Which type of system control is emphasized for valves in NFPA 13?

The emphasis on electromechanical control for valves in NFPA 13 is due to its ability to provide reliable and efficient operation within fire protection systems. Electromechanical systems are typically more responsive and can be integrated with modern fire alarm and management systems to provide automated responses to fire detection. This integration ensures that the valves can be opened or closed quickly and accurately in the event of an emergency, enhancing the overall safety and effectiveness of the sprinkler system.

Additionally, electromechanical controls can offer advantages such as remote operation and monitoring, allowing personnel to manage the system from a safe distance. This is especially important in situations where quick action is required, as it facilitates a timely and effective response to fire hazards.

In contrast, while manual control may allow for straightforward operation, it requires intervention from a person, which may not always be timely or safe during an emergency. Hydraulic and pneumatic controls, while effective in certain applications, are less common in modern designs that focus on automation and integration. The emphasis on electromechanical systems reflects current trends towards increased reliability, safety, and efficiency in fire suppression technology as outlined in NFPA 13.