This document describes a combination rod seal that uses a filled PTFE seal ring, energized O-ring, and two back-up rings in a compact design. The seal is suitable for high pressure and low viscosity applications in machinery such as construction and automotive equipment. The standard materials are a filled PTFE seal ring, NBR or FKM O-ring, and POM or PA back-up rings. When ordering, the part number follows the RDI designation along with the diameter and any special specifications.

1. HUNGER seals-Rod Seal GGDI - Captive Slide and O-Ring Seal -
inside sealing
Combination seal – RDI
1. Application Range & Charateritics
A filled PTFE seal ring, an energised O-Ring and two back-up rings
compact seal. Special seal surface design to suit for
high pressure and low viscosity.Concave back face design increases
contact surface, prevents the seal ring rotating with
the rod and shaft. Applied to engineering machinery,construction
machinery and automobile machinery, ect.
Design and apply according to the standard of Hunger RDI series.
2. Standard Material
Seal ring: filled PTFE
O Ring: NBR or FKM
L ring: POM or PA
3. Method of marking order number
Eg:Standard combination seal Ø100 , should be marked RDI1000.
If you need FKM O ring,please make a special instrument.