A Check Valve, also known as a non-return valve or one-way valve, is a mechanical device designed to control the direction of fluid flow within a system. It consists of a valve body, which contains an opening or passage, and a movable closure element, such as a disk, ball, or flapper, that is positioned to allow flow in one direction and block it in the other.

Attributes:
• Controls hydraulic fluid flow.
• Controls fluid flow through a valve.
• Prevents backflow.

Applications:
A Check Valve is used in the hydraulic pump to ensure that fluid flows in a desired direction while preventing backflow, which can cause contamination or damage to equipment.