Manual valve

Manual valve is a type of valve that is operated by hand rather than by an automated or electrical system. It is typically used in situations where precise control over the flow of fluids, gases, or other materials is necessary, and where automation or electricity may not be available or practical.

Manual valves come in a variety of designs and sizes, and can be used for a wide range of applications, including industrial processes, plumbing systems, HVAC systems, and more. Some common types of manual valves include ball valves, gate valves, globe valves, and needle valves.

To operate a manual valve, the user must turn a handle or knob to open or close the valve. This allows the user to precisely control the flow of fluids or gases through the valve, and to quickly shut off the flow if necessary. Manual valves are generally easy to operate and maintain, and are often preferred in situations where reliability and simplicity are important.