Valve

A gate valve, also known as a sluice valve, is a valve that opens by lifting a round or rectangular gate/wedge out of the path of the fluid. The distinct feature of a gate valve is the sealing surfaces between the gate and seats ...

A check valve , clack valve , non-return valve or one-way valve is a mechanical device , a valve , which normally allows fluid ( liquid or gas ) to flow through it in only one direction. Check valves are two-port ...

A butterfly valve is a type of flow control device, typically used to regulate a fluid flowing through a section of pipe. The valve is similar in operation to a ball valve. A flat circular plate is positioned in the center ...