Durco Mark 3 Lo-Flo Replacement Pump
Need a replacement for an installed Durco Mark 3 Lo-Flo? ANSI Pumps Pro offers a non-OEM replacement for the Mark 3 LF dimensional pattern. Match the installed size, review the duty and materials, then send your requirements for a quote.
Start with what you have. Unknown details can be confirmed during review.
01 / CHECK THE INSTALLED PUMP
Can this replace your existing pump?
Use the installed pump data to check the proposed replacement pattern. Send the information you have; engineering can identify missing details.
Fit is confirmed against the exact size, configuration, duty and installation data. The model name alone is not an interchangeability guarantee.
02 / VERIFY REQUIREMENTS
Check model, parameters and materials
We compare the installed data with the proposed replacement configuration before confirming fit and quotation scope.
The source page lists these wet-end material families; the suitable material and seal combination depends on liquid composition, concentration, temperature, pressure, solids and leakage requirements. Include those service details for confirmation.
Select a row to see what information helps confirm fit and prepare a quote.
Standard / patternANSI/ASME B73.1 · non-OEM replacement for the Durco Mark 3 LF dimensional pattern
Sizes / groups
ImpellerReverse vane with external adjustment
Seal chambers
Operating curveCONFIRM FOR QUOTENo independent LF performance range published; confirm on the approved size-specific curve
Published wet-end materials
03 / REQUEST PRICING
Have a nameplate? Start your quote.
Send your pump size, duty point, material requirement and quantity. Attach a nameplate, curve or drawing. Leave unknown fields blank and we will follow up.
Request a Lo-Flo replacement quote
Share the installed LF model, flow, head, speed and service conditions. We will review the proposed size, seal chamber and wet-end material before confirming the quote.
Nameplate, approved curve, seal arrangement and installation drawing.
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ENGINEERING NOTES
D Mark III LF size, curve and materials
ANSI Pumps Pro offers the D Mark III Low Flow as an ANSI/ASME B73.1 reverse-vane replacement in Groups 1 and 2. Four LF sizes are listed for the Durco Mark 3 LF dimensional pattern. No independent LF performance range is published, so a model-specific approved curve is required to confirm flow and head.
Frequently asked questions
Which Durco Mark 3 Lo-Flo sizes are listed?
The listed sizes are 1K 1.5×1LF-4, 1K 1.5×1LF-8, 2K 2×1LF-10 and 2K 3×1.5LF-13 in Groups 1–2. Confirm the installed size and group from the nameplate and drawing.
Can the replacement use the same operating point?
No independent Lo-Flo performance range is published. Send minimum, normal and maximum flow and head so the proposed size can be checked against its approved curve.
Can I request a wet end or rotating assembly?
State the required supply scope and installed configuration in the quote form. The available scope will be confirmed during review.