Sun offers replacement seal kits for all cartridge models. These kits include all of the external seals on the cartridge along with installation instructions. Seal kits are available in Buna-N and Viton for all models, along with EPDM and polyurethane for many models. Please note: Converting the external seals from one material to another does not ensure fluid compatibility with that material due to the existence of internal seals within the cartridge.

• The shelf life for this cartridge seal kit is ten years from date of purchase. This date will be printed on the kit packaging.
• Polyurethane seals have a higher tensile strength, are more abrasion/extrusion resistant, and are well suited for high cycle and high pressure applications.

What models can this kit be used with?

• CBDA 3:1 pilot ratio, restrictive counterbalance valve
• CBDAX Fixed setting, 3:1 pilot ratio, restrictive counterbalance valve
• CBDB 1.5:1 pilot ratio, semi-restrictive counterbalance valve
• CBDBX Fixed setting, 1.5:1 pilot ratio, semi-restrictive counterbalance valve
• CBDC 3:1 pilot ratio, semi-restrictive counterbalance valve
• CBDCX Fixed setting, 3:1 pilot ratio, semi-restrictive counterbalance valve
• CBDD 4.5:1 pilot ratio, semi-restrictive counterbalance valve
• CBDDX Fixed setting, 4.5:1 pilot ratio, semi-restrictive counterbalance valve
• CBDG 4.5:1 pilot ratio, restrictive counterbalance valve
• CBDGX Fixed setting, 4.5:1 pilot ratio, restrictive counterbalance valve
• CBDHX Fixed setting, 10:1 pilot ratio, restrictive counterbalance valve
• CBDL 2.3:1 pilot ratio, semi-restrictive counterbalance valve
• CBEA 3:1 pilot ratio, standard capacity counterbalance valve
• CBEAX Fixed setting, 3:1 pilot ratio, standard capacity counterbalance valve
• CBEB 1.5:1 pilot ratio, standard capacity counterbalance valve
• CBEG 4.5:1 pilot ratio, standard capacity counterbalance valve
• CBEH 10:1 pilot ratio, standard capacity counterbalance valve
• CBEL 2.3:1 pilot ratio, standard capacity counterbalance valve
• CBEY 2:1 pilot ratio, standard capacity counterbalance valve
• CKEB Pilot-to-open check valve with standard pilot
• CKED Pilot-to-open check valve with sealed pilot
• CKEV Vented pilot-to-open check valve - atmospherically referenced
• CNED Free flow side to nose check valve with bypass orifice and port 3 blocked
• CNEE Pilot-to-open check valve with bypass orifice
• CNFE Pilot-to-close check valve with bypass orifice
• COFA Pilot-to-close check valve
• COFO 120:1 ratio, pilot-to-close check valve
• CXEE Free flow side to nose check valve with port 3 blocked
• CXFC Free flow nose to side check valve with port 3 blocked
• DKFC Normally closed, balanced poppet, logic element - pilot-to-open
• DKFD Normally closed, balanced poppet, logic element - vent-to-open
• DOFC Normally open, balanced poppet, logic element - pilot-to-close
• DOFD Normally open, balanced poppet, logic element - vent-to-close
• DPCA 2-way, pilot-operated, directional valve with internal drain to port 3 - normally open
• DPCB 2-way, pilot-operated, directional valve with internal drain to port 3 - normally closed
• DPCC 3-way, pilot-operated, directional valve with internal drain to port 3 (1 blocked, 2 to 3 open)
• DPCD 3-way, pilot-operated, directional valve with internal drain to port 3 (1 to 2 open, 3 blocked)
• DRCC 3-way, direct-acting, directional valve with internal drain to port 3 (1 blocked, 2 to 3 open)
• DVCA 2-way, vent-to-operate, directional valve with internal drain to port 3 and integral T-8A control cavity - normally open
• DVCB 2-way, vent-to-operate, directional valve with internal drain to port 3 and integral T-8A control cavity - normally closed
• DVCC 3-way, vent-to-operate, directional valve with internal drain to port 3 and integral T-8A control cavity (1 blocked, 2 to 3 open)
• DVCD 3-way, vent-to-operate, directional valve with internal drain to port 3 and integral T-8A control cavity (1 to 2 open, 3 blocked)
• FRDA Fixed-orifice, bypass/restrictive, priority, flow control valve
• LKFC Pilot-to-open, spring-biased closed, unbalanced poppet logic element
• LKFCZ Pilot-to-open, spring-biased closed, unbalanced poppet logic element with position switch
• LOECZ Pilot-to-close, spring-biased closed, unbalanced poppet logic element with metering notches and position switch
• LOFA Vent-to-open, spring-biased closed, unbalanced poppet logic element with pilot source from port 1
• LOFA8 Vent-to-open, spring-biased closed, unbalanced poppet logic element with pilot source from port 1 and integral T-8A control cavity
• LOFB Vent-to-open, spring-biased closed, unbalanced poppet logic element with pilot source from port 2
• LOFB8 Vent-to-open, spring-biased closed, unbalanced poppet logic element with pilot source from port 2 and integral T-8A control cavity
• LOFC Pilot-to-close, spring-biased closed, unbalanced poppet logic element
• LOFCZ Pilot-to-close, spring-biased closed, unbalanced poppet logic element with position switch
• LOFD Vent-to-open, spring-biased closed, unbalanced poppet logic element with pilot source from port 1 or 2
• LOFD8 Vent-to-open, spring-biased closed, unbalanced poppet logic element with pilot source from port 1 or 2 and integral T-8A control cavity
• LOFO Pilot-to-close, spring-biased open, unbalanced poppet logic element
• LOFOZ Pilot-to-close, spring-biased open, unbalanced poppet logic element with position switch
• LPFA Normally open, modulating element with pilot source from port 1
• LPFC Normally open, modulating element
• LPFCL Tuneable, normally open modulating element
• LRFA Normally closed, modulating element with pilot source from port 1
• LRFC Normally closed, modulating element
• LRFCL Tuneable, normally closed, modulating element
• MAEP Atmospherically referenced LoadMatch™ counterbalance valve
• MBEA 3:1 pilot ratio, load reactive, load control valve
• MBEAX Fixed setting, 3:1 pilot ratio, load reactive, load control valve
• MBEB 1.5:1 pilot ratio, load reactive, load control valve
• MBEBX Fixed setting, 1.5:1 pilot ratio, load reactive, load control valve
• MBEG 4.5:1 pilot ratio, load reactive, load control valve
• MBEGX Fixed setting, 4.5:1 pilot ratio, load reactive, load control valve
• MBEM Balanced, load control valve
• MBEP LoadMatch™ counterbalance valve
• PBFB Pilot-operated, pressure reducing valve
• PBFB8 Pilot-operated, pressure reducing main stage with integral T-8A control cavity
• PBFC Air-controlled, pilot-operated, pressure reducing valve
• PBFF Pilot-operated, pressure reducing valve with drilled piston orifice
• PBFF8 Pilot-operated, pressure reducing main stage with drilled piston orifice and integral T-8A control cavity
• PPFB Pilot-operated, pressure reducing/relieving valve
• PPFB8 Pilot-operated, pressure reducing/relieving main stage with integral T-8A control cavity
• PPFC Air-controlled, pilot-operated, pressure reducing/relieving valve
• PPFF Pilot-operated, pressure reducing/relieving valve with drilled piston orifice
• PPFF8 Pilot-operated, pressure reducing/relieving main stage with drilled piston orifice and integral T-8A control cavity
• PRFB Direct-acting, pressure reducing/relieving valve
• PRFR Direct-acting, pressure reducing valve
• RSFC Pilot-operated, balanced piston sequence valve
• RSFC8 Pilot-operated, balanced piston sequence main stage with integral T-8A control cavity
• RSFE Air-controlled, pilot-operated, balanced piston sequence valve
• RSFS Pilot-operated, balanced poppet sequence valve
• RSFS8 Pilot-operated, balanced poppet sequence main stage with integral T-8A control cavity
• RVEA Ventable, pilot-operated, balanced piston relief valve
• RVEB Normally closed modulating element valve with relief function
• RVES Ventable, pilot-operated, balanced poppet relief valve
• RVET Anti-Shock, ventable, pilot-operated, balanced poppet relief valve
• SCEA Direct-acting sequence valve with reverse flow check
• SDFT Anti-Shock, pilot-operated, balanced poppet sequence valve with drain to port 3
• SQFB Kick-down, pilot-operated, balanced piston sequence valve
• SXEA Direct-acting sequence valve without reverse flow check
• XBAA Port 2 to 3 open, port 1 blocked cavity plug
• XBBA Port 1 to 3 open, port 2 blocked cavity plug
• XBCA All ports blocked cavity plug
• XBOA Port 1 to 2 open, port 3 blocked cavity plug
• XBOB All ports open cavity plug
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