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Kinetic Flow Systems Kinetic Flow Systems

Kinetic Flow Systems Kinetic Flow Systems

Kinetic Flow Systems Kinetic Flow Systems

Kinetic Flow Systems Kinetic Flow Systems

Kinetic Flow Systems Kinetic Flow Systems

Kinetic Flow Systems Kinetic Flow Systems
KFS

NL Series

NL Series

Parameters

Qmax: 3,000 m3/h


Hmax: 140 m

 

 

Design

Baseplate pump with axial suction, in accordance with EN  733 (previously DIN 24255) and ISO 5199

 

Application

  • Pumping clean or slightly contaminated water (max. 20 ppm) without solid matter for circulation, transfer and pressure boosting purposes.
  • Pumping heating water in accordance with VDI 2035, water/glycol mixtures, cooling/cold water and industrial water
  • Applications in municipal water supply, irrigation, building services, general industry, power stations, etc.

 

Scope of delivery

  • Pump with free shaft end or
  • Pump on baseplate with coupling and coupling protection, without motor or
  • Completely mounted pump on baseplate with electric motor
  • Housing: EN-GJL 250 - grey cast iron; impeller: EN-GJL 250 - grey cast iron or CC480K-GS - bronze; Mechanical seal or stuffing box; Standard coupling or spacer coupling
  • Installation and operating instructions

 

Type key

 

Example NL 40/200B-11/2
NL Standard pump with axial suction
40 DN for the pressure flange
200b Impeller nominal diameter
11 Nominal motor power in kW
2 2-pole motor

 

Special features/product benefits

  • Burgmann mechanical seal with conical sealing chamber
  • Brand shaft protection
  • SPM connections for vibration and temperature sensors
  • Shaft deflection according to DIN ISO 5199
  • Permanently lubricated, generously dimensioned ball bearings (2Z version)

Scope of delivery

  • Pump with free shaft end or
  • Pump on baseplate with coupling and coupling protection, without motor or
  • Completely mounted pump on baseplate with electric motor
  • Housing: EN-GJL 250 - grey cast iron; impeller: EN-GJL 250 - grey cast iron or CC480K-GS - bronze; Mechanical seal or stuffing box; Standard coupling or spacer coupling
  • Installation and operating instructions

 

Materials

  • Pump housing
    • Grey cast iron spiral with anti-rotation ribs.
    • With axially aligned suction piece and radial pressure ports and cast assembly feet.
    • Dimensions and hydraulics are in accordance with DIN EN 733
    • Flange PN 16 in accordance with DIN 2533 (DN 200 - PN 10/DIN 2532)
  • Standard mechanical shaft seal AQ1EGG for water up to 140°C
  • Stuffing box for water up to 110°C

 

Description/design

  • Single-stage low-pressure centrifugal pump as baseplate pump with axial suction piece with flanged bearing bracket and axis mounting for flexibly coupled drives.
  • Spacer coupling (sleeve coupling) available as an option; they make it possible to leave the motor in position when removing the rotor unit
  • Shaft deflection meets the requirements of ISO 5199

 

Commissioning

  • If pumps with 2900 rpm are installed inside residential buildings, then corresponding noise reducing measures are to be implemented.
  • Pump curves and specific motor powers depend on the respective fluid being pumped. Pump curves and power vary considerably when fluids are conveyed that differ from water in thickness and/or viscosity. For this, please observe the table "Recommended limit values for dimensioning".
    The recommended limit values for dimensioning are calculated as follows:
    Qoptimum (volume flow at which the pump reaches its best efficiency), to be read from the individual pump curve; factors Qmin and Qmax , to be taken from the table "Recommended limit values for dimensioning".

    Qmin dimensioning = Qmin x Qoptimum
    Qmax dimensioning = Qmax x Qoptimum
    Example: Size NL 32-125
    Qmin = 0.3 x 8 = 2.4 m3/h
    Qmax = 1.2 x 8 = 9.6 m3/h
  • Load-sensitive pump output
    All Wilo standard pumps are equipped with IEC standard motors. The Wilo control devices are suitable for automatic load-sensitive speed control of pumps that are driven by any standard motors of conventional manufacture.
  • Main/standby mode

 

Accessories

Automatic speed control:

for automatic, infinitely variable pump power control. for additional information, see "Switchgears and control devices" section.