End suction centrifugal pump
Non-self priming single stage horizontal end suction centrifugal pump
Axial inlet and radial outlet
The use of pull back structure, maintenance does not need to remove the pump body and pipeline
Performance and advantages
Stable operation, stable structure, easy maintenance, low noise
Minimum inlet pressure NPSH
In case that the pressure in pump is lower than the steampressure used to convey liquid,the cavitations willoccur.To avoid cavitations, a minimum pressure at theinlet side of the pump shall be guaranteed.The maximumsuction can be calculated with the following formula:H=Pbx10.2-NPSH-Hf-Hv-Hs
H-Maximum suction head(m)
Pb-Atmosphere pressure(bar)In a closed system,Pb means system pressure(bar)NPSH-Net positive suction head(m)It can be read from the point of Max.flow rate shown onNPSH curve.
Hf-Pipeline loss at the inlet(m)It is in accordance with the pipeline possible Max.flow.Hv-Steam pressure(m)
It depends on liquid temperature and steam pressure value.Hs-Safety margin(m)|
Minimum 0.5m delivery head.
If the calculated result H is negative ,the pump may rununder the Max.suction head H.In case the calculated re-sult H is negative,adelivery head of Min.inlet pressure isnecessary.
NOTE: Normally, the above calculation will not be done.
H is calculated in the following conditions:1.The liquid temperature is comparatively higher;2.Liquid flow exceeds rated value;3.Suction head is comparatively large or inlet pipeline long;4.System pressure is too low;5.Bad inlet condition.
Applications
◎Clean, thin, non-corrosive, non-flammable or nd-explosive liquid without grain or fiber.
◎Water supply system
◎HVAC system
◎Booster and constant water supply systemFire-fighting and splitting system
◎Irrigation and farmingIndustrial cooling and heat circulation systemIndustrial transferring and drainage system
NIS,NISF Sectional Drawing
Matereial list of NIS,NISF
Working Conditions
●Relative humidity of pumpThe pump is specifically designed for installationin non-corrosive and non-explosive environments witha relative humidity of no more than 95%.
●Ambient humidity and altitudeAmbient humidity and installation altitude are im-portant factors influencing motor service life as theyalso affect the life of bearings and insulation systems.The installation altitude is the height at which theinstallation location is above sea level.
●If the ambienttemperature exceeds the recommended maximum v-alue, or if the installation height exceeds the recom-mended maximum altitude, air cooling effect may bepoor due to low density and the motor shall not be op-erated at full capacity. In this case, choose a motorwith a higher output power.
NISO,NIS,NISF Spectral Spectrum
Produce Structure
●Non-self-priming, single stage, single suction, h-orizontal axial suction and radical discharge, pumpbody is fixed by base.Standard wear-resistant mechanical seal.TEFC motor, size complies to IEC standard.NISO pump use bearing cradle,which can orientatebearing, prevent from radical vibration, improve the ri-gidity of rotary part.
●NISO pump integral pump shaft, use deep grovegrease lubricated bearing.
●NISO pump use semi-flexible coupling to connectpump and motor.
●NISO pump dimension conforms to ISO2858 sta-ndard.
●NIS,NISF series pump are coupled with extensionshaft structure.
●Inlet and outlet flange and pump body of cast ironpump conform to standard of PN16 in GB/T17241.6(ISO7005-2); Inlet and outlet flange and pump body ofStainless Steel pump conform to standard of PN16 inGB/T9113 (ISO7005-1).
Product Range NIS NISF
