Fire pump calculations

NFPA 20 Diesel+Electric+Jockey+Controller Packaged Fire pump Introduction XBC series Diesel engine fire-fighting pump is a new-style fire fighting equipment, which is developed upon the fitted fire fighting pumps (single stage single suction type, singlestage dualsuction type and sectional multistage type), can be divided into several series. The equipment has a wide range of pressure and temperature and can be used for almost every occasion necessary for fire fighting purpose.The diesel engine fitted with the equipment is an excellent product domestic or imported, features good starting performance, strong overload capacity, compact structure, easy maintenance and use and high degree of automation. XBD Series Electricity Fuel Centrifugal Fire Fighting Water Pump is the new middle and low pressure fire fighting product, which researched by our company according to the latest standard(GB 6425-1998) of fire fighting pump in our country, its motor and fire pump is connected directly, which simplified the middle transmitting structure, and strengthen operation's stability. Its building area is less 30% than common horizontal fire pump, the shaft seal adopts hard alloy mechanical seal without leakage, its inlet and outlet can be installed at any position and any direction like valve, its noise is low, maintenance is convenient, shake is little and so on. XBD series include four structural types to meet the different requirements of users, including vertical single-stage fire pump, vertical multistage fire pump, horizontal single-stage fire pump and horizontal multistage fire pump. Name Electric or diesel engine driven centrifugal fire fighting water pump Pumped medium Water or other liquid Fire pump flow 1.5~1550m3/h Fire pump head 16~380m Inlet & Outlet diameter DN25~600mm Fire Pump material Cast iron/Stainless steel Speed 980~3500rpm Diesel / motor power 0.75~580kW Diesel cylinder numbers 1/2/4/6/8 Straing method 12/24V battery starter for diesel engine Motor Electric 110~525V Medium temperature -15~+120ºC 1.Electric pump: kinds of end suction pump, split case pump, multistage pump.made of cast iron, stainless steel. Impeller can be bronze. 5.5-710 kw 0.3-1.2 mpa 10-420 l/s (150-6600GPM 2.Diesel pump: Flow is the same with electric pump. It connects the pump set with High elastic coupling or universal joint.It also includes water tank, oil tank, fans, control screen etc. 7.0-810 kw 0.3-1.2 mpa 10-420 l/s (150-6600GPM) 3.Jockey pump: horizontal or vertical, small flow, head is higher than electric or diesel pump 4.Control panel: control the pumps automatically with overload, overcurrent protection 5.Accessories: check valve, gate valve, pressure tank (0.6mpa, 1.0mpa, 1.6mpa) Pressure gauge, pressure sensors, import and export common pipe, soft joints, flanges and common base.

500GPM 750GPM 1000GPM 8BAR Fire Fighting Pump Set Introdution Fire pump system is made of Electric Pump + Diesel Engine Pump+Jockey Pump+Accessories Operation: 1 Duty(electric pump ) + 1 stand by(diesel engine ) + 1 Jockey Capacity: 100GPM, 150GPM, 200GPM, 300GPM, 400GPM, 500GPM, 750GPM, 1000GPM, 1250GPM...GPM with Pressure 4Bar, 5bar, 6Bar, 10Bar, 15Bar... Bar. Application:Equipment for warehouses, docks, airports, petrochemical, power plants, liquefied gas, textiles, ships, oil tankers and other occasions of a fire service. Working Conditions :Altitude ≤ 1000m; Ambient temperature: +5 °C ~ +40 °C; Relative humidity: Features 1)Safe and reliable 2)Easy installation 3)Easy to operation 4)International standard 5)Use foreign advanced technology EDJ Fire Fighting Pump System's Components A brief introduction of EDJ Fire Pump System's components Diesel Engine Fire Pump Have the standard of National Fire Protection Association Standard NFPA20 "centrifugal fire pump installation" and other standards. The diesel engine fire pump is equipped with the characters of good and strong overload capacity, compact structure, easy to maintain and high degree of automation. Altitude ≤ 1000m; Ambient temperature: +5 °C ~ +40 °C; Relative humidity: ≤ 90% Electric Fire Pump Apply to fire protection system, pressurized water pipes, industrial and urban water supply and drainage, water pressure high-rise building, long-distancewater, heating, bathrooms, boilers and well-being of the water cycle, pressurized water and air-conditioning cooling systems and other equipment supporting occasions. Flow: 1~300L/s; Head: 0.15~1.6MPa; Power: 0.75~160/6P kW; Speed: 960~2900r/min; Working Pressure: ≤1.6MPa; Medium Temperature: ≤90°c; Material: HT200 (Bronze ally impeller) Jockey Pump The combination of advanced international

Etc.Sizing a Fire PumpA fire pump must be designed properly to handle the most demanding fire sprinkler system. Incorrectly sized fire pumps can result in several problems like:Improper system function.Undeveloped spray patterns from sprinklers.Insufficient pressure to hose valves.Too much pressure, causing components to burst and break open while operating.Hence, the first step of fire pump sizing is to identify the most demanding system. The standpipe is the most demanding system in most commercial buildings. The standpipe system design and the fire pump flow rate requirements are given in NFPA 14.Next, the required pressure must be calculated. Pressure requirement can be calculated as (Demand at the top + static losses+ pipe friction losses – source water pressure). Other requirements are the size of the room where the fire pump will be installed.If the sprinkler load is the most demanding then the fire pump must be designed based on the hydraulic demand of the sprinkler system.Once the above parameters are known, a fire pump can be selected. NFPA Fire Protection Handbook provides enough guidelines for selecting the required fire pump.Characteristics of a Fire PumpThe main characteristic feature that a fire pump should have are listed below:Pump internals must be made from non-corrosive materials.The pump selection must be based on the required NPSH value, flow, and head demand to avoid cavitation.All fire pumps must have adequate power reserves.Join us on Telegram

Fire pumps are one of the essential components of most water-based fire protection systems, especially for high-rise taller buildings and structures. Their main job is to increase the water pressure when the water source does not have adequate pressure to supply the system. In this article, we will discuss the working and types of fire water pumps.Working Principle of a Fire Water PumpA fire water pump consists of a driver and a controller. Each pump works in any one of the following two working principles:Centrifugal Pumps andPositive Displacement PumpsCentrifugal-type fire water pumps generate centrifugal forces by rotating their impeller and throwing the water from the center of the impeller to the outer parts of the impeller. On the other hand, positive displacement type fire water pumps take a selected amount of liquid as input and use mechanical action to displace that through the outlet. In general, they use pistons, gears, vanes, lubes, etc to increase the liquid pressure while discharging.Centrifugal fire water pumps are used for high flow rates to provide a constant water flow mainly for buildings, utility stations, etc. Positive displacement-type fire water pumps are best suited for non-water services, specifically for foam concentrate or water mist systems.A fire pump in a fire sprinkler system normally receives water from either an underground water supply or a water tank, lake, or reservoir. These pumps are is powered by electricity or diesel fuel. The high pressure supplied by the fire pumps helps in the proper distribution of water through the sprinkler system and hose standpipes.Types of Firewater PumpsDepending on the working philosophy mentioned above there are two main types of fire water pumps; Centrifugal and Positive displacement. All these fire pumps can again be sub-divided into various types as listed below:Centrifugal Fire Water PumpHorizontal and Vertical Split-Case PumpVertical Turbine PumpIn-Line PumpEnd Suction PumpMultistage Multiport PumpPositive Displacement Fire Water PumpsCentrifugal Fire Water PumpsCentrifugal fire pumps are the most widely used fire pumps. They can handle a large volume of water. The common sub-types of centrifugal fire pumps are discussed below:Horizontal and Vertical Split-Case PumpsHorizontal Split case pumps are very reliable fire pumps with long lifespans and size availability. They are available in a wide range of rated flow and pressure capacities and are thus suitable for a range of fire-water applications. In a horizontal split-case pump, the flow is divided and enters the impeller from opposite sides of the pump housing. The pump has a split casing (and hence the name) that is easy to open during pump maintenance. The pump is connected to the driver by a horizontal shaft.A Vertical split casing pump is almost similar to that of a Horizontal split casing pump. But the orientation of the pump and motor are vertical. The vertical motor placement consumes less floor space and themotor is protected against potential flooding conditions. Both horizontal and vertical split case pumps require a water source providing a positive suction pressure.Fig. 1: Types of Fire PumpsVertical Turbine PumpsThe fire protection pump standard NFPA 20 allows