The valves found on large construction projects can vary depending on the specific type of project and the systems involved. However, here is a comprehensive list of some common valves and their typical uses in large construction projects:

Gate Valve: Used to control the flow of fluid (water, gas, oil) by raising or lowering a gate-like disc. It provides a tight shut-off and is suitable for on/off control.

Ball Valve: A quarter-turn valve with a spherical disc that allows or blocks flow when the hole aligns with the pipe. It is commonly used for on/off and throttling control.

Globe Valve: Used for regulating flow by moving a disc against the flow path. It offers good throttling control but has higher pressure drop compared to other valves.

Butterfly Valve: A quarter-turn valve with a disc that pivots to control flow. It is useful for large diameter pipelines and offers quick shut-off.

Check Valve: Allows flow in one direction and prevents backflow. Commonly used to prevent reversal of flow and protect pumps and equipment.

Pressure Relief Valve (PRV): Automatically releases excess pressure from a system to prevent over-pressurization and potential damage.

Pressure Reducing Valve (PRV): Reduces the pressure in a system to a set level, maintaining a steady downstream pressure.

Control Valve: Used to regulate the flow, pressure, or temperature of a fluid in a system to maintain desired operating conditions.

Plug Valve: Consists of a cylindrical or conical plug that rotates to control flow. It provides low-pressure drop and quick operation.

Needle Valve: Has a slender, tapered point at the end of a valve stem, allowing precise flow control, often used in instrumentation systems.

Diaphragm Valve: Uses a flexible diaphragm to control flow. Suitable for handling corrosive and abrasive fluids.

Solenoid Valve: Operated electronically using a solenoid, it is commonly used in automation and control systems.

Foot Valve: Placed at the bottom of a suction pipe in a pump to prevent the fluid from draining back when the pump is not in use.

Wafer Check Valve: A check valve designed to fit between two flanges, eliminating the need for a separate valve body.

Pressure Sustaining Valve: Maintains a set pressure in a portion of a system by releasing excess pressure when needed.

Float Valve: Used to control the water level in tanks or reservoirs by opening or closing based on the liquid level.

Mixing Valve: Combines two or more fluids at a controlled ratio, often used in heating and cooling systems.

Zone Valve: Used in heating and cooling systems to control the flow of water or air to specific zones or areas.

Remember that the specific selection and usage of valves depend on the requirements of each project, the type of fluid being controlled, and the desired system operation. Always consult with a qualified engineer or expert to determine the appropriate valves for your construction project.”