KSB to showcase advanced high-efficiency pumps

The Calio S is intended for heating, ventilation and air-conditioning systems and the Calio-Therm S for drinking water circulation systems.


KSB Group will showcase for – the first time – its latest generation of high-efficiency circulator pumps of the Calio S and Calio-Therm S type series, at ISH 2019, which takes place from 11-15 March in Frankfurt.

The Calio S is used for heating, ventilation and air-conditioning systems while Calio-Therm S is used for drinking water circulation systems.

The developers have placed a particular focus on ease of use and compatibility with existing systems and they come in a new look compared to their predecessors.

The new look pump has a 230 V power plug in screw-in design and a straight cable entry. With this, connecting the power cable is easy. It also has a vent plug at the front which enables convenient manual venting and deblocking of the pump if required after long standstill periods.

Measurements in KSB’s acoustic test facility resulted in noise characteristics below 30 dB(A). This makes the new pumps some of the quietest circulator pumps on the market.

Operation is straightforward using pushbuttons and a display with symbols. An economical LCD field shows the operating mode, current input power, flow rate and head in alternation.

If the Setback Operation function is enabled, the pumps identify minimum heat demand when the fluid temperature sinks continuously. They automatically reduce the setpoint by 30 percent. When heat demand rises again, the pumps revert to their previous setpoint.

For applications requiring heads of up to eight metres, two additional sizes, Calio S 25-80 and Calio S 30-80, will be on offer from mid-2019.

The pumps are available in standard overall lengths of 130 mm and 180 mm in grey cast iron or stainless steel. All 180 mm pumps are fitted with thermal insulation shells as standard.