Franklin Electric Centrifugal Self priming Frame Mount FTT 20 – 40
The Franklin Electric FTT-20/40 Self-Priming Frame Mount Centrifugal Pump is a high-capacity industrial pump engineered for demanding irrigation, construcFranklin Electric FTT-20/40 Frame Mount Self-Priming Pumption, municipal, and water truck applications where flow rates up to 740 GPM, heads up to 140 feet, and the ability to handle spherical solids in the water are all required in a single reliable package. The FTT-20/40 designation covers three model sizes within the series: FTT-20, FTT-30, and FTT-40, each delivering progressively higher flow capacity from the same rugged cast iron platform. At Ken’s Distributing Company, we stock the FTT series and supply genuine OEM seals manufactured specifically for these models.
What Is the Franklin Electric FTT-20/40 Frame Mount Self-Priming Pump?
The FTT-20/40 is Franklin Electric’s large-capacity self-priming frame mount centrifugal pump series designed for applications that require serious flow volume, the ability to handle water with spherical solids, and the flexibility of belt or direct drive power sources. It sits above the FMIT Series in the Franklin Electric lineup, offering capacities up to 740 GPM and heads up to 140 feet, making it the right choice for large-scale agricultural irrigation, construction dewatering, municipal pumping, and high-volume water truck service.
The model numbers 20, 30, and 40 represent the three size configurations within the series, with each step up providing higher flow capacity for larger applications. All three models share the same cast iron construction, two-vane enclosed impeller design, FKM mechanical seal, and heavy-duty bearing frame.
One detail worth noting for Ken’s Distributing Company customers: the OEM seals for the FTT-20/40 and TT-20/40 models are manufactured by Kendisco, making us your direct source for genuine seal replacements for these specific models when service time comes.
Technical Specifications
| Specification | Value |
|---|---|
| Max Flow Capacity | Up to 740 GPM |
| Max Head | Up to 140 feet |
| Max Working Pressure | 75 PSI |
| Max Temperature | 212 degrees F |
| Rotation | Clockwise when viewed from motor end |
| Connection Type | NPT pipe connections |
| Mounting Orientation | Horizontal |
| Drive Compatibility | Belt drive and direct drive |
Model and Port Sizing
| Model | Suction (inches) | Discharge (inches) |
|---|---|---|
| FTT-20 | 2 | 2 |
| FTT-30 | 3 | 3 |
| FTT-40 | 4 | 4 |
Franklin Electric FTT Exploded Parts
Franklin Electric FTT MATERIALS AND PARTS
| Fig. No. | Part Description | Part No. | Materials | ||
|---|---|---|---|---|---|
| FTT-20 | FTT-30 | FTT-40 | |||
| 1 | FTT Pump Case | 305454001 | 305454002 | 305454003 | Cast iron, ASTM-A48 CL30 |
| 2 | FTT Impeller | 305454004 | 305454005 | 305454006 | Cast iron, ASTM-A48 CL30 |
| 3 | FTT Seal Plate | 305454007 | 305454008 | 305454009 | Cast iron, ASTM-A48 CL30 |
| 4 | FTT Wear Ring | 305454010 | 305454011 | 305454012 | Ductile iron |
| 5 | FTT Shaft | 305454013 | 305454014 | 305454015 | 7M-212SST |
| 16 | FTT Ball Bearing* | 305463034 | 305463035 | 305463036 | Misc. |
| 35 | FTT Shaft Key | 305454016 | 305454017 | 1018 CRS | |
| 38 | FTT Bearing Nut | 305463037 | 305463038 | 305463039 | 300 series stainless steel |
| 39 | FTT Bearing Lock Washer | 305463040 | 305463041 | 305463042 | Zinc-plated steel |
| 72 | FTT Check Valve | 305454018 | 305454019 | 305454020 | Cast iron, ASTM-A48 CL30 |
| 73A | FTT Top Weight, Check Valve | 305454021 | 305454022 | 305454023 | Cast iron, ASTM-A48 CL30 |
| 73B | FTT Bottom Weight, Check Valve | 305454024 | 305454025 | Cast iron, ASTM-A48 CL30 | |
| 75 | FTT T-Handle Fasteners | 305454026 | 305454027 | Cast iron, ASTM-A48 CL30 | |
| 78 | FTT Clean-Out Cover | 305454028 | 305454029 | 305454030 | Cast iron, ASTM-A48 CL30 |
| 79 | FTT Transmission Head | 305454031 | 305454032 | 305454033 | Cast iron, ASTM-A48 CL30 |
| 80 | FTT Bearing Cover | 305454034 | 305454035 | 305454036 | Cast iron, ASTM-A48 CL30 |
| 81 | FTT Seal Cover | 305454037 | 305454038 | 305454039 | Cast iron, ASTM-A48 CL30 |
| 90 | FTT Mechanical Shaft Seal | 305240359 | 305240362 | Carbon/ceramic/FKM/stainless steel | |
| 100A | FTT Case Gasket | 305454040 | 305454041 | 305454042 | Nitrile |
| 100B | FTT Flapper Valve | 305454043 | 305454044 | 305454045 | Neoprene |
| 100C | FTT O-ring, Volute | 305463045 | 305463046 | 305463047 | Nitrile |
| 500A | FTT Pipe Plug, NPT (3 pack) | 305463048 | 305463049 | CAD-plated steel | |
| 500B | FTT Pipe Plug, 3/4″ (3 pack) | 305463050 | CAD-plated steel | ||
| 500C | FTT Pipe Plug, 1/4″ (4 pack) | 305463020 | n/a | CAD-plated steel | |
| 500D | FTT Pipe Plug, 1/8″ (3 pack) | 305463051 | n/a | CAD-plated steel | |
| 510 | FTT Impeller Hex Bolt | 305463052 | 305463053 | 305463054 | 300 series stainless steel |
| 520 | FTT Impeller Washer | 305453006 | 305454046 | 305454047 | Aluminum plate |
| 530A | FTT Washer, T-handle | 305463055 | n/a | Zinc-plated steel | |
| 530B | FTT Flapper Bolt | 305463056 | 305463057 | 305463058 | Zinc-plated steel |
| 530C | FTT Hex Nut (8/6 pack) | 305463033 | 305463059 | Zinc-plated steel | |
| 530D | FTT Lock Washer, 3/8″ (8/6 pack) | 305463032 | 305463060 | Zinc-plated steel | |
| 530E | FTT Nut, Flapper | 305463061 | 305463062 | Zinc-plated steel | |
| 530F | FTT Washer, Flapper | 305463063 | n/a | Zinc-plated steel | |
| 530G | FTT Valve Hex Cap Screw (4 pack or 8 pack) | 305463064 | 305463065 | Zinc-plated steel | |
| 530H | FTT Washer, Bearing Cover | 305463066 | 305463067 | Zinc-plated steel | |
| 530J | FTT Bolt, Bearing Cover | 305463068 | 305463069 | Zinc-plated steel | |
| 531A | FTT Threaded Stud, Cover (6 pack) | 305463070 | 305463071 | 305463072 | Zinc-plated steel |
| 531B | FTT Threaded Stud, Transmission (6 pack) | 305463031 | 305463073 | Zinc-plated steel | |
| 532 | FTT Set Screw | 305463074 | 305463075 | Zinc-plated steel | |
Franklin Electric FTT ORDERING INFORMATION
| Model | Pump Size (Dis. x Suc.) | Order No. | Weight (lbs) | Solid Size (in) |
|---|---|---|---|---|
| FTT-20 | 2 x 2 | 90240002 | 129 | 1-1/8 |
| FTT-30 | 3 x 3 | 90240003 | 190 | 2 |
| FTT-40 | 4 x 4 | 90240004 | 420 | 3 |
Franklin Electric FTT DIMENSIONS
| Model | Group | Suc. x Dis.(NPT) | Dimensionsp | Shaft Dia.(in) | Keyway (in) | |||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| A | B | C | D | E | F | H | J | K | L | M | N | P | Q | R | S | T | U | |||||
| FTT-20 | 801 | 2 x 2 | 21.25 | 3.00 | 3.59 | .44 | 4.00 | 5.00 | 4.78 | 5.75 | 7.25 | 15.50 | 7.42 | 4.75 | 3.25 | 4.25 | 8.50 | 5.38 | 5.38 | 10.75 | 1.250 | 1/4 x 1/4 |
| FTT-30 | 802 | 3 x 3 | 24.71 | 3.00 | 3.42 | .56 | 4.75 | 6.00 | 6.51 | 6.91 | 10.73 | 20.13 | 9.45 | 5.56 | -3.75 | 5.38 | 10.75 | 6.38 | 6.38 | 13.31 | 1.250 | 1/4 x 1/4 |
| FTT-40 | 803 | 4 x 4 | 30.06 | 3.00 | 3.57 | .56 | 7.25 | 9.00 | 6.64 | 9.00 | 14.00 | 26.50 | 11.76 | 7.00 | -4.76 | 7.75 | 15.50 | 8.88 | 8.88 | 17.76 | 1.625 | 3/8 x 3/8 |
Franklin Electric FTT-20 PERFORMANCE Curve
Franklin Electric FTT-30 PERFORMANCE Curve
Franklin Electric FTT-40 PERFORMANCE Curve
Understanding the FTT-20/40 Model Designation
The FTT-20/40 designation causes some confusion for first-time buyers. It does not mean a single pump that delivers between 20 and 40 GPM. Rather, it is the series name covering three distinct pump sizes: the FTT-20, FTT-30, and FTT-40.
The numbers 20, 30, and 40 represent the relative pump size within the series, with each larger model delivering progressively higher flow rates and suited to larger-scale applications. The FTT-20 with 2-inch suction and discharge ports handles smaller high-capacity jobs. The FTT-30 with 3-inch ports handles medium-scale irrigation and construction demands. The FTT-40 with 4-inch ports is the high-volume model suited for large agricultural irrigation, municipal applications, and high-flow water truck service.
All three models are rated for the same maximum head (140 feet) and maximum working pressure (75 PSI), with the flow capacity increasing as you move from the FTT-20 to the FTT-40. Contact Ken’s Distributing at 303.699.7845 for specific performance curve data on each model so you can match the right size to your GPM requirements.
Construction Details
Volute
The FTT pump case is cast iron conforming to ASTM-A48 CL30, a specification that establishes minimum tensile strength and casting quality for pressure-containing pump components. Reinforced external ribs on the volute add structural strength to handle the working pressures and flow forces at the higher capacity ratings of the FTT-30 and FTT-40 models.
A clean-out cover with wing nuts is built into the volute for quick access to the pump interior without tools. This is particularly useful when the pump has been handling water with solids and you need to inspect or clear the impeller area without a full pump teardown. Tapped openings for priming, venting, and draining are included in the volute body for straightforward commissioning and seasonal service.
The built-in check valve with a threaded NPT suction inlet is an important design feature. It prevents back-siphoning when the pump shuts down and holds the liquid in the suction line between cycles, which facilitates faster re-priming on the next start. This eliminates the need for an external foot valve on the suction line in most installations.
Impeller
The two-vane enclosed cast iron impeller is the defining hydraulic feature of the FTT series. Cast iron conforming to ASTM-A48 CL30 provides the material strength and abrasion resistance needed for water sources carrying solids. The two-vane design with large passage dimensions allows spherical solids to pass through the pump without clogging.
A key engineering benefit of this impeller design is that it eliminates the need for a replaceable wear plate. The two-vane geometry maintains adequate clearances for solids passage without requiring the tight impeller-to-wear-plate clearances that other designs use for efficiency, which means the pump maintains performance over a longer service interval without wear plate replacement.
Mechanical Seal
The standard mechanical seal uses carbon and ceramic sealing faces with FKM (Fluoroelastomer) elastomers and 300 Series stainless steel hardware. FKM provides excellent resistance to a wide range of chemicals, fuels, and elevated temperatures, making it the appropriate elastomer choice for the 212-degree F maximum temperature rating of the FTT series. FKM performs significantly better than BUNA or Nitrile at elevated temperatures and in chemically challenging water conditions.
As noted, the OEM seals for the TT-20/40 and FTT-20/40 models are manufactured by Ken’s Distributing Company, making Kendisco the direct source for genuine replacement seals when service is needed on these specific models.
Bearing Frame
The heavy-duty bearing frame uses sealed bearings and a keyed stainless steel shaft that supports both belt drive and direct drive configurations. Sealed bearings resist contamination from the outdoor and construction site environments where the FTT series is most commonly deployed. The horizontal mounting orientation is the designed operating position for all three FTT models.
Applications and Industries
The FTT-20/40 Series is suited for high-volume applications where standard self-priming pumps do not have the flow capacity or the solids handling needed for the job.
- Large-Scale Agricultural Irrigation: The FTT-30 and FTT-40 models handle the high flow rates needed for large field irrigation from ponds, canals, and open water sources. The built-in check valve and self-priming design manage the repeated start-stop cycles of automated irrigation systems without operator intervention. The two-vane impeller handles the organic debris and silt common in agricultural water sources without clogging.
- Construction Dewatering: Large excavation sites, deep trenches, and foundation dewatering jobs require high flow rates to keep pace with groundwater infiltration. The FTT-40 with its 4-inch ports handles high-volume dewatering in sediment-laden water conditions common on active construction sites.
- Municipal Water Transfer: Municipalities use the FTT series for emergency bypass pumping, water main filling, and high-volume transfer operations where self-priming reliability and high flow capacity are both needed.
- Water Truck Service: High-flow water truck applications for road construction, dust control, and large-area site watering use the FTT-30 and FTT-40 for their capacity to fill and discharge quickly.
- Mining: Mining site dewatering involves high-sediment water that demands a pump with both solids handling capability and the flow rates needed to keep pace with groundwater inflows in deep operations.
- Commercial and Light Industrial: Large commercial irrigation systems, industrial process water supply, and cooling water applications where high flow and self-priming reliability are required.
Features and Benefits
- Up to 740 GPM Flow Capacity: The FTT-40 model delivers flow rates that very few self-priming frame mount pumps can match. For large-scale agricultural and municipal applications, this capacity level eliminates the need to run multiple smaller pumps in parallel.
- Two-Vane Enclosed Impeller for Spherical Solids Handling: Large passage dimensions allow spherical solids to pass through without clogging. The two-vane design also eliminates the need for a replaceable wear plate, reducing maintenance requirements and service costs over the pump’s service life.
- Built-In Check Valve at Suction Inlet: Prevents back-siphoning on shutdown and retains liquid in the suction line between cycles to facilitate rapid re-priming. Eliminates the need for a separate external foot valve in most installations.
- Reinforced Cast Iron Volute: External reinforcing ribs on the ASTM-A48 CL30 cast iron volute add structural integrity at the higher flow rates and pressures of the FTT-30 and FTT-40 models.
- Clean-Out Cover with Wing Nuts: Tool-free access to the pump interior for inspection and clearing without full disassembly. A practical feature for pumps handling water with solids where periodic interior inspection is part of normal maintenance.
- FKM Mechanical Seal: FKM elastomers handle temperatures up to 212 degrees F and provide broad chemical resistance beyond what BUNA or Nitrile elastomers offer. The right seal for high-temperature and chemically challenging applications.
- Tapped Volute Ports: Priming, venting, and draining ports in the volute body make startup commissioning, air bleeding, and seasonal drainage straightforward without disconnecting installed piping.
- Belt Drive and Direct Drive Compatibility: The heavy-duty bearing frame supports both drive configurations, allowing the FTT series to be powered by electric motors, gas engines, or PTO shafts depending on the available power source at the installation site.
- Kendisco OEM Seal Supply: Genuine OEM replacement seals for the TT-20/40 and FTT-20/40 models are manufactured by Ken’s Distributing Company, making Kendisco your direct and most reliable source for seal replacements when service is needed.
FTT-20/40 vs. FMIT Series: Choosing the Right High-Flow Self-Priming Pump
Both the FTT-20/40 and the FMIT Series are Franklin Electric frame mount self-priming centrifugal pumps with cast iron construction and Viton or FKM mechanical seals. Here is how they compare to help you choose the right one for your application.
| Feature | FTT-20/40 Series | FMIT Series |
|---|---|---|
| Max Flow | Up to 740 GPM | Lower maximum flow |
| Max Head | 140 feet | Varies by model |
| Impeller Design | Two-vane enclosed, spherical solids capable | Semi-open non-clogging |
| Wear Plate | Not required by design | Replaceable wear plate included |
| Solids Handling | Spherical solids passage | Mud, sand, silt up to 10% by volume |
| Built-In Check Valve | Yes, at suction inlet | No |
| Clean-Out Cover | Yes, with wing nuts | No |
| Seal Elastomer | FKM | Viton |
| Max Temperature | 212 degrees F | Standard temperature range |
| Best For | Very high flow, spherical solids, high temp | High solids content, abrasive water |
If your application needs the highest possible flow capacity, handling of spherical solids, or operation at elevated temperatures up to 212 degrees F, the FTT-20/40 is the right choice. If your primary concern is handling high concentrations of sand, silt, and mud with abrasive wear protection from a replaceable wear plate, the FMIT Series may be the better fit. Call Ken’s Distributing at 303.699.7845 and we will help you decide based on your actual application requirements.
Installation and Compatibility
- Mounting Orientation: The FTT-20/40 is designed for horizontal mounting only. Ensure your skid or mounting frame holds the pump in the correct horizontal position during operation. Do not attempt vertical installation.
- Built-In Check Valve: The threaded NPT suction inlet includes a built-in check valve that eliminates the need for a separate external foot valve in most installations. Ensure the check valve is functioning correctly before startup to confirm it holds liquid in the suction line between cycles.
- Initial Priming: Fill the pump housing through the tapped priming port before the first startup. Use the venting port to bleed air from the housing during fill. After the initial fill, the self-priming design and built-in check valve handle every subsequent restart automatically.
- Clean-Out Cover Inspection: Use the wing-nut clean-out cover for periodic interior inspection, especially when the pump is handling water with solids. Check for debris accumulation around the impeller during scheduled maintenance.
- Suction and Discharge Piping: Match your pipe diameter to the NPT connection size for your specific model. The FTT-20 uses 2-inch connections, the FTT-30 uses 3-inch connections, and the FTT-40 uses 4-inch connections. Do not reduce pipe diameter on the suction side as this limits flow and increases the risk of cavitation.
- Drive Setup: For belt drive, size pulleys to achieve the correct RPM for your desired flow and head. Ensure proper belt tension and pulley alignment before startup. For direct drive, use a flexible coupling and align carefully. Rotation is clockwise when viewed from the motor end.
- Mechanical Seal: Never run the FTT pump dry. The FKM mechanical seal requires liquid at the seal faces during all operation. Even brief dry running can damage the carbon and ceramic seal faces.
- Winterizing: Drain the pump completely through the tapped drain port before freeze conditions. The cast iron volute can crack if water is allowed to freeze inside the housing.
Replacement Parts and Service
The clean-out cover with wing nuts makes routine inspection and minor clearing practical without tools or major disassembly. The two-vane impeller design that eliminates the wear plate also simplifies the parts list for ongoing maintenance compared to pumps that require periodic wear plate replacement.
The OEM replacement seals for the TT-20/40 and FTT-20/40 models are manufactured by Ken’s Distributing Company, making Kendisco your most direct and reliable source for genuine seal replacements on these specific models. When you need a seal or any other replacement component, call us at 303.699.7845 and we will identify the correct part by model number and get it shipped fast.
Browse our Franklin Electric replacement parts and repair kits for the FTT Series and all other Franklin Electric pump lines.
Frequently Asked Questions
What does FTT-20/40 mean on this Franklin Electric pump?
FTT-20/40 is the series designation covering three pump sizes: the FTT-20, FTT-30, and FTT-40. The numbers represent the relative pump size and port diameter in inches, with the FTT-20 using 2-inch connections, the FTT-30 using 3-inch connections, and the FTT-40 using 4-inch connections. Each larger model delivers progressively higher flow capacity up to the series maximum of 740 GPM.
How many GPM does the Franklin Electric FTT series deliver?
The FTT series delivers capacities up to 740 GPM depending on the model size and operating conditions. The FTT-40 is the highest-capacity model in the series. Contact Ken’s Distributing at 303.699.7845 for specific performance curve data showing GPM at various head pressures for each model.
Does the FTT pump need a foot valve on the suction line?
In most cases, no. The FTT-20/40 includes a built-in check valve at the threaded NPT suction inlet that prevents back-siphoning and retains liquid in the suction line between pump cycles. This built-in check valve serves the same function as an external foot valve, eliminating the need for a separate fitting in most standard installations.
Is the FTT-20/40 self-priming?
Yes. After filling the pump housing through the tapped priming port for the first startup, the FTT self-priming design handles every subsequent restart automatically. The built-in suction check valve retains liquid in the suction line between cycles to facilitate rapid re-priming without manual intervention.
What type of solids can the FTT pump handle?
The two-vane enclosed impeller is specifically designed to pass spherical solids. The large passage dimensions between the two impeller vanes allow round or near-round solid objects to move through the pump without clogging. This capability makes the FTT series suitable for water sources carrying gravel, seeds, and other spherical debris that would clog standard impeller designs.
Where can I get genuine OEM replacement seals for the FTT-20/40?
Ken’s Distributing Company manufactures the OEM seals for the TT-20/40 and FTT-20/40 models. Kendisco is your most direct source for genuine replacement seals for these specific pump models. Call us at 303.699.7845 for seal availability and fast shipping.
What is the maximum operating temperature for the FTT series?
The FTT-20/40 Series is rated for a maximum operating temperature of 212 degrees F. The FKM elastomers in the mechanical seal provide the chemical and temperature resistance needed for operation at this temperature range, which exceeds the capability of standard BUNA or Nitrile seal materials.
Related Products
- Compare with the Franklin Electric FMIT frame mount self-priming pump for high-solids abrasive applications
- See the FBSTF Series frame mount self-priming pump for moderate flow applications
- Browse all Franklin Electric water truck pump models
- View the Franklin Electric FMIT branded model page
- Shop Franklin Electric replacement parts and repair kits for all series
Authorized Franklin Electric Distributor | OEM Seal Manufacturer for FTT-20/40 Models | Get Your Quote Today | Call 303.699.7845 | Fast Shipping Available