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561.414.1046

Flygt Plug-In 45mm Seal Kit — Fits 3171, 4650, 4660, 5100.250/.251/.260/.261

Flygt plug-in 45 mm double cartridge mechanical seal kit for Flygt 3171, 4650, 4660 and 5100.250 pumps

Flygt Plug-In 45mm Seal Kit — Fits 3171, 4650, 4660, 5100.250/.251/.260/.261

SKU: 3171

Weight 3 lbs
Dimensions 6 × 6 × 4 in
QTY Price
Have a Question?
  • DESCRIPTION

    Flygt Plug-In 45mm Seal Kit — Double Cartridge Mechanical Seal

    The Flygt plug-in 45mm seal kit is a replacement pre-assembled double cartridge mechanical seal for Flygt/Xylem submersible pumps and mixers built on a 45mm shaft. The plug-in design holds the motor-side and liquid-side seals in a single aligned unit, built to OEM-equivalent standards or higher.

    Housing spring note: The “long spring” is a housing retention spring used to help hold the plug-in components / pump housing together. It is not part of the mechanical seal cartridge. This spring is included in the factory/OEM O-ring kit.

    At a Glance

    • Shaft size: 45mm

    • Type: Pre-assembled double cartridge (plug-in)

    • Fits: Flygt 3171, 4650, 4660, 5100.250/.251/.260/.261

    Flygt 45mm Plug-In Seal Kit – Choose Your Kit
    Find the version you need, then select the same name from the dropdown above. The first three fit every pump listed below; the fourth is built for the Flygt 4660 mixer.
    Kit What’s in the box Choose this if
    Cartridge mechanical seal Pre-assembled double cartridge mechanical seal (motor-side and liquid-side seals in one unit) Your O-rings are still in good condition and you only need to replace the seal cartridge.
    Cartridge mechanical seal + O-ring kit Double cartridge mechanical sealComplete O-ring kit, matched to your pump model (see the Specifications tab for kit numbers) You are doing a full rebuild and want the O-rings replaced with the seal.
    Cartridge mechanical seal + O-ring kit + long spring Double cartridge mechanical sealComplete O-ring kit, matched to your pump modelLong spring for the bearing housing / volute (Flygt 607 48 04) Your build uses the long housing retention spring and it needs replacing.
    Cartridge mechanical seal + O-ring kit + basic hardware, bearings & gasket Double cartridge mechanical sealComplete O-ring kit, matched to your pump modelBasic hardware (snap rings and retaining hardware)BearingsGasket You are rebuilding a Flygt 4660 mixer and want every wearing part in one order.The 4660 is the only model in this range that takes the gasket.
    Not sure which kit you need? Call or text 561-414-1046 with a photo of your pump nameplate — no purchase required.
    Applications

    • Flygt 3171 — 3171.091, 3171.095, 3171.181, 3171.185, 3171.350, 3171.360, 3171.390, 3171.660, 3171.670

    • Flygt 4650 and 4660 — compact submersible mixers

    • Flygt 5100 — 5100.250, 5100.251, 5100.260, 5100.261

    Flygt 5100 owners: the 5100 is built on three shaft sizes. This 45mm kit fits the 5100.250, .251, .260 and .261. For a 5100.210, .211, .220 or .221 you need our Flygt Plug-In 35mm Seal Kit, and for the 5100.300 or .310 our Flygt Plug-In 60mm Seal Kit.

    Important fitment note: Flygt plug-in seal assemblies can vary by build. Please enter your full pump model number at checkout under “Pump Model Number Notes” so we can confirm the correct configuration for your unit.

    Explore our full line up of Pump Repair Kits

    Looking for more? Shop  Shaft seals, Parts & Accessories, and Pre-Cut Gaskets.

    Have questions?- Call us anytime-we’re here to help 

  • SPECIFICATIONS

    Cross References / Alternative Part Numbers

    Also searched as

    • Flygt plug-in 45mm cartridge seal
    • Flygt 45mm double cartridge mechanical seal
    • Flygt double mechanical seal cartridge (pre-assembled)
    • Flygt 3171 repair kit / Flygt 3171 seal kit
    • Flygt 4650 mixer seal / Flygt 4660 mixer seal
    • Flygt 5100.250 mechanical seal / Flygt 5100.260 mechanical seal

    Model number variations (as printed on nameplates and typed in search)

    • 3171 — 3171.091, 3171.095, 3171.181, 3171.185, 3171.350, 3171.360, 3171.390, 3171.660, 3171.670; also typed 3171-181, 3171 181, N 3171, NP 3171
    • 4650 — also typed SR 4650, Flygt 4650 mixer
    • 4660 — also typed SR 4660, Flygt 4660 mixer
    • 5100 — 5100.250, 5100.251, 5100.260, 5100.261; also typed 5100-250, 5100 250, HS 5100.250, H 5100

    Brand variations
    Flygt, Xylem Flygt, ITT Flygt

    Part number cross references (verify by pump build/configuration)

    • 6196430 (also searched as 619-6430 / 619 6430)
    • S-FLT-6196430 (aftermarket catalog reference)
    • VG-20003 (aftermarket “Flygt Plug-In” replacement seal reference)
Disclaimer: Seal House USA provides aftermarket replacement parts. Any OEM names are used strictly for cross-reference. We are an independent supplier.

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