Model: 990021014
Series 1 - T-21A cavity, EPDM, cartridge seal kit
Cavity: T-21A
Model
990021014
Technical specifications
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.
- Models: DKDS, DODS, DPBP, HVCA8, Views: A,B,C,D
- Models: FKBA, Views: A,B,C,E
- Models: DKDS, DODS, DPBP, HVCA8, Views: A,B,C,D
- Models: FKBA, Views: A,B,C,E
- Install back-up rings and O-rings as shown in views.
- See installation variations for models associated with alternative installation 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.
Technical Tips
Technical Information
What models can this kit be used with?
- CVCV Vented pilot-to-open check valve
- DKDS Normally closed, balanced poppet, logic element - pilot-to-open
- DODS Normally open, balanced poppet, logic element - pilot-to-close
- DPBP 3-way, pilot-operated, directional valve with drain to port 4 (1 to 2 open, 3 blocked)
- FKBA 2-way, pilot-shifted, proportional throttle
- HVCA8 Ventable, pilot-operated, balanced piston relief main stage with integral T-8A control cavity - before check
- PSDT Direct-acting, pressure reducing/relieving main stage piloted from port 4
- PVDA Pilot-operated, pressure reducing/relieving valve with drain to port 4
- PVDB Ventable, pilot-operated, pressure reducing/relieving valve
- RVCD Ventable, pilot-operated, balanced piston relief valve with drain to port 4
- RVCD8 Ventable, pilot-operated, balanced piston relief main stage with integral T-8A control cavity and drain to port 4
- PartDescriptionQuantityView
- 500-701-015O-Ring1D,E
- 500-701-017O-Ring2B,C
- 500-701-018O-Ring1A
- 525-006-015Backup Ring1D,E
- 525-006-016Backup Ring1C
- 525-006-017Backup Ring2B
- 525-006-018Backup Ring1A