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Belt Sag

Conveyor belt sag also referred to as catenary sag, is based on standard catenary theory. Sag is expressed as the percentage height drop based on the tension between two conveyor idlers. These percentages are expressed as limits to this height drop, and thereby define the minimum allowable tension, during the applicable running condition, at that point. The table below is a list of design sag limits from various design manuals.



Delta Reference Notes Url
0.5 ISO 5048:1989 No clear design factor indicated. Link
2 ISO 5048:1989 No clear design factor indicated. Link
3 20° Trough - Fine Material Link
3 35° Trough - Fine Material Link
2 35° Trough - Lumps up to max lump size Link
1.5 45° Trough - Max lump size Link
3 20° Trough - Max lump size Link
2 35° Trough - Max lump size Link
2 45° Trough - Lumps up to max lump size Link
3 20° Trough - Lumps up to max lump size Link
3 45° Trough - Fine Material Link




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