Our Estimating Department is committed to providing honest, accurate, inclusive and competitive bids. We are committed to providing the best possible value to our customers on all of their fire protection needs. J&D Sprinkler would be happy to provide a quote on the following fire sprinkler systems: wet, dry, pre-action, ESFR, and Quell fire sprinkler systems.
Dry Pipe Sprinkler System
A dry pipe sprinkler system is a sprinkler system 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. This valve is located in a heated space. The dry pipe valve prevents water from entering the pipe until a fire causes one or more sprinklers to operate. Once a sprinkler is activated the dry pipe valve is released, air escapes and water enters the pipes flowing through open sprinklers onto the fire.
Pre-action Fire Sprinkler System
A pre-action fire sprinkler system employs the basic concept of a dry pipe system in that water is not normally contained within the pipes. The difference, however, is that water is held from piping by an electrically operated valve, known as a pre-action valve. Valve operation is controlled by independent flame, heat, or smoke detection.
Two separate events must happen to initiate sprinkler discharge: First, the detection system must identify a developing fire and then open the pre-action valve. This allows water to flow into system piping, which effectively creates a wet pipe sprinkler system. Second, individual sprinkler heads must release to permit water flow onto the fire.
In some instances, the pre-action sprinkler system may be set up with a double interlock in which pressurized air or nitrogen is added to system piping. The purpose of this feature is two-fold: first to monitor piping for leaks and second to hold water from system piping in the event of inadvertent detector operation. The most common application for this system type is in Computer Server Rooms.
Early Suppression Fast Response (ESFR)
Early Suppression Fast Response (ESFR) systems are quick responding, high volume sprinkler systems that provide exceptional protection for high piled storage occupancies. Instead of merely controlling a fire until the original fuel source is depleted, ESFR systems are designed to suppress the fire by discharging a large volume of water directly to the fire to reduce the heat release rate. These systems, installed at the ceiling, use large volumes of water delivering large water droplets at a high velocity to knock down the fire plume and provide enhanced protection for High Piled Storage Occupancies.
Early Suppression Fast Response systems differ from conventional systems in three ways:
Speed - ESFR sprinkler heads sense a fire and begin spraying water quicker than standard response sprinkler heads
Volume - Conventional sprinkler heads output rate - 25 to 30 gallons per minute. High output conventional sprinkler heads output rate - 60 gallons per minute. ESFR sprinkler heads output rate - 100 gallons per minute
Droplet size - ESFR sprinkler heads release larger droplets of water with greater momentum than conventional heads. This combination of size and momentum allows the sprinkler droplet to penetrate a fire plume and reach the seat of a fire
ESFR fire suppression systems can be used in warehouses with ceilings as high as 45 feet and storage heights of 40 feet. The installation and material costs of these systems are more economical than the costs of creating and installing an in-rack fire suppression system, often 30% to 50% less. Before making a decision about using an ESFR fire suppression system, the Owner must consider the types of products being stored, the storage arrangement, the height and construction type of building, and the cost differentials of installing and maintaining the system over other types of systems.
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