Kaeser FBS series rotary screw blowers

Kaeser recently expanded its FBS series of rotary screw blowers with the inclusion of the FBS 720 model.

The FBS series offers flow rates of 18 to 72 m³/min and pressure differentials from 0.3 to 1.1 bar, as well as a selection of motors ranging from 45 to 110 kW.

The SFC version is equipped with a frequency converter and a synchronous reluctance motor — a slip-free design that combines all the advantages of high-efficiency permanent-magnet motors with those of robust, service-friendly asynchronous motors. Thanks to variable speed control, the flow rate can be adjusted as required and a control range of 1:4 is achieved, allowing dynamic operation.

The STC version is now equipped with an energy-saving IE4 Super Premium Efficiency motor, which reduces energy consumption.

On both versions, power transmission from the motor to the airend takes place via loss-free and maintenance-free gearing, which results in an improvement of up to 7% in specific package input power as compared to the previous model. In order to ensure that the specified performance figures are translated into reality, Kaeser says it guarantees performance in accordance with the strict tolerances of the ISO 1217-C/E standard.

Despite the compact dimensions of the FBS, Kaeser has succeeded in dispensing with the requirement for maintenance access from one side, thereby permitting side-by-side installation. This results in considerable space savings, particularly when operating multiple blower systems.