The Local Manual Control Plunger Type features a local lever driven push rod that depresses a schrader check valve through the latching solenoid when fitted onto the top of the solenoid, thereby venting the pressure from the top of the piston in the cylinder valve, allowing the piston to slide upward and commence cylinder discharge.

• Use for manual actuation of cylinder
• Equipped with safety pull pin to prevent accidental discharge
• Solid brass construction
• Stainless steel operation lock-pin

Piston Actuator Assembly (P/N: UFI 61041)

• High quality brass construction
• Mounts directly on top of cylinder valves
• Self-venting

The Piston Actuator features a pneumatically driven piston that depresses a Schrader check valve, thereby venting the pressure from the top of the piston in the cylinder valve, allowing the piston to slide upward and commence cylinder discharge.  The pneumatic pressure required to operate the Piston Actuator is obtained from the “M” port of a cylinder, which is designated as “Master” cylinder that is either mechanically and/or electrically actuated.  Multiple cylinders equipped with Piston Actuators can be activated from one master cylinder using ¼” copper tubing or ¼” metal flex hose.  The Piston Actuator mounts directly to a top plug adapter, which is located on top of the cylinder valve.

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Enclosure Integrity Test

Now, the NFPA 2001, NFPA 12A, ISO 14520 and EN 15004 recognize an enclosure integrity test as part of the acceptance procedure for all clean agent systems.  This includes halocarbon and inert agents.  The comprehensive test and calculation procedure predicts how long the agent would stay in the room if it were ever discharged.

The Enclosure Integrity Test’s primary goal is to predict the enclosure’s retention time in the event that the Clean Agent Fire Suppression System is discharged.  This is accomplished by performing a Door-Fan test.

What is a Door Fan Test?

Door Fan Test, also known as a Room Integrity Fan Test, is simply a way to measure the leakage of a protected room.  A large fan is temporarily installed in the doorway of the protected room to be tested, with the fan blowing into the room (pressurizing the room).  The fan speed is adjusted to obtain flow pressure equivalent to the pressure exerted during a fire suppression system discharge.  The fan is then reversed on the door to draw air from the room (depressurizing the room).  The airflow and pressure readings obtained are entered into a computer program designed to calculate the equivalent leakage area (ELA) for the room.  Then, the software will calculate the retention time and determine whether it exceeds the minimum retention time of 10 minutes.