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A vertical turbine type fire pump with a diesel engine attached on the right Antique Japanese fire pump Horse-drawn fire pump given to Brockhampton Estate in 1818 The portable fire pump normal pressure (PFPN) was standard equipment in many Żuk A-15 fire engines; ca. 1977. A fire pump usually refers to a pressure-increasing component of the ...
Typically the 200 psi inlet water pressure is reduced to 95 psi discharge pressure as a result of the narrowness of the venturi in the eductor device. Ejector See Smoke ejector. Ejector pump Pumps that use the venturi principle to pump water on a fire ground. Can be used for salvage by removing flood waters or supply water to a fire appliance ...
Variable Speed Fire Pump Controllers were invented and released with a UL Listing for fire pump service in 2003 by Master Control Systems, Inc. [1] [2] Paragraph 10.5.5 in the 2003 edition of NFPA-20 recognized Variable Speed as an accepted method for operating the fire pump. Then in the NFPA-20 2007 edition, section 10.10 was added to clarify ...
Discharge Head, is the net head obtained at the outlet of a pump. For a centrifugal pump, the discharge pressure depends on the suction or inlet pressure as well, along with the fluid’s density. Thus, for the same flow rate of the fluid, we may have different values of discharge pressure depending on the inlet pressure.
Fire engines are often seen carrying two or three 10-foot (3.0 m) lengths of suction hose, but the longer the lift, the lower the flow, for a fixed-diameter suction hose and a given pump. Multiple relays could be used if the need arises, with a suction pump drafting up to 10 metres (33 feet) and discharging at great distances.
In a nozzle or other constriction, the discharge coefficient (also known as coefficient of discharge or efflux coefficient) is the ratio of the actual discharge to the ideal discharge, [1] i.e., the ratio of the mass flow rate at the discharge end of the nozzle to that of an ideal nozzle which expands an identical working fluid from the same initial conditions to the same exit pressures.
Engine pressure: The pressure in a fire hose measured at the outlet of the pump. Enhanced 9-1-1 : Electronic system for automatic correlation of physical telephone lines with information about the location of the caller—a useful tool for dispatchers when the caller has an emergency but cannot speak.
In the United States, NFPA 1901 requires engines to have suction hose that matches the engine's pump rating. [12] For example, an engine with a 1,000-US-gallon (3,800 L) per minute pump is required to carry 5-inch (13 cm) or larger hose, [1]: 181 while a wildland fire engine will typically carry 2-to-2.5-inch (5.1 to 6.4 cm) hard suction hose.