DF4-1-1 / 4

Burks Series DF4-1-1/4 close coupled 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. These rugged pumps allow maximum pumping temperatures to 225°F; pump models with the optional MJ Jacketed Seal® allow temperatures to 500°F. Burks Series G pumps accept inlet pressure to 100 PSI, case working pressure to 200 PSI, and suction from 1 ½" to 5", with discharge from 1 ¼" to 4".

All Series G Models feature standard construction bronze fitted cast iron, and are also available in all bronze or all iron. Flanged casing is available on 2" and 2 ½" pumps; 3" and 4" pumps are flanged only. And every Burks pump is factory tested to meet stringent Hydraulic Institute standards.

Burks DF4-1-1/4 Series Close-Coupled Centrifugal Pumps

Compact, Efficient Pumps for Commercial and OEM Applications

The Burks DF4-1-1/4 Series close-coupled centrifugal pumps are designed to deliver reliable performance in water transfer, circulation, boosting, and light industrial applications. Combining a compact footprint with efficient hydraulic design, these pumps provide a cost-effective solution for commercial facilities, OEM equipment, irrigation systems, and general-purpose fluid handling applications.

Built for continuous-duty operation, the DF4-1-1/4 Series offers dependable performance, easy installation, and simplified maintenance while maintaining the quality and durability that have made Burks pumps a trusted industry choice.

Key Features

• Close-coupled end suction centrifugal pump design

• Compact footprint for space-saving installations

• Four-position casing for flexible discharge orientation

• Back pull-out construction allows maintenance without disturbing piping

• Enclosed impeller engineered for efficient hydraulic performance

• Mechanical shaft seal with carbon and ceramic sealing faces

• Stainless steel motor shaft for durability and corrosion resistance

• Factory tested for performance and reliability

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

• Continuous-duty motor design with ball-bearing construction

Performance and Connection Sizes

The DF4-1-1/4 Series is ideal for light to medium-duty pumping requirements where dependable performance and installation flexibility are important.

Performance Highlights

• Capacities up to 120 GPM

• Heads up to 55 feet

• Horsepower ranges from 1/3 HP to 2 HP

• 1-1/2" NPT suction connection

• 1-1/4" NPT discharge connection

• Maximum liquid temperatures up to 225°F

• Maximum inlet pressure of 100 PSI

• Maximum casing working pressure of 200 PSI

• Available in 3450 RPM configurations

• Single-phase and three-phase motor options available

The 1-1/2-inch suction connection provides efficient liquid entry into the pump, while the 1-1/4-inch discharge connection delivers dependable flow and pressure for a wide range of applications.

NPT Threaded Connections

The DF4-1-1/4 Series utilizes NPT threaded suction and discharge ports, making installation simple and economical in commercial and industrial piping systems.

Benefits of NPT Connections

• Reduced installation costs

• Compact piping layout

• Easy integration into existing systems

• Simplified pump replacement

• Ideal for packaged equipment and OEM applications

• Lower overall system complexity

Designed for Easy Maintenance

The DF4-1-1/4 Series features Burks' proven back pull-out design, allowing service technicians to access the rotating assembly without disconnecting system piping. This helps reduce downtime and simplifies routine maintenance procedures.

The four-position casing also provides installation flexibility by allowing the discharge port to be oriented to best suit the piping arrangement.

Durable Construction

Built for long-term reliability, the DF4-1-1/4 Series incorporates high-quality materials throughout the pump assembly. The enclosed impeller is dynamically balanced for smooth operation and efficient performance, while the stainless steel shaft helps resist corrosion and wear.

Available material configurations include:

• Bronze-Fitted Cast Iron

• All Bronze

• All Iron

These construction options allow users to select the best material combination for the fluid being handled and the operating environment.

Typical Applications

• Water circulation systems

• HVAC systems

• Booster applications

• Irrigation systems

• Water transfer operations

• Commercial building services

• OEM equipment packages

• Cooling equipment

• Light industrial process water

• General-purpose fluid handling

Why Choose the Burks DF4-1-1/4 Series?

The Burks DF4-1-1/4 Series delivers reliable centrifugal pump performance in a compact, economical design. With flow rates up to 120 GPM, horsepower options from 1/3 HP to 2 HP, and durable Burks construction, this series provides an efficient solution for commercial, OEM, and light industrial applications. Its maintenance-friendly design, flexible installation options, and dependable operation make the DF4-1-1/4 Series an excellent choice for everyday pumping needs.