... moving. 7) However, a reciprocating application will need two hydraulic seals (double acting), one for each of the directions.8) The ... life of hydraulic seals is dependent on many factors including the ... HTC3, HTC5, HTC9, TCL, SCY, SCJY, VSB, SB2, HTBW, HSC Hydraulic pump high pressure appropriative seal:TCN,TCV Metallurgy appropriative seal: SB ...