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Flowserve GR Series Double Helical Rotary Gear Pump

The Flowserve GR Series Double Helical Rotary Gear Pump is a heavy duty positive displacement rotary gear pump designed for smooth handling of viscous liquids in industrial process applications. Built with a between bearing design and double helical herringbone gears, the GR Series supports stable, pulse free flow for oil circulation, petrochemical transfer, filtration systems, asphalt, grease and other viscous fluid applications.

This pump is suitable for users who require reliable viscous liquid transfer, circulation and process pumping performance. For technical selection or quotation, contact us with your required flow rate, pressure, temperature, viscosity and application details.

Key Features and Benefits

• Double helical herringbone gear design: Supports smooth and pulse free flow for viscous liquid handling.
• Between bearing construction: Helps reduce shaft deflection and supports stable pump operation.
• Positive displacement operation: Provides consistent flow for transfer and circulation duties.
• Self priming capability: Suitable for selected process transfer applications where priming support is required.
• Low NPSHR design: Helps improve suction performance when correctly selected.
• Packing or mechanical seal options: Allows configuration based on process and sealing requirements.
• Back pullout design: Supports easier maintenance access without major piping disturbance.

Technical Specifications of Flowserve GR Series

Specification	Details
Brand	Flowserve
Series	GR Series
Pump type	Positive displacement rotary gear pump
Gear design	Double helical herringbone gear
Construction	Between bearing design
Flow rate	Up to 275 m3/h, 1200 gpm
Operating pressure	Up to 35 bar, 500 psi
Temperature range	Up to 350°C, 650°F
Speed	Up to 1800 rpm
Viscosity	Up to 20,000 cP, subject to model and application review
Size range	40 mm to 200 mm, 1.5 inch to 8 inch
Configurations	GR, GRW, GRH
Sealing options	Packing or mechanical seal
Available options	Direct V belt drive, jacketed body, extra deep jacketed stuffing box, babbitted carbon sleeve bushing, INSUROCK wearplates, integral safety relief valve

Note: Technical values may vary depending on pump size, configuration, liquid properties and operating conditions. Please contact us for proper pump selection and quotation.

Industrial Applications for Viscous Liquid Handling

• Oil circulation
• Petrochemical blending and transfer
• Filtration equipment
• Food and beverage processing
• Asphalt and tar transfer
• Grease transfer
• OEM equipment
• Pulp and paper
• Marine service
• Power generation and utility service

Request a Quotation

Need help selecting the right Flowserve GR Series Gear Pump? Contact us with your liquid type, flow rate, pressure, temperature, viscosity, existing pump model if available and operating condition. Our team can assist with technical selection and quotation based on your application.

 

Frequently Asked Questions

What is the Flowserve GR Series Gear Pump used for?

The Flowserve GR Series is used for transferring and circulating viscous liquids in applications such as oil circulation, petrochemical transfer, filtration systems, asphalt handling, grease transfer and general process duties.

Is the Flowserve GR pump suitable for high viscosity liquids?

Yes, the GR Series is designed for viscous liquid handling. Final suitability depends on liquid type, viscosity, temperature, pressure and flow requirement.

Can the Flowserve GR pump be supplied with mechanical seals?

Yes, the GR Series can be configured with packing or mechanical seal options depending on process requirements.