The pumps described in this manual should not be installed in any manner except as specified herein, and must not be operated at speeds, capacities, pressures, or temperatures other than those specified on this the order. Residential self priming centrifugal pumps 60 hz gt irrigator applications. The operation and maintenance of these pumps are some of the most important duties for many water utility operators. Problem solving centrifugal pumps stuart w johnson. The concept of the fluid being available to the pump is discussed in detail in chapter 2 of this book. Centrifugal pump troubleshooting guide pumps by king pumps. The article has been written keeping in mind the level and interests of students and the beginners in operation. Well pump shortcycle water tank replacement and troubleshooting highlights waterworker ht32b duration. Pumps provide the means for moving water through the system at usable working pressures. Centrifugal pumps are one of the worlds most widely used type of pump, having an extensive. Centrifugal pump operation and solutions of problems. Irrigator model gt xylem applied water systems united.
Centrifugal pumps are capable of evacuating pumping a modest amount of air from the suction side of the pump to the discharge side of the pump. Pump or suction pipe not completely filled with liquid. Centrifugal pump troubleshooting chart leak pump scribd. Assembly for parts number, see drawings and parts list. However, there are enough pumps subjected to cavitation for.
The impeller is powered to rotate within the volute, creating centrifugal force which hurls. Centrifugal pump problems 5 overview of pump problems typically found on centrifugal pumps. One of the major problems facing industry is the limited number of people with sufficient skill and experience to diagnose and rectify the basic problems plaguing centrifugal pumps. Our brand and service is often imitated but never duplicated. Troubleshooting centrifugal pumps and their systems 2nd. Troubleshooting centrifugal pumps and their systems, second edition, begins by discussing pump characteristics that can be reconfigured to suit changing conditions. However, as with anything mechanical, problems do arise from timetotime. Basic concepts of operation, maintenance, and troubleshooting part i introduction the operating manual of any centrifugal pump often starts with a general statement, your centrifugal pump will give you completely trouble free and satisfactory service only. It is helpful to know what conditions can lead to pump damage to allow better understanding of pump operating procedures and how the procedures aid the operator in avoiding pump.
Machinery failure analysis and troubleshooting by heinz p. Practical centrifugal pumps is a comprehensive guide to pump construction, application, operation, maintenance and management issues. Common problems in centrifugal pumps pumping machinery. Centrifugal pump troubleshooting guide general pump and. The impeller of the centrifugal pump converts the mechanical rotation to the velocity of the liquid. An oilfield solids control system needs many centrifugal pumps to sit on or in mud tanks. Working mechanism of a centrifugal pump a centrifugal pump is one of the simplest pieces of equipment in any process plant. Troubleshooting common issues centrifugal pumps and controls this guide was developed to assist you in troubleshooting common centrifugal pump issues for small turf and irrigation applications 5hp and below. This discussion is limited to the most common pumps in industrial and commercial applicationscentrifugal pumps. Describe the principles of operation of pumping fluid, correctly. Centrifugal pump troubleshooting guide this troubleshooting information is intended to guide in the general determination of pump problems and their solutions.
Seven symptoms and their causes for poor pump performance. Griswold pump company pump operation page 20 installation, operation and maintenance manual. Troubleshooting centrifugal pumps and their systems. Know and understand centrifugal pumps \ r i \ suction piping. Each manufacturer normally provides a description of warranty conditions. A predominant condition requiring troubleshooting expertise in centrifugal pumps is referred to as cavitation. Troubleshooting be proactive in resolving any lubricationrelated pump problems.
These pumps must not be used to pump any fluid other than those specified for the order. Basic concepts of operation, maintenance, and troubleshooting part ii, understanding cavitation introduction in part i of the article, two basic requirements for trouble free operation and longer service life of centrifugal pumps are mentioned in brief. Checklist of problems vvith centrifugal pumps and their causes. When a newlyrepaired pump performs poorly, good troubleshooting procedures can help eliminate a number of possibilitiesincluding problems with the fluid being pumped the pumpage or with the pipes, fittings or vessels that are connected to the pump the system. When you have issues with your irrigation project, ewing is here to help. Parallel operation of pumps unsuitable for such operation mechanical troubles 22. The centrifugal pumps are the frequently used pumps, and the flow of fluid makes them useful in several applications like industries, pressure boosting, water supplying, domestic necessities, support fire defense systems, regulating boiler water, and sewage drainage, etc. Some of the major applications include the following.
Basics concepts of operation, maintenance, and troubleshooting, part i. The basic centrifugal pump consists of two main elements. Diagnostic chart for centrifugal pump troubles source of document unknown. Diagnostic chart for centrifugal pump troubles source of document unknown problem possible causes. Cpm303 centrifugal pump maintenance, troubleshooting. A mechanical component fails due to either a decrease in its. The information provided in this document is given in good faith, but alfa laval is not able to accept any responsibility for the accuracy of its content, or any consequences that may arise from the use of the information supplied or materials described. Mckee, gareth forbes, ilyas mazhar, rodney entwistle and ian howard curtin university, western australia summary. Solutions to common centrifugal pump problems pumps. Pump overheats and seizes 142021232627343540 list of possible causes suction troubles 1. In colder climates, to prevent waxing of the reclassifiers, an iso 68 pao or diester is recommended. Troubleshooting common issues centrifugal pumps and. Introducation centrifugal pumps are the most widely used type of pumps in domestic, agricultural and industrial applications. Several different ansi end suction pumps are disassembled, checked, and reassembled to industrial standards.
Coverage includes pump classifications, types and criteria for selection, as well as practical information on the use of pumps, such as how to. The performance curves in figure 1 illustrate how the head, flow rate, efficiency and power relate to one another for a typical centrifugal pump. This collects the displaced fluid and directs it into the piping. They are defined for their different functions, but their working principle is the same.
The guide outlines common pumping problems and failures with probable causes and procedures for checking and correcting possible faults. Operation and maintenance manual s200 series centrifugal. Next, it provides guidance on when to withdraw a pump from service for repair and how it should be subsequently treated. More paragraphs have been penned on this topic than on every other aspect of pumping combined, yet the vast majority of the worlds pumps have never experienced the problem. For more indepth troubleshooting information for centrifugal pumps and pump controls, check out munros troubleshooting guide in english and spanish. For those who want to do detail calculations, some examples have been included in the appendices. Centrifugal pump troubleshooting guide this material was reproduced from practical machinery management for process plants. Centrifugal pumps centrifugal pumps are the most widely used type of pump for the transfer of liquids. Download troubleshooting centrifugal pumps and their systems in pdf and epub formats for free.
Centrifugal pump users guidebook problems and solutions. Centrifugal pump users guidebook problems and solutions by sam yedidiah. The centrifugal force arises because the radius at which an individual particle leaves the impeller is larger than that at which it enters. Basics concepts of operation, maintenance, and troubleshooting, part i by. Pdf download troubleshooting centrifugal pumps and their. This tutorial is intended for anyone that has an interest in centrifugal pumps. The most common type of pump is the centrifugal pump. There is no math, just simple explanations of how pump systems work and how to select a centrifugal pump. Pdf centrifugal pump usage has increased over the past year due to its importance and efficiency. Pacer pumps lancaster pa, industrial pumps, consumer. The types of centrifugal pumps used are sand pumps, submersible slurry pumps, shear pumps, and charging pumps.
In warmer climates, a lowwax iso 68 or 100 typically is used. In addition, this paper contains a comparison and critique of. Positive displacement pumps allow liquid to flow into an open cavity trap the liquid in the pump transport liquid from the suction to discharge port mechanically force liquid out of the pump. Over 80 percentage of all the pumps used are singlestage, endsuction type centrifugal pumps. The impeller has a uniform blade length, b, of 2 in. Call the ewing pump hotline for troubleshooting and product selection assistance at 1844pumppro. Pumps typically run for years with very little maintenance. The pump cannot suck on or draw the liquid into the pump. Operation and maintenance manual s200 series centrifugal pumps read and understand this manual prior to installing, operating or servicing this equipment. Endsuction centrifugal pumps are the most common pump used in irrigation systems. Centrifugal pump troubleshooting chart free download as word doc. Cavitation is a serious operationaltype problem that arises from the low pressure in the pump suction side. Geitner by permission of the publisherbutterworth heinemann of 225 wildwood avenue, woburn ma.
Checklist of problems vvith centrifugal pumps and their causes centrifugal pumps are one of the worlds most commonly used devices. Lawn sprinkling irrigation air conditioning systems heat pumps water transfer and dewatering features and benefits selfpriming design fully serviceable fda compliant impeller corrosion resistant powered for continuous operation. Another difficulty is that the same lack of skill and experience is creating many of these problems in the first place. The course covers centrifugal pumps and pump theory including how to read a pump curve and select the proper pump for the job. Centrifugal pumps working and applications elprocus. Pdf design and analysis of centrifugal pump impeller for. The rotating element which includes an impeller and a shaft. There are many advantages and disadvantages associated with centrifugal pumps. Troubleshooting centrifugal pumps and their systems book also available for read online, mobi, docx and mobile and kindle reading. There aretwo basic types of pumps used in water and wastewater systems. Centrifugal fire pump principles of operation, inspection. The fluid must be available to the pump with sufficient energy so that the pump can work with the fluids energy. This book may be of interest and assistance to people with different levels of education and training. This chapter discusses some common operationaltype problems in centrifugal pumps.
Improper operation of centrifugal pumps can result in damage to the pump and loss of function of the system that the pump is installed in. Gas in fluid change with centrifugal pump dry run of gland seal replace gland seal and make sure that there is fluid in side. It explores that most centrifugal pumps are purchased to stimulate flow. Pull pump and inspect for bent shaft, straighten bent shaft. Centrifugal pumps develop pressure by increasing the velocity of the liquid liquid is literally flung out of the cutwater. This troubleshooting information is intended to guide in the general determination of pump problems and their. If you need additional assistance, please contact munro pump at 1. Troubleshooting common issues centrifugal pumps and controls. Maintenance of centrifugal pumps proper maintenance of a cf pump is important to ensure its troublefree and long service the maintenance operations of cf pump includes.
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