2006-11:1I know that water hammer can do substantial damage to pumps and piping. What can be done to remove this threat?

2006-11:2I have seen vertical turbine pumps that are built with vertical hollow shaft motors and others with vertical solid shaft motors. What factors would lead to one design or the other?

2006-11:3Mechanical seal failure represents most of the causes for pump repair in our plant, with unscheduled shutdown and loss of production. What can be done to relieve this problem?

2006-12:1I know that slurries require special attention when being pumped. What characteristics of slurries should be given consideration when specifying a rotodynamic pump?

2006-12:2When pumping volatile liquids, such as solvents and some petroleum products, will the vapors cause any problems with vapor binding or insufficient NPSH available?

2006-12:3Some pump instructions refer to non-Newtonian liquids. What does this mean?

2007-01:1I have been told that centrifugal pump impellers may still cavitate when operating with NPSH Available greater than NPSH Required. Is this true? If so, why do pump suppliers show NPSHR values when they know that cavitation may occur?

2007-01:2What is pump critical speed and how is it determined? I understand that operation at critical speed could damage the pump.

2007-01:3Is there a preferred sequence for starting reciprocating power pumps, and if so please describe it?

2007-02:2How do I evaluate the capability of a pump on a given system to know if it is capable of withstanding the expected forces and moments from pipe strains?

2007-02:3What is the limit of the amount of air or gas that can be entrained in the liquid that is being pumped and what is the affect of the gas? What can be done to increase the allowable limit?

2007-03:3What are the most commonly used methods for priming a pump?

2007-04:3What is the most practical way to measure the vibration level of canned motor and magnetic drive pumps?

2007-05:1What is a steam pump? How does it work and where is it used? A. Properly called a Direct Acting Steam Pump, it is a reciprocating (steam) engine and a pump

2007-05:2Is there a guideline for decontamination of pump parts when it is necessary to send them out for repair? We operate a chemical plant with over 1000 pumps and often find this necessary.

2007-05:3What should we look for when buying pumps for slurry applications? The literature is quite confusing with alternatives including hard metals of different types as well as soft elastomers.

2007-06:1I understand that cavitation in impellers can still occur when NPSH Available is higher than NPSH Required. Many pumps apparently operate this way. What properties are important for when selecting cavitation resistant materials for impellers?

2007-06:2What should we consider when selecting pumps for condensate service in electric power generating plants?

2007-07:1Rotary pumps are relatively simple and usually inexpensive. Where are they most frequently used, and why are they not more commonly used? A.

2007-07:2Rotary pumps are relatively simple and usually inexpensive. Where are they most frequently used, and why are they not more commonly used? A. Rotary pumps excel in applications with viscous liquids. There is no practical upper limit of

2007-08:1How is the maximum allowable working pressure of a centrifugal pump established? A. The maximum allowable working pressure (MAWP) of a centrifugal

2007-08:2Is there a way of predicting the maximum operating speed for a reciprocating plunger pump when pumping a viscous liquid?

2007-08:3What special requirements should we look for when ordering condenser circulating pumps for a large electric generating plant? A. Condenser circulating water pumps take cool water from a river, lake, stream or cooling tower basin and circulate it through the

2007-09:1What are the most probable causes of insufficient discharge flow or pressure in centrifugal pumps?

2007-09:2We have a 100 hp end suction pump that has a broken shaft. What are the causes of shaft breakage?

2007-09:3What is an inducer and how does it work?

2007-10:1Is it true that centrifugal pumps should be built with ball bearings that have greater than normal internal clearance?

2007-10:2I have read that pumps with high suction energy level are more susceptible to cavitation damage than low suction energy level. Is this true and how is high suction energy defined? A. Yes, pumps with high suction energy level are generally more likely to suff.

2007-10:3What is the purpose of putting vacuum valves or vacuum breakers in pump discharge piping? How does this affect the pump performance? The pump is handling ambient temperature water.

2007-11:1We need to increase flow through our system and plan on adding a second pump in parallel to the existing pump. Are there any pitfalls in doing this and how can they be avoided?

2007-11:2The shaft of our vertical turbine well pump sometimes rises up and disconnects from the top of the driver. What causes this and how can it be corrected?

2007-11:3What is the best method for the measurement of rate of flow of viscous liquids?

2007-12:1Many articles are being written about life cycle cost as applied to the purchase of pumps. How much of this information is also applicable to existing pump installations?

2007-12:2How is the performance of air operated diaphragm pumps affected by the viscosity and specific gravity of the liquid?

2007-12:3What is discharge recirculation and what damage does it do to pumps? Can changes to the pump be made to correct this problem?

2008-01:1Most centrifugal pumps have a horsepower characteristic curve which rises as rate of flow increases to some level and then levels off or turns downward. However, other pumps have more level power curves or even some that are higher at low rate of low. Why is this, and can it be a problem?

2008-01:2With the increasing emphasis on energy conservation, turbines are being installed on sources of hydraulic power that are normally wasted. Is it necessary to install small turbines in such cases or can centrifugal pumps running backwards be used?

2008-01:3Is there a simple way to determine the minimum submergence required for a large vertical turbine pump to prevent the formation of surface vortices and the entrance of air into the pump?

2008-02:1When a centrifugal pump impeller is reduced in diameter to reduced total head and rate of flow, the affinity rules predict that the new rate of flow is equal to the original rate of flow times the ratio of the new diameter to the old as in the equation Q2= Q1x D2/D1. On the other hand, if the model of a larger pump is made to a smaller size to facilitate testing, the rate of flow is predicted as the cube of the diameter ratio or Q2= Q1 x (D2/D1)3. Why are these two equations different?

2008-02:2How do pump manufacturers decide what rate of flow and total head to use when designing pumps which are to be used in their standard product lines? Is there some logic and reasoning for this or is it based on demand?

2008-02:3We are installing a multistage pump and plan on using a reduced voltage starter. Is this practical and what precautions should be taken?

2008-03:1When installing a horizontal pump, is it better to grout the pump baseplate or let it float free? Different sources provide opposing views on this subject.

2008-03:2I understand that the efficiency of variable speed drives is reduced as operating speed and power is reduced. Does this negate the power saving from the accompanying reduction in pump speed?

2008-04:1We are operating a centrifugal pump and a recent change in the system has resulted in a deficiency of about five to ten percent in the rate of flow. Can anything be done to the pump to increase the flow to meet our needs?

2008-04:2For slurry applications, we have observed that centrifugal pumps that develop higher heads are limited in their operation. Can reciprocating pumps be used in these applications? If so, are any special design features necessary to handle slurries?

2008-04:3Pumps operating in wet pit applications often suffer from the accumulation of grit or other solid material which accumulates near the pump inlet. This requires draining of the pit or removal of the pump to remove the solids. Is there a better way?

2008-05:1I have heard that the rate of flow through centrifugal pumps can be regulated by submergence control instead of by throttling the pump discharge. How does this work, and does it cause damage to the pump?

2008-05:2I have an older pump with a pump model but an obsolete address on the nameplate. How can I locate the supplier in order to get information about the pump and purchase replacement parts?

2008-05:3We are considering the use of a magnetic drive pump for handling toxic liquids. The containment shell between the inner and outer magnet assemblies is very thin. We have concerns about wear in the shell and leakage of the liquid. Is our concern valid, and what can be done to protect against leakage?

2008-06:1I know that a centrifugal pump can overheat badly if run at shut off too long, but how can I determine the minimum rate of flow through the pump to avoid excess temperature build up?

2008-06:2When measuring vibration on vertical pumps, does the allowable vibration depend on the height of the motor, or on the height above the baseplate at which the readings are taken?

2008-06:3What is a Pitot Tube Pump?

2008-08:01What is the maximum pumped liquid temperature that can be handled by an end suction centrifugal pump, and what must be done to a pump for it to operate successfully at that temperature?

2008-08:02What is the effect of higher elevation above sea level on the NPSH required by a pump? For example does a pump require more NPSH in Denver than at sea level? If so, is there a simple way of correcting for this?

2008-08:03What is water hammer, what causes it, and is it damaging to the pump or system?

2008-09:01When operating centrifugal pumps on corrosive or erosive applications, how can the user determine when the casing wall is worn too thin for safe operation? What is the minimum safe operating wall thickness?

2008-09:02What is the best way to avoid excessive pipe strains on a pump caused by expansion in piping due to temperature change? Are expansion joints a viable solution?

2008-09:03In applications where NPSH available is low, it is often necessary to apply an oversized centrifugal pump that operates at 50 percent of its design flow rate to obtain a pump with low NPSH required values. What is the downside of doing this?

2008-10:01What is a free standing baseplate and when should it be used? Are there any special design requirements?

2008-10:02Do rotary pumps have the same problems as centrifugal pumps when pumping liquids with entrained air or gas?

2008-10:03I understand that vertical can pumps can operate with very low values of NPSH available, such as on condensate service. What is a vertical can pump and how does it work with such low NPSHA?

2008-11:03How can we determine how much flow a mechanical seal requires to provide adequate flushing?

2008-12:01Our office building has a pump room in the basement, which causes sufficient noise to be bothersome to the people in the office above it. What can be done to reduce the noise?

2008-12:02Can rotary type pumps be used to pump slurries? If so, are there any special cautions?

2008-3:3After installing a new 20-hp centrifugal pump, we checked its performance and found that the total head was 10 percent below the guaranteed point. The system-head curve was checked and determined to be as predicted. Before we contact the supplier, is there something we should check?

2009-01:2When installing a 15,000-gpm rotodynamic (vertical) pump, is there a method for determining the required submergence of the pump inlet opening below the water surface to prevent the formation of free surface vortices?

2009-01:3What is the hydrocarbon correction for NPSH required by a centrifugal pump and what are the correction values?

2009-02:1We are expanding some of our buildings and need to replace the existing fire pumps. What are the technical requirements for such pumps?

2009-02:2Our plant operates a number of centrifugal pumps with ball bearings, and bearing failure is the most common cause of unscheduled pump shut down. What should be the average life of pump bearings and what can be done to improve it?

2009-02:3What can be done to ensure better lubrication and increase the life of bearings in sealless pumps?

2009-03:1How can we tell if a pumping system is designed and operated properly? Some problems such as leaking seals are obvious, but should we watch for any other symptoms?

2009-04:1We have recently installed several double suction between bearing pumps and would like to verify that their vibration levels are within acceptable limits. How should this be done, and what is an acceptable upper limit for such vibration?

2009-04:2How can we determine the proper size for the intake sump to accommodate several vertical turbine pumps taking input from a river?

2009-04:3What is the most effective way to reduce energy consumption in existing centrifugal pump installations?

2009-05:1What can be done to avoid the high-pressure differential from rupturing the diaphragm in reciprocating diaphragm pumps?

2009-05:2What are non-clog pumps, and what is unique about their design?

2009-05:3What can be done to ensure better lubrication and increase the life of bearings in sealless pumps?

2009-06:1What are the criteria for determining the maximum allowable forces and moments that can act on a centrifugal pumps nozzles without damaging the pump? What part of a pump is most likely to be damaged by excessive forces and moments?

2009-06:2What are the most commonly used stainless steel alloys for pumping sulfuric acid?

2009-06-3What design features should we look for in selecting a pump for handling paper stock?

2009-07:1Simplicity and low cost make rotary pumps a good selection for some applications. Is there a simple guide to the maximum rate of flow and discharge pressure for which such pumps can be used?

2009-07:2We are operating a large horizontal centrifugal pump lifting water from a lake, and the rate of flow gradually reduces with time. However, when the pump is restarted, the rate of flow returns to its original, normal value. What is the cause of this problem?

2009-07:3Some engineers refer to ANSI pumps but whenever I conduct a web search on ANSI (American National Standards Institute) a list which is nearly 400 pages long is generated. What does this designation represent?

2009-08:1What causes radial thrust on volute pump impellers? Should the pressure in the volute be uniform with proper design?

2009-08:2What causes some vertical pumps to run backward when shut down, and can this be a problem?

2009-08:3Besides varying pump speed, how can the flow rate from metering pumps be adjusted?

2009-09:1When selecting a vertical turbine pump design, what factors should be considered when determining the use of open or enclosed lineshaft?

2009-09:2Another alternative in determining vertical turbine pump design is solid versus hollow shaft motors. What are the considerations for making that selection?

2009-09:3When installing submersible vertical turbine pumps, what driver characteristics must be considered?

2009-10:1What is the definition of specific speed, to what does it pertain and how is it used?

2009-10:2Our pump room has many different pumps that are all noisy when operating. Is this normal?

2009-11:1What is an acceptable amount of residual unbalance in an impeller after it has been balanced?

2009-11:2The corrosion resistance of polymer materials makes them good choices for many pump parts. However, lower temperature and pressure limits may be a concern. What are the normal temperature and pressure limits for polymers?

2009-11:3Measurement of flow rate through reciprocating pumps is often difficult due to the pulsating flow. What method can provide accurate flow measurement for these pumps?

2010-01:1We are buying a 1,000-hp rotodynamic (centrifugal) pump and are anxious to verify that it will perform in accordance with the manufacturers published rating curve. Can we expect that the pump will actually meet the performance that the published curve shows?

2010-01:2When installing a 15,000-gpm rotodynamic (vertical) pump, is there a method for determining the required submergence of the pump inlet opening below the water surface to prevent the formation of free surface vortices?

2010-01:3What is the hydrocarbon correction for NPSH required by a centrifugal pump and what are the correction values?

2010-02:1We are expanding some of our buildings and need to replace the existing fire pumps. What are the technical requirements for such pumps?

2010-02:2Our plant operates a number of centrifugal pumps with ball bearings, and bearing failure is the most common cause of unscheduled pump shutdown. What should be the average life of pump bearings and what can be done to improve it?

2010-02:3How can the bathtub vortex at the bottom of a pump suction tank be eliminated as the liquid level is drawn down?

2010-03:1How can we tell if a pumping system is designed and operated properly? Some problems such as leaking seals are obvious, but should we watch for any other symptoms?

2010-03:2Higher pump speed usually results in lower pump cost and higher efficiency. How can I determine the maximum practical speed for any given application?

2010-03:3With so much emphasis on power savings, how can we select pumps with reasonably high efficiency?

2010-04:1We have recently installed several double suction between bearing pumps and would like to verify that their vibration levels are within acceptable limits. How should this be done, and what is an acceptable upper limit for such vibration?

2010-04:2How can we determine the proper size for the intake sump to accommodate several vertical turbine pumps taking input from a river?

2010-04:3What is the most effective way to reduce energy consumption in existing centrifugal pump installations?

2010-05:2What are non-clog pumps, and what is unique about their design?

2010-05:3What can be done to ensure better lubrication and increase the life of bearings in sealless pumps?

2010-06:1How carefully must pump impellers be balanced to avoid unacceptable vibration levels when the pump is running?

2010-06:2When purchasing rotodynamic pumps, how can we be assured of selecting pumps with the highest efficiency?

2010-06:3What are boiler feed booster pumps, and why are they necessary?

2010-07:1What determines the value of external forces and moments that can be applied to a pump without causing detrimental effects?

2010-07:2What methods are recommended for determining the acceptable amount of leakage from an operating pump?

2010-07:3We have a problem with the buildup of grit and other solids in our sewage pump sump that require frequent cleaning. What can be done to prevent this?

2010-08:1What is the preferred method for starting reciprocating power pumps?

2010-08:2What is critical speed when referred to a pump?

2010-08:3Why are some rotary pumps built with timing gears and others are not?

2010-09:1How do rotodynamic (centrifugal) pumps perform when handling slurries?

2010-09:2What factors determine the maximum allowable working pressure of a centrifugal pump?

2010-09:3I sometimes see reference to API pumps. What is special about an API pump?

2010-10:1We are frequently replacing the ball bearings in an end suction pump that is pumping hot oil at 700 deg F. Someone has suggested that the bearings should be replaced with C3 fit bearings. What is C3 fit, and how will it improve bearing life?

2010-10:2What causes suction recirculation in pumps? How damaging is it, and what can be done to avoid this condition?

2010-10:3What is the difference between a Newtonian and non-Newtonian fluid?

2010-11:1When selecting a motor for a vertical turbine pump, we need to know the down thrust from the pump so that the capability of the motor thrust bearing can be checked. How can the pump down thrust be calculated?

2010-11:2Can you recommend internet resources that are useful in the selection of pump manufacturers and pump types?

2010-11:3We are operating an end suction pump with a suction lift, and it sounds like it is pumping gravel, but the flow rate is as required. Is this noise due to cavitation, and if so, will it damage the pump?

2010-12:1What are the parameters for pump baseplate design, and why must baseplates be grouted in place?

2010-12:2What are the parameters for pump baseplate design, and why must baseplates be grouted in place?

2010-12:3When purchasing Vertical Turbine Pumps, can the motors be purchased directly from a motor supplier?

2011-01:1For centrifugal pump impellers, what is momentum change, and what is its significance?

2011-01:2I sometimes see reference to NEMA motor design B. What does this refer to? Are there other design types?

2011-01:3What is acceleration head for a reciprocating power pump, and how is it calculated?

2011-02:1What is a dynamic seal in centrifugal pumps?

2011-02:2How important is shaft deflection in rotodynamic (centrifugal) pumps, and how is it determined?

2011-02:3When purchasing vertical turbine pumps, can the motors be purchased directly from a motor supplier?

2011-04:1When monitoring power consumption by a pump, what measurement methods are normally used and for what purpose?

2011-04:2When noise level is a consideration for a pump installation, what parameters should be considered in the pump selection?

2011-04:3What are the factors that cause excess pump vibration, and how can the specific cause be identified?

2011-05:1When pumping a liquid that has a viscosity greater than water, how can the effect of this higher viscosity on the pump performance be estimated?

2011-05:2When maintaining centrifugal pumps, how important is renewing the impeller wearing ring clearance?

2011-05:3What is the typical procedure for conducting a hermetic integrity test on sealless pumps?

2011-06:1When purchasing rotodynamic (centrifugal or vertical) pumps, how can we estimate if the efficiency of the proposed design is the best to be expected for our application?

2011-06:2We are installing a vertical sump pump and need to know how far below the surface the inlet to the pump must be

2011-06:3How is the rate of flow from rotary pumps affected by entrained gas within the liquid?

2011-07:1(2)I see that many pumps for pumping slurries are made of either hard metals or elastomers. Why is this and which is better?

2011-07:2What is suction specific speed, and how is it used?

2011-07:3What care should be taken when designing or selecting reciprocating power pumps for slurry service?

2011-08:1Some slurry applications include froth in the liquid, which affects pump performance. What must be done when selecting centrifugal pumps for such applications?

2011-08:2Is there a standard procedure for measuring airborne sound emitted from industrial pumps?

2011-08:3Radial thrust on impellers in volute casings increases as the rate of flow decreases. Is this also the case in vertical turbine pumps?

2011-09:1What are the recommendations for monitoring pressure in rotodynamic pumps?

2011-09:2Is the NPSH test for reciprocating pumps the same as for rotodynamic (centrifugal) pumps?

2011-09:3What are bearing isolators and how are they used?

2011-10:1Where can I obtain detailed information on improving the efficiency and reliability of pumping systems?

2011-10:2What symptoms are typical indicators of an inefficient pumping system?

2011-10:3Q. Are there any computer tools available to help analyze pumping efficiency in systems? A. Optimizing Pumping Systems A Guide for Improved Energy Efficiency, Reliability, & Performance, the book referenced in the first question, has a list of 26 tools.

2011-11:1What is a balanced mechanical seal, and when is it usually used?

2011-11:2What is a pusher type seal, and what are the advantages of this design?

2011-11:3What is an energy efficient method for controlling the rate of flow in pumping systems?

2011-12:1How is the axial thrust for an end suction impeller calculated?

2011-12:2What is a balancing drum, and how is it used?

2011-12:3When is a regenerative turbine pump used, and how does it work?

2012-01:1When purchasing new rotodynamic pumps, what type of acceptance testing is recommended?

2012-01:2What is a string test, and when should it be specified?

2012-02:1We plan to purchase several slurry pumps and understand that this service is considered severe duty. What guidelines should be followed regarding pump selection based on good wear resistance

2012-02:2Besides the obvious financial benefits derived from energy savings, what are the other important economic benefits of pump systems optimization that affect the total cost of ownership?

2012-02:3What different types of couplings can be used on pumps, and what are their functions?

2012-03:02What is slip and how does it affect pump performance?

2012-03:1We have purchased and plan to install several sealless pumps in our facility and would like to know what procedures and cautions should be followed during installation and commissioning.

2012-04:1What is the recommended instrumentation that should be used for measuring bearing housing vibration on rotodynamic pumps?

2012-04:2The expression NPIPR is used when discussing the characteristics of air-operated diaphragm pumps. What is NPIPR and what is its relationship to acceleration head?

2012-04:3What are some recommendations for dimensioning rectangular intake structures?

2012-05:1What are the typical causes of mechanical seal failure in rotodynamic pumps, and what are the possible leakage paths?

2012-05:2How can rotodynamic pumps be monitored to ensure that the original pump efficiency is maintained?

2012-06:1How can analyzing life-cycle costs help pump owners make decisions about their pumping systems?

2012-06:2What are the effects of varying speed in pumping systems with predominant friction head and systems with high static head?

2012-08:01What is the preferred way to monitor corrosion in a rotodynamic pump?

2012-08:2What is the recommended procedure for installing piston cups on a reciprocating pump?

2012-08:3How is pump displacement for a direct-acting reciprocating steam pump calculated?

2012-09:1We plan to install several controlled-volume metering pumps to control the pH of our process. What is the permissible nozzle loading that this type pump can handle?

2012-09:1(2)Q. We have often heard the expression overhung pump. What is meant by an overhung pump, and how many different types are in this category? A. One type of rotodynamic pump is an overhung pump. In an overhung pump, the

2012-09:2Construction is running behind schedule, and the pumps we have ordered will be shipped about six months prior to installation. What is the recommended storage environment for vertical turbine pumps?

2012-10:1We have recently purchased several magnetically driven rotary pumps for our process and want to know if we need to be aware of any special operational considerations.

2012-10:2Q. I am developing a purchase order for rotodynamic pumps and need guidance in determining what acceptance tests are appropriate for these pumps. A. ANSI HI 14.6 mandates an acceptance test based on pump flow and head delivered. It also

2012-11:02What methods are recommended for measuring pump rate of flow for a controlled volume metering pump? How should we take into account the accuracy of our instrumentation? A. Measuring pump rate of flow for a controlled volume metering pump

2012-11:03What is a hydraulic power recovery turbine, and when could one be used?

2012-11:1Our company recently purchased several controlled-volume metering pumps. What should we include in our purchase order to ensure that these pumps are tested properly?

2012-11:2What methods are recommended for measuring pump rate of flow for a controlled-volume metering pump? How should we take into account the accuracy of our instrumentation?

2012-12:01How should I account for measurement uncertainty when running a hydraulic acceptance performance test of a rotodynamic pump?

2012-12:02Q. What considerations should be made before installing a motor deepwell type VS1 pump? A. When vertical pump types VS0, VS1, VS2, and VS3, either of the lineshaft or submersible type, are to be installed in wells, consideration should be

2012-12:03Where should an expansion joint be placed in the piping for a rotodynamic pump, and what are the limitations for using tie rods near the pump?

2013-01:01When selecting wetted parts for pumps, how much consideration should be given to the temperature of the pumped liquid?

2013-01:02Q. What is a foot valve, and in what pumping application would one be used? A. Foot valves are specially designed check valves used at the inlet of the suction lift line to maintain pump prime, by maintaining liquid over

2013-01:03Q. What are some differences between simplex and duplex air operated pumps? A. For a duplex air operated pump, compressed air is directed into the pump air chamber via the air distribution system. The compressed air is separated from the

2013-02:01How does axial thrust compare among different impeller types for a rotodynamic vertical pump?

2013-02:02How is the net positive inlet pressure required found for a rotary pump?

2013-02:03Q. What is a hydraulic coupled tubular diaphragm as it relates to controlled volume metering pumps? A. A hydraulic coupled tubular diaphragm liquid end (see Figure 7.6) contains a flexible tube, clamped at both ends, that is in direct contact

2013-03:01How do I determine the NPSH3 for a rotodynamic submersible pump?

2013-03:02How should I design trench-type wet wells for the intake of rotodynamic pumps, and how are these different from rectangular intake structures?

2013-03:03What information is available regarding starting torque requirements for a reciprocating power pump with a liquid bypass?

2013-03:04What kind of effects do entrained or dissolved gases in liquids have for rotary pumps?

2013-04:01What are some of the effects of solids on a rotodynamic slurry pump?

2013-04:02How can I monitor the corrosion level within a rotodynamic pump?

2013-05:01Whatare the effects of increasing temperature on the magnetic couplings in a rotary sealless pump?

2013-05:02What information is available to determine the appropriate net positive suction head (NPSH) margin for my rotodynamic pump?

2013-05:03Whatis a rotodynamic pump's reverse runaway speed?

2013-06:01Whatis a rotodynamic vertical pump? What pumps are classified in this way?

2013-06:02What considerations should be made for outdoor rotodynamic pump installations?

2013-06:03What is droop, and does it affect rotodynamic pump operation?

2013-07:01How are chemical metering pumps used in combined-cycle power plant applications?

2013-07:02What kinds of boiler feed pumps are used in a typical 400-megawatt, combined-cycle power plant?

2013-07:03What information is available about hydrostatic pressure tests for rotodynamic pumps?

2013-08:01What information is available regarding boiler circulating pumps for combined-cycle power plant service?

2013-08:02How are auxiliary cooling water pumps used in combined-cycle power plant service, and what pump types can be used?

2013-08:03How should a mounting base be designed and installed for a sealless rotodynamic pump?

2013-09:01What considerations should be made when selecting the proper boiler feed pumps for a typical 400-megawatt, combined-cycle power plant?

2013-09:02Ive heard that residual mechanical unbalance of rotating parts is one factor that affects rotodynamic pump vibration. What information is available regarding this topic?

2013-09:03What should be considered when designing a piping system for process pumps?

2013-10:01Whatare the advantages of single, outside-mounted seals versus that of single, inside-mounted seals?

2013-10:02How can I determine the pump input power for a reciprocatingpump?

2013-10:03What methods are used to cool a motor that drives a rotodynamic pump?

2013-11:01What are some adverse effects that can occur from mechanical processes during pumping operations?

2013-11:02What are some causes of suction recirculation within a rotodynamic pump?

2013-11:03How can I determine NPSH margin requirements for vertical rotodynamic pumps handling hydrocarbon liquids and water at elevated temperatures?

2013-12:01What information is available regarding NPIPA and NPIPR for rotary pumps?

2013-12:02How are rotodynamic vertical pumps with hollow-shaft drivers coupled to the motor?

2013-12:03How can I monitor vibration for a rotodynamic pump?

2014-1:01What are some factors to consider when conducting a life-cycle cost evaluation for a sealless rotary pump?

2014-1:02What are some baseplate designs and considerations for rotodynamic pumps?

2014-1:03What kinds of impellers are used for slurry pump applications?