Kaeser FBS 720 rotary screw blower

Kaeser recently expanded its FBS series of rotary screw blowers with the inclusion of the FBS 720 models. The oil-free compression blower technology is designed especially for water industry applications.

With a flow rate 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 series has good energy efficiency, space-saving design and automation.

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 good dynamic operation.

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

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.

Furthermore, efficiency remains constant across the entire control range and flow rate is virtually unaffected by pressure fluctuations. This allows the blowers to be regulated and adjusted at all times via the master control system.

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

The units are delivered ready for immediate connection, including controller and frequency converter or star-delta starter. All units are CE and EMC-certified, thereby minimising the planning, construction, certification, documentation and commissioning costs for planners, operators and plant manufacturers.

The FBS series models are available to order from September 2022.