The performance of a pump is dependent on the impeller and casing geometry, the size of the pump, the rotational speed and the properties of the flowing fluid. In the software, rename the current blank results table to 50% this will be. Centrifugal pump performance test inspection for industry. The performance curves generated by many pump manufacturers are based on results obtained in their test facilities under tightly controlled conditions. Dec 17, 2011 the performance curves generated by many pump manufacturers are based on results obtained in their test facilities under tightly controlled conditions. The test receiving the fail is repeated until it receives a pass. 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 results of performance tests of a centrifugal pump in the cavitation region. Performance testing procedure for centrifugal pumps flow. As not to damage the internal parts of the pump open the discharge valve slightly till the flow rate reaches the first value indicated in pump performance curve provided by pump supplier. In this experiment, pump system performance will be determined.
A simple stepbystep guide to checking a water pump. The pump system is schematically described in figure1 the flow rate is adjusted from the discharge valve, located after the pump. Centrifugal pumps pump curves real pumps are never ideal and the performance of the pumps are determined experimentally by the manufacturer and typically given in terms of graphs or pump curves. Characteristic curves for a centrifugal pump examining figure 3, the general performance of the pump can be determined. Performance test is a critical step to ensure that the purchased pump can deliver the fluid meet with the requirement.
This procedure is applicable for testing of centrifugal pumps of mather and platt pumps ltd. Working mechanism of a centrifugal pump a centrifugal pump is one of the simplest pieces of equipment in any process plant. It is made up of four to five points, each point being obtained from a separate npsh test at a different constant flow. Jan 24, 2017 performance test centrifugal pump lab experiment. In that npshr test is usually carried out whenever the npsh margin is less than 1 meter. Performance testing can be complex and should account for a multitude of variables. Its purpose is to convert energy of a prime mover a electric motor or turbine first into velocity or kinetic energy and then into pressure energy of a fluid that is being pumped. Centrifugal pump performance test industrial inspection. For radial centrifugal, mixed flow and axial flow pumps there are three acceptance test standards namely class a, b and c in the iso code which basically differ by the amount of the overall tolerances of the performance data and by the permissible measurement tolerances.
This is normally carried out after the abovementioned tests. The results obtained from this study conclude that high viscosity results in rapid enhancement in the friction and hydraulic losses and correspondingly decrease in the centrifugal pump performance. Measurement of the characteristics of a centrifugal pump. Pdf a study on performance characteristics of a centrifugal pump was. Here we will have a look at the procedure to strip, inspect and reassemble a centrifugal pump, forming part of the planned maintenance schedule on board ships for the purpose of maintaining the equipment in optimum operating. End users checklist for centrifugal pump performance testing. Third party inspection for centrifugal pump mechanical running test when required by the contract or purchase order, where the pump runs for a predetermined time depending on its type, the pump and its driver will be as complete as possible. A pump performance test ensures that actual pump performance matches with the numbers provided by supplier. Fluid mechanics centrifugal pump performance experiment 1. Driving units used to perform the test will be a calibrated electric motor, dynamometer or the customers electric motor.
To make use of it, the valves in the test rig must be set so that all. Apr 19, 2018 a simple stepbystep guide to checking a water pump. That is, analyze the system to determine the pump head required as a function of flow rate through the pump this will form the system line. On the centrifugal pumps performance curves estimation. Centrifugal pump maintenance procedures for industrial pumps march 29, 2018 cortech staff cortech, pump efficiency, pump optimization producing oil and gas calls for working with sound equipment that can handle big jobs, and the centrifugal pump is one of the most integral components in the oil and gas industry. The performance or characteristic curve of the pump. May 03, 2018 it is made up of four to five points, each point being obtained from a separate npsh test at a different constant flow.
Pdf experimental study on performance characteristics of a small. Date 112196 centrifugal fire pump principles of operation, inspection tests. Scope of test, type of test, test class and guarantee values are defined by standardized test plans agreed between pump manufacturer and pump purchaser. The h tq curve shows the relationship between head and flow rate. Experimental analysis of performance of centrifugal pump. Performance testing procedure for centrifugal pumps free download as word doc. Pdf a new method to calculate centrifugal pump performance. Casing design radial axial radial axial stage casing. Perhaps, these two processes of energy dissipation may be combined together. If possible, verify the meter diameter before the test as well. Centrifugal pump classification number of stages single stage multistage shaft position horizontal vertical horiz. Pump maintenance michigan water environment association. How to read a centrifugal pump performance curve mechanical. Start the centrifugal pump take the reading of the discharge pressure, flow.
The test procedures, in general, conform to relevant national international standard specifications. The empirical procedure suggested in their publication 3 is based on experimental data and provides a means to determine the centrifugal pumps performance for handling viscous liquids based on the pumps performance in water. Now consider a centrifugal pump is required to pump water from one vessel to another vessel, the pump parameters. Specifically, the pumps test procedure adopted in this final rule incorporates by reference the test procedure from the hydraulic institute histandard 40. The centrifugal pump performance test procedure is carried out as follows, but it may slightly change based on pump vendor test bed condition and internal procedures. Testing of the equipment to be purchased is of great importance from the buyers point of. In the next few sections, the maintenance of centrifugal pumps is explained. There are many performancerelated issues to consider when evaluating and selecting a centrifugal pump for an application, not the least of which is the type of factory performance curve to use pricebook, factory test of the specific pump, or witnessed factory test of the specific pump.
In that npshr test is usually carried out whenever the npsh margin is. Pumps can generate high volume flow rates when pumping against lowpressure head or low volume flow rates when. It should be noted that it is quite impossible for a typical commercial centrifugal pump to match the performance curves obtained by. The performance of centrifugal pumps is only partially determined by analysis testing is usually required. A procedure bas been developed to predict the performance of centrifugal pumps operating with highly viscous fluids it is based on an analysis of the losses in the pump, which reveals that disk. The empirical procedure suggested in their publication 3 is based on experimental data and provides a means to determine the centrifugal pump s performance for handling viscous liquids based on the pump s performance in water. The field pump performance test procedure currently defined and developed by sulzer under contract of prci will provide a practical methodology for testing the pump performance with viscous fluids on site. The performance of centrifugal pumps is only partially determined by analysis testing is usually. Centrifugal pump performance test procedure mechanical. Despite the fact that centrifugal pumps can be, or indeed, have to be tested in situ in the system particularly where a high power input is involved, the pump test facilities used within the field of centrifugal pump technology must be continually improved, adapted or planned all over again. Field performance testing for pipeline pumps sulzer. Fluid mechanics centrifugal pump performance experiment.
High performance in centrifugal pump testing standards in 2011, the hydraulic institute updated their testing standards for centrifugal pumps ansihi 14. Pump performance curve a centrifugal pump performance curve is a tool that shows how a pump will perform in terms of head and flow. The testing techniques used in the field can vary substantially and may or may not provide accurate results. Figure 1 characteristic curve for an ahlstrom apt558 centrifugal open. This content provides you with a sample centrifugal pump performance test procedure in the manufacturing shop. There are many performance related issues to consider when evaluating and selecting a centrifugal pump for an application, not the least of which is the type of factory performance curve to use pricebook, factory test of the specific pump, or witnessed factory test of the specific pump. Third party inspection for centrifugal pump procedure. The following factors which may help are based on api 610. The below figure shows a basic centrifugal pump test circuit. A ships engine room contains several different types of pumps including centrifugal pumps.
Test loop designs can vary both in system design and instrumentation selection. Experimental analysis of performance o f centrifugal pump aashay desai 1, umair siddiqui 2, sher afghan k han 3, emaad ansari 4 1 mechanical engineering department, nmims, i ndia. Make sure that the actual pump speed matches the speed of the pumps characteristic curve to. Pdf laboratory report centrifugal pump anh phuong le vu. Practical methods for fffild performance testing centrifugal compressors 167 test.
Pumps can generate high volume flow rates when pumping against lowpressure head or low volume flow rates when pumping against highpressure head. Pdf experimental analysis of performance of centrifugal pump. Switch on the fm50 pump within the software using the pump on button. The results of the tests on site and in house will provide the base for corrective calculations. What is total head 10 what is the relationship between head and total head 11.
In this experiment centrifugal pump is used domak slg1 1 hp. Performance test of a split case pump at multiple speeds using vfd 2. How to select a centrifugal pump examples of total head calculations sizing a pump for a home owner application 14. Bourdon gages are mounted at the suction and discharge sides of the pump. Overhauling centrifugal pumps procedure to dismantle and. Lets do an example with some tests results that i gathered recently. Centrifugal, mixed and axial flow pumps, methods of test, university. This procedure is meant as a starting point for developing a sample lab using the pumplabtm system. Temperature measurements this test is run to verify the assumption that temperature is constant. An example of this type of graphical representation of pump performance is given in figure 2. Centrifugal fire pump principles of operation, inspection. This description of procedure defines the conditions for the hydraulic testing of centrifugal pumps according to api standard 610.