Jockey pump sizing pdf

The jockey pump, an important part of a fire pump system. Today, you can expect to find a fire pump in almost any public building or factory. 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. But even medium to small pump stations need access by maintenance crews and equipment, and ease of access should always be considered. There is a limitation to the performance of a pump powered by a singlephase motor. With revenues of 25 billion in fy2016, our 144,000 employees serve customers in over 100 countries, helping. 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. Your system remains hydrostatic until a a sprinkler operates or b you have a leak upstream of the pump discharge. The national fire protection agency nfpa guidelines do not put much attention on jockey pump sizing. Sizing a jockey pump for these is more of a swag scientific. Anything over 20 gpm is getting excessive and approaches the flow capacity of some heads.

It does not matter who the makes it, the method of sizing the pump is the same. In a fully sprinklered structure with standpipes, nfpa 14 2010. 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. Guidance is provided for sizing and selection of pumps and pump. If you work with the connections or controls for fire pumps, you need to understand article 695. Fire pump sizing the estimated performance of the fire pump between 100% and 150% of rated flow can be calculated using the following formula.

All jockey pump valves to be located as required per nfpa 20. Design of sewage pumping stations by john zoeller, pe, ceopresident. Fire pumps are normally purchased as a complete package that includes the following. Also, what method should i used in order to size the flow capacity of the jockey pump. The following is a pump sizing problem to illustrate the calculations in this article. Find a suitable pump based on head, flow and design. When sizing a jockey pump set it is important to ensure that the performance of the. Drop pipe selection size of drop pipe is selected based on the capacity to be pumped. Installation and operation instructions peerless pump company 2005 dr. How to calculate jockey pump capacity in fire fighting system. Except for no test header requirement, a jockey pump has the same basic components as the main fire pump.

Also, remember that the election of the jockey depends of the longitude, size, type and leaks of the underground piping. Fire fighting how to calculate fire pump and jockey pump capacity in fire. Jan 02, 2014 the national fire protection agency nfpa guidelines do not put much attention on jockey pump sizing. Pressure of jockey pump shall be greater than the pressure of main fire pump by minimum of 10 psi to avoid. 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. Design of sewage pumping stations zoeller engineered products. The pump is a centrifugal pump that will need to pump 800 galmin when in normal operation. Aug 28, 2017 schneider electric is the global specialist in energy management and automation.

Introduction to pumping stations for water supply systems course no. The standard method of sizing the foampak capacity is by multiplying the area of the hazard by the required density, multiply. The esv fabricated vertical multistage pump is an energy saving, nonpriming pump coupled to a standard premiumefficient motor. Installation and operation instructions peerless pump. But vendor who supply fire fighting package stated that they will supply jockey pump with the capacity of 25 gpm. Jockey pumps are a low cost yet essential component of a fire pump sprinkler system.

The jockey being a tap off of the fp service is common, i cannot recall a jockey being fed from another source. A jockey pump should be sized to make up the allowable leakage rate within 10 minutes or 3. Achieving this mass flowrate requires a pump that can generate a. 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. 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 pump shall be hydrostatically tested at a pressure of not less than one and onehalf times the. To calculate pump gpm, two sizing methods are available, the standpipe method and the sprinkler area calculation. The pump shall be hydrostatically tested and run tested prior to shipment. 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. One is the main fire pump which delivers large volumes of water to the fire standpipe system in case of fire. The armstrong 4700 multistage pumps are designed for reliability and low maintenance cost. These controllers are intended for use with fire pump systems. 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.

The horsepower required is dictated by the flow and pressure required. The jockey pump is not intended to handle fire sprinkler discharge. 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. In the event of a fire, the system pressure will drop further to start the main pump. The other is a low flow, high head jockey pump which keeps the system pressurized during normal non. 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. 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. Turbo machines affinity laws can be used to calculate volume capacity, head or power consumption in centrifugal pumps with changing speed or wheel diameters. 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. Each pump is tested hydrostatically for not less than 5 minutes. If you have a leakage rate greater than 15 gpm, then you have bigger issues than the size of the jockey pump. The jockey pump should only maintain system pressure and be able to handle small leaks.

Introduction to pumping stations for water supply systems. Jockey pumps are small, motor driven pumps used in conjunction with main fire pumps to. A qualified electrician must be onsite in the pump room during the startup and test to make an changes to the wiring. This suggest the jockey pump be sized less than the smallest single sprinkler head but also cautions to make sure it. Fire fighting how to calculate fire pump and jockey pump. Typically the jockey pump is sized to 1% of the fire pumps rated flow. Calculating the size of jockey pump for an underground distribution. You are told to purchase a pump for your manufacturing facility that will carry water to the top of a tower at your facility. Aug 11, 2012 how to calculate jockey pump capacity in fire fighting system. Overall pump and fan efficiency is the ratio power actually gained by the fluid to the shaft power supplied.

Since the jockey pump is not required to be listed, the control valves and check valve are not required to be listed. The jockey pump is not as mundane as many engineers, contractors, and installers would. Does this sizing seem ok or does anyone have any issues with this set up. You must not connect conductors supplying power for pressure maintenance jockey or make up pump s to the fire pump controller, per sec. Note 7 will indicate wire size for 125% of the flc of the jockey pump.

Mar 17, 2015 how to and not to size a jockey pump published on march 17, 2015 march 17, 2015 37 likes comments. 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. Patterson jockey pump controllers are built to nema industrial standards and are ul508 listed and etl certified. The fire pump unit itself consists of a pump, a drive, a driver coupling connecting the two, and a base plate. 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. Feb 05, 2016 im in the middle of designing a service to a new fire pump building. The other is a low flow, high head jockey pump which keeps the system pressurized during normal nonfire conditions. Select impeller in exactly the same manner as for lineshaft type pump.

This enables the pump to start dry and reprime itself without manually adding water. Pump sizing pump sizing involves matching the flow and pressure rating of a pump with the flowrate and pressure required for the process. Before we answer the quetion, itd better to understand what jockey pump is and what the function in fire fighting sytem. Then the jockey pump flow rate is 1500 gpm 1% 15 gpm. There shall be provided a pressureactuated switch having independent high and low calibrated adjustments in the controller circuit. Armstrong horizontal endsuction hes fire pumps deploy a heavyduty bearing frame to provide long and reliable service in an overhung impeller design. 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.

Hence a jockey pump is an important part of the fire pumps control system. The control valves to and from the jockey pump shall be supervised butterfly. 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. Guidance is provided for sizing and selection of pumps and pump drives, piping, control valving, flow metering, pump station. In addition, these pumps can be used when lots of air has to be moved such as with well point dewatering systems. Following is the most relevant text related to this, from nfpa 20. In other regions, singlephase motors are more widely used. Line and load side power to the fire and jockey pump controllers and drivers must be completed per nfpa20 and. 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. 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. 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. The jockey pump shall be installed in accordance with nfpa 20. The jockey pump jp or pressure maintenance pumps pmp as.

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. The pump size must conform to the flow rate, pressure, speed, suction conditons etc. Please contact me if a date becomes available sooner than i have selected. Design of sewage pumping stations by john zoeller, pe, ceopresident this article provides guidelines for designing municipal pumping systems. Fire fighting how to calculate fire pump electrical driven pump diesel driven pump and jockey pump capacity in fire fighting system. Fire hydrated 1500 spt which pamp size jacky modal purchase. With 100 years of experience, aurora provides consistent, quality manufacturing and performance. You cannot use the fire pump controller as a junction box for wiring to supply other electrical equipment. It doesnt cover the jockey pumps or the internal wiring of the system photo. The mass flowrate of the system is established on the process flow diagram by the mass balance. A rule of thumb for sizing jockey pump supplying underground piping is to use 1% of the fire pump rated capacity. Schneider electric is the global specialist in energy management and automation. Pump sizing and selection made easy chemical engineering.

Mar 28, 2002 in some parts of the country, all jockey pumps are powered by threephase motors. Sizing of a jockey pump for an aurora fire pump system. Municipal these systems are designed to serve a given natural drainage area and are part of the public sanitary sewer system. Get product recommendation based on your liquid requirements. 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.

A jockey pump is an important component of fire fighting system. In all cases, the pumping stations should be protected from physical damage. If the underground piping leaks excessively, jockey pump sizing must be increased to the maximum permitted. 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. Jockey pumps are variable speed pumps used in conjunction with the main. 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. Remember that a jockey pump is a pressure maintenance pump.

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. Browse by product family, pump design or application area. Pumps and drivers on separately coupledtype pumps shall be aligned in accordance with the coupling and pump manufacturers speci. Find a grundfos pump to replace old grundfos and competitor products. 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. 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. Jockey pumps are typically small multistage centrifugal pumps, and do not have to be listed or certified for fire system application. It will switch the pump on and off periodically to maintain trunk main pressure at high level. 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. 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. 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.