Operating and Maintenance Manual
Belt Tensioning Instructions
Content
- Health and Safety
- Cautionary Notes
- Delivery
- Off Loading Handling & Erection
- Installation
- Commissioning and Testing
- Maintenance
of equipment
held in storage conditions
for a period of up to 2 years - Fan section
- Fan Maintenance
- Electric Motors
- Drive Belts
- Belt Tensioning Instructions
- Electric Air Heater Batteries
- Heating and Cooling Coils
- Recuperators
- Dampers
- Air Filters
- Maintenance Schedule
- Invalidation of Guarantee
Tensioning Forces
| Belt Section | Force required to deflect belt 16mm per metre
of span |
|
Small Pulley Diameter |
Kilogram Force |
|
| SPZ | 56-95 mm | 1.3-2.0 kg |
| 100-140 mm | 2.0-2.5 kg | |
| SPA | 80-132 mm | 2.5-3.6 kg |
| 140-200 mm | 3.6-4.6 kg | |
| SPB | 112-224 mm | 4.6-6.6 kg |
| 236-315 mm | 6.6-8.7 kg | |
| SPC | 224-355 mm | 8.7-11.7 kg |
| 375-560 mm | 11.7-15.3 kg | |
Belt Tensioning Procedure Using A Belt Tension
Indicator
- Calculate the deflection distance in mm on a basis of 16mm per metre of centre distance.
- Set the lower marker ring at the deflection distance required in mm on the lower scale.
- Set the upper marker ring against the bottom edge of the tube.
- Place the belt tension indicator on top of the belt at the centre of the span, and apply a force at the right angles to the belt deflecting it to the point where the lower marker ring is level with the top of the adjacent belt.
- Read off the force value indicated by the top edge of the marker ring.
- Compare this force to the kgf value in the table above.
- If a Belt Tension Indicator is not available, a spring balance and rule will suffice.
IMPORTANT
After the drive has been running for approximately
30 minutes, the tension should be checked and readjusted to the higher
value, if necessary.