Sealing Systems for the Rotary Application
If applied correctly, standard Quad-Ring® Brand seals can be excellent rotary seals as compared to more expensive alternatives. They offer low friction for long life in hydraulic systems with speeds up to 900 FPM (4.5 M/Sec) and a maximum pressure of 750 psi (52 bar). Refer to this table for correct sizing of Quad-Ring® Brand seals for your application.
![](quad-ring_brand_seals.png)
This modified Quad-Ring® Brand seal has a deeper valley than the original Quad-Ring® Brand seal design, thereby producing lower deflection force value and reduced friction. Using Modified Quad-Ring® Brand seals will extend the seal life of rotary applications with pressures less than 100 psi.
![](modified_quad-ring_brand_seals.png)
For high diametrical clearance applications and those requiring low operating friction. Provides low-pressure seal up to 150 psi (10.3 bar) in reciprocating and rotary applications. The combination lobed/cup configuration can be designed with the lip on any of the four surfaces, top or bottom, on the ID or OD.
![](quad-kup_brand_seals.png)
This dual-function seal forms a self-lubricating seal and an elastomeric spring for both rotary and reciprocating applications. Newly patented, this seal design combines injection moldable thermoplastic bearing material with a Quad-Ring® Brand seal. This seal is not intended for zero leakage applications.
![](quad_pe_plus_brand_seals.png)
Each rotary application is unique, often involving media other than oil or extreme conditions of temperature, pressure, or friction. Special seals are available to meet these demanding requirements.