Double Acting Piston Seals

Double Acting Piston Seals

Double Acting Piston Seals

Piston Seals or Piston Rings are used in hydraulic cylinders for fluid sealing and are designed to ensure that pressurised fluid does not leak across the cylinder head as the system pressure pushes the piston down the cylinder bore.

The choice of piston seal is decided by the way in which the cylinder operates. For a cylinder which is exclusively single-acting, capable of sealing dynamic pressure from one side (unidirectional), it is always best to choose the type of seal designed to provide optimum sealing qualities for single-acting functions.

The best sealing capacity of a double-acting cylinder, capable of sealing dynamic pressure from both sides (bidirectional), is achieved by choosing a double-acting seal.

A piston design where two single-acting seals on the piston for a double-acting cylinder are used can easily give rise to a breakdown. The reason is that a very high pressure can be trapped between the seals.

Piston seals, both single- and double-acting, can be designed for and used with integrated or separate back-up rings and guide rings.

Hallite offers a wide range of piston seals that provide the ultimate in leakage control. Piston seals are usually manufactured in our high performance polyurethane Hythane® 181, Hallprene® rubber/fabric composite or polyester elastomer.

Double Acting Piston Seals-Metric

  • 50 50Max pressure 350 Bar 
    Temp range -30°C to 100°C 
    Max speed 0.5m/sec
  • 51 51Max pressure 700 Bar 
    Temp range -30°C to 100°C 
    Max speed 0.5m/sec
  • 52 52Max pressure 600 Bar 
    Temp range -30°C to 100°C 
    Max speed 0.8m/sec
  • 53 53Max pressure 500 Bar 
    Temp range -30°C to 100°C 
    Max speed 0.5m/sec
  • 54 54Max pressure 350 Bar 
    Temp range -30°C to 100°C 
    Max speed 4m/sec
  • 56 56Max pressure 500 Bar 
    Temp range -30°C to 100°C 
    Max speed 0.5m/sec
  • 58 58Max pressure 700 Bar 
    Temp range -30°C to 100°C 
    Max speed 0.5m/sec
  • 64 64Max pressure 400 Bar 
    Temp range -30°C to 100°C 
    Max speed 0.5m/sec
  • 65 65Max pressure 160 Bar 
    Temp range -30°C to 100°C 
    Max speed 0.5m/sec
  • 68 68Max pressure 500 Bar 
    Temp range -30°C to 100°C 
    Max speed 0.5m/sec
  • 77 77Max pressure 350 Bar 
    Temp range -30°C to 100°C 
    Max speed 0.5m/sec
  • 714 714Max pressure 500 Bar 
    Temp range -40°C to 110°C 
    Max speed 2m/sec
  • 730 730Max pressure 700 Bar 
    Temp range -40°C to 110°C 
    Max speed 0.3m/sec
  • 735 735Max pressure 500 Bar 
    Temp range -40°C to 120°C 
    Max speed 1.5m/sec
  • 753 753Max pressure 400 Bar 
    Temp range -30°C to 100°C 
    Max speed 0.5m/sec
  • 754 754Max pressure 500 Bar 
    Temp range -40°C to 110°C 
    Max speed 1m/sec
  • 764 764Max pressure 250 Bar 
    Temp range -30°C to 110°C 
    Max speed 1m/sec
  • 780 780Max pressure 400 Bar 
    Temp range -30°C to 100°C 
    Max speed 0.5m/sec
  • GPS GPSMax pressure 350 Bar 
    Temp range -30°C to 100°C 
    Max speed 2m/sec

Double Acting Piston Seals-Inch

  • 53 53Max pressure 7500 p.s.i 
    Temp range -22°F to 212°F 
    Max speed 1.5ft/sec
  • 54 54Max pressure 5000 p.s.i 
    Temp range -22°F to 212°F 
    Max speed 12ft/sec
  • 56 56Max pressure 7500 p.s.i 
    Temp range -22°F to 212°F 
    Max speed 1.5ft/sec
  • 58 58Max pressure 10000 p.s.i 
    Temp range -22°F to 212°F 
    Max speed 1.5ft/sec
  • 65 65Max pressure 2500 p.s.i 
    Temp range -22°F to 212°F 
    Max speed 1.5ft/sec
  • 77 77Max pressure 6000 p.s.i 
    Temp range -22°F to 212°F 
    Max speed 1.5ft/sec
  • 83 83Max pressure 6000 p.s.i 
    Temp range -22°F to 212°F 
    Max speed 1.5ft/sec
  • 454 454Max pressure 5000 p.s.i 
    Temp range -22°F to 212°F 
    Max speed 12ft/sec
  • 455 455Max pressure 5000 p.s.i 
    Temp range -22°F to 212°F 
    Max speed 12ft/sec
  • 714 714Max pressure 7500 p.s.i 
    Temp range -40°F to 230°F 
    Max speed 6ft/sec
  • 735 735Max pressure 7500 p.s.i 
    Temp range -40°F to 250°F 
    Max speed 4.5ft/sec
  • 754 754Max pressure 7500 p.s.i 
    Temp range 40°F to 230°F 
    Max speed 3ft/sec
  • 755 755Max pressure 5000 p.s.i 
    Temp range -40°F to 230°F 
    Max speed 3ft/sec
  • 764 764Max pressure 3600 p.s.i 
    Temp range -22°F to 230°F 
    Max speed 3ft/sec
  • 770 770Max pressure 5000 p.s.i 
    Temp range -40°F to 230°F 
    Max speed 3ft/sec
  • 775 775Max pressure 5000 p.s.i 
    Temp range -22°F to 230°F 
    Max speed 3ft/sec
  • GPS GPSMax pressure 5000 p.s.i 
    Temp range -22°F to 212°F 
    Max speed 6ft/sec