Jan 02, 2014 the national fire protection agency nfpa guidelines do not put much attention on jockey pump sizing. If the underground piping leaks excessively, jockey pump sizing must be increased to the maximum permitted. Fire fighting how to calculate fire pump and jockey pump. Hence a jockey pump is an important part of the fire pumps control system. The pump shall be hydrostatically tested and run tested prior to shipment. A jockey pump should be sized to make up the allowable leakage rate within 10 minutes or 3. These controllers are intended for use with fire pump systems. But vendor who supply fire fighting package stated that they will supply jockey pump with the capacity of 25 gpm. Also, what method should i used in order to size the flow capacity of the jockey pump. Positive displacement pumps are those in which energy is imparted to the liquid in a fixed displacement volume, such as a casing or a cylinder, by the rotary motion of gears.
The esv fabricated vertical multistage pump is an energy saving, nonpriming pump coupled to a standard premiumefficient motor. Remember that a jockey pump is a pressure maintenance pump. Note 7 will indicate wire size for 125% of the flc of the jockey pump. Since fire pumps are considered life safety equipment, they must be reliable. The other is a low flow, high head jockey pump which keeps the system pressurized during normal non. Fire fighting how to calculate fire pump and jockey pump capacity in fire. Guidance is provided for sizing and selection of pumps and pump. The following is a pump sizing problem to illustrate the calculations in this article. Installation and operation instructions peerless pump. It is designed to keep the pressure in the system elevated to a specific level when the system is not in use, so that the fire pump doesnt have to run all the time and the system doesnt go off.
The pump manufacturer, armstrong pumps, recommends, as a rule of thumb, to size the jockey for about 1 % of the rated flow of the main fire. It doesnt cover the jockey pumps or the internal wiring of the system photo. This may help provide a constant pressure control with a slight to moderate over sizing a jockey pump for future leaks or large system expansions. The test pressure is to be upto 2 times the maximum working pressure of the pump, but in no case less than 250 psi 1724 kpa to ensure no rupture or leakage through the castings at the test pressure.
A qualified electrician must be onsite in the pump room during the startup and test to make an changes to the wiring. Pdf fire pump layout and sizing subash kumar academia. Select impeller in exactly the same manner as for lineshaft type pump. From time to time, though, small water leaks, unwanted pressure drops, or even. Drop pipe selection size of drop pipe is selected based on the capacity to be pumped. Today, you can expect to find a fire pump in almost any public building or factory. Pressure of jockey pump shall be greater than the pressure of main fire pump by minimum of 10 psi to avoid. There is a limitation to the performance of a pump powered by a singlephase motor. In the event of a fire, the system pressure will drop further to start the main pump.
Patterson jockey pump controllers are built to nema industrial standards and are ul508 listed and etl certified. Find a grundfos pump to replace old grundfos and competitor products. There shall be provided a pressureactuated switch having independent high and low calibrated adjustments in the controller circuit. Mar 28, 2002 in some parts of the country, all jockey pumps are powered by threephase motors. Centrifugal pumps closecoupled 6 features booster service jockey pumps liquid transfer spray systems general service water circulation capacities to 640 gpm heads to 175 feet. The jockey pump is not intended to handle fire sprinkler discharge. The jockey pump should only maintain system pressure and be able to handle small leaks. In a basic centrifugal pump, typically a single casing, water enters through the pump inlet into the center eye of the impeller which is spinning on a shaft. You must not connect conductors supplying power for pressure maintenance jockey or make up pump s to the fire pump controller, per sec. A jockey pump, or a pressuremaintenance pump, is a small apparatus that works together with a fire pump as part of a fireprotection sprinkler system. The national fire protection agency nfpa guidelines do not put much attention on jockey pump sizing. One is the main fire pump which delivers large volumes of water to the fire standpipe system in case of fire.
The pump is a centrifugal pump that will need to pump 800 galmin when in normal operation. When starting a fire pump design, the most important item to consider is the water supply. In addition, these pumps can be used when lots of air has to be moved such as with well point dewatering systems. Pump sizing and selection made easy chemical engineering. Your system remains hydrostatic until a a sprinkler operates or b you have a leak upstream of the pump discharge. If a transformer supplies an electric fire pump motor, size it at least 125% of the sum of the fire pump and pressure maintenance pump s motor loads, and 100% of the ampere rating of the fire pump s accessory equipment 695. This suggest the jockey pump be sized less than the smallest single sprinkler head but also cautions to make sure it. Aug 28, 2017 schneider electric is the global specialist in energy management and automation. Guidance is provided for sizing and selection of pumps and pump drives, piping, control valving, flow metering, pump station. Aug 11, 2012 how to calculate jockey pump capacity in fire fighting system. The pump size must conform to the flow rate, pressure, speed, suction conditons etc. Most stationary fire pump assemblies are installed with devices that automatically sense a pressure loss in a fire protection system, and start running to supply water or boost pressure in that system. The mass flowrate of the system is established on the process flow diagram by the mass balance. Also, remember that the election of the jockey depends of the longitude, size, type and leaks of the underground piping.
When sizing a jockey pump set it is important to ensure that the performance of the. Pumps and drivers on separately coupledtype pumps shall be aligned in accordance with the coupling and pump manufacturers speci. You cannot use the fire pump controller as a junction box for wiring to supply other electrical equipment. The jockey pump is not as mundane as many engineers, contractors, and installers would have you believe. Fire fighting how to calculate fire pump electrical driven pump diesel driven pump and jockey pump capacity in fire fighting system. If these conductors also supply related equipment, such as another fire pump motor, pressure maintenance pumps, and associated fire pump accessory equipment, they must have a minimum ampacity of at least 125% of the sum of the fire pump motors and pressure maintenance motors fullload currents and 100% of the associated fire pump accessory. The fire pump unit itself consists of a pump, a drive, a driver coupling connecting the two, and a base plate. Turbo machines affinity laws can be used to calculate volume capacity, head or power consumption in centrifugal pumps with changing speed or wheel diameters. Design of sewage pumping stations by john zoeller, pe, ceopresident this article provides guidelines for designing municipal pumping systems. Standard for the installation of standpipes and hose systems says that the first standpipe requires 500 gpm and each additional standpipe requires 250 gpm, up to a.
To calculate pump gpm, two sizing methods are available, the standpipe method and the sprinkler area calculation. Sizing of a jockey pump for an aurora fire pump system. It will switch the pump on and off periodically to maintain trunk main pressure at high level. If the pump is powered by a diesel driver the below items must be completed before sth arrives. If you work with the connections or controls for fire pumps, you need to understand article 695. Aurora is a reknowned supplier of pumps and pump systems used in a variety of commercial, fire suppression, hvac, industrial, marine, oil and gas and municipalwater treatment markets and applications throughout the world. The jockey pump shall be installed in accordance with nfpa 20. But even medium to small pump stations need access by maintenance crews and equipment, and ease of access should always be considered. Get product recommendation based on your liquid requirements. Installation and operation instructions peerless pump company 2005 dr. Jun 05, 2017 if youre referring to sizing the flow rate of a jockey pump as it relates to a normal leakage rate, generally we size the jockey pump flow rate to be 1% of the fire pump s rated gpm 1 gpm per 100 gpm of fire pump. Overall pump and fan efficiency is the ratio power actually gained by the fluid to the shaft power supplied. Mar 22, 2020 a jockey pump, or a pressuremaintenance pump, is a small apparatus that works together with a fire pump as part of a fireprotection sprinkler system.
Please contact me if a date becomes available sooner than i have selected. Following is the most relevant text related to this, from nfpa 20. As a manufacturer and supplier of centrifugal pumps and positive displacement pumps we offer the optimum for both applications. I would defer to traviss wisdom and ensure that the pump has a flow rate of 1% of the pump rating and has the appropriate pressure rating for your system. It does not matter who the makes it, the method of sizing the pump. A jockey pump is a small pump connected to a fire sprinkler system in order to maintain a certain pressure in the sprinkler system, and sized to ensure that if a. Schneider electric is the global specialist in energy management and automation. Line and load side power to the fire and jockey pump controllers and drivers must be completed per nfpa20 and. All jockey pump valves to be located as required per nfpa 20. The control valves to and from the jockey pump shall be supervised butterfly. Jockey pumps are small, motor driven pumps used in conjunction with main fire pumps to. In other regions, singlephase motors are more widely used. Jockey pumps are variable speed pumps used in conjunction with the main.
Sizing a jockey pump for these is more of a swag scientific. Centrifugal pump design is the most typical for fire pumps and auxiliary pumps in modern fire apparatus and its proven design has been used in fire apparatus for well over a century. Anything over 20 gpm is getting excessive and approaches the flow capacity of some heads. Jockey pumps are typically small multistage centrifugal pumps, and do not have to be listed or certified for fire system application. You are told to purchase a pump for your manufacturing facility that will carry water to the top of a tower at your facility. Does this sizing seem ok or does anyone have any issues with this set up. It does not matter who the makes it, the method of sizing the pump is the same. When designing or installing electrical power supplies for fire pumps and their accessories, you must apply special rules as listed in nfpa 70, the national electrical code nec, and the standard for centrifugal fire pumps cfp nfpa 20. Introduction to pumping stations for water supply systems course no.
Calculating the size of jockey pump for an underground distribution. Fire hydrated 1500 spt which pamp size jacky modal purchase. The armstrong 4700 multistage pumps are designed for reliability and low maintenance cost. Armstrong horizontal endsuction hes fire pumps deploy a heavyduty bearing frame to provide long and reliable service in an overhung impeller design. It is designed to keep the pressure in the system elevated to a specific level when the system is not in use, so that the fire pump doesnt have to run all the time and the system doesnt go off randomly. Achieving this mass flowrate requires a pump that can generate a. The jockey being a tap off of the fp service is common, i cannot recall a jockey being fed from another source.
How to calculate jockey pump capacity in fire fighting system. Pump sizing pump sizing involves matching the flow and pressure rating of a pump with the flowrate and pressure required for the process. Except for no test header requirement, a jockey pump has the same basic components as the main fire pump. Typically the jockey pump is sized to 1% of the fire pumps rated flow. Then the jockey pump flow rate is 1500 gpm 1% 15 gpm. Its built to withstand a variety of, mechanically aggressive and high temperature liquids, and is designed to extend uptime and help reduce lifecycle costs in a wide range of demanding applications. The horsepower required is dictated by the flow and pressure required. The jockey pump, an important part of a fire pump system. Introduction to pumping stations for water supply systems. The standard method of sizing the foampak capacity is by multiplying the area of the hazard by the required density, multiply. Design of sewage pumping stations by john zoeller, pe, ceopresident. With 100 years of experience, aurora provides consistent, quality manufacturing and performance. In our design basis, we stated that the capacity of jockey pump is 50 gpm the capacity of main fire pump is 500 gpm for electric motor fire fighting and diesel engine fire fighting, respectively. Mar 17, 2015 how to and not to size a jockey pump published on march 17, 2015 march 17, 2015 37 likes comments.
Municipal these systems are designed to serve a given natural drainage area and are part of the public sanitary sewer system. The pump shall be hydrostatically tested at a pressure of not less than one and onehalf times the. In all cases, the pumping stations should be protected from physical damage. Design of sewage pumping stations zoeller engineered products. If you have a leakage rate greater than 15 gpm, then you have bigger issues than the size of the jockey pump. Before we answer the quetion, itd better to understand what jockey pump is and what the function in fire fighting sytem. Since the jockey pump is not required to be listed, the control valves and check valve are not required to be listed. Fire pump overview fire pump unit defined a fire pump is a device that provides the required water flow and pressure for a fire protection system. Generally spoken, the pump is a device that conveys a certain volume of a specific liquid from point a to point b within a unit of. In a fully sprinklered structure with standpipes, nfpa 14 2010. Fire pumps are normally purchased as a complete package that includes the following. Submersible pumps frequently require smaller drop pipe than do line shaft pumps since the full area of the pipe is used to deliver water to the surface. A jockey pump is an important component of fire fighting system. The jockey pump jp or pressure maintenance pumps pmp as.
The other is a low flow, high head jockey pump which keeps the system pressurized during normal nonfire conditions. Jockey pumps are a low cost yet essential component of a fire pump sprinkler system. A rule of thumb for sizing jockey pump supplying underground piping is to use 1% of the fire pump rated capacity. With revenues of 25 billion in fy2016, our 144,000 employees serve customers in over 100 countries, helping. Other than the method of taking the 1% pressure capacity of fire pump to calculate the jockey pump pressure capacity, is there any calculation method on how to size its pressure capacity. If youre referring to sizing the flow rate of a jockey pump as it relates to a normal leakage rate, generally we size the jockey pump flow rate to be 1% of the fire pumps rated gpm 1 gpm per 100 gpm of fire pump. This enables the pump to start dry and reprime itself without manually adding water. A jockey pump is sized for a flow less than the flow to one sprinkler in order to ensure a system pressure drop. The fire protection solutions for mainland applications include entire pump systems, complete with jockey pumps and main pumps that are either diesel or electrical driven, while a dedicated range of grundfos offshore pumps is available for vessels and oil rigs. The jockey pump is not as mundane as many engineers, contractors, and installers would. Each pump is tested hydrostatically for not less than 5 minutes. If you are utilizing the city water supply as the primary source for the pump, you need to make sure that an accurate city water test is used. The way to size a jockey pump for any fire pump system is the same no matter who the manufacturer is aurora or peerless or patterson, etc.
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