Zenith PEP-II Series Precision Gear Pump

Optimizing extrusion processes with reduced heat and required torque and the elimination of surging

The Zenith PEP II series are common in extrusion processes. The Zenith gear pump optimizes the extrusion process by allowing the screw to melt and homogenize the polymer. As the pump generates the needed pressure, it relieves the extruder of work; therefore, reducing heat from the shear, lowering the torque required and eliminating surging.

The Pep II pumps are also offered with the Rheoseal. The Rheoseal design includes reverse flights inside the seal chamber, as well as a water channel to cool the polymer and a backup lip seal. The rotating shafts create a mechanical action on the material, which pumps the polymer back into the pump cavity and seals the shaft from the leakage.

Zenith Pumps provides typical drive and control packages, as well as custom systems designed to meet your particular process specifications. Our extensive experience and full engineering capabilities ensure you the best possible solution to your precision extrusion application.

Zenith’s standard extrusion control package provides the basic controls for PEP-II pump systems. The drive consists of a motor and reducer mounted on a common base plate, with speed controlled by a Zenith ZVD digital speed controller. A pressure control system regulates the extruder speed and maintains a constant pressure to the pump inlet. A temperature controller regulates the pump’s electric heaters. Other features available include:

• Discharge pressure indicator
• Pump inlet/discharge flanges
• Pump fluid or steam heat plates
• Heat plates for extreme service
• System mounting carts
• Start-up assistance