Gap-Free Gear Pump Conveys Rigid PVC Without Polymer Build-Up

Polymer Extrusion Gap-Free Gear Pump Conveys Rigid PVC Without Polymer Build-Up

2026-08-21 Source: Press release Maag 1 min Reading Time

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MAAG GmbH

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The flow-optimized design of the gear pump prevents polymer deposits and their thermal degradation when handling rigid PVC. Through pressure-stable conveying, the energy consumption of the overall system can be reduced by up to 20 percent while simultaneously relieving the extruder.

Maag’s Extrex6 EC gear pump is specifically designed for the continuous conveying of rigid PVC (polyvinyl chloride).(Source: Maag) — Maag’s Extrex6 EC gear pump is specifically designed for the continuous conveying of rigid PVC (polyvinyl chloride).
(Source: Maag)

Maag’s Extrex⁶ EC gear pump is specifically designed for the continuous conveying of rigid PVC (polyvinyl chloride). Due to its high thermal sensitivity and tendency to degrade under prolonged heat exposure, rigid PVC is considered a demanding material to process.

In conventional gear pumps, material often remains in gaps and dead spaces. In practice, this can lead to deposits, thermal damage to the polymer, and process instability. To address this issue, the Extrex⁶ EC features a gap-free design without dead spaces. This prevents polymers from adhering to and accumulating inside the pump, reducing the thermal stress on the PVC and the risk of degradation.

The pump delivers a uniform and pressure-stable flow, thereby relieving the extruder. Depending on the application, this can increase material throughput or reduce energy consumption by up to 20 %. The temperature increase across the pump is not higher than 6 K. Combined with a reduction of up to 10 °C in the overall process temperature, the thermal load on the melt processing operation is reduced, potentially allowing for a lower requirement for thermal stabilizers in the formulation.

Fakuma 2026: Hall A6, Stand 6202

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