The BWA/N rod seal with wiper is made of NBR 80 Shore A compound has been developed to operate where the machining tolerances of the seat aren’t in the correct range of roughness tolerance.
The dynamic lip presents a radius allowing to slide at very low pressure.
The seal has also a scraping lip stopping the outside impurities.
The static lip includes some notches acting as seal stabilizers in case of quick inertial direction changes.
Standard material is a compound NBR 80 Shore A.
For different applications, HNBR, EPDM, FKM and VMQ compounds can be also supplied.
Remove sharp edges and protrusions on the cylinder head to avoid damages of the seal during the assembling. Grease the seal on the piston before fitting.