GS Rod Seal


The GS rod seal has been specifically developed for the challenging demands of
gas spring applications. Apart from small housings, they include long service life and
maximum gas tightness with low friction. These properties make the seal, in addition
to its use in gas springs, suitable for applications in hydraulic and pneumatic equipment that involve the same demands.
The short contact space of the sealing area guarantees low friction values. Back-up
rings or retainers are not required due to the special shape. The seal can be used in
both hydraulic and pneumatic systems with oiled air.
The GS rod seal is compatible with the time-tested C1 seal profile and fits into the
same housings.


• Good wear resistance.
• Easy installation.
• High temperature resistance in case of
suitable compound selection.
• Excellent media resistance in case of
suitable compound selection.
• Suitable compounds available for
special requirements of the chemical
process industry.
• Suitable compounds available for special requirements of the food processing
• Installation in closed and undercut

Range of application
The GS rod seal is particularly well suited for gas springs, piston rods, spindles and
valve lifters as well as for slow-running rotating unions (v ≤ 0.2 m/s).

Operating pressure 1)

Hydraulics≤ 200 bar
Gas springs≤ 200 bar
Rotary transmissions≤ 20 bar
Operating temperature-35 °C to +90 °C

Sliding speed

Hydraulics≤ 1 m/s
Gas springs≤ 1 m/s
Rotary transmissions≤ 0.2 m/s
Recommendation for rotary transmissions: P × v ≤ 3
(For definition see catalogue „Hydraulic Seals“, chapter „Rotary Seals“, introduction).

1) Dependent upon cross-section and compound.
Standard: P5008, TPU (≈ 94 Shore A).
For high pressures (> 200 bar): P6000, TPU (≈ 94 Shore A).
For low temperatures (> –55 °C): P5009, TPU (≈ 93 Shore A).
For high temperatures (< 120 °C): P4300, TPU (≈92 Shore A).
Profile GS rod seals are manufactured with an oversized outer diameter, which results
in the required secure press fit on the adhesion part. The sealing lip only achieves the
require size during installation. GS rod seals can be easily snapped into the housing
by deforming them in the shape of a kidney.
When selecting the seal for a certain diameter the seal with the largest possible crosssection should be given preference.
In the case of nominal diameters ≤ 25 mm, depending on the seal’s cross-section and
position of the installation groove, an open housing is recommended.
For applications in gas springs – as opposed to the general installation guidelines
contained in our catalogues – we recommend housings with improved surface requirements.
Dynamic sealing: R
z < 0,5 µm
Static sealing: R
z < 1,0 µm
Percentage of contact area: t
p> 80 %