Buna-N seal kit

990511007 : Buna-N 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.

  • The shelf life for this cartridge seal kit is ten years from date of purchase. This date will be printed on the kit packaging.
Technical Data [ + ]
Series 1
Cavity T-11A
Cartridge Installation Data [ + ]
Installation Torque 30 - 35 lbf ft41 - 47 Nm
Cartridge Thread M20M20
Valve Hex Size 7/8 in.22,2 mm
Used With [ + ]

What models can this kit be used with?

  • PRDL
    Electro-proportional, direct-acting, pressure reducing/relieving valve with open transition
  • PRDM Electro-proportional, direct-acting, pressure reducing/relieving valve with open transition - high pressure setting with no command
  • PRDN Electro-proportional, direct-acting, pressure reducing/relieving valve, high pressure setting with no command
  • PRDP
    Electro-proportional, direct-acting, pressure reducing/relieving valve
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.
Additional Resources [ + ]