ROTAN Gear Pump Brochure_English

GP/HD/PD/CD/EDDESMI ROTAN, one of the world’sleading manufacturers of internal gear pumpsDESMI A/S, formerly known as A/S De Smithske, wasfounded in 1834. Today DESMI A/S develops, manufacturesand markets pumps and pumping systemsworld-wide. The ROTAN pumps are marketed by theDESMI ROTAN division and are distributed by subsidiaries,sales agencies and distributors in more than 40countries.The internal gear pump principle was developed in1915 by a Danish American. In 1921, he licensed aDanish company to manufacture the pumps, whichhave been continuously marketed worldwide underthe ROTAN name. The unique, modular concept ofROTAN pumps is generally recognized as the mostadvanced internal gear pump design available today.Product development with CADMain offices and factory in AalborgPumps are marketed worldwide under the ROTAN name2

The ROTAN internal gear pump provides favourableflow conditions, as the direction of the liquid flow isonly changed slightly through the pump.This means that superior self-priming capability andgentle liquid handling are achieved, and also thathighly viscous liquids may be pumped.Method of operationLiquid inlet Passage of liquid Liquid outletEach pump is tested usingmodern facilitiesISO 9001 certificateManufacturing with state-of-the-art CNC equipmentRotan pumps offer the following additionaladvantages:- Pumping in either direction- Easy maintenance and inspection based on themodular design- Sturdy and uncomplicated construction withonly two rotating parts and one shaft seal- Large choice of configurations available asstandard- Genuine back pull-out designEvery ROTAN pump is hydrostatically andperformance tested and receives its own certificatebefore leaving the factory.It is DESMI ROTAN’s policy to offer solutionstailored to our customers' needs and to follow-up byfirst-class after-sales service.3

GPGeneral Purpose pumps in cast iron,for clean, non-abrasive liquidsGP monobloc pumps aretypically used for handling clean oils.The simple and compact construction makes it alow-cost pump, often used in modified versions byOEM customers.A close-coupled OEM model is also available(see picture below).GP pumps are designed for use with IEC flangemotors.Capacity range: Up to 50 m 3 /hSpeed:Up to 1,750 rpmDifferential pressure: Up to 16 barSuction lift:Up to 0.5 bar vacuumwhile primingUp to 0.8 bar vacuumwhile pumpingViscosity range:Up to 7,500 cStTemperature:Up to 150˚C4

PDPetrochemical Duty pumps in carbon steel, designedfor refinery and petrochemical applicationsPD pumps are designed for refinery andpetrochemical applications, all pressure containingcomponents are carbon steel.Typical applications include pumping of fuel, oil,gasoline, lube oil, grease, and other hydrocarbonbasedfluids. PD pumps are available to meetAPI 676 standards with exceptions.Capacity range: Up to 170 m 3 /hSpeed:Up to 1,750 rpmDifferential pressure : Up to 16 barSuction lift:Up to 0.5 bar vacuumwhile primingUp to 0.8 bar vacuumwhile pumpingViscosity range:Up to 250,000 cStTemperature:Up to 250˚C6

CDChemical Duty pumps in stainless steel,designed to handle corrosive liquidsCD pumps are designed for handlingcorrosive liquids, primarily found in the chemicalprocessing, food and pharmaceutical industries.Typical applications include pumping of organicacid, fatty acid, alkali, caustic soda, polymersolutions, soap, shampoo, animal fat, vegetable fat,chocolate, and other special fluids.Capacity range: Up to 170 m 3 /hSpeed:Up to 1,750 rpmDifferential pressure: Up to 16 barSuction lift:Up to 0.5 bar vacuumwhile primingUp to 0.8 bar vacuumwhile pumpingViscosity range:Up to 250,000 cStTemperature: Up to 250°C7

EDEnvironmental Duty pumps, magnetically coupled pumpsfor ultimate protection against leakageED pumps are designed for applications where noleakage, liquid or gaseous, is allowed.Earlier the fields of application for the ED pumpwere typically isocyanate, solvents and other hazardousorganic liquids.Nowadays ED pumps are increasingly used for nothazardous liquids as well, since leakage/pollutionbecomes more and more unacceptable.As only minimal maintenance is necessary, ED pumpswill be a very economical solution compared to traditionalpumps where frequent shaft seal replacementsare required.Construction materials: Cast iron, carbon steelor stainless steelCapacity: Up to 90 m 3 /hSpeed:Up to 1,750 rpmDifferential pressure:Suction lift:Viscosity:Temperature:Up to 16 barUp to 0.5 bar vacuumwhile primingUp to 0.8 bar vacuumwhile pumpingUp to 10,000 cStUp to 250˚C8

Most important features and benefits- Maximum protection against leakage- Patented cooling system, based on an integralpump, eliminating the need for external cooling(see picture below)- Dynamic axial balancing system, minimizingaxial loads, saving energy and increasing life(see picture below)- Increased safety, provided by a completelyenclosed magnetic coupling housing- Optimal for outdoor installation, the completelyenclosed magnetic coupling housing protects theexternal magnets from contact with moisture andforeign matters.Suction(Discharge)- Large choice of slide bearing materials availableas standard, e.g. cast iron, bronze, carbon and,tungsten carbide- Standard magnet material is neodymium-iron-boron.Optional samarium cobalt permanent magnetspermit operating temperatures up to 250°C- Pumping in either direction- External heating jackets for both front cover andmagnetic coupling housing available as standardoptional features- Genuine back-pullout design- Standard as close-coupled, optional with bareshaft end- Both internal and external canister protectionDischarge(Suction)ROTAN ED SERIES PUMPThe most advanced, magnetically driven, positivedisplacement pump available9

By indicating the optionsin the order below, the completepump can be identified1) Pump seriesGPHDPDCDEDGeneral Purpose, monobloc pump in cast ironHeavy Duty pump in cast ironPetrochemical Duty pump in carbon steelChemical Duty pump in stainless steelEnvironmental Duty pump, magnetically coupled,cast iron, carbon steel or stainless steel2) Pump sizes26 DN 25 – 1”33 DN 32 – 1 1 /4”41 DN 40 – 1 1 /2”51 DN 50 – 2”66 DN 65 – 2 1 /2”81 DN 80 – 3”101 DN100 – 4”126 DN125 – 5”151 DN150 – 6”152 DN150 – 6” *201 DN200– 8” ** Under developmentAvailable with flanges** or female connections, dependent onsize and material. GP pumps are available up to and includingsize 101, PD is not available in size 152. ED pumps are available upto size 151.** Flange connections according to:ISO 2084 DIN 2501 BS 4504 1969 ANSI B 16.1/B 16.53) ConfigurationsE Suction/discharge connections in-lineB Suction/discharge connections at 90° angle (not standard)Additional options, see page 12.4) – Hyphen5) Material codes for main partsCode Type Casing/Covers Rotor/Idler Shaft1 GP/HD GG-25 GG-25 St.60.23 CD G-X 6 CrNiMo 18 10 X 8 CrNiMo 27 5 X 8 CrNiMo 27 54 PD GS-52.3 GG-25 St.60.2For ED pumps, all material codes may be used.6) LubricationU Idler bearing and main bearing lubricated by pump mediumM Externally lubricated idler bearing and main bearing7) Material codes for idler bearingCode Idler Bush Idler Pin: GP-HD-PD Idler Pin: CD1 Cast iron Hardened 16 MnCr 5 X 8 CrNiMo 27 52 Bronze Hardened 16 MnCr 5 X 8 CrNiMo 27 53 Carbon Hardened 16 MnCr 5 X 8 CrNiMo 27 54 Al.oxide Coated 16 MnCr 5 CoatedX 8 CrNiMo 27 55 Carbon Al.oxide, polished Al.oxide, polished8 Tungsten carbide Tungsten carbide Tungsten carbide8) Material codes for main bearingCode Bearing Bush Shaft: GP - HD - PD Shaft: CD1 Cast iron St.60.2 X 8 CrNiMo 27 52 Bronze St.60.2 X 8 CrNiMo 27 53 Carbon St.60.2 X 8 CrNiMo 27 54 Al.oxide Coated St.60.2 CoatedX 8 CrNiMo 27 58 Tungsten carbide Coated St.60.2 CoatedX 8 CrNiMo 27 5B Ball bearing St.60.2 Not applicable9) Shaft sealsB Teflon-impregnated, non-asbestos packing2 Single mechanical shaft seal, DIN 24960 - KU,bellows type or O-ring type22 Double mechanical shaft seal,DIN 24960 - KU, O-ring typeFor ED pumps only/xx Magnet length: xx cmN Magnet material: Neodymium-iron-boronC Magnet material: Samarium cobalt10) Special configurationsS All special configurations are marked with: S10

Item references and descriptionsA Pump casingS Blind coverAC Idler pinAA Front coverAB IdlerAD Idler bushBU RotorBA Rear coverBP Shaft seal housingCJ Shaft sealBC Main bearing bushCY FlangeCQ Bearing bracketBN Shaft seal housingCS Bearing coverBV ShaftCR Bearing coverCU Ball bearing11

ConfigurationsSealing with stuffing box, with or without lanternring, for use of external lubrication. Used for highviscosities and where some leakage is allowed.M - GP/HDSealing with single mechanical shaft seal, DIN 24960- KU, combined with a ball bearing as main bearing.Used where only minor leakage is allowed.M - PD/CDSealing with single mechanical shaft seal, DIN24960 - KU, combined with a product lubricatedsleeve bearing as the main bearing. Used whereonly minor leakage is allowed.MM (tandem) - MMP (back-to-back)Double mechanical shaft seals, DIN 24960 - KU, intandem or back-to-back, with main bearing in thebarrier fluid. Used where no leakage is allowed. Upto 6 bar differential pressure.MMW (tandem) - MMPW (back-to-back)Double mechanical shaft seals, DIN 24960 - KU, intandem or back-to-back, with product lubricatedmain bearing. Used where no leakage is allowed.Up to 16 bars differential pressure.TSpecial clearances. Increase of tolerances used forliquids with a viscosity above 7,500 cSt. or atemperature above 150˚C.DHeating jacket on the front cover, often requiredprior to start-up when pumping high viscosityliquids and liquids which tend to solidify.KHeating jacket on the rear cover, often required priorto start-up when pumping high viscosityliquids and liquids which tend to solidify. Thisjacket is also used as a seal cooling jacket.CHDCombination of special clearances and heatingjackets together with external lubrication of themain bearing, used in the chocolate industry.RSafety valve, single acting (one direction), used toprotect the pump and the complete installationagainst excess pressures.Special configurationsExample: Customer specified or providedcartridge seal or component.LubricationIdler and main bearing externally lubricated. Usedwhen pumping non-lubricating or very viscousfluids.12

Selection of pump sizeVISCOSITY (cSt)20115215112610181665150,000 25,000 3,000 400 & below75,000 40,000 7,500 1,00041332640 60 80 100 150 200 300 400 600 800 1,000 1,5001750SPEED (rpm)1501009080706050403020109876543210.90.80.70.60.50.40.30.20.1CAPACITY (m 3 /h)To select the pump size with this table, youonly need to know:– Capacity– ViscosityStart at the top of the table with theviscosity, and draw a line down, stayingwithin the colour of the selected viscosityrange (see example).Start at the right of the table, draw a horizontalline starting with the required capacity (seeexample).The point where these two lines meetdetermines the pump size, defined by the diagonallines in the table. If you do not hit oneof these pump lines exactly, increase ordecrease the capacity a bit. The speed isfound vertically below the point of intersection(see example).The maximum speed of each pump is foundvertically below the end of each pump line(indicated with the small black dot). Thismaximum speed must be reduced to max.50% when pumping strongly abrasive liquidsor emulsions. When the differential pressureis known, the shaft power is calculated asfollows:E(kW) = 0.07 x flow (m 3 /h) x differentialpressure (bar)The requested shaft power has to beincreased by up to 35% when using a smallROTAN pump in combination with highviscosity. (More than 10,000 cSt).The requested shaft power has to bedecreased by up to 35% when using a bigROTAN pump in combination with low viscosity.(Less than 500 cSt).

THE DESMI GROUPDESMI A/STagholm 1, Postboks 226DK-9400 NørresundbyTel.: +45 96 32 81 11Fax.: +45 96 32 81 49Internet: www.desmi.comE-mail: rotan@desmi.comPrinfo Aalborg - Handelstrykkeriet - 05/2003