According to Google, a floor spring is a mechanical door closing device mostly used for glass doors along with patch fitting. Floor springs are mostly used where both pull and push movement is required. The most prominent area where floor springs are used is in Interior doors of a Business park, Malls, Hospital building
How to select: Choosing Floor spring is more over similar with door closer. In addition to weight capacity, other criteria may include:
The force generated by a door closing device which acts upon during the closing operation. It helps to adjust closing force according to width and weight of the door
A speed control operable to increase the closing speed and this the safe closing f the door. For example, to overcome the door seals, door locks and high air pressure.
Door closer warning in case of emergency such fire or earthquake Aesthetics
A compact design makes sure that it does not ruin a whole beauty of glass door.