UPH Packings for Piston Seal and Rod Seal | What UPH Type Packings for Piston Seal and Rod Seal ? NOK SEAL HYDRAULIC | A2Z SEALS
Product Description
· Usable for both piston seal and rod seal.
▪ Designed with a large cross-section so that it can be used for wide range of applications.
· Nitrile rubber and fluorine rubber are available, so it can be used in a wide range of temperature conditions.
▪ Wide range of sizes are available.
R = 0.3 or below, R1 = 0.5 or below
The surface of the rod should be finished by buffing (SPBF) to 0.8 to 1.6 μmRz (0.2 to 0.4 μmRz).
● The roughness is JIS B 2601 : 2001. When regulation length cannot be kept, apply Pt.
NOK OIL SEAL
Nok oil seal is a mechanical component used to seal oil. It isolates the parts of the transmission component that need to be lubricated from the output components so that lubrication and leakage are not allowed.
How to Determine B dimension
■ When using backup ring. Please determine B dimension according to the table below.
| Maximum Service Pressure | 15MPa | 32MPa | |
| Material of Backup ring | 19YF | ||
| B dimension | For Rod seals | B ≦ ø D + 1.0 | B ≦ ø D + 0.5 |
| For Piston seals | B ≦ ø D – 1.0 | B ≦ ø D – 0.5 | |
■ When not using backup ring.
To determine B dimension, please refer to the graph in the right for the maximum extrusion gap (one side)
considering the eccentricity of operating condition of the piston or rod.
Specification Table
UPH type Nitrile rubber (NBR), Fluoro rubber (FKM)
Material : Standard NOK A505 / Heat Resistance type NOK F357
Note: The Part number and the one stamped on the product might be different in case of heat resistance type.UPH type Packing for Both Piston and Rod seals
[Large size dimension table]