Grundfos CR / LP / UTP — OEM Type B Bellows Component Mechanical Seal (12mm / 16mm)

OEM-style Type B bellows component mechanical seal for Grundfos CR/CRK/CRN, plus LP and UTP pump applications. Order by shaft size and OEM reference for fast, accurate matching: 12mm Type B (BUBV) Grundfos 405347 / 405347TC / 405096, or 16mm Type B (BUBE) Grundfos 425762 / 964092654 / 425763 (equivalent style reference VGMG-1304). Each option is supplied with SiC/SiC seal faces and Viton (FKM) elastomers for reliable sealing in demanding pump service.

What’s included: Component mechanical seal (rotary + stationary seat). (Ancillary gaskets/sleeves sold separately unless noted.)

Sizes & OEM cross-references (for fast, accurate ordering select size from drop down menu above)

12mm — Grundfos 405347 — OEM Type B (BUBV)

• Build: Single-spring full bellows component seal, 2-piece (rotary + stationary seat) with O-ring; SiC/SiC/Viton®

• Fits: CRK 2, CRK 4 (Seal House has confirmed fitment to CRK4)

• Alternative / manufacturing numbers: 405096, 405347, 405347TC

16mm — Grundfos 425762 / 964092654 — OEM Type B (BUBE)

• Build: Single-spring full bellows component seal, 2-piece (rotary + stationary seat) with O-ring; SiC/SiC/Viton®

• Fits: CRN 8, CR 16

• Equivalent: VGMG-1304

• Confirmed applications (examples): 2.5LP5 U-G-A-BUBE, UPT50-160 U-G-A BUBE D9726

• Primary mfg number: Old 425762 ? New 964092654; alternate numbers: 425763, 425762TC

Fitment note: Verify shaft size (12mm or 16mm), pump series (CR/CRK/CRN/LP/UTP), and OEM type code (BUBV/BUBE) against your nameplate or parts list.

Cross References & Alternative Part Numbers

Search by any of the OEM numbers below to find the correct Grundfos Type B bellows component mechanical seal:

12mm — Type B (BUBV)

• Grundfos 405347 (also searched as: 405 347 / #405347 / 405347TC)

• Alternative numbers: 405096 (405 096 / #405096)

16mm — Type B (BUBE)

• Grundfos 425762 (425 762 / #425762 / 425762TC)

• Superseded by (new number): 964092654 (964 092654 / #964092654)

• Related / alternate numbers: 425763 (425 763 / #425763)

• Equivalent style reference: VGMG-1304 (VGMG 1304 / VGMG1304)

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