Customer case:

Stunning results with Valmet Hirun Web Stabilizer 4E at Orora Botany mill

May 3, 2016

The Orora's Botany mill in Sydney, Australia, has been ambitious about the performance and it has aimed to be within top board mills worldwide, in terms of tonnes per meter. Shortly after the upgrade with Valmet Hirun Web Stabilizer* blow boxes B9 broke its daily production record and the machine is now regularly running at 11.5 t/m/h.

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Sheet stability – creasing and edge lifting – in the early pre-dryer section has been a major time efficiency factor for us at high machine speeds. After the upgrade with Valmet Hirun Web Stabilizer boxes the topic is completely resolved – we are now regularly running at 11.5 t/m/h with the sheet being completely flat and seal maintenance is a non-issue. Best investment we have done for a while…”
Karl Achleitner, General Manager, Operations

SUMMARY

Location Botany, New South Wales, Australia
Customer challenge Sheet stability (creasing and edge lifting) in the early pre-dryer section was a major time efficiency factor at high machine speeds.
Solution Hirun web stabilizer rebuild comprising four new Valmet Hirun Web Stabilizer 4E  blow boxes, two new Valmet Hirun Web Stabilizer 2E  blow boxes and relocating of three old Valmet Hirun Web Stabilizer 2  blow boxes. The relocated  hirun web stabilizer 2   blow boxes were maintained and upgraded to e-model as well.
Results Stable web run, higher speeds and fewer breaks in the first group. The machine is now regularly running at 11.5 t/m/h.
Keywords Board and paper, Asia-Pacific, rebuilds and upgrades

Technical data

Orora Botany Mill B9

Grade Recycled liner and fluting
Speed 1,600 m/min
Wire width 6,250 mm