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Model

990303002

Model: 990303002

Series 2 - T-3A cavity, Polyurethane and buna-N cartridge seal kit

Cavity: T-3A

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Model

990303002

See CAD Files tab below to request images.

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.

  • 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.
  • Cavity
  • Series
  • Cartridge Thread
    1"-14 UNS
  • Installation Torque
    45 - 50 lbf ft
  • Valve Hex Size
    1 1/8 in.

What models can this kit be used with?

  • RDFA Direct-acting relief valve
  • RDFA3 Non-adjustable direct-acting relief valve
  • RPGS Pilot-operated, balanced poppet relief valve
  • RPGS8 Pilot-operated, balanced poppet relief main stage with integral T-8A control cavity
  • RPGT Anti-Shock, pilot-operated, balanced poppet relief valve
  • RBFA Bi-directional direct-acting relief valve
  • 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.
  • After installing the GLYD® Ring, size it to restore original shape and to prevent damage during cartridge installation.
  • When installing cartridge - be sure to torque to recommended value.
  • GLYD® Ring is a registered trademark of W. S. Shamban and Co., Los Angeles, CA, USA
  • Part
    Description
    Quantity
    View
  • 500-001-017
    O-Ring
    1
    B
  • 500-202-020
    O-Ring
    1
    A
  • 530-102-018
    Glyd Ring
    1
    B
  • 540-002-020
    Backup Ring
    1
    A

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