Franklin Electric 7.5-Inch Frame Mount Centrifugal Pump & Parts

Franklin Electric 7.5-Inch Frame Mount Pump options are available for irrigation, commercial water transfer, construction and other higher-flow services where a separately driven, bearing-frame centrifugal pump is required. The HC 7.5-inch nominal-impeller family includes six discharge/suction configurations, with packing or mechanical seals. Ken’s Distributing Company can help you identify a complete frame-mounted pump assembly or the correct OEM repair component by manufacturer model and order number.

Request the correct configuration: send the pump’s discharge and suction sizes, required flow in GPM, total dynamic head, intended shaft speed, rotation, and sealing preference. For a repair, include the nameplate and figure number. These are frame-mount units with their own shaft and bearings, not close-coupled motor-driven pump packages.

Franklin Electric 7.5-Inch Frame Mount Pump: Quick Specifications

Performance selection: The 7.5-inch catalog contains different fixed-speed and variable-speed curves for each port combination. Maximum flow, maximum head and maximum allowable working pressure cannot be inferred from nominal impeller diameter alone. Provide your required duty point for a selection based on the applicable curve and equipment pressure rating.

Choose a 7.5-Inch Frame-Mount Pump by Port Size and Seal

The manufacturer uses discharge x suction x nominal-impeller designations. For example, 3 x 4 – 7.5 indicates a 3-inch discharge and 4-inch suction within the nominal 7.5-inch impeller family. Confirm the selected flange size, rotation and seal type before ordering.

Franklin Electric 7.5-Inch Ordering Numbers

*The catalog’s first ordering row for 2½-inch discharge shows an inconsistent suction-size designation, while its model code, mechanical-seal row, dimensions and parts drawing use 2½ x 4. Confirm the flange dimensions of the packing configuration before quotation.

Complete-pump quote: Tell Ken’s Distributing Company whether you need a replacement frame-mounted pump, an existing pump-end assembly or help specifying a separately driven installation. Include the order number when known and the required flow, head, suction conditions, driver speed and coupling arrangement. Price and availability are confirmed for the exact configuration.

7.5-Inch Pump Design and Applications

Built for serviceable frame-mounted installations

• Replaceable wear surfaces: separate impellers, wear rings, shaft sleeves and seals let technicians repair worn hydraulic components instead of automatically replacing the whole assembly.
• Choice of sealing arrangement: specify traditional packing with a lantern ring or the appropriate mechanical-seal configuration for the application and maintenance plan.
• Bearing frame: the dedicated shaft and bearings support driven installations where the motor or other prime mover is separate from the wet end.
• Application fit: potentially suitable for irrigation pump stations, industrial process-water transfer, municipal facilities and construction-water management, subject to fluid quality and curve-based selection.

How to size an HC 7.5-inch pump

Start with required GPM at total dynamic head, including static elevation, pipe friction, fittings and discharge conditions. Check available NPSH, impeller trim, operating speed and shaft horsepower from the correct curve. Also check the minimum recommended operating flow for that hydraulic size. The larger 4 x 5 performance chart specifically marks a restricted continuous operating region at low flow.

OEM 7.5-Inch Frame Mount Replacement Parts

For repair-parts inquiries, begin with the exact HC pump size and the figure number on Franklin’s exploded diagram. Some hydraulic parts differ with port size even when the pumps share the same nominal impeller family. The table below gives the size-specific casing, impeller and wear-ring mappings from the linked catalog.

Volutes, Impellers and Bronze Wear Rings by Pump Size

The 4 x 5 parts page lists impeller 305410925 as a 7-inch trim in a 7.5-inch nominal series. Confirm the existing impeller trim before ordering; the nominal series name does not mean every replacement impeller is supplied at exactly 7.5 inches.

Common Seal, Shaft-Sleeve and Service Components

Mechanical Seal and Packing Repair Kits

Bearing-Frame Repair Parts

The frame-mount version also has a separately serviceable bearing housing. These components are listed in the bearing-frame breakdown of the manufacturer’s catalog.

Replacement-parts quote: send your pump model and nameplate, required figure number and OEM part number, seal type and a photograph of the installed component when the model is uncertain. A 3 x 4 impeller or wear ring should not be assumed interchangeable with a 4 x 5 assembly. If the shaft, bearing frame or casing is badly worn, ask whether repairing the original pump or replacing the frame-mounted assembly is more economical.

Frame-Mount Dimensions and Installation Checks

The selected pump size affects connection clearances and the casing end of the installation. The selected dimension values below are taken from Franklin’s catalog, with dimensions in inches; use the full drawing for every required mounting and flange dimension.

Verify shaft/coupling alignment, bearing-frame support, piping loads and space for accessing packing, seal and bearing components. Use the manufacturer dimensional drawing rather than these selected measurements alone for fabrication or mounting.

Performance Curves, Repair Diagrams and Original Ordering PDF

The original 27-page Franklin Electric file includes the full ordering and dimension tables, exploded diagrams, port-size-specific repair-parts lists, bearing-frame parts, and both fixed-speed and variable-speed performance curves.

Download the Franklin Electric 7.5-inch frame-mount ordering, parts and performance catalog (PDF)

7.5-Inch Frame Mount vs. Larger Franklin Centrifugal Pumps

This page covers the nominal 7.5-inch frame-mount hydraulic family and its OEM service components. For a different duty point or piping arrangement, compare Franklin Electric 9-inch frame-mount centrifugal pumps. Each family has its own hydraulic curves and parts numbers, so order using the exact series and configuration rather than nominal size alone.

Frequently Asked Questions

Does the 7.5-inch designation mean a 7.5 HP motor?

No. It refers to a nominal impeller-size family. A frame-mounted pump requires a driver selected to provide the speed and shaft power required at the chosen operating point.

What is the difference between a frame-mounted pump and a close-coupled pump?

A frame-mounted pump has its own shaft and bearing support and connects to an external driver. A close-coupled pump is integrated with the motor. The two styles should not share a model table unless the manufacturer’s catalog explicitly matches them.

Can I purchase packing or mechanical-seal versions?

Yes. Franklin’s 7.5-inch frame-mount ordering table includes both packing and mechanical-seal configurations for each listed nominal port combination. Select the matching order number and confirm availability.

Which OEM kit fits a leaking mechanical seal?

The manufacturer’s catalog lists mechanical-seal service kit 305415926 and mechanical seal component 305415904. Confirm the model, seal arrangement and actual source of leakage before choosing a replacement part.

Are the 7.5-inch impellers interchangeable between different port sizes?

No universal interchangeability should be assumed. Franklin lists different impeller and wear-ring numbers for the individual hydraulic sizes, as shown in the parts table above.

Can I select a pump from the maximum GPM or head figures?

Use the curve for the chosen port combination, speed and impeller trim instead. Send your required GPM and total dynamic head for help selecting a pump that meets the actual duty point.

Where can I request pricing for a pump or individual repair parts?

Ken’s Distributing Company can review a complete-pump model, a specific component number or a repair-kit request. Provide the manufacturer order number or pump size, operating requirements and whether you need an assembly or replacement part.

Request a Quote for Franklin Electric 7.5-Inch Frame Mount Pumps and Parts

Contact Ken’s Distributing Company for price and availability or call 303-699-7845. We can help review the exact configuration before you place an order. For broader repair inquiries, visit Franklin Electric replacement parts.

Related Franklin Electric Frame Mount Centrifugal Pumps

• Franklin Electric 9-Inch Frame Mount Centrifugal Pump – Compare XS439 and XS869 configurations for agricultural, commercial, and industrial water transfer.
• Franklin Electric 10-Inch Frame Mount Centrifugal Pump – Explore larger frame-mounted configurations for demanding flow and head requirements.
• Franklin Electric 13-Inch Frame Mount Centrifugal Pump – Heavy-duty configurations for large irrigation systems, municipal water supply, and industrial pumping.
• Franklin Electric Replacement and Repair Parts – Find pump impellers, mechanical seals, wear rings, shaft sleeves, and bearing-frame components.