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

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, which shortens rebuild time and delivers repeatable sealing performance compared with fitting loose component seals.

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

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

Important: the Flygt 5100 is built on two different shaft sizes. This 45 mm kit fits the 5100.250, .251, .260 and .261. If you have a 5100.300 or 5100.310, you need our Flygt Plug-In 60 mm Seal Kit instead.

Don’t see your exact build number? Call or text 561-414-1046 with your pump nameplate and we’ll confirm the correct configuration.

Available Versions & What’s Included:

• Cartridge mechanical seal only
  Includes the pre-assembled double mechanical seal cartridge (motor-side and liquid-side seals in one unit).

• Cartridge mechanical seal + O-ring kit
  Includes the cartridge mechanical seal + OEM O-ring kit. Recommended for a full rebuild.

• Cartridge mechanical seal + O-ring kit + Long spring (bearing housing / volute)
  Includes the cartridge mechanical seal + OEM O-ring kit with the long spring for bearing housing / volute (contained in the OEM O-ring 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.

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