Head Valve

A head valve is used for isolation and is placed at the branch of lines or a manifold.  It is a valve that is located at the top or head of a system, usually a pipeline, tank, or vessel, and is used primarily for the purpose of isolating or shutting off the flow of fluid within the system.

Key Points about head valve

• Location  -  The valve is situated at the top or head of the system, often near the highest point of the pipeline or vessel.
• Isolation Function  -  The primary function of the head valve is to provide a means of isolating or shutting off the flow of fluid within the system.  This could be necessary for maintenance, repair, or safety reasons.
• Control  -  While the valve is primarily for isolation purposes, it may also allow for some degree of control over the flow of fluid when it's open.  This can be useful for regulating flow or pressure within the system.
• Type  -  The specific type of valve used as a head valve for isolation can vary depending on the requirements of the system.  Common types include gate valves, globe valves, ball valves, or butterfly valves.

Overall, a head valve for isolation serves as an component in fluid control systems, providing a means of safely shutting off the flow of fluid when needed for maintenance, repair, or other purposes.