The PSO seal type shows a double profile on the dynamic side and a surface with two small steps
on the static side, where the o-ring is housed.
The presence of the o-ring, which energizes the seal, ensures a perfect seal performance at low and
high pressure.
The special double profile avoids any Hydro-dynamic pressure on the sealing part and the
consequent blow-by effect.
The chosen material is polyurethane, with hardness according to the working pressure
(C0 o D0 o E0).
The o-ring is in NBR hardness is of 70 Shore A (N0). Compound reference: CN (or, in alternative, DN or
EN).
Remove any cutting edges and flash in the housing of the seal.
Ensure a lead-in chamfer in the bore to facilitate the piston installation.
For further information please refer to the installation instructions page 26.