Piston Seal – Single Acting – OR Energizer



High-temperature resistance

Low wear

Extrusion resistant

Compatible with a wide range of media

Available in diameters up to 2100 mm


The 281 Series Single-Acting Piston seal is ideal for high-pressure sealing applications, offering low-friction performance and single-acting operation.

Typical applications include:

  • Rolling Mills
  • Injection Molding Machines
  • Agricultural Hydraulics
  • Hydraulic Presses
  • Mobile Hydraulics

System Seal’s custom blended PTFE filled compounds provide ultra-low friction and high-speed performance with minimal wear. The standard compounds are PTFE filled with Bronze filler, or PTFE filled with Glass-Moly. The temperature range of the seal can be increased by selecting an FPM energizer in place of the standard NBR energizer.

Material Code
PTFE Bronze Compound + NBR O-ring MT23
PTFE Bronze Compound + FPM O-ring MT26
PTFE Glass MoS2 Compound + NBR O-ring MT83
PTFE Glass MoS2 Compound + FPM O-ring MT86
Temperature MT23
°F MT83
hydraulic oil -30…+100 -22…+212 -30…+100 -22…+212
water oil emulsions (HFA) -…- -…- +5…+60 +40…+140
water-glycol fl uids (HFC) -…- -….- -30…+600 -22…+140
polyol esters (HFD)
water -…- -…- -5…+100 +40…+212
Speed 5 m/s (16.5 ft/sec)
Pressure 400 bar (6000 psi)

Note:for other materials or fluids please contact our engineering department.

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Learn more about System Seals

Download the System Seals Steel and Metal Processing catalog to learn more about our proprietary seals and how we help steel and aluminum mills save millions of dollars in uptime and productivity.