Firecycle Systems
On-off cycling systems to minimize water damage.

Firecycle III is a unique fire protection system that will sense and respond to a fire condition, delivering fire suppression when needed, but sparing excess water damage to valuable assets in the event of fire.

Federal Aviation Administration (FAA)

Owner: U. S. Government


The Federal Aviation Administration has made a long-term commitment to capital investment to ensure it continues to provide the best air traffic control service in the world. The largest and most crucial component of the national airspace system in the United States is its air route traffic control centers. These high technology facilities demand operational stability and minimal system disruption in any emergency. The FAA operates a national network of airport towers, air route traffic control centers, and flight service stations. It develops air traffic rules, allocates the use of airspace and provides for the security control of air traffic.

Products Used

Firecycle II and III

Benefits of Firecycle

  • Provides protection only when needed.
  • Avoids needless water damage by self regulation, turning itself on and off in response to fire conditions.
  • Fail-safe detection system.
  • Design guards against accidental tripping.

Firecycle III Cycling Deluge System

Firecycle III Cycling Wet Pipe System

Firecycle’s on-off multicycle ability is ideal for the protection of fine art, artifacts, computer components and data storage. A Firecycle system’s automatic shut-off can also reduce the amount of run-off of toxic chemicals caused by excess sprinkler water discharge in a manufacturing and processing plant environment.

It’s detection system stops the flow of water once the fire has been contained and restarts the flow in the event that the fire re-ignites.

The unique Firecycle III is available in single and double interlock preaction, wet and deluge system options. All units have UL Listing and the Firecycle III cycling wet and single interlocked preaction units have FM Approval. The solid-state design reduces system size without compromising performance, ease of installation and maintenance.


Firecycle III System - Cycling Single Interlock

When the detector (1) is activated by fire, a signal is sent to the Firecycle III Control Panel (2). The panel sends the appropriate alarm and trouble signals and, at the same time, powers the normally open (3) and normally closed (4) solenoid valves, isolating the pneumatic actuator (5) and releasing pressure from the priming chamber. The priming chamber (6) of the deluge valve is then vented faster than water is supplied through the restricted orifice (7), allowing the flow control valve to open. The water enters the system piping, but no water is discharged until a sprinkler (8) activates. After the detectors cool and the timer is satisfied, the normally closed solenoid is allowed to close and restablish prime pressure, closing the control valve and stopping the flow of water. If the detector senses a flare-up of the fire, the cycle begins again. If the detector never cools completely, or is damaged, the system will continue to discharge water.

Note: In "Double Interlock" mode, operation of the detection system combined with loss of air pressure at the supervisory switch will open the normally closed solenoid valve. This then trips the automatic control valve.