testing hvac centrifugal pumps

... EBARA PUMPS EUROPE S.p.A CENTRIFUGAL PUMPS SELECTION CHART series - version 50 Hz Rev D For pump 50-125/2,2 only 3M-3LM version 206 EBARA PUMPS EUROPE S.p.A 3 series - version CENTRIFUGAL PUMPS ... phase 400 EBARA PUMPS EUROPE S.p.A 3series - version CENTRIFUGAL PUMPS DIMENSIONS 3M-3LM 50 Hz Rev D Pump type 50-200/15 401 EBARA PUMPS EUROPE S.p.A 3 series - version CENTRIFUGAL PUMPS 3S-3LS ... PUMPS EUROPE S.p.A 3 series - version CENTRIFUGAL PUMPS CONSTRUCTIONS 3M-3LM 50 Hz Rev D DIAGRAM AND ELECTRIC CONNECTIONS THREE PHASE MOTOR 305 EBARA PUMPS EUROPE S.p.A 3 series - version CENTRIFUGAL...

Ngày tải lên: 30/03/2014, 11:20

... manufacturers of and usersof centrifugal pumps The objectiveof this standardis to providea purchase specification to facilitate the manufacture and procurement of centrifugal pumps for use in petroleum, ... of small pumps or preclude the use of high specific speed pumps Small pumps, which are known to operate satisfactorily at flows outside the specified limits, and high specific speed pumps, which ... SECTION S”PECIF1, C PUMP TYPES 5.1 Single Stage Overhung Pumps 5.2 Between Bearings Pumps 5.3 Vertically Suspended Pumps 4-1 4-1 4-2 4-4 5-1 5-2 5-6 SECTION 6-VENDOR’S...

Ngày tải lên: 02/04/2014, 15:32

... radial forces 525 9.3.3 Pumps with single volutes 526 9.3.4 Pumps with double volutes 531 9.3.5 Pumps with annular casings .532 9.3.6 Diffuser pumps .533 9.3.7 ... Single-stage pumps with single-entry overhung impeller 511 9.2.3 Multistage pumps .515 9.2.4 Double-entry impellers 519 9.2.5 Semi-axial impellers .520 9.2.6 Axial pumps ... skills, sophisticated engineering and extensive testing When attempting to describe the state-of-the-art in hydraulic engineering of centrifugal pumps, the focus is necessarily on the high-tech...

Ngày tải lên: 02/04/2014, 15:33

... Energy Efficiency of Centrifugal Pumps 95 Trinath Sahoo 63 Preface The centrifugal pumps with the actual configuration constitute a machine widely used for more than 150 years The pumps are analyzed ... Head of the high-speed centrifugal pump /m 97.01 98.21 98.12 98.90 Table Head of the high-speed centrifugal pump Centrifugal Pumps Table shows that the head of the high-speed centrifugal pump is ... stable cavitation performance of centrifugal pumps has been put forward Poor cavitation performance is one of the key problems in low specific speed centrifugal pumps The most effective method...

Ngày tải lên: 27/06/2014, 11:20

... displacement pumps Centrifugal pumps Conceptual difference Centrifugal volute pumps Types of centrifugal pumps Overhung impeller Impeller between the bearings Turbine pumps Specific duty pumps The ... The typical ANSI pump API (American Petroleum Institute) pumps Vertical turbine pumps Non-metallic pumps Magnetic drive pumps Canned motor pumps Pump impellers Turbine impellers Conventional impellers ... a pumping ring) between both sets of faces on: w Vertical pumps w Lift pumps and pumps in suction lift conditions w Pumps in vacuum w Pumps operating to the right of their best efficiency point...

Ngày tải lên: 27/06/2014, 17:20

... Dewatering Pumps Wet Pit Pumps Water Supply Pumps Condenser Cooling Water Pumps Cooling Tower Pumps Flood Control Pumps Transfer Pumps Barrel-Mounted or Can-Mounted Pumps Condensate and Heater Drain Pumps ... Vertical Pumps 113 by Erik B, Fiske Configurations Well Pumps Wet Pit Pumps Barrel-Mounted or Can-Mounted Pumps Applications Well Pumps Water Well Pumps Incline-Mounted Pumps Cavvi ern Pumps, Mine ... CENTRIFIUGAL PUMPS Design & application Second Edition This page intentiTonally left blank CENTRIFUGAL PUMPS Design & Application Second Edition Val S Lobanoff Robert R Ross CENTRIFUGAL PUMPS Design...

Ngày tải lên: 29/06/2014, 16:20

... displacement pumps Centrifugal pumps Conceptual difference Centrifugal volute pumps Types of centrifugal pumps Overhung impeller Impeller between the bearings Turbine pumps Specific duty pumps The ... The typical ANSI pump API (American Petroleum Institute) pumps Vertical turbine pumps Non-metallic pumps Magnetic drive pumps Canned motor pumps Pump impellers Turbine impellers Conventional impellers ... British Library Cataloguing in Publication Data Bachus, Larry Know and understand centrifugal pumps 1 .Centrifugal pumps I.Title II.Custodio, Angel 62 1.6’7 ISBN 1856174093 N o responsibility is...

Ngày tải lên: 13/08/2014, 09:21

... suction impeller pumps are for low NPSH applications Use nvo smaller pumps in parallel Use a larger/slowcr pump Inadequate NPSHa causes stress, vibration and maintenance on pumps because there ... These heads are discussed in Chapter The head formula is the following: Know and Understand Centrifugal Pumps Where: H = head P = psi d = density Pressure can be converted into head with the following ... chamber pressure must be within the limits of the mechanical seal This Know and Understand Centrifugal Pumps P - - I sp.gr = 1.25 Figure 1-4 _- sp.gr = 1.OO sp.gr = 0.75 ~~~ pressure is very...

Ngày tải lên: 13/08/2014, 09:21

... a pumping ring) between both sets of faces on: w Vertical pumps w Lift pumps and pumps in suction lift conditions w Pumps in vacuum w Pumps operating to the right of their best efficiency point ... opening and closing valves VFDs work well on most PD pumps, and also centrifugal pumps performing a flow service Remember that some centrifugal pumps are required to comply with head, pressure and ... suffer cavitation Pumps that fill and drain tanks from the bottom tend to suffer cavitation The last pump drawing on a suction header tends to cavitate And of course vacuum pumps and pumps in a high...

Ngày tải lên: 13/08/2014, 09:21

... flow 53 Know and Understand Centrifugal Pumps Centrifug a I pumps ~ ~ ~~ - ~ Centrifugal pumps perform the same function as PD pumps, but they it differently These pumps generate pressure by accelerating, ... centrifugal pumps About 90% of the pumps in industry are centrifugal pumps And the PD pumps found in industry have much in common with their centrifugal sisters They are mostly rotary designed pumps, ... existing pumps are centrifugal, and the other half are PDpumps Actually, it’s possible that there are more PD pump designs than centrifugal pump designs, and a higher population of PD pumps in...

Ngày tải lên: 13/08/2014, 09:21

... Know and Understand Centrifugal Pumps i Figure 6-14 ~- ~ ~ ~- ~~ ~ ~~ - - discharge head It makes for a small piece of iron that packs an amazing punch Regenerative turbine pumps are found on ... that is easily understood and comparable t o other Nss values o f competing pumps, similar pumps, and totally different pumps The Nss value is a dimensionless number relating the speed, flow and ... the pumps This is the source of many problems with pumps History ~ Some three thousand years ago, the ancient Romans and Greeks understood the hydraulic laws that govern today’s modern pumps...

Ngày tải lên: 13/08/2014, 09:21

... operate the pumps and understood by them Special design pumps ~ ~~ The majority of centrifugal pumps have performance curves with the aforementioned profiles Of course, special design pumps have ... pumps have curves with variations For example, positive displacement pumps, multi-stage pumps, regenerative turbine type pumps, and pumps with a high specific speed (Ns) fall outside the norm But ... curve are similar to other centrifugal pumps See the following curve (Figure 7-12) m 0.7 35 9.1 30 7.6 25 6.1 20 4.6 15 3.0 10 1.5 0 n I m Know and Understand Centrifugal Pumps Figure 7-13 ~- ~~...

Ngày tải lên: 13/08/2014, 09:21

... Understand Centrifugal Pumps liquid from a common system, and discharging the liquid into the same common system Two pumps running in parallel offer twice the flow at the same head Pumps in series ... arrangement of pumps in parallel Pumps in parallel ~~ The system is designed so that two equal pumps are operating together side by side The system can support the production of both pumps If the ... happens, you need to consider an arrangement of pumps running in parallel, or in series, or in a combination of the two Pumps in parallel are two or more pumps working side by side, taking the The...

Ngày tải lên: 13/08/2014, 09:21

... curve of the pumps running in series Combined parallel and series pump operation ~~ Finally, we consider an arrangement of pumps running in combination Know and Understand Centrifugal Pumps Figure ... three or four pumps Actually there is no option to run three pumps in this The System Curve arrangement Any three pumps, by the system design, indicate that you’ll be operating two pumps on one ... two pumps keeping it closed So in practice, you can operate any one pump, or any two pumps (with the aforementioned hints from the parallel operation section), or four pumps, but not three pumps...

Ngày tải lên: 13/08/2014, 09:21

... determine the adjustments required, and the spacing shims under each foot Know and Understand Centrifugal Pumps Rim and face alignment This method is most useful when only one of the shafts can be ... adjacent space to perform maintenance, alignment and proper cooling 147 Know and Understand Centrifugal Pumps The grout should be the correct type for the climate and application temperature, speeds, ... and grouting is fully cured, and all foundation bolts are tightened 149 Know and Understand Centrifugal Pumps €4 lncorrrect Correct Figure 10-11 Bring the pipe to the pump and adjust it to the pump...

Ngày tải lên: 13/08/2014, 09:21

... and Understand Centrifugal Pumps and space of the complicated camshaft mechanisms and gears were eliminated O n land, the electric motor opened the door to the first practical centrifugal pump ... temperature and level sensors to monitor the bearings Figure 11-3 ~ 167 I Know and Understand Centrifugal Pumps The labyrinth seal The word labyrinth means ‘a tortured pathway’ In the Dark Ages, elaborate ... whether the pump is running or off The lip seal The lip seal, or oil seal, used o n modern centrifugal pumps is borrowed from the automotive industry The lip seal was born with the invention of...

Ngày tải lên: 13/08/2014, 09:21

... suction bypass connection with low vapor head (Figure 13-5) Fiaure 13-5 185 Know and Understand Centrifugal Pumps The single, outside-mounted, unbalanced seal This type of seal has the rotary component ... elastomeric compounds are available in the O-ring configuration Fiaure 13-7 187 Know and Understand Centrifugal Pumps 4.New materials - As soon as a new elastomer compound is developed, it becomes available ... pressure and force between the faces, thereby generating less heat 189 Know and Understand Centrifugal Pumps Compensates Operational Practices - It’s a common practice in many plants to close or...

Ngày tải lên: 13/08/2014, 09:21

... seals Many packed pumps have an installed discharge bypass line running from the discharge nozzle of the pump to the packing box This line 221 Know and Understand Centrifugal Pumps damages most ... limits (upper and lower) and the chemicals they are compatible with Know and Understand Centrifugal Pumps Figure 14-3 Chemical attack Figure 14-4 Extrusion Extrusion Extrusion is deformation ... be free to move and flex with the seal (Figure 14-8) \ Fiaure 14-8 209 Know and Understand Centrifugal Pumps The pump shaft must be free to slide through the O-ring However, crystallizing liquids,...

Ngày tải lên: 13/08/2014, 09:21

... Understand Centrifugal Pumps Although about half of all pumps manufactured in the world are centrifugal (the other half are positive displacement), industry tends to use a higher quantity of centrifugal ... applicable to PD pumps as centrifugal pumps So in this chapter of failure analysis and corrective methods, we decided to consider some problems, symptoms, and remedies particular to I’D pumps We’re ... through the list, you’ll see again that PD pumps and centrifugal pumps have a lot in common Enjoy SYMPTOMS AND CAUSES OF FAILURE FOR POSITIVE DISPLACEMENT PUMPS Symptom Possible Cause Pump fails...

Ngày tải lên: 13/08/2014, 09:21

... you should have 60 inches of straight pipe before the first elbow 245 Know and Understand Centrifugal Pumps INCORRECT "J Concentric reducer - CORRECT Figure 17-17 Use an eccentric pipe reducer ... cavitation, 25 preventing cavitation, 35 turbulence cavitation, 34 vaporization capitation, 29 centrifugal pump, 3,54 centrifugal volute pump, 56 chemical attack, 207 compression packing, 175 compression ... 204 ozone attack, 209 packing lubricant, 178 graphite, 178 mica 178 249 Know and Understand Centrifugal Pumps molybdenum disulfide (moly grease), 178 Pascal’s Law, perfluorocarbon, 206 pipe strain,...

Ngày tải lên: 13/08/2014, 09:21