Composite sealing washers combine the function of a rubber seal such as an O-ring with that of a metallic washer in one bonded washer component. Their use aids in removing operational inefficiencies associated with component assembly and installation, and lessening warranty and rework costs associated with quality mistakes where visual inspection cannot assure the seal has been installed.
Composite bonded sealing washers for electric vehicle hose connection and battery cooling systems provide advantages over molded elastomer shape seals which include:
Elimination of machining costs.
Use of composite sealing technology producing the combination seal ring and the metallic washer eliminates the need for an additional seal groove and reduces costs associated with machining tight tolerance sealing grooves.
- Mistake-proof installation.
Damage to the seal due to incorrect installation or insufficient assembly forces is excluded due to the shape of the sealing ring and the defined torque levels of the screws.
- Lessen failures from quality inspection mistakes.
With composite bonded sealing washers, the externally visible metal ring enables positive visual inspection and ensures the seal has been installed. Whereas using a separate molded elastomer seal, visual inspection cannot assure the seal has been installed.
Typical applications for composite sealing washers include:
- Sealing of hose connections in electric vehicle and internal combustion automotive air conditioning systems
- Cooling systems of battery and electronic units in EV future mobility applications
Specialized materials available. For these uses, we offer special material design solutions that meet the fluid compatibility and corrosion requirements of R134a and R1234YF systems with PAG or POE oils. In addition, we offer special material solutions with good resistance against explosive decompression for cooling systems using CO2.
