Main applications ynk

  • Boiler feed systems
  • Energy
  • Nuclear Power Stations
  • Power Stations < 100 MW
  • Power Stations > 100 MW
  • Turbine Island

Technical data

  • Q max 3,700.0 m³/h
  • H max 250.0 m

Design ynk

Horizontal radially split single-stage double-entry boiler feed booster pump (booster system) with cast steel single or double volute casing.

Application pump ynk

Pumping feed water in power stations and industrial plants.

Drive pump ynk

▪ Electric motor
▪ Turbine via gear

Desing Details pump ynk


▪ Radially split volute casing pump with radial impeller
▪ Volute casing (single or double volute)

▪ Connected by means of studs with covers inserted and flange-mounted on either side
▪ Horizontal installation
▪ Double-entry
▪ Single-stage

Direction of rotation

▪ Depends on casing position and nozzle orientation
▪ Clockwise or anti-clockwise, viewed from the drive

Suction nozzle

Connection type 1:
▪ Suction nozzle with flange connection to DIN EN 1092-1, raised face type B
▪ Suction nozzle with flange connection to ASME Class 300, raised face type RF
Connection type 2:
▪ Weld end

Impeller type

▪ Closed double-entry radial impeller with multiply curved vanes

Axial thrust balancing

▪ Hydraulically by double-entry impeller
▪ Absorption of residual axial thrust by pivoted segmental thrust bearing


▪ Forced oil lubricated radial plain bearings and pivoted segmental thrust bearings

Shaft seal

▪ Single mechanical seal
– Uncooled
– With jacket cooling
– With mating ring cooling
– With circulation cooling
▪ Replaceable shaft sleeve

Overview of technical data ynk

Q (50Hz)150.0 – 3,700.0 (m³/h)
H (50Hz)30.0 – 250.0 (m)
Type of bearingPlain bearings
Casing partitionRadially split
Drive frequency50 Hz /60 Hz
Type of driveElectric motor, turbine
Drive voltageLow voltage, high voltage
No. of impeller entriesDouble entry
Type of installationLong-coupled
Type of couplingDirect, Gear
Type of lubricationPressurized oil lubrication
Max. permissible fluid temperature210.0 (°C)
Nozzle positionVariable
Maximum operating pressurePN 40
Pump set locationDry installed
Suction characteristicsNon-priming
Type of casingVolute casing
Type of impellerClosed, Radial
Type of connectionFlange, weld ends
eClass assignment36410100, 36410101, 36410000
Installation positionHorizontal
Shaft seal typeMechanical seal
Main applicationsEnergy
Casing materialCast stainless steel
Maximum discharge-side pressure40.0 (bar)
Maximum drive rating3000.0 (kW)
Type of installationStationary
Maximum speed of rotation1800.0 (1/min)