Abrebolsa SPR

Bag Opener SPR. Single Shaft Pre-Shredder.

Pre-shredder designed and manufactured by SPR Group, has certified bag opening efficiency of 98%.

Equipment designed specifically to make the work of bag opening in MSW plants and/or light packaging plants, facilitating the downstream phases of material recovery.

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Specific equipment with slow rotation single shaft to open and tear the material

Basic Characteristics:

Axis: Single-rotor + fixed comb
Step adjustment: Comb-rotor distance adjustment
Speed: Adjustable by frequency inverter
Drive: Electric

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Operating Principle

The material falls on a rotor that incorporates blades placed in a helicoidal way.

The rotor is driven by an electric motor through a V drive belt and a planetary gearbox. The Bag Opener control system incorporates an automatic cleaning cycle. During the cleaning cycle of the Bag Opener, the side gate of the machine automatically opens halfway as the rotor rotates forward expelling the interfering material.


The equipment incorporate a new design of interchangeable blades.

The axis of slow rotation (from 5 to 8 r.p.m) conduct the material through static blades (or counter-blades).

The blades of the rotor and the blade holder are manufactured with an extremely wear-resistant layer and easily reused without having to replace them.

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MSW– Municipal Solid Waste
LP– Light Packaging
RDF– Residue Derived Fuel
MOSW – Municipal Organic Solid Waste
Medical Waste



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