A channel impeller works directly on the pumped liquid with the liquid passing through the impeller itself. A channel impeller can be described as a closed, semi-open or open impeller.
Passive and active chilled beams are used for cooling building air. Passive chilled beams cool the inside air without the noise and expense of ductwork and air handler units. Active chilled beams generally have much higher sensible cooling capacities than passive chilled beams.
A chiller is a component that is used to cool water. The cooled water is pumped from the chiller to a water/air or water/water heat exchanger, where it can be used to cool air or water respectively.
Chlorination is probably the most common method of treating microorganisms in water. This method is mainly used by water utility companies in order to kill microorganisms in water right from the water production site up to the consumers water tap.
Water disinfection with chlorine dioxide is a very efficient and gentle way of fighting legionella bacteria and all kinds of micro organisms in water such as viruses, parasites and fungus spores.
A cleaning pig is designed to facilitate the removal of sediments in a drain or sewer. It is formed as a cylindrical device with shallow channels on the surface and is propelled through the pipe by the flow.