Main applications hpk-l

  • Auxiliary Systems
  • Boiler feed systems
  • Cooling water and condensate
  • District heating
  • Energy
  • Industry engineering
  • Nuclear Power Stations
  • Power Stations < 100 MW
  • Power Stations > 100 MW
  • Special processes
  • Steam and hot water, district heating
  • Water treatment

Design hpk-l

Horizontal radially split volute casing pump in back pull-out design to ISO 2858 / ISO 5199, single-stage, single-entry, with radial impeller. Equipped with heat barrier, seal chamber air-cooled by integrated fan impeller, no external cooling. ATEX-compliant version available.

Application pump hpk-l

Pumping hot water and thermal oil in piping systems or tank systems, particularly in medium-sized and large hot-water heating systems, forced circulation boilers, district heating systems

Technical data

  • Q max 1,400.0 m³/h
  • H max 233.0 m

desing pump hpk-l

▪ Volute casing pump
▪ Horizontal installation
▪ Back pull-out design
▪ Single-stage
▪ Meets the technical requirements to ISO 5199
▪ Dimensions and ratings to ISO 2858 complemented by pumps of nominal diameters DN 25, DN 200 and above

Pump casing

▪ Single or double volute, depending on the pump size
▪ Radially split volute casing
▪ Volute casing with integrally cast pump feet
▪ Replaceable casing wear rings (as required)

Impeller type

▪ Closed radial impeller with multiply curved vanes

Shaft seal

▪ KSB mechanical seal, optimised for installation in an HPK-L pump, with integrated shaft sleeve (standard Europe)
▪ Optional commercial single mechanical seals with replaceable shaft sleeve (standard Asia/Americas)
▪ Versions with two mechanical seals can be supplied for heat transfer applications.


▪ Version with single mechanical seal
– Radial bearing: plain bearing, product-lubricated
– Fixed bearings: two angular ball bearings, greasepacked
▪ Version with two mechanical seals
– Radial bearing: plain bearing, product-lubricated

Overview of technical data hpk-l

Q (50Hz)1.0 – 1,400.0 (m³/h)
H (50Hz)3.5 – 233.0 (m)
Type of bearingRolling element and plain bearings
Casing partitionRadially split
Drive frequency50 Hz /60 Hz
Type of driveElectric motor
Drive voltageLow voltage
No. of impeller entriesSingle entry
Impeller material (EN standard)1.4408, EN-GJL-250
Type of installationLong-coupled
Type of couplingDirect
Type of lubricationGrease / Product lubrication
Max. permissible fluid temperature400.0 (°C)
Nozzle positionEnd suction
Maximum operating pressurePN 40
Pull-out designYes
Pump set locationDry installed
Shaft material (EN standard)1.4021+QT800
Suction characteristicsNon-priming
Type of casingVolute casing
Type of impellerClosed, Radial
Type of connectionFlange
UNSPSC classification4015150300
Casing material (EN standard)1.7706, GP240G+N
eClass assignment36410101, 36410000, 36410100
Installation positionHorizontal
Main applicationsIndustry and process engineering, Energy
Casing materialCast steel
Maximum discharge-side pressure40.0 (bar)
Maximum drive rating500.0 (kW)
Type of installationStationary
Maximum speed of rotation3600.0 (1/min)