Bio Tower
Mechanical Strength of ETAPAK 120 Versus
Sheet Media Filterpak

As part of an evaluation of the mechanical integrity of Etapak 120, independent compression tests well carried out by Rubber and Plastic Research Associates (RAPRA) in its NAMAS TESTING LABORATORY.

The objective was to establish the suitability of Etapak 120 for bed heights of 10 m and above.

At the same time, random samples of Sheet Media filterpak were submitted to RAPRA for comparison

The compression tests were carried out in two principle direction, Vertically and Horizontally. The load were applied using a top plate of approximately 230 mm square and at a rate of 5 mm / minute, until maximum load had been achieved.

Because the physical shapes of the two types of packing are very different, the 'collapsing' location also varied. However, the over- all results were as follows :-

Average Compression Load at 'Collapse'

COMMENTS

	Because both types of packing are 'Random', the weakest point for either packing is in the horizontal mode.
	In the horizontal plane, Etapak 120 was over 3 times stronger than Sheet Media filterpak.
	Since the test-work, additional stiffening ribs have been added to Etapak 120 to further strengthen the media.
	Etapak 120 is suitable for bed heights up to and in excess of 10 m.