Screw pumps for challenging applications

The basic design of the pump is built around two screws - a drive screw and an idler screw.

During pump operation, these integral shaft screws are engaged and form a sealed cavity with the surrounding pump housing.

The pumped liquid is transported axially as the screw shafts turn and is conveyed in a consistent and pulseless flow to the pump discharge port.

Since hydraulic forces on the two screws are balanced, there is little or no hydraulic stress on the screws, promoting maximum life of the internal pump parts, Maag says.

According to Maag, its S Series pumps provide numerous advantages over conventional technologies.

These include:

• ATEX-certified for use in explosive or dangerous environments.
• Self priming capability, good suction performance
• Excellent speed/output linearity
• Low pulsation
• Constant flow even at considerably different pressures and volumes
• Compact footprint and ease of maintenance

What’s more, Maag says twin-screw pumps can be a good option for conveying challenging multiple-phase fluids containing oil, gas, and water in the oil and gas production sector.

In a variant of the S Series, the twin screw pumps employ timing gears to transmit the power from the power screw shaft to the idler screw shaft to reduce the possibility of wear when pumping abrasive materials, or where special materials of construction dictate non contacting operation.

For more information about Maag’s S Series range, please visit: http://www.maag.com/en/