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Wilo-Stratos GIGA B | Wilo

Wilo-Stratos GIGA B

Maximum performance at the highest levels of energy efficiency.

Your advantages
Wilo-Stratos GIGA B

Maximum performance at the highest levels of energy efficiency.

The Wilo-Stratos GIGA B is the ideal high-efficiency pump for use in heating, air conditioning and cooling applications in buildings where large volumes of water have to be pumped to great delivery heads.

Your advantages

  • Innovative, high-efficiency pump for maximum overall efficiency with principal dimensions in accordance with EN 733
  • High-efficiency EC motor with efficiency class IE5 in accordance with IEC 60034-30-2
  • Integrated pump support feet and optional supporting block allow for easy installation
  • Optional interfaces for bus communication using plug-in IF-Modules
Series description


High-efficiency monobloc pump with IE5 motor and electronic power adjustment in glanded pump design Version as single-stage low-pressure centrifugal pump with flange connection and mechanical seal.


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


Operating modes

  • Δp-c for constant differential pressure
  • Δp-v for variable differential pressure
  • PID-Control
  • Constant speed (n=constant)

Manual operation level

  • Green button and display

Manual functions

  • Differential pressure setpoint setting
  • Setting the speed (manual control mode)
  • Setting the operating mode
  • Setting the pump ON/OFF
  • Configuration of all operating parameters
  • Fault acknowledgement

External control functions

  • "Overriding Off" control input
  • “External pump cycling” control input (only effective in twin-head pump operation)
  • Analogue input 0 – 10 V, 0 – 20 mA for constant speed (DDC) and remote setpoint adjustment
  • Analogue input 2 – 10 V, 4 – 20 mA for constant speed (DDC) and remote setpoint adjustment
  • Analogue input 0 – 10 V for actual value signal from pressure sensor
  • Analogue input 2 – 10 V, 0 – 20 mA, 4 – 20 mA for actual value signal from pressure sensor

Signal and display functions

  • Collective fault signal SSM
  • Collective run signal SBM

Data exchange

  • Infrared interface for wireless data exchange with IR-Monitor/IR-Stick
  • Plug-in position for Wilo IF-Modules (Modbus, BACnet, CAN, PLR, LON) for connection to building automation

Safety functions

  • Full motor protection with integrated trip electronics
  • Access disable

Dual pump management (2 x single pump, Y-piece application only)

  • Main/standby operation (automatic fault-actuated switchover)
  • Pump cycling main/standby operation after 24 hours
  • Parallel operation



Wilo-Stratos GIGA B 40/1-51/4.5

Stratos GIGA

High-efficiency pump


Monobloc design


Nominal diameter DN of the flange connection (for Stratos GIGA B: discharge side) [mm]


1 = lowest selectable delivery head [m] 51 = highest selectable delivery head [m]


Rated power P2 in [kW]


Version: E.g. R1 - version without differential pressure sensor

Technical data

  • Permitted temperature range of the fluid: -20 °C to +140 °C
  • Mechanical seal for pumping water up to Tmax = +140 °C. Up to T ≤ +40 °C, a glycol admixture of 20 % to 40 % by volume is permissible. An alternative mechanical seal must be provided for water-glycol mixtures with a glycol content of > 40% to max. 50% by volume and a fluid temperature of > +40 °C to max. +120 °C or other fluids that differ from water. When using water-glycol mixtures, the use of an S1 variant with a corresponding mechanical seal is generally recommended.
  • Mains connection:
  • 3~440 V ±10 %, 50/60 Hz
  • 3~400 V ±10 %, 50/60 Hz
  • 3~380 V -5% +10%, 50/60 Hz

Compliance with electromagnetic compatibility without additional measures:

    • Interference emission for residential environment according to EN 61800-3:2018
    • Interference immunity for industrial environments according to EN 61800-3:2018
  • Protection class IP55
  • Max. operating pressure 16 bar up to +120 °C, 13 bar up to +140 °C


  • Pump housing and lantern: EN-GJL-250
  • Impeller: PPS-GF40
  • Shaft: 1.4122
  • Mechanical seal: AQEGG; other mechanical seals on request

Scope of delivery

  • Pump
  • Installation and operating instructions


  • Variant …-R1 without differential pressure sensor
  • …-S1 variant with special mechanical seal


  • 1 mounting bracket with fixation material for installation on a base
  • Installation aid for mechanical seal
  • IR-Stick
  • IF module PLR for connecting to PLR/interface converter
  • IF module LON for connection to the LONWORKS mains network
  • IF module BACnet
  • IF module Modbus
  • IF module CAN
  • Control system VR-HVAC
  • Control system CCe-HVAC
  • Control system SCe-HVAC
  • Differential pressure sensor kits 0 – 10 V for pumps in version ...-R1

Installation and operating instructions

Wilo-Stratos GIGA, Wilo-Stratos GIGA B

Article Number 2227281
Edition 2023-05
Page format 50.4 x 71.3 mm
Number of pages 332
PDF (22 MB)

Wilo-Stratos GIGA, Wilo-Stratos GIGA B

Article Number 2227280
Edition 2023-05
Page format 50.4 x 71.3 mm
Number of pages 84
PDF (10 MB)

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