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PolyVee Belts (multi-rib belts)


Only PolyVee belts with flexible traction carriers may be used in conveyors. These belts are sufficiently flexible and simplify installation. The flexibility of the traction carrier makes it possible to overcome hole tolerances in the side profile and to use the PolyVee belt in curves.

PolyVee belts offer significant benefits over round belts. With up to 300 % higher torque transmission, the drive power is transmitted evenly to all conveyor rollers. This means that shorter acceleration and braking paths are possible.

PolyVee belts also permit reliable accumulation in curves. Thanks to the belt's outstanding torque transmission, the material to be transported start up again, irrespective of whether or not they have come to a standstill on a drive.

The PolyVee belt works in the same way on rising and falling conveyors. Here the even torque transmission to all conveyor rollers is especially important with the result that the material to be transported retains as large a driven contact area as possible. Reliable conveyors can be constructed in conjunction with PVC sleeve-covered tubes.

Thanks to its particularly compact design, the PolyVee head enables the torque transmission to be positioned very close to the profile. This leaves more room for the materials to be transported with the same overall width of conveyor. As the belts do not come into contact with the material to be transported, even very lightweight materials to be transported are not displaced but always run perpendicular to the conveyor rollers.
  • Flexible standard belts, pre-tension 1 to 3 %
  • PJ form; ISO 9982; DIN 7867; Pitch 2.34 mm
  • Belts with up to 4 ribs can be used (2 x 4 ribs + 1 distance groove)
The PolyVee belt is fundamentally only used in conveyors with roller-to-roller drives, as no useful torque transmission can be achieved tangentially.

Roller-to-roller drive

Owing to the higher pre-tension of the PolyVee belt compared with round belts, Interroll recommends the use of an assembly tool to install the conveyor rollers.

PolyVee Belt

The assembly tool considerably simplifies the installation of the belt as the correct distance of the conveyor rollers can be adjusted by hand.

Owing to the serious conveyor force of PolyVee belts, they have to be protected against interference from outside, e. g. by covering or sealing the gap between the conveyor rollers.

Two versions of PolyVee belts are primarily used:
  • Two-ribbed PolyVee belts for the conveyance of materials to be transported under 50 kg and at speeds of 0.6 to 2 m/s. The maximum number of idlers is 20. The material to be transported can also come to a stop on the idlers.
  • Three-ribbed PolyVee belts are used for heavy materials to be transported. Three-ribbed belts fully use the drive power and are also suitable for long conveyors and for inclined sections.

With PolyVee conveyors with more than 15 conveyor rollers, there is a reduction in speed of one revolution per minute with each conveyor roller. There are geometric reasons for this: Owing to the displacement of the neutral fibres in the PolyVee belt, there is a kind of translation from roller to roller under pressure. The reduction in speed is due to the system and is not accompanied by an increase in wear and tear.
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