Controlled ejectors

An ejector pump (also called jet pump) is a special version of a three-way valve. By means of an ingenious design, the so-called propulsion flow causes a negative pressure inside the fitting. This causes another medium to be sucked in (suction flow). Both flows are mixed, whereby kinetic and thermal energy is exchanged. The mixture exits the pump via the third port.


Valves for lucrative savings by sophisticated use of physical principles. The principle of the ejector is based on the Bernoulli equation established by the Swiss mathematician and physicist Daniel Bernoulli (1700-1782) and on the Venturi effect discovered by the Italian physicist Giovanni Battista Venturi (1746-1822).

Baelz ejectors are durable, low-maintenance, and energy-saving. These ejectors enable water and steam flows to be controlled easily. Ejectors can be used wherever an adequate pressure difference is generated by a main pump.

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