... operate under lower operating speeds.3) The sealing orientation for hydraulic seals can include internal (rod seal), external (piston ... application is moving. 7) However, a reciprocating application will need two hydraulic seals (double acting), one for each of the ... , HTC9, TCL, SCY, SCJY, VSB, SB2, HTBW, HSC Hydraulic pump high pressure appropriative seal:TCN,TCV Metallurgy appropriative seal: SB ...