Eliminating a pulse and popping noise in a lawn mower's steering valve was done with Parker Parflex's 510C hose, seen below.
Anyone who's mowed a lawn knows that vibration comes with the territory. But this case was worse: operators on turf maintenance equipment complained of a pulse in the steering column, resulting in a “popping” noise coming from the steering valve. Steel tubing used in the application has zero dampening effect.