... can include internal (rod seal), external (piston seal), symmetrical or axial seal. With the internal (rod) seal, the seal is fit into a housing ... function as either a rod or a piston seal. The axial seal fits axially against the housing.6) Rotary applications ... SCJY, VSB, SB2, HTBW, HSC Hydraulic pump high pressure appropriative seal:TCN,TCV Metallurgy appropriative seal: SB, MOY, MG, MG7, TC, TB, ...