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WITTE PUMPS & TECHNOLOGY GmbH
Poly at Polymer discharge pumps

Poly at Polymer discharge pumps

Product catalog summary

Overview
The document presents the POLY-AT, an advanced discharge gear pump designed for polymer processing, emphasizing its new design for enhanced efficiency.

Operating Parameters

Viscosity: Up to 40,000 Pas
Temperature: Up to 350 °C
Suction Pressure: Vacuum up to 15 bar
Differential Pressure: Up to 250 bar/300 bar with square gear design

Technical Specifications

Housing: Stainless steel, optional carbon steel with coatings
Gears: Nitrited steel, optional tool or special steel with coatings
Bearings: Tool steel, optional Al-bronze, NiAg, or special materials with coatings
Seals: Vacuum viscoseal with buffered stuffing box, optional buffered mechanical seal
Heating: Heat transfer oil, optional steam

Design Features and Benefits

Smaller pump size with higher capacity, aiding in debottlenecking existing lines
Higher capacity per revolution due to new gear geometry and wider gears
Increased efficiency with smaller gear center distance
Optimization leads to higher performance in a compact design
Larger inlet geometry reduces NPSHR, benefiting various applications

Performance Data

Specific discharge volume and capacity vary with gear center distance and width
Reduced temperature rise and improved heat dissipation
Increased capacity with wide viscosity and flow rate ranges

Efficiency Improvements

Redesign of clearances and specific flow rate increases volumetric efficiency
Reduced minimum pump speed allows for a wider throughput range
Wider gears optimize inlet geometry, reducing pressure loss and required inlet pressure

Contact Information
WITTE PUMPS & TECHNOLOGY GmbH, Tornesch, Germany, with global offices in Russia, China, USA, and Malaysia. For more information, visit www.witte-pumps.com.

Catalog excerpts

Advanced rOLT " A I Technology Discharge gear pump for polymer processing. New design for more efficiency.

Open the catalog to page 1

POLY- AT Three Design Features Advanced Technology Higher capacity per revolution due to a new gear geometry and wider gears. Increased efficiency due to new gear geometry with smaller gear center distance. Smaller pump size capable of handling higher capacities therefore allowing debottleneck of existing lines. Technical specification Operating parameters Stainless steel Housing optional: Carbon steel Coatings Nitrited steel Viscosity Temperature Suction pressure Differential pressure **with square gear design (gear width = center distance) optional: Tool steel Special steel Coatings Tool...

Open the catalog to page 2

* The values depend on the flow to be supplied and process conditions. Maximum values, under circumstances, must not occur at the same time. Dimensions The wider gears allow for optimum inlet geometry due to the modified relation of length to width, which reduces the pressure loss and in this way, minimizes the required inlet pressure or necessary liquid column (NPSHr). The residence time of the polymer can be significantly shortened. The redesign of the clearances as well as eye-striking change of the specific flow rate related to the gap sizes results in a considerable increase of the volumetric efficiency....

Open the catalog to page 3

WITTE PUMPS & TECHNOLOGY GmbH Tornesch, Germany OOO WITTE PUMPS & TECHNOLOGY Moscow, Russia WITTE PUMPS & TECHNOLOGY Shanghai Ltd., China WITTE PUMPS & TECHNOLOGY LLC Lawrenceville, GA, USA WITTE PUMPS & TECHNOLOGY Kuala Lumpur, Malaysia WITTE PUMPS & TECHNOLOGY GmbH Lise-Meitner-Allee 20 D-25436 Tornesch / Hamburg / Germany WITTER PUMPS & TECHNOLOGY

Open the catalog to page 4

Poly at Polymer discharge pumps

Poly at Polymer discharge pumps

Catalog excerpts

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