elastomer wiper with a sharply-defined lip edge and metal housing. the two parts are vulcanized in a single unit.


not bolded symbols; please consult our technical for application limitations

category of profile

molded/standard/trade product or machined with minor design change.

single acting

area of application: hydraulics & pneumatics

hydraulic and pneumatic systems, reciprocal movements, medium dirt load.


the WR 03-A is a single function wiper. It is pressed against the descending piston rod wiping the dirt from the surface of the rod. the seals, their associated elements and the hydraulic medium are protected from dirt. the metal angle ring with its additional press fit on the outer circumference, ensure the functionally correct fit of the wiper in the housing.


hydraulic oils acc. to DIN 51524/51525, lubricating oils, other mineral oil based fluids and HFA, HFB, HFC highly non-flammable hydraulic fluids acc. to VDMA 24317.

the stated operation conditions represent general indications. it is recommended not to use all maximum  values simultaneously. surface speed limits apply only to the presence of adequate lubrication film.

surface quality

surface roughness

Rtmax (μm)

Ra (μm)

sliding surface according to seal data
bottom of groove ≤6,3 ≤1,6
groove face ≤15 ≤3

tolerance recommendation

seal housing tolerances
ØD h8

fitting & installation

the wiper is easily built in to split housing, provided  the lead-in chamfer is in accordance with the table below:

H [mm] chamfer [mm] with angle 20⁰
≤ 4,5 0,6
5 0.6
6 0.8
7 0.8
8 1
9 1
10 1.4
12 1.8
14 2
16 2.4

seal & housing recommendations

please note that we are able to produce those profiles to your specific need or any non standard housing. for detail measurements, please see jet seal pars catalog…

don’t hesitate to contact our technical department for further information or for special requirements (temperature, speed etc.), so that suitable materi- als and/or designs can be recommended.