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Industrial Centrifugal Fans
Venti Oelde industrial fans areused to handle air, gas andvapours, with or without solids.They are durable, quiet andeasy to maintain. They are inuse in a wide variety of formsin almost all key industries.
Industrial centrifugal fans, recognizably Venti
Venti Oelde designs and con-structs each centrifugal fan onthe basis of the specific pro- c ess parameters. The seriesHRV, DHRV, ZHRV and HVencompass volume flows fromsmaller than 5,000 to above3,000,000 m³/h. The totalpressure differences rangefrom 1,500 to 65,000 Pa. A fan with optimum efficiencycan, therefore, be found forany required operating point.
The operating data determinewhether we build our centrifu-gal fans as single inlet, dou-ble inlet or multi-stage fans.Operating temperaturesextend to 500 °C and higher.Impellers are overhung ormounted between bearings.The centrifugal fans are withdirect drive, through couplingor with v-belt drive.
Tota
l pre
ssu
re d
iffe
ren
ce �
pt[P
a]
at a
den
sity
of
1.20
5 kg
/m³
HV
ZHRV
60,000
40,000
20,000
10,000
10,000 100,000 1,000,000 2,000,000 3,000,000
HRV/DHRV
Volume flow V̇ [m³/h]
23
Venti Oeldeʼs services start atthe first contact and continuethrough to the provision of sup-port during regular operation.From project work to assembly,including along the way theplanning phase and engineer-ing, a personal contact willalways be available.
Even after delivery andassembly, Venti Oelde explicit-ly remains a partner for all cus-tomers. Venti Oelde specialistsare there personally for all rele- vant work – during assemblyand commissioning as well formaintenance and servicing. Inaddition customers can call us24/7 on our service hotlineunder +49 (0) 171-195 57 50.
Arrangements
Double inlet centrifugal fan
Shown with raised concrete foundation
Arrangement M
Direct drive –impeller on motor shaft,
shown with baseframe
Arrangement K
Drive through coupling, shown with baseframe
45
Single inlet centrifugal fan
Shown with raised concrete foundation
Arrangement RG
V-belt drive, shown with baseframe
Arrangement R
V-belt drive
Arrangement ZHRVM
Two-stage centrifugal fan,shown with baseframe
270°
180°
90°
360°
315°
225° 135°
45
°
255°
285° 75°
105°
30°15
°345°330°
300°
240°
210°
165°
150°
120°
60°
195°
Casing
Inlet box
clockwise
Overhung impeller and appropriate inlet configuration
Depending on the operatingdata, our centrifugal fans aredesigned to be either single ordouble inlet, i.e. single-width ordouble-width. On the basis ofthe geometry, masses, speedand the expected load on therotor, we determine, togetherwith the customer, whether theimpeller is to be overhung or
mounted between bearings.With double inlet centrifugalfans, the medium handledenters via inlet boxes that areflange-mounted to the fan inletside or are directly welded tothe volute casing.
Versatile in design and set-up
Single inlet and double inlet impeller
AA
A A
90°
180°
270°
360°
45°
135° 225°
315°
105°
75° 285°
255°
330°34
5°15°30°
60°
120°
150°
195°
210°
240°
300°
165°
Possible discharge and inlet box positions clockwise
Possible outlet and inlet box positions anti-clockwise
Casing
Inlet box
anti-clockwiseOutlet spigot
Outlet spigot
View A from the drive side towards casing
View A from the drive side towards casing
Mounting industrial fans on aconcrete foundation ensureshigh torsional stiffness andnegates the need for a weldedmotor pedestal. Recessedfoundations or raised concretefoundations are suitable.Anchoring the fan directly tothe raised concrete foundationis preferable to the steel con-struction particularly if, as aresult of the operational condi-tions, rotor unbalance is to beexpected. If required, we canalmost completely eliminatedynamic interaction betweenfan and base by fitting vibra-tion dampers between them.
The inlet side of a fan withoverhung rotor is configuredwith a flange-mounted duct ora shaped inlet, possibly includ-ing an interposed damper.
Air flows to rotors mountedbetween bearings throughinlet boxes. The dampers arearranged as multi-bladed lou-ver dampers in front of theinlet boxes or inlet vane con-trols downstream of the inletboxes.
Impeller mounted between bearings and appropriate inlet configuration
Impeller mounted between bearings and appropriate inlet configuration
Mounting on raised concrete foundation using a baseframe
Direct mounting on raised concrete foundation without baseframe
Direct mounting on vibration-reducing concrete foundation without baseframe
67
Logarithmically backward inclined blades
Backward curved blades
Impeller geometry and blade shape for every application
Aerofoil blades
Forward inclined blades
Straight, radial-tipped blades
89
Designs and special solutions which count
Shaft with journal bearingseat and pre-mountedshaft seal, coupling withaxial backlash limitation
Bearing housing of a self-aligning roller bearing with
cooling impeller and pre-mounted shaft seal
Disc brake
Drum brake
We also use external oil sup-ply systems for the lubricationof bearings and drives; ifrequired, in compliance withAPI Standard 614.
Rotor turning gear units areused to slowly rotate the fanwhen maintenance work isdue or to permit the fan toslowly and uniformly cooldown when the main drivehas been switched off. Thechosen rotating speed is nor-mally very low, but sufficientto maintain lubrication of thefan bearings.
We fit our fans with bearingssupplied by reputable manu-facturers. When hot gases are being handled, coolingimpellers between the casingand bearing ensure the re-moval of residual and creepingheat. In critical cases, oil-cir -culating lubrication providesadditional bearing cooling.
1011
Drum and disc brakes serve toshorten the run-down timewhen the fan has beenswitched off and to retain thefan when it is at a standstill.
Venti Oelde also designs theshaft seals individually accord-ing to the specific plant operat-ing conditions; if required,multi-chamber labyrinth sealswith sealing gas connectionare used. Sealing the shaftpassage through the casingprevents dust or toxic gasesescaping or ambient air con-taminating the medium han-dled.
Venti Oelde combats wearcaused by friction and impactto impellers and inside casingwalls with a variety of mea s-ures. Effective protective pro-cedures are decided duringthe fan planning phase withthe goal of prolonging servicelife by using suitable materi-als, high-precision machiningand optimum blade geometry.
Designs and special solutions which count
1213
Stiffening cone Impeller
Impeller backplate
Impeller hub
ShaftConnection shaft to hub = conical
Fan casing
Insulating collar
Novapress seal
Cooling disc
Bearings
Disc seal
Clamp bracket
Spacer rings made from aluminium or steel
Seal discs made from flexiblegraphite composite rings
Value-added accessories
If specified, we can almostcompletely eliminate dynamicinteraction between fan andbase by fitting vibrationdampers between them.Vibration dampers, togetherwith flexible joints, ensuredecoupling between the fanand connected systems.
Finally, Venti Oeldeʼs electron-ic monitoring systems reliablyprovide cost-effective preven-tive maintenance and service.Vibration monitors control theoscillation amplitude and giveearly warning of any dreadedmaterial caking in the fan. Ourdynamic balancing systemsreduce any imbalance andvibrations by mass balancing.
Variable speed motors, louverdampers or inlet vane controlsserve to adapt the gas volumeflow to the needs of the con-nected system.
1415
Side wall of noise reduction enclosureSupply air through silencer,simultaneously used to cool the motor
Silencer integrated in the booth
Vibration damper
Baseframe
Shaped inlet with guard
Venti Oelde offers made-to-measure noise protection: All major components of ourfans are acoustically opti-mized by our own technicaldesigns. Individual noisecontrol measures simultane-ously provide insulationagainst heat loss. VentiOelde thus offers particularlybudget-friendly solutions.
Additional measures can betaken, such as the insulationand decoupling of structure-borne noise from foundationsand connections. Carriers ofemissions to the outside, likefresh air intake ducting andstacks can be insulated, forexample, by means ofsilencers. Of course, fansand drive units can also becompletely enclosed.
Flexible joints decouple thefans from the ducting system.A suitable fabric for the flexi-ble joints is selected to fulfildemands made by the me-dium handled. The chosenfabric is usually neoprene, sili-cone-glass or PVC-polyester.Steel flexible joints haveproved particularly successfulwith difficult media.
Inlet measuring nozzle
Upright splitter silencer with blank
Inlet flexible joint
My request for quote from Venti Oelde
Company
Street
Post Code/Town/Country
Contact
Phone/Email
General informationSite
Altitude above sea level m Air pressure Pa
Ambient temperature max. °C min. °C
Service voltage V Frequency Hz
Design dataApplication
Volume flow Am³/h
Operating temperature °C max. temperature °C
Pressure difference � static � total
Pa Pa inlet
Medium handled
Density kg/Nm³/h
Dust content mg/Am³ Type of dust
Noise specifications Sound pressure level Lp (A) dB (A) at a distance of 1m or
Sound power level Lw (A) dB (A)
Other
Arrangement � Single inlet � Double inlet� Steel pedestal � Baseframe� Bearing pedestals on � Bearing pedestals and motor
raised concrete base soleplate on raised concrete base
Other
Scope of supply � Control element � Flexible joints� Vibration dampers � Vibration monitoring� Motor� Silencer � Noise insulation
Other
Additional information
By fax, smartphone or PC
Please complete the questionnaire, tear out along the perforation and send it to us at:
00 49 (0)25 22-75 523.
We shall answer promptly.
Scan the QR Code* with your smartphone or tablet and you will be directed to our online questionnaire.
*QR Code scanner app is required.
The questionnaire is also available to complete online at:
www.venti-oelde.com/ICF_Questionnaire
Ventilatorenfabrik Oelde GmbHP.O. Box 37 09D-59286 OeldePhone: +49 25 22 75 - 0Fax: +49 25 22 75 - 2 [email protected]
Exhaust air treatment plants
Dust collection and process air cleaning plants
Ventilating, heating and air conditioning plants
Industrial fans
Surface technology
Recycling and waste processing plants
Sub
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to a
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15/7
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