Final answer:
Manual shutoff valves are crucial for controlling fluid flow in piping systems. They must be suitable for the fluid, properly sized, strategically located, made of compatible materials, and operable manually.
Step-by-step explanation:
In a piping system, the manual shutoff valves play a crucial role in controlling the flow of fluids. These valves are used to isolate sections of the piping system for maintenance, repair, or in case of emergencies. The requirements for manual shutoff valves include:
- Types of Valves: The valves used must be suitable for the type of fluid being transported. Different types of valves include ball valves, gate valves, globe valves, and butterfly valves.
- Valve Size: The size of the valves should be properly selected based on the flow rate and pressure requirements of the system.
- Valve Location: The valves should be strategically placed at appropriate junctions in the piping system to ensure easy access for operation and maintenance.
- Valve Material: The valves should be made of materials that are compatible with the fluids being transported to prevent corrosion or chemical reactions.
- Valve Operation: The valves should be manually operated, meaning they can be opened or closed by a person using a suitable method, such as a handwheel or lever.