Jan 20, 2018 in this video, we will describe the different types of positive displacement rotary pumps. The nearly vertical pressure stiff performance curve of rotary positive displacement pd pumps stems from a basic principle. Since rotary positive displacement pumps usually have large. Positive displacement pump is a type of pump used to displace or force oil and petroleum products into pipelines or into various equipment installed in refineries. Generally, we express density in units of pounds per cubic inch. A cfd study on the mechanisms which cause cavitation in positive displacement reciprocating pumps 50 fig. The volume of liquid moved by the pump in one cycle one suction stroke and one discharge stroke is equal to the change in the. General a displacement pump also called positivedisplacement,or just pdisa. These pumps generally tend to be larger than equal. Because fluid properties affect positive displacement pumps differently than centrifugal pumps, its critical to understand the interaction between the pump and the fluid and how the operation of positive. Processflo offers a variety of positive displacement pumps, including air operated diaphragm aodd, rotary lobe, progressive cavity, internal and external gear, diaphragm, metering, sliding vane, and.
Viking pump rotary positive displacement pumps hayes. Pdf positive displacement pumps are critical to applications ranging from drug. Both viking pump and hayes pump s engineering expertise in rotary positive displacement gear pump solutions is unparalleled in the industry. Hayes pump distributes viking pumps broad line of products from industrial pumps, to parts and accessories, including strainers, reducers, units, and maintenance kits. Figure 1 by definition, pd pumps displace a known quantity of liquid with each revolution of the pumping elements i. As a volumetric fluid handling technology, rotary pd pumps create flow and are. Universal ii series pd pumps for more than half a century, waukesha cherryburrell has been a leader in the design, manufacturing and application of external circumferential, piston ecp style, rotary positive displacement pumps. However, a slight increase in internal leakage as the pressure.
Lobe pump, rotary lobe pump, positive displacement pump. Waukesha cherryburrell pd pumps are in service around the world in food, dairy, canning, bakery, beverage and pharmaceutical processing, as well as difficult chemical and industrial applications. Rotarypiston, or oscillating piston, positive displacement machines for. These generally produce a continuous, or sometimes a slightly pulsed, water output. Positive displacement pump products for processing operations exceptionally manufactured positive displacement pump products are a necessary part of many different processing operations, particularly when it comes to moving highly pressurized, viscous fluids. Pumps are the important equipment in chemical process industries. This online test module on pumps will help you to enrich your knowledge about selection, application and operating knowledge on pumps. Positive displacement pumps, unlike centrifugal or rotodynamic pumps, theoretically can produce the same flow at a given speed rpm no matter what the discharge pressure. A plunger pump is a type of positive displacement pump where the high pressure seal is stationary and a smooth cylindrical plunger slides through the seal. The volume is a constant given each cycle of operation. The operation of this type of pump is holding a fixed volume of fluid that needs to be displaced and then forcing it from the inlet section into the discharge pipe. Series rotary lobe pumps options to ensure the best performance for your specific application. Users of waukesha pds benefit from decades of continuing product improvement. Durrex pumps is a professional lobe pumps manufacturer, the main products are lobe pump, lobe pumps, rotor pump, rotary lobe pump, rotary lobe pumps, positive displacement pump and so.
Positive displacement pumps is a current reference guide for positive displacement pumps for both traditional and stateoftheart testing methods, and serves as a bridge between textbooks and manufacturers literature by providing equipment testing practices based on technical knowhow, practical experience, and academic theory. Rotary positive displacement pumps fall into 5 main types. In positive displacement pumps the energy is transferred to the fluid. If youve been charged with selecting a positive displacement pump for your process, you might be.
Positive displacement pumps are another category of pumps. Installation, service and maintenance instructions hlr rotary lobe pump. Hayes pump is a factorytrained, stocking distributor for viking pump and provides local support and inventory on positive displacement pumps. Viking pump rotary positive displacement pumps hayes pump. Henshaw, reciprocating pumps, van nostrand reinhold, 1987. Gear pumps a simple type of rotary pump where the liquid is pushed between two gears. This highly robust pump can run at pressures of up to 500 psi. They deliver a nearly constant volume of liquid over a range of discharge pressures. Centrifugal and positive displacement pumps are widely used in chemical industry for variety of application. The vacuum created by the rotation of the pump captures and draws in the liquid. A practical difference between dynamic and positive displacement pumps is how they operate under closed valve conditions. Rotary positive displacement pumps pump engineering.
Pdf modeling a variable speed drive for positive displacement pump. Available in medium duty, heavy duty and extreme duty models in cast iron, cast steel and stainless steel. Positive displacement pumps reciprocating, api standard 674, american petroleum institute. Cleaninplace cip capable with optional flat body profile and free draining vertical ports.
Dec 07, 20 positive displacement pumps principle of operation. Fluid enters from the suction nozzle of the pump and begins filling the lobe cavities. They share many similarities but the pumps are fundamentally different in design. Positive displacement pd pumps dont develop head like centrifugal pumps. Any rotary non positive displacement which does not have radial, axial or helico centrifugal flow, pumps adapted for conveying or for handling specific elastic fluid, and pumps with circumferential or. If youre seeking these pumps and other processing equipment, you can turn to the experts at arroyo process equipment, inc. Positive displacement rotary pumps are pumps that move fluid using the. The flow rate of a pd pump, unlike a centrifugal pump, increases as the fluid viscosity increases. Positive displacement pump products for processing operations exceptionally manufactured positive displacement pump products are a necessary part of many different processing operations. Much of the text and some of the illustrations are from the authors book. Positivedisplacement pumps are another category of pumps.
Based on their mechanics, the liquid flow through centrifugal pumps can vary based on the pressure coming into the pump. Centrifugal and positive displacement pumps course no. How a positive pump operates positive displacement pump operation assuming sufficient nipr positive displacement pumps use two opposing, rotating elements rotors to displace product from the suction side of the pump to the discharge side of the pump. Both viking pump and hayes pumps engineering expertise in rotary positive displacement gear pump solutions is unparalleled in the industry. Other rotary non positive displacement pumps pumping installations or systems f04d2500 definition statement this subclassgroup covers. The hlr rotary lobe pumps by inoxpa are part of our wide range of positive displacement rotary lobe pumps for viscous liquids. Pump school currently focuses on rotary pumping principles. The high water pressure needed to clean heavy manufacturing. Rotary positive displacement pumps universal lobe series. Waukesha cherryburrell pd pumps are in service around the world in food, dairy, canning, bakery, beverage and pharmaceutical processing, as well as. Users of waukesha cherryburrell pd pumps benefit from decades of continuing product improvement. Positive displacement pumps selection guide engineering360.
This subclass covers nonpositivedisplacement pumps for liquids, for elastic fluids, or for liquids and elastic fluids whether rotary or. Decomposition pattern of fluid volumes, the arrows indicate the direction of creation of new mesh layers when the plunger is moving backwards induction and the valve is lifting up. Pumping liquids, or liquids and elastic fluids, by rotary pumps. Definitions and terms density density is the mass of a substance per unit volume. Positive displacement pumps can be of reciprocating and. Waukesha pd pumps are in service around the world in food, dairy, canning, bakery, beverage and pharmaceutical processing, as well as challenging chemical and industrial applications. This type of pump is often used to transfer municipal and industrial sewage. Decomposition pattern of fluid volumes, the arrows indicate the direction of. Positive displacement pumps physically displace fluid, so closing a valve.
This pump handbook has been produced to support pump users at all phd thesis in botany pdf levels. These pumps are able to handle viscous fluids, which flow at lower speeds and create more resistance, more efficiently than kinetic dynamic pumps. A positive displacement pump has an expanding cavity on the. One of the best uses for positive displacement pumps is in industrial pressure washing. The waukesha universal 2 series positive displacement pumps include advanced sanitation technologies, long life features and installation flexibility. Waukesha cherryburrell pd pumps are in service around the world in food, dairy, canning, bakery, beverage. Nov 22, 2016 pumps are the important equipment in chemical process industries. The drive train comprises a internal combustion engine to generate rotary power, a gearbox transmission to enable. Lobepro pumps provides a smooth, steady pumping action which delivers significantly less pulsation than other positive displacement pumps, also avoiding the shearing of sensitive fluids and emulsification of hydrocarbons. Types of positive displacement pumps are reciprocating, metering, and rotary pumps. Thus, positive displacement pumps are constant flow machines. In this video, we will describe the different types of positive displacement rotary pumps.
As a volumetric fluid handling technology, rotary pd pumps create flow and are insensitive to system pressure changes. This makes them different from piston pumps and allows them to be used at higher pressures. Users of wauesha pds beneflt from decades of continuing product improvement. Nonpositive displacement pumps definition statement. Gear, lobe, vane, peristaltic, screw, progressive cavity and after we finish the. The volume of liquid moved by the pump in one cycle one suction stroke and one discharge stroke is equal to the change in the liquid volume of the cylinder as the piston moves from its farthest left position to its farthest right position. Fluid characteristics play a major role with positive displacement pumps because most handle fluids other than water. State the basic principles of positive displacement pumps. The gormanrupp g series line of positive displacement rotary gear pumps is designed to provide performance no other gear pumps can match. Pdf design of three screw positive displacement rotary pumps.
Fristam positive displacement pumps the fkl and fl ii are the two positive displacement pumps discussed in the manual. In either case liquid is displaced from the low pressure suction side to the high pressure discharge side. This pump handbook has been produced to support pump users at all phd. As the rotors rotate, the chamber formed between the rotors, housing and. Mechanism of a scroll pump positive displacement rotary pumps are pumps that move fluid using the principles of rotation. Rotary pump family tree positive displacement pd pumps are divided into two broad classifications, reciprocating and rotary figure 1.
As a general rule, all pumps are designed to move fluid substances from one point to another by pulling, pushing or throwing or by. This sanitary lobe pump is perfect for managing all kinds of fluid, of either low or high viscosity, as well as for filtering and bottling applications. Available in medium duty, heavy duty and extreme duty. In patent documents the following expressionswords helico centrifugal flow.
Pump design 1classification of water pumps water pumps can be divided into three types. A positive displacement pump in which rotary motion carries the liquid from the pumps inlet to its outlet. Pd pump performance is not dependent on specific gravity, unlike centrifugal pumps. G series pumps are versatile enough to handle virtually any pumping application and liquid type. Rotary positive displacement pumps williams carver. Non positive displacement pumps for liquids, for elastic fluids, or for liquids and elastic. Positive displacement pumps can be of reciprocating and rotary type. Listed below are 12 reasons why the hydraulic institute suggests using positive displacement pumps pd pumps. A positive displacement pump operating against closed discharge valves continues to produce flow until the pressure in the discharge line is increased until the line bursts or the pump is. Available in mediumduty, heavyduty and extremeduty models in cast iron, cast steel and. The fkl is a circumferential piston pump, meaning that its rotors run in a channel described by the pump housing and builtin internal hubs. Positive displacement rotary gear pumps fischer process.
Steady advances in design, metallurgy and fabrication techniques. Waukesha cherryburrell pd pumps are in service around the world in food, dairy, canning, bakery, beverage and pharmaceutical processing, as well as challenging chemical and industrial applications. A positive displacement pump must never operate against closed valves on the discharge side of the pump it has no shutoff head like centrifugal pumps. Scopus find, read and cite all the research you need on researchgate. Rotary pumps are very efficient because they naturally remove air from the lines, eliminating the need to bleed the air from the lines manually. Positive displacement pumps are a category of pumps designed to move fluid at a steady rate through a system. Positive displacement pumps principle of operation. Our relationships with worldclass manufacturers allow us to provide the highestrated positive displacement pumps available. Positivedisplacement pumps operate by forcing a fixed. Positive displacement pumps operate by forcing a fixed volume of fluid from the inlet pressure section of the pump into the discharge zone of the pump. The slr pump is a positive displacement rotary lobe pump with sanitary design suitable for use in the dairy, foodprocessing, beverage, cosmetics, pharmaceutical and fine chemicals industries. Products containing fragile solids such as curd can be pumped without damage thanks to the specially designed lobes. Positive displacement rotary pumps can be grouped into three main types.
597 1368 1136 392 905 1219 1152 132 744 1320 499 58 537 1216 67 368 1497 804 1044 725 145 659 1043 1249 1258 958 494 1345 991 1410 1112 18 1289