Franklin Electric D Series Close-Coupled Centrifugal Pump

What Is the Franklin Electric D Series Close Coupled Centrifugal Pump?

The Franklin Electric D Series Close Coupled Centrifugal Pump is a rugged and versatile general purpose centrifugal pump designed for commercial, municipal, and light industrial water transfer applications. Available at Ken’s Distributing, the D Series is built with heavy-duty cast iron construction and dynamically balanced impellers, providing reliable flow, low vibration operation, and reduced bearing loads for a long and dependable service life.

What makes the Franklin Electric D Series Close Coupled Centrifugal Pump one of the most popular choices in the Franklin Electric centrifugal pump lineup is its broad range of impeller material options and motor configurations. Depending on the specific model variant, the D Series offers stainless steel, bronze, and cast iron impellers, making it adaptable to a wider range of water conditions and application requirements than most single-material pump series can handle. Combined with both single-phase and three-phase motor options in ODP and TEFC enclosures, the D Series is a practical and flexible pump platform for a wide variety of installations.

Kendisco carries the full Franklin Electric D Series lineup, including multiple model variants, HP sizes, and motor configurations. Whether you need a pump for irrigation, commercial building water supply, municipal water service, or construction site water transfer, the D Series gives you the right combination of durability, performance, and configuration flexibility to get the job done.

Understanding the D Series Model Variants and Impeller Options

One of the features that sets the Franklin Electric D Series Close Coupled Centrifugal Pump apart from other close coupled centrifugal pumps is its range of model variants, each using a different impeller material to match specific application requirements. Here is a breakdown of what each variant offers:

Model Variant	Impeller Material	Best For
DA1A	Stainless Steel	Clean water with corrosion resistance needs
DA1B	Stainless Steel	Clean water, alternative port configuration
DB1	Bronze	Applications requiring non-ferrous impeller
DB1-½	Bronze	Intermediate size with non-ferrous impeller
DB2	Stainless Steel	Higher flow applications with corrosion resistance
DC1-½	Bronze	Larger capacity with non-ferrous impeller
DC2	Stainless Steel	Larger capacity with corrosion resistance
DC4	Cast Iron	Standard duty, cost-effective option for clean water

This range of impeller materials gives the D Series an unusual level of versatility. Stainless steel impellers offer excellent corrosion resistance and strength. Bronze impellers are commonly specified for applications where a non-ferrous impeller is required by code or engineering standards. Cast iron impellers provide a durable and cost-effective option for standard clean water applications. Ken’s Distributing carries all D Series variants and can help you identify the right impeller material for your specific water conditions and application requirements.

Key Features and Benefits of the Franklin Electric D Series Close Coupled Centrifugal Pump

• Heavy-Duty Cast Iron Construction: The cast iron volute and pump housing provide increased durability and strength in demanding commercial, municipal, and light industrial environments.
• Multiple Impeller Material Options: Stainless steel (DA1A, DA1B, DB2, DC2), bronze (DB1, DB1-½, DC1-½), and cast iron (DC4) impellers are available depending on the model variant, offering flexibility to match different water conditions and application specifications.
• Dynamically Balanced Impellers: All D Series impellers are dynamically balanced to reduce radial bearing loads, minimize vibration, and extend bearing life for smooth, long-lasting operation.
• Carbon and Ceramic Mechanical Seal: The standard mechanical seal features carbon and ceramic sealing faces with nitrile elastomers and 300 series stainless steel components for dependable, leak-free operation.
• 56C Frame Motor with Shaft Coupling (½ to 2 HP): Smaller HP models use a 56C frame motor with a shaft coupling design that allows the motor to be removed quickly for servicing without affecting the pump’s plumbing connections.
• JM Frame Motor with Shaft Sleeve Protection (Larger HP): Larger HP models use a JM frame motor with a shaft sleeve and O-ring design that protects the motor shaft from wear and extends the service life of the pump assembly.
• Single-Phase and Three-Phase Motor Options: The D Series is available with both single-phase and three-phase motors, allowing installation in residential, commercial, and industrial electrical environments.
• ODP and TEFC Motor Enclosures: Select Open Drip Proof for clean, dry indoor installations or Totally Enclosed Fan Cooled for outdoor, dusty, or humid conditions.
• 3600 RPM Motor Speed: The listed models operate at 3600 RPM for strong flow and pressure output from a compact close coupled configuration.
• General Purpose Versatility: The broad range of impeller materials, motor options, and HP sizes makes the D Series one of the most versatile general purpose close coupled centrifugal pump platforms in the Franklin Electric lineup.

Technical Specifications

Specification	Detail
Available HP (Listed Models)	½ HP, ¾ HP, 1 HP
Phase Options	Single-Phase and Three-Phase
Voltage (Single-Phase)	115 VAC / 230 VAC
Voltage (Three-Phase)	208-230 VAC / 460 VAC
Motor Speed	3600 RPM
Motor Frame (½ to 2 HP)	56C with Shaft Coupling
Motor Frame (Larger HP)	JM with Shaft Sleeve and O-Ring
Motor Enclosure Options	ODP or TEFC
Pump Design	Close Coupled
Volute Material	Cast Iron
Impeller Materials Available	Stainless Steel, Bronze, or Cast Iron (varies by model variant)
Mechanical Seal	Carbon/Ceramic, Nitrile Elastomers, 300 Series Stainless Steel
Suction x Discharge (DA1A Listed)	1-¼ x 1 inch

Order Information

DA1A    1-1/4″ x 1″    3600 RPM

DA1A    1-1/4″ x 1″   1800 RPM

DA1B    1-1/4″ x 1″    3600 RPM

DA1B    1-1/4 x 1    1800 RPM

DB1    1-1/2 x 1    3600 RPM

DBL1    1-1/2 x 1    1800 RPM

DB1-1/2    2 x 1-1/2    3600 RPM

DBL1-1/2    2 x 1-1/2    1800 RPM

DC1-1/2    2 x 1-1/2    3600 RPM

DCL1-1/2    2 x 1-1/2    1800 RPM

DB2/DC2    3 x 2    3600 RPM

DBL2    3 x 2    1800 RPM

DC4    4 x 4    3600 RPM

D Series vs. Other Franklin Electric Close Coupled Centrifugal Pumps

The Franklin Electric close coupled centrifugal pump lineup includes several series, each optimized for different applications and levels of demand. Here is how the Franklin Electric D Series Close Coupled Centrifugal Pump compares to the other key options:

Feature	D Series	DR Series	FAC Series	AG Series
Key Differentiator	Multiple impeller materials, general purpose versatility	Customizable materials, stainless volute option, factory wet tested	212°F max temp, hot water and general service	9-pump family, 65-900 GPM, agricultural focus
Impeller Material Options	Stainless Steel, Bronze, or Cast Iron	Thermoplastic or Stainless Steel	Stainless Steel	CA6NM Stainless Steel
Model Variants	8 variants (DA1A, DA1B, DB1, DB1-½, DB2, DC1-½, DC2, DC4)	Standard and DR1 stainless volute	3 HP and 5 HP	9-pump family
Motor Frame	56C (½-2 HP) and JM (larger HP)	56C and 56J	JM	JM and JP
Bronze Impeller Option	Yes	No	No	No
Best For	General purpose commercial, municipal, light industrial with impeller material flexibility	Custom-configured applications, jockey pump, specialized fluids	Hot water circulation, general service, boosting	Agricultural irrigation, municipal, high-flow industrial

The D Series is the best choice when you need a general purpose close coupled centrifugal pump with the flexibility to choose between stainless steel, bronze, or cast iron impellers to match your specific water conditions. It is also the only Franklin Electric close coupled series that offers a bronze impeller option, which is often specified in applications where non-ferrous materials are required by code. For high-flow agricultural applications, the AG Series is better suited. For hot water or high-temperature applications, the FAC Series is the right option. For maximum customization including stainless steel volutes, the DR Series is the way to go. Not sure which is right for your project? Ken’s Distributing is here to help you decide.

Applications: Where Is the Franklin Electric D Series Close Coupled Centrifugal Pump Used?

The Franklin Electric D Series Close Coupled Centrifugal Pump is designed to be a dependable general purpose pump for a wide range of water transfer and distribution applications. Here are the most common uses:

• Irrigation Systems: The D Series works well for commercial and agricultural irrigation systems that need reliable flow and pressure from a compact, close coupled pump platform. Stainless steel impeller variants handle variable water quality better than standard cast iron models.
• Commercial Building Water Supply: Used in commercial buildings for water distribution, pressure maintenance, and general water supply applications where consistent performance is needed.
• Construction Site Water Transfer: The heavy-duty cast iron construction and easy serviceability make the D Series a practical choice for temporary and permanent construction site water supply and transfer needs.
• Municipal Water Services: Suitable for municipal water supply, distribution, and service applications where long service life, low maintenance, and reliable operation are priorities.
• Light Industrial Operations: Works well for process water supply, cooling water transfer, and general light industrial water handling tasks. Bronze impeller variants meet non-ferrous material requirements common in certain industrial codes and standards.
• Pressure Boosting: The D Series can serve as a booster pump for systems needing additional pressure from storage tanks, municipal supply lines, or other low-pressure sources.

Installation and Maintenance Details

The Franklin Electric D Series Close Coupled Centrifugal Pump is designed for practical installation and straightforward long-term maintenance. Here is what you need to know:

• 56C Frame Motor with Shaft Coupling (½ to 2 HP): The shaft coupling design on smaller HP models allows the motor to be removed quickly for servicing, seal replacement, or motor swap without disconnecting the pump from the piping system.
• JM Frame Motor with Shaft Sleeve and O-Ring (Larger HP): Larger HP models use a JM frame motor with a shaft sleeve and O-ring design that protects the motor shaft from wear and extends the service life of the entire pump assembly.
• Motor Enclosure Options: Choose ODP for clean, dry indoor installations, or TEFC for outdoor, dusty, or humid environments. Both enclosure types are available across the D Series lineup.
• Phase and Voltage Options: Single-phase models are available in 115/230 VAC for residential and light commercial use. Three-phase models operate on 208-230/460 VAC for commercial and industrial installations.
• Mechanical Seal: The carbon and ceramic mechanical seal with nitrile elastomers and 300 series stainless steel components provides reliable, leak-free operation under standard operating conditions.
• Impeller Selection: Choosing the right impeller material at the time of purchase is important. Stainless steel is ideal for corrosive water, bronze is required in many non-ferrous applications, and cast iron is the most cost-effective option for clean, neutral water. Ken’s Distributing can advise on the best impeller material for your water quality and application.

For questions about motor selection, impeller material options, or installation configuration, contact the team at Ken’s Distributing. We are here to make sure your D Series pump is set up correctly for your specific application.

Compatible Replacement Parts and Accessories

Keeping your Franklin Electric D Series Close Coupled Centrifugal Pump running at peak performance means using genuine Franklin Electric replacement parts. Kendisco stocks a comprehensive range of compatible parts and accessories for the D Series, including:

• Mechanical seal replacement kits (carbon/ceramic, nitrile, 300 SS)
• Stainless steel, bronze, and cast iron impeller assemblies
• Shaft sleeve replacements (JM frame models)
• Shaft coupling components (56C frame models)
• Gasket and O-ring kits
• Bearing replacements
• Motor replacement components

Using genuine Franklin Electric parts protects your pump investment and warranty, and ensures the D Series continues to perform at its designed specifications. Browse the full selection of Franklin Electric replacement parts available at Kendisco today.

View Franklin Electric Replacement Parts at Ken’s Distributing

Frequently Asked Questions About the Franklin Electric D Series Close Coupled Centrifugal Pump

What impeller material options are available for the D Series?

The Franklin Electric D Series Close Coupled Centrifugal Pump offers three impeller material options depending on the model variant. Stainless steel impellers are available on the DA1A, DA1B, DB2, and DC2 variants. Bronze impellers are available on the DB1, DB1-½, and DC1-½ variants. A cast iron impeller is available on the DC4 variant. Ken’s Distributing carries all D Series model variants and can help you choose the right impeller material for your application.

What is the difference between the D Series and the DR Series?

Both the D Series and the DR Series are close coupled centrifugal pumps from Franklin Electric, but they serve different needs. The D Series focuses on offering multiple impeller material choices including stainless steel, bronze, and cast iron across eight model variants. The DR Series focuses on overall material customization including a stainless steel volute option (DR1), thermoplastic or stainless steel impellers, customizable seal materials, and factory wet testing. The D Series is the better choice for general purpose pumping where impeller material selection is the key consideration. The DR Series is the better choice when you need to customize the volute, seal, and impeller materials together for a specialized application.

Why would I choose a bronze impeller over stainless steel?

Bronze impellers are commonly specified in applications where non-ferrous materials are required by engineering standards or building codes. This is common in certain municipal, marine, and industrial applications. Bronze is also naturally resistant to dezincification and certain types of water-based corrosion. If your application does not have a specific non-ferrous requirement, stainless steel is generally the stronger and more broadly suitable option. Contact Ken’s Distributing for guidance on impeller material selection.

What HP options are available for the D Series?

The currently listed DA1A models of the Franklin Electric D Series Close Coupled Centrifugal Pump are available in ½ HP, ¾ HP, and 1 HP configurations. The broader D Series family supports additional HP options across its eight model variants. Kendisco can help you find the right HP and model variant for your application requirements.

What motor frame types does the D Series use?

The Franklin Electric D Series Close Coupled Centrifugal Pump uses two different motor frame designs depending on HP. Models from ½ to 2 HP use a 56C frame motor with a shaft coupling for easy motor removal and servicing. Larger HP models use a JM frame motor with a shaft sleeve and O-ring design that protects the motor shaft from wear. Both designs are NEMA standard for broad motor compatibility.

Can the D Series be used for municipal water supply?

Yes. The Franklin Electric D Series Close Coupled Centrifugal Pump is commonly used in municipal water supply, distribution, and service applications. The cast iron construction, mechanical seal, and range of impeller material options make it a reliable and versatile choice for municipal infrastructure needs.

What is the difference between the D Series and the AG Series?

The D Series is a general purpose close coupled centrifugal pump with multiple impeller material options (stainless steel, bronze, cast iron) across eight model variants. The AG Series is a high-flow agricultural pump family with nine configurations covering 65 to 900 GPM, using CA6NM stainless steel impellers and supporting both 1800 and 3600 RPM motor speeds. The D Series is ideal for general commercial and municipal use with material flexibility. The AG Series is designed for high-volume agricultural, municipal, and industrial applications that require greater flow capacity.

Where can I buy the Franklin Electric D Series Close Coupled Centrifugal Pump?

You can purchase the Franklin Electric D Series Close Coupled Centrifugal Pump directly from Ken’s Distributing at Kendisco.com. Our team is ready to assist with model variant selection, impeller material guidance, motor configuration options, compatible replacement parts, and any technical questions about the D Series pump.

Related Products at Ken’s Distributing

• Franklin Electric DR Series Close Coupled Centrifugal Pump – Customizable close coupled pump with stainless steel volute option and factory wet testing
• Franklin Electric AG Series Close Coupled Centrifugal Pump – High-flow agricultural close coupled pump covering 65 to 900 GPM
• Franklin Electric FAC Series Close Coupled Centrifugal Pump – General service close coupled pump with 212°F max temp for hot water applications
• Franklin Electric HC Series Close Coupled Centrifugal Pump – Heavy-duty ductile iron close coupled pump for demanding commercial and industrial use
• Franklin Electric XS Series Close Coupled Centrifugal Pump – Close coupled centrifugal pump for irrigation, commercial, and construction applications
• Franklin Electric Replacement Parts – Genuine OEM parts for all D Series models, available at Kendisco