Main applications hpk

  • Auxiliary Systems
  • Boiler feed systems
  • Building services
  • Cooling water and condensate
  • District heating
  • Energy
  • Heating / ventilation / air-condition
  • Industry engineering
  • Nuclear Power Stations
  • Power Stations < 100 MW
  • Power Stations > 100 MW
  • Special processes
  • Steam and hot water, district heating

Design hpk

Horizontal radially split volute casing pump in back pull-out design, with radial impeller, single-entry, single-stage, to ISO 2858 / ISO 5199. Optional TRD type testing by TÜV. ATEX-compliant version available.

Application pump hpk

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 4,800.0 m³/h
  • H max 275.0 m

Fields of Application hpk

HPK pumps in standard design are used for plants where hot water thermal oils must be transported in pipeline or tank systems, particularly in  medium-sized and large heating systems, forced circulation boilers, district heating systems and similar.

HPK-E and HPK-E4 have been type-tested to TRD (German Steam Boiler Regulations) by TÜV (Technical Control Board).
Type test certificates can be offered and supplied on request.

Desing Details pump hpk


reduced axial thrust and shaft seal balancing due to back vanes.


Radially split, consisting of volute casing and discharge cover.
HPK-S with casing wear ring, HPK-E without casing wear ring.
Double volute depending on the pump size.


Axial thrust is balanced by means of back vanes

Rotor and bearings

are dimensioned so as to ensure a shaft deflection below 0.05 mm and a bearing life of more than 17500 operating hours

Overview of technical data hpk

Q (50Hz)1.0 – 4,800.0 (m³/h)
H (50Hz)2.0 – 275.0 (m)
Type of bearingRolling element 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)JS 1030, JL 1040, 1.4408
Type of installationLong-coupled
Type of couplingDirect
Type of lubricationOil lubrication
Max. permissible fluid temperature240.0 (°C)
Nozzle positionEnd suction
Maximum operating pressurePN 40
Pull-out designYes
Pump set locationDry installed
Shaft material (EN standard)C45+N
Suction characteristicsNon-priming
Type of casingVolute casing
Type of impellerRadial, Closed
Type of connectionFlange
Casing material (EN standard)JS 1025, 1.7706, GP240GH+N
eClass assignment36410000, 36410100, 36410101
Installation positionHorizontal
Shaft seal typeMechanical seal, Gland packing
Main applicationsIndustry and process engineering, Energy, Building services
Casing materialCast steel, Nodular cast iron
Maximum discharge-side pressure40.0 (bar)
Maximum drive rating3200.0 (kW)
Type of installationStationary
Maximum speed of rotation3500.0 (1/min)