What is a dry valve for sprinkler system?
A dry pipe sprinkler system is one in which pipes are filled with pressurized air or nitrogen, rather than water. This air holds a remote valve, known as a dry pipe valve, in a closed position.
What are the components of a dry pipe sprinkler system?
Here’s how they work: Instead of storing water, dry sprinkler pipes are filled with pressurized air or nitrogen that holds a main dry pipe valve in a closed position. The valve, set in a heated space, keeps the water supply from entering the pipes until a fire causes one or more sprinkler heads to activate.
How does a dry valve Accelerator work?
The most common are accelerators, which quickly sense rapid air pressure drops and push pressurized air into the dry valve to upset its differential faster. Exhausters discharge large amounts of pressurized air directly into the atmosphere instead of waiting for it to escape through the sprinkler.
How do you tell the difference between a wet and dry sprinkler system?
In a wet system, the pipes are filled with pressurized water. When a fire occurs, the system immediately discharges water to extinguish the fire. Conversely, dry systems are filled with pressurized nitrogen or air that keeps water at a riser.
How do I know if my OS&Y valve is open?
An OS&Y valve is open when the threaded stem extends from the valve. The valve is closed when the stem is not visible above the control wheel.
How do you reset a reliable deluge valve?
Resetting the clapper of the Model DDX Deluge Valve is accomplished using the convenient external reset knob on the rear of the valve. The external reset feature of the Model DDX Deluge Valve provides a means for simple, economi- cal system testing, which is one essential facet of a good maintenance program.
How do you reset a reliable B1 accelerator?
The accelerator is reset by removing the drain plugs to vent the accelerator. The Reliable Model B1 Accelerator is quickly attached to the Reliable Model D 4² and 6² Dry Pipe Valve by using the BD-2 Accelerator Trimmings. No alterations are required to the original sprinkler system for this installation.
What is dry pipe valve?
A dry pipe valve system is often used in industrial and commercial fire sprinkler systems. This type of piping system fills the pipes with pressurized air or nitrogen instead of water. The air contains a remote valve, also known as a dry pipe valve, in a closed position.
What is an anti flooding device?
After the dry valve has opened, flooding the system with water, the anti-flood device prevents water from entering the Model E-1 Accelerator where it could foul and plug the restricted orifices. …