PPS (Silica gel)

The third generation Silica rotors are intended for use in dehumidifiers and desiccant cooling systems. The design is of third generation Proflute silica gel rotors which are well known as market leading products, and widely recognized for outstanding performance in most applications and environments.

The PPS family of rotors has higher contents of active silica gel than any other rotor in its market segment. The silica gel is produced in situ during the manufacturing process, and the PPS formula ensures improved dehumidification performance and energy efficiency. As a result, a dehumidifier with a PPS rotor offers more dehumidification for less running cost than a unit equipped with another rotor of the same dimensions. This is an important factor when LCC aspects (Life Cycle Cost) for a dehumidifier plant are evaluated.

To protect the integrity of our customers, Proflute holds patents on the unique manufactur-
ing process of PPS rotors. The well defined and stable manufacturing conditions makes it possible to closely tailor the amount and characteristics of the silica gel used in the rotors. This ensures and maintains a high level of repeatability in the process which in the long run guaranties a stable and high quality production output of world class rotors. The capacity, pressure drop and other process characteristics of the PPS rotors are easily calculated using our projecting software, which is available for all regular customers.

Apart from delivering rotors with standard dimensions and properties as outlined overleaf, Proflute can produce replacement rotors in sizes to fit most existing dehumidifiers.

Our offer to you is to provide rotors to fit your needs, with world class performance and dimensioned to your specific demands.


Material composition

• Very high silica gel contents – 82%

• Low glass fiber contents– only 16%

• Acrylic surface coating – remaining 2%


Fire resistance

• ASTME E-84 tested:

• Flame index – 0

• Smoke produced – 0


Technical properties

• No limit on high relative humidity

(as long as no droplets are introduced in rotor

during operation)

• Rotor can be washed in water

(with weak non-alkaline detergent after

saturation in humid air)


Physical properties

• Dry material density – ~240 kg/m3

• Water vapour adsorption capacity >40%

• Surface compression strength – >200 kPa


Dimensions, standard rotors