4GNB9-4F

Burks Series 4GNB9-4F 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 4GNB9-4F Series Frame-Mounted Centrifugal Pumps

High-Capacity Flanged Pumps for Demanding Industrial Applications

The Burks 4GNB9-4F Series frame-mounted centrifugal pumps are engineered for high-volume fluid handling in commercial, industrial, municipal, and institutional systems. Built with a rugged base-mounted design and heavy-duty power frame, these pumps deliver the reliability, serviceability, and hydraulic performance required for demanding continuous-duty applications.

Designed for large-scale water circulation, transfer, pressure boosting, cooling systems, and process operations, the 4GNB9-4F Series combines robust construction with easy maintenance access to help reduce downtime and maximize operating efficiency.

Key Features

• Heavy-duty frame-mounted end suction centrifugal pump design

• Large flanged suction and discharge connections

• Rugged radial split casing construction

• Back pull-out design allows maintenance without disconnecting piping

• Centerline discharge reduces system stress and promotes proper alignment

• High-efficiency enclosed bronze impeller

• Replaceable casing wear ring extends pump life and preserves efficiency

• Mechanical shaft seal for dependable leak protection

• Bronze shaft sleeve helps protect against wear and corrosion

• Heavy-duty grease-lubricated bearings for extended service life

• Factory tested for reliable hydraulic performance

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

Performance and Connection Sizes

The 4GNB9-4F Series is designed for high-flow applications requiring substantial capacity and dependable system performance.

Performance Highlights

• Capacities up to 1,100 GPM

• Heads up to 380 feet

• Horsepower ranges from approximately 5 HP to 60 HP

• 5" flanged suction connection

• 4" flanged 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 models

• Continuous-duty industrial operation

The oversized 5-inch suction flange helps maximize hydraulic efficiency by reducing inlet losses, while the 4-inch discharge flange supports the high flow rates necessary for large commercial and industrial fluid-handling systems.

Flanged Connections for Large System Reliability

The 4GNB9-4F Series is built around a fully flanged connection design, making it an ideal choice for high-capacity piping systems where strength, alignment, and ease of maintenance are critical.

Benefits of Flanged Connections

• Improved piping support and system stability

• Better alignment in large-diameter piping systems

• Easier pump removal and installation during maintenance

• Enhanced reliability in continuous-duty applications

• Reduced stress on pump nozzles and piping connections

• Ideal for large HVAC, industrial, and municipal systems

• Simplifies future upgrades and equipment replacement

Designed for Easy Maintenance

The Burks 4GNB9-4F Series incorporates a proven back pull-out design that allows maintenance personnel to access the rotating assembly without removing the casing or disconnecting piping. This significantly reduces downtime and simplifies routine service procedures.

Wide-spaced bearings provide solid shaft support for smooth operation, while the replaceable casing wear ring protects critical components from wear and helps maintain long-term hydraulic efficiency.

Durable Construction for Long-Term Service

Engineered for challenging operating conditions, the 4GNB9-4F Series features robust materials and precision-machined components throughout the pump assembly. The enclosed bronze impeller is hydraulically balanced for efficient, vibration-free operation, while premium sealing and bearing systems help ensure dependable performance year after year.

Typical Applications

• HVAC heating and cooling systems

• Chilled water circulation

• Cooling tower systems

• Industrial process water

• Water transfer and distribution

• Municipal water systems

• Pressure boosting stations

• Manufacturing facilities

• Institutional and campus infrastructure

• Utility and public works projects

• General industrial fluid handling

Why Choose the Burks 4GNB9-4F Series?

The Burks 4GNB9-4F Series is built for facilities that require maximum flow capacity, dependable operation, and simplified maintenance. With capacities up to 1,100 GPM, large 5" × 4" flanged connections, rugged frame-mounted construction, and proven Burks engineering, this series delivers the performance and reliability needed for demanding commercial and industrial pumping applications. Whether serving a cooling tower, water distribution network, or industrial process system, the 4GNB9-4F Series is designed to provide exceptional long-term value.