Series 4 - T-18A cavity, EPDM, cartridge seal kit

990018014 : Series 4 - T-18A cavity, EPDM, cartridge seal kit
Technical Features [ + ]

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.

  • EPDM seals have no limited shelf life.
  • EPDM seals are purple in color for easy stock and field identification.
Technical Data [ + ]
Series 4
Cartridge Thread M48M48
Valve Hex Size 1 5/8 in.41,3 mm
Valve Installation Torque 350 - 375 lbf ft474 - 508 Nm
Cavity T-18A
Used With [ + ]

What models can this kit be used with?

  • CXID Free flow side to nose check valve
  • CXJA Free flow nose to side check valve
  • CXKA Free flow nose to side check valve
  • DFFA8 2-way, poppet directional valve with integral T-8A control cavity - control 1-2
  • DFFB
    2-way, 2-stage, solenoid-operated directional poppet valve - flow 2-1
  • FDFA Fully adjustable pressure compensated flow control valve with reverse flow check
  • FLJA Filter
  • FXFA Fixed-orifice, pressure compensated flow control valve
  • NCGB Fully adjustable needle valve with reverse flow check
  • NFFC Fully adjustable needle valve
  • NFFD Fully adjustable needle valve
  • RPKC Pilot-operated, balanced piston relief valve
  • RPKC8 Pilot-operated, balanced piston relief main stage with integral T-8A control cavity
  • XKCA All ports blocked cavity plug
  • XKOA All ports open cavity plug
Notes [ + ]
  • 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.
  • Cartridges with EPDM seals are for use in systems with phosphate ester fluids. Exposure to petroleum based fluids, greases and lubricants will damage the seals.
Additional Resources [ + ]