Overview
U+S is a combined sealing ring. The star ring ensures the pre-compression amount under low pressure or vacuum conditions, the system pressure is transmitted to the sealing lip of the U-ring through the star ring, the U-ring is loaded with the increase of the system pressure, and the sealing effect is basically related to the temperature Regardless of the change, when the U-shaped ring is worn to a certain extent, the star-shaped ring plays a compensating role to ensure its sealing effect.
advantage
U+S has good wear resistance and anti-extrusion performance; insensitive to shock loads and pressure peaks; ideal sealing effect under no-load and low temperature conditions; suitable for harsh working environments; easy to install.
Scope of application
U+S is mainly used for sealing plungers, piston rods, air drills, telescopic cylinders, forging presses and mobile machinery and other hydraulic equipment.
technical parameter
Pressure: ≤35 Mpa, when the pressure is higher than 20MPa, it is recommended to use a retaining ring.
Temperature: -30℃ ~ +80℃
Speed: Reciprocating ≤0.8m/s
Medium: Petroleum-based hydraulic oil, emulsion, not suitable for environmentally safe hydraulic oil (bio-oil).
Material
U-ring: high-performance imported polyurethane (TPU), Shore
Hardness (SHA) 93°
Star ring: Highly elastic nitrile rubber (NBR), Shore hardness (SHA) 70°
Installation requirements
In order to ensure that the seal is not damaged during the installation process, it must be installed in strict accordance with the installation requirements of the seal.
Order example
Piston rod diameter: d=50.0mm
Ordering model: U+S 50 60 6
https://www.zxs-seal.com/piston-rod-seal-pu/