Schwammkugeln – Typ RS + RSL
On-line tube cleaning systems operating at temperatures up to 90°C (e.g. steam condensers and heat exchangers in conventional and nuclear power plants and lower temperature MSF units). Other types of ball are available for other applications.
Type RS Sponge Balls are available in a range of standard sizes from 10 to 45 mm diameter, in 1 mm steps.
Each size is available in a standard medium grade of hardness.
Non-standard sizes or hardness’s are available on request.
The composition of the balls is based on a natural rubber mixture containing inert filler material. 10-20% of the mixture is vulcanizing agents. The exact mixture has been chosen so as to give the optimum combination of physical properties, ball in life and cleaning effect.
There is no health risk associated with the ball mixtures; all chemicals used are permitted for use in contact with foodstuffs.
The standard colour is red.
Light ball colour is yellow.
Sinking– and watering characteristics:
Immediately prior to use the balls are watered by squeezing them under water in the ball vessel about to 3 to 4 times to expel air.
To ensure that all tubes are cleaned, the watered balls should have a specific gravity close to that of the cooling medium.
They have a sinking velocity of:
Standard ball – 8-12 cm/sec.
Light ball – 1-4 cm/sec.