Fire commander psi check driver#
This peak represents the highest amount of power the pump requires and the driver must be sized to meet that requirement. Look at the horsepower curve on the factory-certified test report and ensure that the power curve peaks and then begins to fall. The best way to ensure that the driver is sized correctly, and conforms to UL and FM requirements, is to review the certified factory test curve.
Fire commander psi check full#
IMAGE 1: The pump curve shows a constant rise to shut off from the rated point to churnįinally, the driver of the fire pump, whether it is an electric motor, diesel engine or steam turbine, must be sized to meet the full horsepower demands of the fire pump, even if it means flowing beyond the 150% required duty point. It should be noted that FM also requires a constant rise to shut off, which means the pump pressure must always be increasing as pump flow is reduced. Third, the dead head, or churn pressure (pressure at no flow), must not be more than 140% of the rated duty point pressure. Second, the fire pump must be able to meet 150% of the rated duty gpm while maintaining at least 65% of the rated duty point pressure. The first requirement is to have a rated duty point, which consists of the rated flow (gallons per minute ) and the rated pressure (pounds per square inch ). Each fire pump must be tested and meet the following requirements before it can be shipped, with a certified factory test curve being provided. NFPA 20, UL and FM provide guidance on the basic requirements fire pumps must meet to be considered as such. If a fire pump has the UL and FM stamp of approval, the manufacturer has gone through the most stringent requirements to be able to provide their pumps for fire protection, giving peace of mind that the pump will operate when it is needed. NFPA 20 does not provide listings or approvals but acts as the guide for best practice. With regard to listings, groups such as Underwriters Laboratories (UL) and Factory Mutual (FM) provide UL Listings and FM Approvals on products that meet their testing requirements along with their own individual publication standards, UL448 and FM1311. The AHJ could be the local fire chief or it could be the insurer-it depends on locale.
NFPA 20 provides guidance for fire pumps and their installations but does not provide listings and defers to the authority having jurisdiction (AHJ) as the entity with the final say on installations. When it comes to best practices for fire pump design and installation, the National Fire Protection Association (NFPA) 20 Standard for the Installation of Stationary Pumps for Fire Protection provides the guidebook. It is important to remember to have a steady supply of water so that the fire pump may operate correctly. In this instance, installing a fire pump is done to provide a boost to get the necessary pressure to the top. An example would be a high-rise building where the pressure from a city supply line is not great enough to overcome gravity to reach the top of the building. Instead, they create pressure from an existing water supply, such as a city supply line or a storage tank, by converting mechanical energy into hydraulic energy.įire pumps are necessary when the water supply available does not generate the necessary hydraulic pressure required to meet demand of a fire protection system such as automatic sprinklers and standpipes, or even foam systems. It can be driven by diesel engines, electric motors or even steam and is used to provide increases in water pressure to meet the design requirements of a fire protection system. Be sure that during emergencies, everyone will know what to do.A fire pump is any type of purpose-driven pump used within a fire protection system. Send your firefighters on training courses and develop their skills. Take care of your people, before and during rescue actions. Putting your life on the line together can form strong bonds between you and your crew. The welfare of your crew and the success of the missions depend on your decisions. In action, consider such factors as backdraft, smoke, or materials with a different combustion temperature. Creatively combining them, discover multiple ways of dealing with any situation.
Fire commander psi check free#
Be free to utilize different vehicles, class specializations and tools. How would it feel to head a group of firefighters and manage a fire station? Facing the fire and making decisions that can affect the lives of many people? Now you have the chance to experience it in Fire Commander!įrom extinguishing fires, to saving people and valuable equipment, experience a variety of environments and dangers, including the risk of a toxic spill.
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