150 C0 Rod-Piston seal RPS 160x180x15 C0 [2ERPS601] Artic seals 30
Rod-piston seal TTU 160x180x10 PU TTU-1875/1 Rod-piston seal TTU 160x180x10 PU Italy request
Rod-piston seal TTU 160x180x10/11 PU Rod-piston seal TTU 160x180x10/11 PU Italy request
Rod-piston seal 165x185x15 A101 NBR A101-165 Rod-piston seal 165x185x15 A101 NBR ALP 49
Rod-piston seal 165x185x15 A101 PU A101-165 PU Rod-piston seal 165x185x15 A101 PU ALP 50
Rod-Piston seal K21 165x180x9,5 PU K21-165/2 PU Rod-Piston seal K21 165x180x9,5 PU Kastas 19
Rod-Piston seal K21 168x180x14 PU K21-168 PU Rod-Piston seal K21 168x180x14 PU Kastas 6
Rod-Piston seal K21 170x190x15 K21-170/2 PU Rod-Piston seal K21 170x190x15 Kastas 2
Rod-Piston seal K21 170x200x15 K21-170 PU Rod-Piston seal K21 170x200x15 Kastas 10
Rod-Piston seal K21 170x200x15 NBR K21-170 NBR Rod-Piston seal K21 170x200x15 NBR Kastas 4
Rod-Piston seal K21 170x200x22 PU K21-170/1 PU Rod-Piston seal K21 170x200x22 PU Kastas 5
Rod-Piston seal RPS 170x190x15 C0 [2ERPS604] RPS 1700 1900 150 C0 Rod-Piston seal RPS 170x190x15 C0 [2ERPS604] Artic seals 6 weeks
Rod-Piston seal RPS 175x200x15 C0 [2ERPS607] RPS 1750 2000 150 C0 Rod-Piston seal RPS 175x200x15 C0 [2ERPS607] Artic seals 6 weeks
Rod-Piston seal 180x200x10 UN 80NBR Rod-Piston seal 180x200x10 UN 80NBR unknown request
Rod-Piston seal K21 180x200x12 K21-180/3 PU Rod-Piston seal K21 180x200x12 Kastas 2
Rod-Piston seal K21 180x200x12 K21-180/3 NBR Rod-Piston seal K21 180x200x12 Kastas 3
Rod-Piston seal K21 180x200x15 K21-180/1 PU Rod-Piston seal K21 180x200x15 Kastas 2
Rod-Piston seal RPS 180x200x15 C0 [2ERPS608] RPS 1800 2000 150 C0 Rod-Piston seal RPS 180x200x15 C0 [2ERPS608] Artic seals 6 weeks
Rod-Piston seal TTU 180x200x10 PU 999530 Rod-Piston seal TTU 180x200x10 PU Italy request
Rod-piston seal TTU 180x200x10/11 PU TTU 1879/1 Rod-piston seal TTU 180x200x10/11 PU Italy 10
Rod-Piston seal K21 185x195x12 PU K21-185 PU Rod-Piston seal K21 185x195x12 PU Kastas 13
Rod-Piston seal K21 190x210x15 PU K21-190/1 PU Rod-Piston seal K21 190x210x15 PU Kastas 4
Rod-Piston seal K21 190x220x15 PU K21-190/4 PU Rod-Piston seal K21 190x220x15 PU Kastas 4
Rod-piston seal 200x220x15 A101 PU A101-200/3 PU Rod-piston seal 200x220x15 A101 PU ALP 30
Rod-piston seal 200x230x15 A101 NBR A101-200/8 Rod-piston seal 200x230x15 A101 NBR ALP 32
Rod-Piston seal K21 200x220x15 K21-200/4 PU Rod-Piston seal K21 200x220x15 Kastas 5
Rod-Piston seal K21 200x230x18 K21-200/5 PU Rod-Piston seal K21 200x230x18 Kastas 5
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