Water ejectors

Water ejectors use liquids (mainly water) as propulsion media. The propulsion flow is greatly accelerated in the nozzle, thereby generating a negative pressure that causes a suction flow. Both flows are mixed, whereby kinetic and thermal energy is exchanged. The mixture exits the ejector via the third port.

Baelz-hydrodynamic®

The controllable water ejector combines the functions of four single components: It generates circulation in the area of the consumer, it adjusts the circulation volume according to the actual heat requirement, it regulates the temperature and compensates for fluctuations in differential pressure.

Saving electrical energy through energy-efficient equipment and installations is becoming increasingly important. Where heating water would usually be distributed to secondary circuits using a control valve and a pump for each circuit, Baelz uses controlled ejector technology.

Many of our heating and ventilation systems have been in operation for over 40 years, reducing operating costs.

The following video gives an insight into the ejector technology.


Advantages at a glance
  • Good controllability over the entire load range
  • Just one common main pump supplies all control loops, meaning lower energy costs
  • Simplified system design due to fewer components
  • Fewer data points in the higher-level control system
  • Lower return temperatures
  • Hydraulic stability
  • Increased plant availability

Jetomat® baelz 471

Water/water ejector with red bronze body and 1/2" to 1 1/2" threaded connections, for heating systems.
 

Nominal pressure Nominal diameter Body material Temperature range
PN 16 - 25 G 1/2 - 1 1/2 red bronze (CC491K) up to 150°C

Operating instructions

Declarations of conformity / Manufacturer's declarations

Data sheets

Drawings

Jetomat® baelz 472

Small controllable water/water ejector with red bronze body and 2" threaded connections, for heating systems.
 

Nominal pressure Nominal diameter Body material Temperature range
PN 16 G 2 red bronze (CC499K) up to 130°C

Operating instructions

Data sheets

Drawings

Jetomat® baelz 474

Four-way radiator water-water ejector with red brass housing and threaded connection for heating systems.

  • Housing made of cast brass CuZn37
  • Internal parts made of stainless steel
  • Stroke - 3 mm
  • Weight, approx .: 0.65 to 0.9 kg depending on the equipment
  • With different nozzle inserts according to the design
  • Several control / actuator options
  • Also applicable as minimum quantity injection valve

Jetomat® baelz 475

Economical water/water ejector with red bronze body and 3/4" threaded connections, for heating systems.
 

Nominal pressure Nominal diameter Body material Temperature range
PN 16 - 25 G 3/4 red bronze (CC491K) up to 110°C

Operating instructions

Data sheets

Drawings

Jetomat® baelz 480

Controllable ejector with flanged connections to mix and recirculate liquids.
 

Nominal pressure Nominal diameter Body material Temperature range
PN 16 / 40 DN 15 - 300

spheroid ductile iron
(5.3103) /

cast steel (1.0619)

-10°C to 240°C
(without cooling tube)

-10°C to 350°C
(with cooling tube)

Operating instructions

Declarations of conformity / Manufacturer's declarations

Data sheets

Spare parts

Drawings

Jetomat® baelz 480-BK-SS

Controllable ejector with flanged connections, cooling tube and stainless steel bellows, to mix and recirculate liquids. Suitable for applications with thermal oil.
 

Nominal pressure Nominal diameter Body material Temperature range
PN 16 / 40 DN 15 - 300

spheroid ductile iron
(5.3103) /

cast steel (1.0619)

-10°C to 350°C

The ejector as modular unit

Skillfully designed layout to the latest technical standards, including all necessary measurement points and piping.

to system solutions with water ejectors

Answers to your questions

Liquid ejectors

Below you can find a special dimensioning tool which allows you to select and recalculate Baelz liquid ejectors:

 

  • Fill out the download form that opens when you click on the files, and download both files.
     
  • To open the EXE file, you need a personal activation code which will be sent to you upon request. Fill out the form and do not forget to indicate in your message your computer code which will be displayed automatically when you open the file.
     
  • The PDF file above provides you with useful information and details on how to activate and use the selector.
     
  • To complete the installation process, enter your "Activation Code" which you have received by e-mail from the Baelz team.
     
  • Confirm with OK and get started.