2 History of Reciprocating pumps In 17th century Egyptians in Alexandria built reciprocating fire pump and and it had all the parts of today’s pump.About Newcomen (Great Britain) built a reciprocating pump using steam engine as the driver.He was the first man to use seam for driving purposes.In Worthington (U.S.A) developed a steam engine driven pump.Then many developments came.
3 History of Centrifugal pumps pumps The inventor ca not be name with assurance.In the 17th century Jordan, an Italian had made some drawing of a centrifugal pumps.In the early 18 century French physicist Papin built a centrifugal pump of primitive design.In 1732 Demouir pumps was put on service in France,In 1818 Andrews ( USA) built a single stage centrifugal pump.Then many developments came in the industry...
4 History of best pumpHuman heart.Everybody knows Who invented.
5 Pumps are used to move liquids 200meters100BarM10 kmsPumps are used to move liquidsfrom a lower pressure system to higher pressureFrom a lower elevation to higher elevationFrom one place to another place at different/same elevation and pressure.
6 Energy needed for pumps= volumetric flow*pressure 200meters100Bar10kmsMPumps add pressure energy to over comeelevation needs ( potential energy)Frictional lossesDelta pressure requirementsEnergy needed for pumps= volumetric flow*pressure
7 Power required for pumping Power = mass X dynamic headPower ( kW)= H Q r/367000H = Total head in meters Q=Flow M3/Hr=Density in Kg/M3Power required for pumpingPower ( kW)= H Q r/35.99H = Total head in barA Q= Flow M3/Hr=Density in Kg/M3Pleased divide by efficiency for actual powerPlease refer Perry
8 How to give energy ?Centrifugal force(throwing)Positive displacement(physically pushing)
11 Parts of a centrifugal pump ImpellerCasingEyeSeal/packingWear ringParts of a centrifugal pump
12 Advantages of centrifugal pumps It simple and easy to construct. Available in different materials .Absence of valves. Less maintenance.High rpm design. Can be coupled to a motor directly.Steady delivery.No damage in delivery is blocked.Smaller in Size when compared to reciprocating type for the same capacity.Can handle slurries.Advantages of centrifugal pumps
13 Dis-Advantages of centrifugal pumps For high pressure we need multistage pump which are complex to construct.Efficiency is high only over a range.( explain graph)Usually not self primingNon return valve is needed in the delivery to avoid back flow.Very viscous fluid can not be handled/Dis-Advantages of centrifugal pumps
14 Types centrifugal pumps Typical classificationSingle stageMultistageExplain why and how
30 Diaphragm Reciprocating pumps Basic principle is similar to a reciprocating plunger pump/Plunger pressurizes the hydraulic oil which when pressurized pushes the diaphragm and discharge starts.Stroke length can be adjusted and hence the dosing flow rate.No direct contact of plunger with the solution.Direct contact is only with diaphragm ( neoprene, Teflon etc)
31 Diaphragm Reciprocating pumps Figure 1: The air valve directs pressurized air to the back side of diaphragm "A". The compressed air is applied directly to the liquid column separated by elastomeric diaphragms.The compressed air moves the diaphragm away from the center block of the pump. The opposite diaphragm is pulled in by the shaft connected to the pressurized diaphragm. Diaphragm "B" is now on its air exhaust stroke; air behind the diaphragm has been forced out to atmosphere through the exhaust port of the pump. The movement of diaphragm "B" toward the center block of the pump creates a vacuum within the chamber "B". Atmospheric pressure forces fluid into the inlet manifold forcing the inlet ball off its seat. Liquid is free to move past the inlet valve ball and fill the liquid chamber.Diaphragm Reciprocating pumps
32 Diaphragm Reciprocating pumps Figure 2: When the pressurized diaphragm, diaphragm"A", reaches the limit of its discharge stroke, the air valve redirects pressurized air to the back side of diaphragm "B". The pressurized air forces diaphragm "B" away from the center block while pulling diaphragm "A" to the center block. Diaphragm "B" forces the inlet valve ball onto its seat due to the hydraulic forces developed. These same hydraulic forces lift the discharge valve ball, forcing fluid flow to flow through the pump discharge. The movement of diaphragm "A" to the center block of the pump creates a vacuum within liquid chamber "A". Atmospheric pressure forces fluid into the inlet manifold of the pump. The inlet valve ball is forced off its seat allowing the fluid being transferred to fill the liquid chamber.Diaphragm Reciprocating pumps
33 Diaphragm Reciprocating pumps Figure 3: Upon completion of the stroke, the air valve again redirects air to the back side of diaphragm "A", and starts diaphragm "B" on its air exhaust stroke. As the pump reaches its original starting point, each diaphragm has gone through one air exhaust or one fluid discharge stroke. This constitutes one complete pumping cycle. The pump may take several cycles to become completely primed depending on the conditions of the application.
34 Gear and screw pumps High pressure and viscous fluids Used in Samd for lube and seal oil pumps air booster of ammonia, 102-J
35 Gear pumps High pressure and viscous fluids Example : lube/ seal oil pumps
36 See the solution is pushed out of the pump physically