Volute Centrifugal Pumps PN 16 / PN 25 for Heat …

1 1 Volute Centrifugal Pumps PN 16 / PN 25for Heat Transfer Media Thermal Oil up to 350 CHot Water up to 204 CSeries NTWH/CTWH process modelSeries NBWH/CBWH block modelSeries NIWH/CIWHin-line model <SeriesAll series may be used with organic and synthetic thermal oils at tem-peratures up to 660 F (350 C).The series NTWH, NBWH and NIWH (PN 16) can be used with hotwater at temperatures up to 360 F (183 C).The series CTWH, CBWHand CIWH (PN 25) at temperatures up to 400 F (204 C).The application limits are specified in the table "Application Limits"andin the diagram "Pressure/Temperature Limits (Diagram on page 2).

2 DesignSeries NTWH/CTWH:Horizontally foot mounted end suction casing with top dischargeport mounted on centerline, including single end suction impeller,steel shaft with product lubricated carbon sleeve inboard bearing,single unbalanced mechanical seal and prelubricated non wash-able grease outboard Carbide inboard sleevebearings with balance mechanical seals are available for hot NBWH and CBWH:Foot mounted "block"style pump identical to above except lessoutboard bearing and with a flange mounted motorstub shaft is inserted into the pump coupling and the motorinboard bearing is grease prelubricated and acting as the pumpthrust bearing as and vertically upward NIWH and CIWH.

3 Inline mounted pipe or pedestal supported with a side suction /side discharge inline ports, otherwise identical to the block stylepump vertically upward mounting sealUncooled, balanced or unbalanced, maintenance-free mechanicalseals DIN 24 safety gland and a subsequent throttle/cooling section are providedupstream of the shaft = + 400 Fp = 22 bart = + 360 Ft = -30 Cup to + 350 Cp = 12 barVM 854 NTWH/CTWHS eries NBWH/CBWHS eries NIWH/CIWHP erformance data at 60 Hzp = 16 barp = 25 bar= 16= 25VM 854 3/4/03 10:22 AM Page 2Q [GPM] H [A]2VM 854 and lubricationNTWH/CTWHPump side:Sleeve bearing, lubricated by pumped mediumDrive side.

4 deep groove ball bearing, grease-lubricatedNBWH/CBWH/NIWH/CIWHPump side:Sleeve bearing, lubricated by pumped fluidDrive side: deep groove ball bearing of drive motor,grease-lubricatedConnectionsThe following connections are always provided:FD1 DrainingFD2 DrainingFF2 / FV1 Filling / BleedingFF4 / FV4 Filling / Bleeding(only for vertical block and in-line installation)LO1 Leakage outlet** According toDIN 4754 for non-hazardous draining of heat transfer mediumleaking from the shaft combinationsThe tables on page 5 and 6 shows the possible combinations of com-ponents for the ALLHEAT to the modular design, spare parts management is of drive unit NBWH/CBWH/NIWH/CIWHD uring dismantling of the drive unit, the Volute casing can remain inthe pipeline.

5 In case of changing temperatures of the pumped medium In case of changing ambient temperatures or ventilation In case of plants that are sensitive to vibration Series CTWH 150-400/11, 150-500/11 and 200-500/11 in material 32 - 200 / 01 /180 W128 - 38 / 300 SeriesSizeNominal width of discharge nozzleNominal diameter of diameter of impellerShaft sealBearing typeMaterial typeBore diameter of plug-in shaft forattachment to end of motor shaftExternal diameter of motor stool size of electric motor For series CIWH ACTUAL width of discharge nozzleThe abbreviation is displayed on the for seriesNBWH / NIWHCBWH / CIWH DENOMINATIONV olute casing ImpellerCasing coverShaftPlug-in-shaftBearing

6 BracketMotor stool Intermediate ring Bearing sleeve-S1 Bearing bush-S1 Bearing / typeW110 Materials(Specifications are nearest to the actual standard shown)EN-GJS-400-15(GGG-40)EN-GJS-400-18 LT( )>22212[ F]392572662752[ C ] and temperature limits depending on housing materialsEN-GJL-200 (GG-20)EN-GJS-400-18LT ( ) / ( )EN-GJL-250 (GG-25)EN-GJS-400-15(GGG-40)EN-GJS-400-1 8LT( )Removal of Back Pull-Out unit NTWH/CTWHW here a spacer coupling is used, the back pull-out unit can beremoved towards the motor side, whilst the Volute casing and themotor may remain on the base plate and the pipes connected to thevolute coupling and contact protectionElastic shaft coupling acc.

7 To DIN 740 with or without spacer coupling guard is supplied as a contact protection acc. to DIN EN294 (DIN 31001), where the scope of delivery includes a pump, baseplate and shaft :Equipped with an elastic torsionally double cardanic spacer coupling(base plate must have been adapted).We recommend the use of double cardanic spacer couplings underthe following operating conditions:Series NTWH and CTWH with a nominal impeller diameter of 315 and400, a double cardanic spacer coupling at temperatures greater than400 F is supplied as 854 plate series NTWH/CTWHWarp-resistant base plate made from steel, U section steel or castiron including collecting channel (see separate installation plans).

8 For couplings with / without spacers:Installation plan VM 854 D/GB/F/..U section steelCast-iron plateswithoutwithwithoutwithSingle joint couplings3100 cardanic3500 supplied from ALLWEILERS urface-cooled IEC three-phase cage motors; model IM B3, protec-tion type IP 55, insulation class F, performances and main dimensionsacc. to DIN 42 :Motors provided by the client must be able to generate acooling airflow in axial direction to the pump side that unimpededlycontacts the pump surface.

9 It must also be ensured that any heat canbe freely dissipated into the Pumps of series NBWH, CBWH, NIWH, CIWHD riven by surface-cooled IEC three-phase cage motors with axialthrust bearing, model IM V1, protection type IP55, insulation class F,performances and main dimensions acc. to DIN 42 :Motors provided by the client must contain a axial thrustbearing on the drive side for block or in-line 854 drawing - series NTWH / CTWH4cm4cmMaintenance-friendlydesign, easy to dis-mantle, pump housingcan remain in pipeworkLow axial thrust on shaftbearing as a result ofhydraulically-balancedimpellersImpelle rs with optimisedhydraulics and excellentefficiencyPressure-containing casingparts in nodular cast ironfor high operationalreliabilitySolid sliding bearing, lubricatedwith pumped medium.

10 Due to low temperature level,no evaporation of pumpingmedium,offering a high carrying force andlong life,available in SSiC/SSiC orcarbon/ steelOptimum temperaturereduction, due to long coo-ling-off section and largesurface area of the sealingspace, no additional coo-ling is requiredLarge sealing area speci-al design to prevent therotation of gas bubblesand partial dry running ofthe mechanical sealOptimised modularsystem as a result ofusing identical parts forthe process, block andin-line modelsOptimised rolling bearingoffering exceptional ope-rational reliability andlong lifeBalanced or unbalanced,maintenance-free stan-dard mechaincal seal withchambered O-ring,no additional coolingHigh mechanical stabilityand strength due tooptimum stiffening ribsarrangementAdded operationalreliability due to safetystuffing box followed by athrottle and cooling sectionRigid.