Gear pump for rubber applications

Product catalog summary

Overview: This document provides detailed specifications and applications for high precision gear pumps designed specifically for rubber applications. These pumps are used for metering and pressure generation tasks, offering reliable solutions for increasing capacity and improving the dimensional stability of extruded profiles.

Specifications:

Housing: Made from alloy steel with options for stainless steel.
Gears: Constructed from through-hardened and nitrided H13 tool steel.
Friction Bearings: Made from through-hardened D2 tool steel, with optional materials available.
Shaft Seal: Viscoseal, with other materials as options.
Heating/Cooling: Features jacketed pump housing and tempered gearshafts for use with pressurized hot water systems.

Operational Parameters:

Viscosity: Up to 30,000 Pas.
Temperature: Up to 160°C (320°F), specifically 80°C (176°F) to 110°C (230°F) for rubber.
Suction Pressure: Up to 120 bar (1,740 psig).
Differential Pressure: Up to 250 bar (3,626 psig), with high pressure design up to 350 bar (5,076 psig).
Discharge Pressure: Up to 350 bar (5,076 psig), with high pressure design up to 450 bar (6,526 psig).

Applications: Suitable for various rubber compounds such as EPDM, CR, NR, NBR, SBR, NR FPM, BR, and others. The pumps are designed to enhance productivity and efficiency in rubber extrusion processes.

Gear Design:

Spur Gears: Standard for rubber pumps, offering reduced pulsation and a self-wiping design.
Helical Gears: Provide optimized temperature profiles across rubber flow.
Herringbone Gears: Offer the lowest pulsation and no axial thrust, ensuring best volumetric efficiency.

Advantages:

Flexible for various products like hoses, sheets, and tubes.
Reduced pressure on rubber extruders for higher throughput.
Independent control of extruder head pressure.
Handles higher discharge pressure with minimal temperature rise.
Accurate metering for improved product control.
Increases productivity of existing lines.

Optional Equipment: Includes frame drive gear box and other accessories to enhance functionality.

Contact Information: WITTE PUMPS & TECHNOLOGY LLC, 1305 Lakes Parkway, Suite 128, Lawrenceville, GA 30043, USA. Phone: +1-678-225-0108, Email: [email protected], Website: www.witte-pumps.us

Catalog excerpts

GEAR PUMPS Rubber Application high precision gear pump for metering and pressure generation tasks

Open the catalog to page 1

Made For Rubber Applications Gear pumps provide a reliable means to increase capacity of existing lines, improve the dimensional stability of extruded profiles, efficiently build high pressure required for strainer applications and provide an excellent return on investment. The benefits of gear pump assisted extrusion are well known for thermoplastic applications and many of the same benefits can be realized for rubber. The key to a successful rubber pump installation is the correct pump design and pump size selection. Witte’s ability to provide proven solutions for the rubber industry and our...

Open the catalog to page 2

Special Gear Design Helical Gear Design • standard for rubber pumps • reduced pulsation (compared to spur gears) • self wiping design Spur Gear Design • standard for high pressure gear pumps • best volumetric efficiency • no axial thrust Herringbone Gear Design • lowest pulsation • no axial thrust • optimized temperature profile across rubber flow Example: comparison of pulsation Spur gears Helical gears Herringbone gears: comparison of pulsation Herringbone gears

Open the catalog to page 3

Advantages Advantages of Gear Pump Assisted Rubber Extrusion Reduced pressure on the rubber extruder allows the rubber extruder to operate more efficiently and at higher throughput Ability to control extruder head pressure as an independent process parameter with control system Able to handle higher discharge pressure with less temperature rise for straining and high pressure applications Accurate metering of rubber compound to downstream equipment giving improved control on the final product Handle operating conditions which have not been possible previously Increase productivity of existing...

Open the catalog to page 4

Designed for Rubber Pump Cross Section Pressure monitoring for inlet and discharge sides Temperature measurement of housing Shaft Cooling System Drive Shaft Cooled shafts to avoid excessive heat Driven Shaft Viscoseal depending on the sensitivity of the rubber the pump can be designed so that product from the bearings can be recirculated back to the pump inlet or can be bled out to atmosphere Temperature measurement of endplates Example Rubber Application Die Head Screen changer or breaker plate Gear pump for pulsation free rubber transfer Special inlet port design for constant material flow...

Open the catalog to page 5