Series 3 - T-17A cavity, buna-N, cartridge seal kit

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.

What models can this kit be used with?

• CBFA 3:1 pilot ratio, restrictive counterbalance valve
• CBFB 1.5:1 pilot ratio, semi-restrictive counterbalance valve
• CBFC 3:1 pilot ratio, semi-restrictive counterbalance valve
• CBFD 4.5:1 pilot ratio, semi-restrictive counterbalance valve
• CBFG 4.5:1 pilot ratio, restrictive counterbalance valve
• CBFL 2.3:1 pilot ratio, semi-restrictive counterbalance valve
• CBGA 3:1 pilot ratio, standard capacity counterbalance valve
• CBGB 1.5:1 pilot ratio, standard capacity counterbalance valve
• CBGG 4.5:1 pilot ratio, standard capacity counterbalance valve
• CBGH 10:1 pilot ratio, standard capacity counterbalance valve
• CBGL 2.3:1 pilot ratio, standard capacity counterbalance valve
• CBGY 2:1 pilot ratio, standard capacity counterbalance valve
• CKGB Pilot-to-open check valve with standard pilot
• CKGD Pilot-to-open check valve with sealed pilot
• CKGV Vented pilot-to-open check valve - atmospherically referenced
• CNGD Free flow side to nose check valve with bypass orifice and port 3 blocked
• CNGE Pilot-to-open check valve with bypass orifice
• CNHE Pilot-to-close check valve with bypass orifice
• COHA Pilot-to-close check valve
• CXGE Free flow side to nose check valve with port 3 blocked
• CXHC Free flow nose to side check valve with port 3 blocked
• DKHC Normally closed, balanced poppet, logic element - pilot-to-open
• DKHD Normally closed, balanced poppet, logic element - vent-to-open
• DOHC Normally open, balanced poppet, logic element - pilot-to-close
• DOHD Normally open, balanced poppet, logic element - vent-to-close
• FREA Fixed-orifice, bypass/restrictive, priority, flow control valve
• LKHC Pilot-to-open, spring-biased closed, unbalanced poppet logic element
• LKHCZ Pilot-to-open, spring-biased closed, unbalanced poppet logic element with position switch
• LOGCZ Pilot-to-close, spring-biased closed, unbalanced poppet logic element with metering notches and position switch
• LOHA Vent-to-open, spring-biased closed, unbalanced poppet logic element with pilot source from port 1
• LOHA8 Vent-to-open, spring-biased closed, unbalanced poppet logic element with pilot source from port 1 and integral T-8A control cavity
• LOHB Vent-to-open, spring-biased closed, unbalanced poppet logic element with pilot source from port 2
• LOHB8 Vent-to-open, spring-biased closed, unbalanced poppet logic element with pilot source from port 2 and integral T-8A control cavity
• LOHC Pilot-to-close, spring-biased closed, unbalanced poppet logic element
• LOHCZ Pilot-to-close, spring-biased closed, unbalanced poppet logic element with position switch
• LOHD Vent-to-open, spring-biased closed, unbalanced poppet logic element with pilot source from port 1 or 2
• LOHD8 Vent-to-open, spring-biased closed, unbalanced poppet logic element with pilot source from port 1 or 2 and integral T-8A control cavity
• LOHO Pilot-to-close, spring-biased open, unbalanced poppet logic element
• LOHOZ Pilot-to-close, spring-biased open, unbalanced poppet logic element with position switch
• LPHA Normally open, modulating element with pilot source from port 1
• LPHC Normally open, modulating element
• LRHA Normally closed, modulating element with pilot source from port 1
• LRHC Normally closed, modulating element
• PBHB Pilot-operated, pressure reducing valve
• PBHB8 Pilot-operated, pressure reducing main stage with integral T-8A control cavity
• PBHC Air-controlled, pilot-operated, pressure reducing valve
• PBHF Pilot-operated, pressure reducing valve with drilled piston orifice
• PBHF8 Pilot-operated, pressure reducing main stage with drilled piston orifice and integral T-8A control cavity
• PPHB Pilot-operated, pressure reducing/relieving valve
• PPHB8 Pilot-operated, pressure reducing/relieving main stage with integral T-8A control cavity
• PPHC Air-controlled, pilot-operated, pressure reducing/relieving valve
• PPHF Pilot-operated, pressure reducing/relieving valve with drilled piston orifice
• PPHF8 Pilot-operated, pressure reducing/relieving main stage with drilled piston orifice and integral T-8A control cavity
• PRHB Direct-acting, pressure reducing/relieving valve
• PRHR Direct-acting, pressure reducing valve
• RSHC Pilot-operated, balanced piston sequence valve
• RSHC8 Pilot-operated, balanced piston sequence main stage with integral T-8A control cavity
• RSHE Air-controlled, pilot-operated, balanced piston sequence valve
• RVGA Ventable, pilot-operated, balanced piston relief valve
• RVGB Normally closed modulating element valve with relief function
• SCGA Direct-acting sequence valve with reverse flow check
• SQHB Kick-down, pilot-operated, balanced piston sequence valve
• XHBA Port 1 to 3 open, port 2 blocked cavity plug
• XHCA All ports blocked cavity plug
• XHOA Port 1 to 2 open, port 3 blocked cavity plug
• XHOAE Ports 1 and 2 to external port, port 3 blocked cavity plug
• XHOB All ports open cavity plug
• XHOC T-17A cavity to T-11A cavity converter

• Install back-up rings and O-rings as shown in views.
• When installing continuous back-up rings, use the same technique and the same care used to install O-rings.
• When installing cartridge - be sure to torque to recommended value.

• Seals: Materials of Construction
• Seal Kit Installation Guidelines
• Sun's Floating Style Screw-In Cartridge (1.06 MB)