CHEM - High Precision Gear Pump For Conveying Low To Medium Viscosity Fluids Brochure

CHEMEXTRUPOLYBOOSTERPUROCHEM High precision gear pump for the chemical industryCHEMCHEM gear pump for conveying and metering of fluids with low to medium viscosity. The application range goes from classic transfer and metering tasks in the chemical and pharmaceutical industries up to the conveyance of monomers, oligomers and prepolymers during the polymerization process.Decades of experience in design and an optimum selection of materials, make this type of pump suitable for even the most demanding tasks and are outstanding in their reliability and metering precision in both vacuum and high pressure ap-plications. Typical areas of application for this type of pump are to be found in the chemical, cosmetic, food, petrochemical and polymer industries. The CHEM series is also suitable for the food industry, e.g. for con-veying butter, margarine or vegetable oils. Pumps of this type can be supplied with or without heating. The WITTE modular construction system for bearings, gears and shaft seals offers a maximum of flexibility for the end customer.Technical FeaturesHousing: Stainless steels, carbon steels, tantalum, titanium, Hastelloy®, ceramicsGears: 1.4112 (440B) but also all other processable ceramics and metals, e.g. 1.4571 (316Ti), Ferralium®, Ferro Titanite®, Hastelloy®, etc., optional: surface coating, spur gearingFriction Bearings: Carbon, NiAg (nickel-silver), silicon carbide (SIC), zirconium oxide, tool steel, Al-bronze, special materials, optional: surface coatingShaft Seals: Internal single mechanical seal (ED), External single mechanical seal with buffer fluid (AD), Double mechanical seal with buffer fluid (DD), Magnetic coupling, stuffing box, viscoseal and combinations Heating Systems: Steam, water, heat transfer oil, electricalOperating ParametersViscosity: 0,0005 to 1.000 Pas Temperature: Up to 300 °C (580 °F), higher temperatures upon requestSuction Pressure: Vacuum to max. 15 bar (218 psig), higher with magnetic driveDifferential Pressure: Up to 120 bar (1.740 psig) The values listed are maximum values and must not coincide under certain circumstances.Pump SizesFrom 22/6 (1,28 cm3/rev) up to 280/280 (12.000 cm3/rev). Sizes with longer gears for all types available e.g. 140/210 (2.223 cm3/rev).Application ExamplesOrganic and Inorganic Chemicals: Alcohols, additives, bases, esters, glycerine, resins, hardeners, isocyanates, monomers, oils, phenol, acids, biodiesel, asphalt, bitumen, tar, hotmelt, glues, waxes, etc.Polymers: Celluloseacetate, Nylon 66®, prepolymers, etc.Foodstuffs: Edible oils, butter, margarine, flavourings, chocolate, fudge, liquorice, chewing gum, vitamins, syrup, gelatine. etc.Pharmaceutical and Cosmetic Products: Amino acids, lotions, shampoo, vitamins etc.Mechanical SealsSuction Pressure:Up to 15 bar (abs) (218 psig)Viscosity:0,5 - 50.000 mPas (cP)Temperature:max. 300 °C (580 °F)Single mechanical seal (ED)Suction Pressure:Vacuum to max. 15 bar (abs) (218 psig)Viscosity:0,5 - 1.000.000 mPas (cP)Temperature:max. 300 °C (580 °F)Double mechanical sealwith buffer fluid (DD)Suction Pressure:Vacuum to max. atmosph. pressure (abs)Viscosity:0,5 - 100.000 mPas (cP)Temperature:max. 200 °C (392 °F)Single mechanical seal with buffer fluid (AD)SealsThe CHEM MAGNET is in general constructed in the same way as the CHEM but it is supplied with a synchronous magnetic coupling as shaft seal. This operates slip-free, i.e. the pump speed is always the same as the drive speed. CHEM MAGNETThe magnetic coupling lends itself to conveying poisonous or flammable substances, as well as for operation at high system pressures. Special versions can be used for inlet pressures of up to 500 bar (7.252 psig). The containment shell of the magnetic coupling can be of the double-walled type. The double wall serves hea-ting the coupling can. The double-walled containment shell can be provided with a leakage-monitoring system for particularly critical processes. The containment shell is filled with inert gas, in order to detect damage. If this gas escapes to the inside or outside, depending upon which wall is damaged, a pressuresensor will trigger an alarm. Because one wall of the double-walled containment shell is still intact, the possibility of the hazardous medium being conveyed leaking into the environment will be eliminated.A particular highlight of the WITTE Magnetic Coupling is the inner magnetic rotor‘s separate bearing. This ensures that only torque is transferred to the pump‘s drive shaft. The relatively heavy weight of the inner rotor is taken up by this bearing, thus relieving the pump‘s bearings.WITTE´s flange bearing design offers the additional advantage of preventing the inner rotor from touching and damaging the containment shell. In competitors design it is possible for the inner rotor to touch the contain-ment shell after pump bearings wear. Our design provides the safety of an additional bearing to insure the inner rotor can not touch the containment shell.Pump SizesFrom 22/6 (1,28 cm3/rev) to 180/180 (3.200 cm3/rev).The values listed are maximum values and must not coincide under certain circumstances.Technical FeaturesHousing: Stainless steel, tantalum, titanium, Hastelloy®, ceramicGears: 1.4112 (440B) but also all other processable ceramics and metals, e.g. 1.4571 (316Ti), Ferralium®, Ferro Titanite®, Hastelloy® etc., optional: surface coating, spur gearingFriction Bearings: Carbon, NiAg (nickel-silver), silicon carbide (SIC), zirconium oxide, tool steel, Al-bronze, special materials , with optional surface coating Heating Systems: Water, heat transfer oilOperating ParametersViscosity: 0,5 to 30.000 mPas (cP)Temperature: Up to 350 °C (662 °F) Suction Pressure: Vacuum to max. 500 bar (7.252 psig)Differential Pressure: Up to 120 bar (1.740 psig) Inner rotorMagnetsFlange bearingVentBearingsDriven shaftDrive shaftContainment shellOuter rotorill. CHEM MAGNETIC COUPLINGMetering SystemThe WITTE metering system (WDS) enables precise volumetric metering of low to high viscosity media with gearpumps, even at high temperatures and pressures. Twoseries connected gear pumps, one measuring and onepressure boosting pump are precisely controlled by a PLCcontrol system, such that a precision of better than 0.1%is achieved, depending upon the medium.Special PumpsIn addition to our standard pumps, we offer a wide range ofspecial pumps, e.g. made of ceramic, tantalum, titanium orimmersion pumps. Many of these pumps are custom built tosuit the application in question and its specific operating parame-ters. WITTE for example produced one such pump, madecompletely of ceramic, for transporting a highly corrosivemedium at temperature 550° C.Metering Systems / Special PumpsSpecial pumps examplesSize A B C D E Ø F Ø G H I J K K1 L L1 M Weight1/1 (22/6) 200 116 112 80 20/15 11 18 40 110 9 83 110 120 147 85 6 Kg1/2 (22/13) 200 116 112 80 20/15 11 18 40 110 9 86.5 113.5 127 154 85 6 Kg1 (22/22) 200 180 112 80 21.3 11 18 40 110 9 91 118 136 163 85 6 Kg2 (28/28) 235 208 138 108 33.7 16 22 40 130 11 109 138 160 189 105 15 Kg3 (36/36) 250 214 152 114 48.3 19 16 60 140 12 124 157 188 221 110 20 Kg4 (45/45) 234 244 176 134 60.3 24 25 75 170 14 148 186 226 265 135.5 26 Kg5 (56/56) 360 264 210 168 60.3 32 27 100 220 20 195.5 239.5 289.5 333.5 160 50 Kg6 (70/70) 350 346 258 208 76.1 38 27 115 250 22 225.5 275.5 338.5 388.5 191 125 Kg7 (90/90) 498 416 300 269 88,9 48 42 130 310 28 265 329 405 469 237 220 Kg8 (110/110) 470 488 380 310 114,3 60 42 180 410 28 319 478 384 543 287 340 Kg9 (140/140) 600 538 454 340 168,3 70 47 230 430 28 410 457 612 669 344 500 Kg10 (180/180) 800 *1 590 440 219,1 *2 65 285 520 33 617 617 902 902 450 700 KgSize Spec. displacement volume (cm3/rev)Capacity (l/h)*1/1 (22/6) 1,28 20 - 2001/2 (22/13) 2,78 40 - 4001 (22/22) 4,7 70 - 7002 (28/28) 10,2 140 - 14003 (36/36) 25,6 280 - 28004 (45/45) 46,3 410 - 41005 (56/56) 92,6 650 - 65006 (70/70) 176 990 - 99007 (90/90) 371 1600 - 162008 (110/110) 716 2500 - 253009 (140/140) 1.342 3800 - 3780010 (180/180) 3.200 6900 - 6910011 (224/224) 6.100 11000 - 10600012 (280/280) 12.000 17000 - 170000CHEM DimensionsCHEM TransferMeteringPressure increaseThin film evaporationOperating ConditionsSize / Displacement Volume / CapacityDL 1L FABE CGKK 1MH JI* (Depending on the fluid characteristics and operating conditions)*1 Upon Request*2 W100 x 2,5 x 38 / DIN 5480Pump SizesWITTE PUMPS & TECHNOLOGY GmbHEsinger Steinweg 44 aD-25436 Uetersen / Hamburg / GermanyT: +49 (0) 4122 / 92 87- 0 F: +49 (0) 4122 / 92 87- 49info@witte-pumps.comwww.witte-pumps.com05/2012 CHEM ENG REV1