

U-cup fluid stem seal designed to prevent leakage and maintain consistent pressure control in Graco airless spray system fluid assemblies.
The Graco 17Z163 Seal, U-Cup, Fluid Stem is a precision sealing component designed to maintain fluid integrity within Graco spray equipment. It prevents leakage around the fluid stem while ensuring smooth and controlled material flow during spraying operations.
Engineered for durability and chemical resistance, this U-cup seal supports consistent spray performance in demanding contractor and industrial environments where fluid control accuracy is critical.
The Graco 17Z163 is an OEM U-cup seal used on fluid stems in airless spray systems. Its primary role is to create a tight sealing interface that prevents coating material from leaking while allowing smooth stem movement during spray operation.
It is commonly found in Graco spray guns and fluid control assemblies, where precise sealing is required to maintain pressure stability and consistent spray patterns over extended use.