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Ensure sealing of your cylinders thanks to our rod and piston seals

Rod and piston seals are mainly used to ensure sealing in hydraulic cylinders. Chromex provides a wide range of moulded and machined parts in order to offer you best solution for your industrial sealing requirements. Chromex’s piston and rod seals allow translating parts within a dynamic sealing to connect to each other. 
 

Chromex’ rod seals

Rod seals are mainly used in hydraulic cylinders to ensure sealing of liquids. These seals are also called U-Rings and can have different shapes: lip seals, composite seals or compact seals.

Hydraulic seals - Chromex
Blue seals - Chromex

Purpose of rod seals

Rod seals act as a pressure barrier and ensure the working fluid to stay inside the hydraulic cylinder. Rod seals have therefore an essential sealing function in the hydraulic field. Rod seals regulate a thin layer of lubricant on the rod when it retracts thus avoiding the rod to erode and lubricating the wiper at the same time.

The different types of rod seals

Chromex benefits from a wide range of hydraulic rod seals. We can offer you U-rings with simple or double effect. The main used materials for hydraulic seals are TPU (thermoplastic), PU, PTFE and NBR. Chromex benefits from available stock of standard rod seals within below groups: 

ID - Rod seals

ID -PROFIL

  • Type : ID
  • Material : PU
  • Max pressure : 400 bars
  • Temperature : -30/100 °C
  • Sliding speed : <0,5 ms
  • Chromex reference : 70.0104
UM HP - Rod seals

UM HP - PROFIL

  • Type : UM HP
  • Material : NBR /NBR Toilé / POM
  • Max pressure : 400 bars
  • Temperature : -30/100 °C
  • Sliding speed : <0,5 ms
  • Chromex reference : 70.0202
UM PU - Rod seals

UM PU - PROFIL

  • Type : UM PU
  • Material : PU
  • Max pressure : 400 bars
  • Temperature : -30/100 °C
  • Sliding speed : <0,5 ms
  • Chromex reference : 70.0200
CTSE - Rod seals

CTSE - PROFIL

  • Type : CTSE
  • Material : PTFE / NBR / FKM
  • Max pressure : 500 bars
  • Temperature : suivant matière
  • Sliding speed : <15 ms
  • Chromex reference : 43.0600

Multi-purpose joints

Chromex disposes also from a wide range of seals that can be used as piston or as rod seals. Purpose is a great flexibility and alternatives for the aftermarket. Hereunder, you will find the 3 big families of standardized seal profiles :

UN - seals that can be used as piston or as rod seals

UN - PROFIL

  • Type : UN
  • Material : PU
  • Max pressure : 300 bars
  • Temperature : -30/100 °C
  • Sliding speed : <0,5 ms
  • Chromex reference : 70.0100
UM NBR - seals that can be used as piston or as rod seals

UM - PROFIL

  • Type : UM NBR
  • Material : NBR / NBR Toilé
  • Max pressure : 250 bars
  • Temperature : -30/100 °C
  • Sliding speed : <0,5 ms
  • Chromex reference : 70.0201
B - seals that can be used as piston or as rod seals

B - PROFIL

  • Type : B
  • Material : PU / NBR
  • Max pressure : 350 bars
  • Temperature : -30/100 °C
  • Sliding speed : <0,5 ms
  • Chromex reference : 70.0210
3 green, black and grey composite seals - Chromex

Many other stem seal profiles

The above-mentioned families represent only a small part of the rod seals that we can provide: Chromex benefits from more than 30 different U-ring profiles that can suit your requirements and will ensure excellent sealing translation between the cylinder head and the piston rod.

Chromex’s piston seals

Piston seals ensure sealing of the present fluids put under pressure between the piston and the bore of the hydraulic cylinder. Chromex’s piston seals are shaped so as to reduce pressure between piston and rod when in motion.

Purpose of piston seals

Piston seals function is similar to rod seals: pressure control and maintaining the working fluid inside the hydraulic cylinder. Piston seals regulate a thin layer of lubricant on the whole surface of the cylinder head when the piston is moving, thus avoiding the erosion of the cylinder head.

Hydraulic piston seals in various colors - Chromex

The different types of piston seals

We can provide you with a wide range of double effect piston seals for hydraulic use. The main used materials for piston seals are TPU, PU, NBR and PTFE (PTFE filled with 40 % Bronze, most of the time). Chromex disposes of compact piston seals: compact piston seals composed of 3 elements (JP3) and compact piston seals with 5 elements (JP5). 
Chromex has available stock of standard piston seals, that are part of the below families:

JP3 - Standard piston seals

JP3 - PROFIL

  • Type : JP3
  • Material : NBR/ NBR TOILE / POM
  • Max pressure : 400 bars
  • Temperature : -25 / 100 °C
  • Sliding speed : <0,5 ms
  • Chromex reference : 40.0003
JP5 - Standard piston seals

JP5 - PROFIL

  • Type : JP5
  • Material : NBR/ NBR TOILE / POM
  • Max pressure : 400 bars
  • Temperature : -25 / 100 °C
  • Sliding speed : <0,5 ms
  • Chromex reference : 40.0005
CPPU - Standard piston seals

CPPU - PROFIL

  • Type : CPPU
  • Material : PU / NBR
  • Max pressure : 150 bars
  • Temperature : -30 / 100 °C
  • Sliding speed : <0,8 ms
  • Chromex reference : 40.0001
Standard piston seals

CPDE - PROFIL

  • Type : CPDE
  • Material : PTFE / NBR ou FKM
  • Max pressure : 500 bars
  • Temperature : suivant matière 
  • Sliding speed : <15 ms
  • Chromex reference : 42.0701
Seals in various colors - Chromex

Many other piston seal profiles

The above-mentioned families are just a small part of all the possible piston seals that we can provide you with: we benefit from more than 30 different profiles of piston seals that can answer your needs and ensure great translation sealing between the piston and the bore of the hydraulic cylinder.