A mechanical device that controls the flow of fluids through pipes and systems by opening, closing, or restricting passages.

Valve is a mechanical device that controls the flow of fluids through pipes and systems by opening, closing, or restricting passages to regulate pressure, flow rate, and direction of liquids, gases, or other flowing substances in building systems and construction applications. This fundamental plumbing and mechanical component consists of a body, closure mechanism, and actuator that work together to provide precise control over fluid flow, enabling system operation, safety protection, and performance optimization. Valves are essential components in construction projects where they control water supply, heating systems, gas distribution, fire protection, and industrial processes, making them indispensable for plumbing systems, HVAC installations, fire safety systems, and any building application where fluid flow control is necessary for proper system operation, safety, and efficiency.

Valves are utilized in various building systems and construction applications including plumbing systems where they control water flow to fixtures, appliances, and distribution networks, HVAC systems where they regulate heating and cooling fluids, refrigerant flow, and system pressures, fire protection systems where they control sprinkler operation, standpipe flow, and emergency water supplies, gas distribution systems where they safely control natural gas and propane flow to appliances and equipment, industrial processes where they manage chemical flows, steam systems, and process fluids, and specialty applications including medical gas systems, laboratory utilities, and compressed air systems. Each application requires appropriate valve types, materials, and installation methods based on fluid characteristics, pressure requirements, and safety considerations.

The types and classifications of valves include gate valves that provide full flow when open and tight shutoff when closed, ball valves that use a rotating sphere to control flow with quick quarter-turn operation, globe valves that offer precise flow control through a movable disc and seat arrangement, butterfly valves that use a rotating disc for flow control in large diameter applications, check valves that prevent backflow by allowing flow in only one direction, and pressure relief valves that automatically release excess pressure to protect systems from damage. Valve type selection depends on application requirements, flow characteristics, and operational needs.

Fun Fact: The oldest known valve dates back to ancient Rome around 100 AD, and modern automated valves can operate millions of cycles while maintaining precise flow control within 1% accuracy.

• Check Valve
• Diverter Valve
• Gate Valve