... Hydraulic seals usually need to be higher friction seals than pneumatic seals but often operate under lower operating speeds.3) ... cross section and the radial cross section.Hydraulic Seals – Type Piston SealsRod SealsBoth Piston & Rod SealsDust SealsBuffer RingWear RingDust ... , ROI, SPNRI, WR, BRT, RYT, DB, TAY, VB, TC Pneumatic Cylinder appropriative seal:PGY, PNY, GLY, PSD, PDU, PPY, PRY Automotive ...