GNA6-1-1 / 4

Burks Series GNA6-1-1/4 Base Mounted Centrifugal Pumps are available in 1750 RPM, with capacities to 1100 GPM, heads to 95 feet; and in 3500 RPM with capacities to 950 GPM, heads to 380 feet. The base mounted pump models are rated for use on inlet pressure to 100 PSI and in case working pressures to 200 PSI, with suction sizes from 1 ½" to 5", and discharge sizes from 1 ¼" to 4".

Burks GNA6-1-1/4 Series Frame-Mounted Centrifugal Pumps

Rugged Frame-Mounted Design for Reliable Fluid Handling

The Burks GNA6-1-1/4 Series frame-mounted centrifugal pumps are engineered to provide dependable performance in commercial, industrial, municipal, and process water applications. Combining a heavy-duty power frame with Burks' proven hydraulic design, this series delivers reliable operation, simplified maintenance, and long service life in demanding environments.

Designed for continuous-duty service, the GNA6-1-1/4 Series is an excellent choice for water circulation, pressure boosting, liquid transfer, cooling systems, and industrial process applications. Its frame-mounted construction provides enhanced durability and serviceability for facilities seeking long-term operational reliability.

Key Features

• Frame-mounted end suction centrifugal pump design

• Heavy-duty bearing frame for extended equipment life

• Back pull-out construction allows maintenance without disturbing piping

• Radial split casing provides strength and serviceability

• Enclosed bronze impeller for efficient hydraulic performance

• Self-adjusting mechanical shaft seal for dependable sealing

• Replaceable casing wear ring helps reduce maintenance costs

• Stainless steel shaft for corrosion resistance and durability

• Centerline discharge reduces piping stress

• Factory tested for performance and reliability

• Available in bronze-fitted, all-bronze, and all-iron construction options

Performance and Connection Sizes

The GNA6-1-1/4 Series is designed to deliver dependable performance across a wide range of commercial and industrial pumping applications.

Performance Highlights

• Capacities up to 200 GPM

• Heads up to 95 feet at 1750 RPM

• Heads up to 380 feet at 3500 RPM

• Horsepower ranges from 1 HP to 15 HP

• 2" suction connection

• 1-1/4" discharge connection

• Maximum liquid temperatures up to 225°F with standard seals

• Inlet pressures up to 100 PSI

• Casing working pressures up to 200 PSI

• Available in 1750 RPM and 3500 RPM configurations

• Designed for continuous-duty operation

The 2-inch suction connection helps maximize inlet efficiency and reduce turbulence, while the 1-1/4-inch discharge connection delivers dependable pressure performance for circulation, transfer, and booster applications.

NPT Threaded and Flanged Connection Options

The GNA6-1-1/4 Series is available in configurations that accommodate a variety of piping systems and installation requirements.

NPT Threaded Connections

Threaded models provide an economical and compact solution for commercial facilities, OEM equipment, and general industrial applications.

Benefits of NPT Connections

• Lower installation costs

• Compact piping layout

• Simplified maintenance and replacement

• Easy integration into existing systems

• Ideal for packaged equipment and commercial applications

• Reduced installation complexity

Flanged Connections

Flanged models are ideal for larger systems that demand secure pipe alignment, greater support, and easier maintenance access.

Benefits of Flanged Connections

• Improved piping support and alignment

• Easier pump removal during maintenance

• Enhanced reliability in larger systems

• Ideal for industrial, municipal, and institutional facilities

• Simplifies long-term service and equipment replacement

Built for Easy Maintenance

The GNA6-1-1/4 Series incorporates Burks' proven back pull-out design, allowing maintenance personnel to remove the rotating assembly without disconnecting piping. This significantly reduces downtime and labor costs while simplifying routine service procedures.

The replaceable casing wear ring protects critical hydraulic surfaces from wear, helping maintain pump efficiency and extend equipment life.

Optional High-Temperature Service

For applications involving hot water, heat transfer fluids, and thermal oils, select GNA6-1-1/4 models are available with a Jacketed Seal Cavity design. This feature helps protect the mechanical seal in elevated-temperature applications and can significantly extend seal life under demanding conditions.

Typical Applications

• HVAC heating and cooling systems

• Chilled water circulation

• Cooling tower systems

• Water transfer and distribution

• Industrial process water systems

• Pressure boosting applications

• Manufacturing facilities

• Commercial building services

• Municipal water systems

• Irrigation applications

• General industrial fluid handling

Why Choose the Burks GNA6-1-1/4 Series?

The Burks GNA6-1-1/4 Series combines the durability of a frame-mounted design with the hydraulic efficiency and reliability that Burks pumps are known for. With capacities up to 200 GPM, horsepower options up to 15 HP, and a maintenance-friendly back pull-out construction, this series provides an ideal solution for facilities seeking dependable performance, reduced downtime, and long-term value.