What are the components of the pump unit assembly of a handheld compressed air sprayer?

The correct choice highlights the essential components that make up the pump unit assembly of a handheld compressed air sprayer. This assembly is crucial for the operation of the sprayer, as it is the mechanism that builds pressure within the tank, allowing for effective and efficient spraying of the liquid substance.

The handle is used to operate the pump, while the tank cap seals the tank and helps maintain pressure. The inclusion of the gasket ensures a tight seal to prevent leaks. The pump rod is essential for transferring the pumping action to the plunger cup, which then creates the necessary pressure to push the liquid out through the nozzle. The check valve is a critical component that prevents backflow of the liquid, ensuring that the pressure is maintained and that the liquid only flows in one direction—outward when the nozzle is activated.

This detailed assembly is fundamental for ensuring that the sprayer operates effectively, providing a controlled and consistent spray pattern. Understanding these components helps in troubleshooting and maintaining the sprayer for optimal performance.