Discharge valves in clean agent suppression systems are actuated by what mechanism?

Discharge valves in clean agent suppression systems are actuated by what mechanism?

• A. Electric solenoid
• B. Pneumatic actuator
• C. Manual lever
• D. Pilot pressure

Answer: (D)

Discharge valves are operated by pilot pressure. In a pilot-operated design, a small, controlled pressure is applied to a pilot chamber (often acting on a diaphragm or piston) to shift the main valve from the closed to the open position. When a release command is issued, the release system directs gas into the pilot line, building pressure that moves the diaphragm/piston and opens the main valve, allowing the clean agent to discharge. Without pilot pressure, the spring mechanism keeps the valve closed, making the system fail-safe. This approach lets the control electronics handle the initiation while the actual valve actuation relies on a relatively small, reliable pressure signal.

Discharge valves are operated by pilot pressure. In a pilot-operated design, a small, controlled pressure is applied to a pilot chamber (often acting on a diaphragm or piston) to shift the main valve from the closed to the open position. When a release command is issued, the release system directs gas into the pilot line, building pressure that moves the diaphragm/piston and opens the main valve, allowing the clean agent to discharge. Without pilot pressure, the spring mechanism keeps the valve closed, making the system fail-safe. This approach lets the control electronics handle the initiation while the actual valve actuation relies on a relatively small, reliable pressure signal.