A wafer check valve is a type of check valve used in pipelines to prevent the backflow of fluid. It is called a "wafer" check valve because of its wafer-like, thin de​sign, which allows it to fit between two pipeline flanges, typically without the need for additional gaskets or bolts. Here are the key features and functions of a wafer check valve:

Valves provide several functions. Like, the valve can control the material staring in or stopping out. It also can regulating flow and pressure within the piping system. The direction of the flow also can be controlled under the pipe system. The rate of the throttling flow also can be managed. Improving safety through relieving pressure or vacuum in a piping system.

Foot valves serve an important function in maintaining hydraulic pressure and regulating water flow in pump systems. They offer several beneficial features to ensure efficient operation and prevent damage. Here are some key points about foot valves: