Wilo CronoBloc BL

Design

Glanded pump in block design with flange connection

Application

For pumping heating water (in accordance with VDI 2035), water-glycol mixtures, cooling water and cold water without abrasive substances in heating, cold water and cooling water systems.

Type key

Example BL 40/160-4/2
BL Monobloc pump
40 Nominal diameter DN of the pipe connection (pressure port)
160 Nominal impeller diameter
4 Rated motor power P2 in kW
2 number of poles

Special features/product advantages

  • Reduced life cycle costs thanks to optimized efficiency
  • High corrosion protection through cataphoretic coating of the cast iron components
  • Standard condensate drainage holes in the motor housings
  • High worldwide obtainability of standard motors (according to Wilo specifications) and mechanical seals
  • Meets user requirements due to performance and main dimensions in accordance with EN 733 (DIN for norm pumps)

Technical data

  • Minimum Efficiency Index (MEI) ≥ 0.4
  • Permissible temperature range -20 °C to +140 °C
  • Mains connection 3~400 V, 50 Hz (others on request)
  • Protection class IP 55
  • Nominal diameter DN 32 to DN 125
  • Max. operating pressure 16 bar (optionally 25 bar on request)
00625440_0

Description/design

Single-stage low-pressure centrifugal pump in block design, with axial suction port and radially arranged pressure port with

  • Mechanical seal
  • Flange connection with pressure measuring connection R 1/8
  • Lantern
  • Coupling
  • IEC standard motor

Materials

  • Pump housing and lantern: Standard: EN-GJL-250;
    optional: Spheroidal cast iron EN-GJS-400-18-LT
  • Impeller: Standard: EN-GJL-200;
    special version: Bronze CuSn 10
  • Shaft: 1.4122
  • Mechanical seal: AQEGG;
    other mechanical seals on request

Scope of delivery

  • Pump
  • Installation and operating instructions

Options

  • …-L1 variant with bronze impeller (at additional charge)
  • …-H1 variant with housing made of spheroidal cast iron (at additional charge)
  • Other voltages and frequencies as well as ATEX approval on request

Accessories

  • Mounting brackets for installation on a base
  • PTC thermistor sensor, PTC resistor tripping relay
  • Special motors
  • Special mechanical seals
  • SC-HVAC, CC-HVAC control systems and switchgears

General notes - ErP (ecological design-) directive

  • The benchmark for most efficient water pumps is MEI ≥ 0.70
  • The efficiency of a pump with a trimmed impeller is usually lower than that of a pump with the full impeller diameter. The trimming of the impeller will adapt the pump to a fixed duty point, leading to reduced energy consumption. The minimum efficiency index (MEI) is based on the full impeller diameter.
  • The operation of this water pump with variable duty points may be more efficient and economic when controlled, for example, by the use of a variable speed drive that matches the pump duty to the system.
  • Information on benchmark efficiency is available atwww.europump.org/efficiencycharts
  • Pumps with power consumption > 150 kW or a volume flow QBEP < 6 m3/h are not subject to the Ecodesign Directive for water pumps. Therefore, no MEI value is shown.