DESCRIPTION
The RB-F is a compact low-friction seal with the advantage of an internal anti-extrusion ring. A rubberized fabric base, which gives strength and durability, and a rubber header are molded together forming the seal. It is designed to have a controlled pre-load across the angled rubber lips to ensure a good seal at low pressure.
The seal becomes more effective as the pressure increases and the rubberized fabric deforms to the housing to increase the seal contact area. The surface of the fabric has pockets which retain lubrication to reduce friction and wear.
The RB-F has a reinforced plastic anti-extrusion ring at the internal heel of the seal to protect it against damage by extrusion and to allow a larger clearance between the rod and gland.
SEAL INFORMATION
Material Type (Primary Seal): NITRILE
Material Type (Base): FABRIC-REINFORCED NITRILE
Material Type (Support Rings): POLYACETAL
Durometer (Shore A): 80
Temperature Range (F): -22 TO 212
Max Pressure (psi): 5800
Extrusion Gap at Various Pressures (in):
- 1,500 PSI: 0.035
- 2,400 PSI: 0.032
- 3,500 PSI: 0.028
- 5,800 PSI: 0.021
Max Speed (ft/sec): 1.5
Mating Surface Roughness - Ra (µin) - DYNAMIC: 4<>16
Mating Surface Roughness - Ra (µin) - STATIC: 63 MAX
Part Number Definition (Inch): UH-(CS)(ID)(HT)RB-F
Additional Part Number Definition (Inch): 2 X 2-1/2 X 3/8 = UH-25002000375RB-F