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Цена по запросу

Single-stage glanded centrifugal pump in monobloc design for an installation on a base with integrated frequency converter for an electronic control for constant or variable differential pressure (Δp-c/Δp-v). The CronoBloc BL-E has been predominantly designed for pumping heating water (acc. to VDI 2035), cold water and water/glycol mixtures without abrasive substances in heating, air-conditioning and cooling systems.


  • Single-stage low-pressure centrifugal pump
  • Spiral housing in monobloc design with flange and housing dimensions according to DIN EN 733, flanges PN 16 — according to EN 1092-2
  • Low-oscillation and low-noise monobloc design with lantern, foot on pump housing and rigidly connected standard motor
  • All grey cast iron components with cataphoretic coating as standard
  • Direction-of-rotation-independent bellows mechanical seal with forced flushing and cavitation-reducing impeller.
  • Mechanical seal for pumping water up to Tmax = +140 °C. A glycol admixture of 20% to 40% by volume is permissible up to T <= +40 °C. An alternative mechanical seal must be provided in water-glycol mixtures with glycol proportions > 40 % up to max. 50 % by volume and a fluid temperature of > +40 °C up to max. +120 °C or fluids other than water. When using water-glycol mixtures, the use of an S1 variant with a corresponding mechanical seal is generally recommended.

Standard equipment

Pump display for indication of:

  • Control mode Δp-c (constant differential pressure), Δp-v (variable differential pressure), PID controller, n-constant (constant speed)
  • Setpoint (e.g. differential pressure or speed)
  • Error and warning messages
  • Actual values (e.g. power consumption, actual value of the sensor)
  • Operating data (e.g. operating hours, energy consumption)
  • Status data (e.g. status of SSM and SBM relay)
  • Device data (e.g. pump name)
  • Operating mode (for Y-piece installation only: main/standby operation, parallel operation)

One-button manual operation level for:

  • Pump On/Off
  • Setpoint and speed adjustment
  • Selecting the operation and control mode
  • Configuration of operating parameters
  • Fault acknowledgement

Additional functions

  • Interfaces: Control input «Overriding Off», analogue input 0-10 V, 2-10 V, 0-20 mA, 4-20 mA for constant speed (DDC) or for remote setpoint adjustment, IR interface for wireless communication with operating and service unit Wilo-IR-Monitor/IR-Stick, plug-in slot for Wilo IF modules for connecting to building automation, configurable, potential-free fault and run signal
  • Three-phase AC motor with frequency converter
  • Integrated dual pump management
  • Integrated full motor protection (PTC thermistor sensor) with trip electronics
  • Standard condensate drainage holes in the motor housing (closed upon delivery)
  • Different operating modes for heating (HV) or air-conditioning (AC) applications
  • Access disable on the pump
  • Different operation levels: Standard/Service


  • Supporting blocks for fixing to the base
  • IR-Monitor
  • IR-Stick
  • IF module PLR
  • IF module LON
  • IF module Modbus
  • IF module BACnet
  • IF module CAN
  • Control systems VR-HVAC/CCe-HVAC/SCe-HVAC
  • Differential pressure sensor (DDG) sets 0-10 V for pumps in version ...-R1
Packaging property
Transport packaging 
Packaging type
Cardboard box 
Pieces per pallet
Number per layer
Approved liquids (other liquids upon request)
Heat carrier oil
Special version at additional charge 
Heating water (as per VDI 2035)
Cooling and cold water circulation systems
Rated power
1.5 kW 
Insulation class
Interference emission
EN 61800-3 
Max current
4.9 A
Motor protection
PTC integrated 
Mains connection
3~380 V, 50/60 Hz 
Protection class motor
Interference immunity
EN 61800-3 
Power consumption
1800 W
Motor efficiency class
Hydraulic data
Minimum efficiency index (MEI)
Maximum operating pressure
16 bar
Min. fluid temperature
-20 °C
Min. ambient temperature
0 °C
Max. fluid temperature
140 °C
Max. ambient temperature
40 °C
Shaft seal
Stainless steel 
Grey cast iron 
Pump housing
5.1301/EN-GJL-250 KTL-coated 
Product data
EAN number
Product description
Article number
Date of sales availability
Minimum order quantity
Dimension, weight
545 mm
Width with packaging
600 mm
Gross weight, approx.
55 kg
302 mm
358 mm
Length with packaging
800 mm
Net weight, approx.
50 kg
Height with packaging
525 mm
Installation dimensions
Pipe connection on the suction side
DN 50 
Pipe connection on the discharge side
DN 32 
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