Publish Time: 2021-08-20 Origin: Site
The fire extinguisher valve has many advantages. However, fire extinguisher valves also require regular maintenance and periodic servicing.
As a valve manufacturer with 30 years of experience, we have various sales and production experience of fire extinguisher valves. If you have any questions or needs, please contact us directly. Here is the information I found about the fire extinguisher valve.
Yes, fire extinguisher valve check valves require periodic inspection and maintenance. Therefore, NFPA 13 warns against burying check valves or placing them in areas that are out of reach. Alarm check valves and system riser check valves require more frequent inspection. Periodic inspections help verify that the valve flaps are functioning properly, that the valve seats are in good condition, and that there are no visible signs of corrosion or clogging. Alarm valves and system riser check valves should be externally inspected quarterly and should verify the following.
(1) Pressure gauge indications to maintain normal water supply pressure.
(2) Valves and valve internals are free of physical damage.
(3) All valves are in the proper open or closed position.
(4) There are no leaks in the reduction chamber or alarm drains.
It is best to inspect the alarm and check valve internals of the fire extinguisher valve every five years. The system should be drained to perform an internal inspection of the valve assembly in the following manner.
(1) Close the control valve.
(2) Open the main drain valve.
(3) Open the inspector's test valve.
(4) Wait until the draining sound stops and all pressure gauges indicate 0 psi (0 bar) before removing the hand hole cover or disassembling any parts. Maintenance should follow the guidelines set by the manufacturer. After inspection, the system should be returned to service using the manufacturer's guidelines.
Turn off the ventilation fans serving the space or stop the machinery in the space. The carbon dioxide concentration must reach 34% to extinguish a fire. It will not work if it is diluted by the air blown into the ventilation system or vented by the machine.
After the system is vented, close the dampers or doors to keep the gas in the space.
Audible alarm so personnel can leave the mold space before the system is discharged. Since the C0 concentration is sufficient to cause asphyxiation and sufficient to extinguish a fire, personnel must be warned to leave the premises before inhaling the gas. This warning is given by an electric or C0 motor-driven alarm. A time delay will prevent the gas from being released until sufficient time has elapsed for personnel to evacuate the space.
A time delay is included to allow time for the alarm to run while personnel has free time to vacate. An electrical time delay is a standard time delay relay or circuit. The pneumatic time delay is simply a reservoir in the line from the pilot cylinder to the discharge head. The calibrated test tube plugs the C0 into the reservoir. The resistance of the tube and the volume of the chamber will prevent the pressure in the pilot line from building up to a point where it can activate the cylinder head for a certain period of time.
Triggers an external alarm system. The alarm makes it possible to call the fireman.
Operate the diverter valve in large systems. In large systems, carbon monoxide is often used. Storage can serve multiple spaces. In such a system, the diverter valve directs CO 2 to space where the fire is located.
releases C0 from the storage tank/cylinder into the distribution system. On an electric system, an electric latching valve is used to initiate the discharge. The pneumatic system uses a pilot valve operated by C0, which is actuated by a small cylinder of CO2 (called a "pilot cylinder"). The valve on the high pressure cylinder is called the "discharge head". Most manufacturers integrate the vent valve with the cylinder as a pilot device to activate the manual vent valve. Either electric or pneumatic are interchangeable, so a single cylinder valve design can be used in any high-pressure system.
Liquid C0 enters the piping system and nozzle system from the tank vent valve or cylinder vent head, which distributes the gas through the entire protected space. While in the system piping, the CO is liquid. When discharged from the nozzle into the protected space, it vaporizes.