Grundfos 96525457, Shaft Seal Kit, CR/N 32/45/64/90, HQBE

Grundfos 96525457 Shaft Seal Kit (HQBE) for CR, CRI and CRN 32, 45, 64 and 90 Pumps

The Grundfos 96525457 is the genuine OEM Kit, Shaft Seal HQBE for Grundfos CR, CRI and CRN vertical multistage centrifugal pumps built on the 22 mm shaft platform — pump sizes CR/N 32, 45, 64 and 90. Grundfos catalogues the kit under the fitment code CR/N 32-150. It ships as a pre-assembled balanced cartridge, so the seal faces arrive lapped and correctly pre-loaded from the factory and never have to be measured, shimmed or set by hand on the bench.

Replacing a shaft seal is the single most common repair on a CR-series pump. A weeping or chattering seal is usually the first symptom, and running a pump on a failed seal pushes water into the motor bearings and turns a part replacement into a motor replacement. Fitting the correct OEM cartridge restores the factory face pairing and spring load instead of guessing at an aftermarket equivalent.

What the HQBE seal code means

Grundfos identifies every shaft seal with a four-letter material code. Each position has a specific meaning, so HQBE decodes as follows:

• H — shaft seal type: balanced cartridge seal
• Q — rotating seal face: silicon carbide
• B — stationary seal face: resin-impregnated carbon
• E — secondary seals, O-rings and rubber parts: EPDM

A silicon-carbide-on-carbon face pairing runs cooler and with lower friction than a hard-on-hard silicon carbide / silicon carbide combination, which makes HQBE well suited to clean water and lower-lubricity liquids where brief dry-running or light cavitation is possible. The EPDM elastomers are appropriate for water, glycol mixtures and hot-water heating loops. EPDM is not compatible with mineral oils or petroleum-based fluids — for those applications choose an FKM (Viton) version, identified by a seal code ending in V.

What is included in the kit

• Complete HQBE balanced cartridge shaft seal assembly, including its O-rings
• Grinding device for dressing and cleaning the seal chamber before the new cartridge is installed
• Seal mounting guide used to seat the cartridge squarely on the shaft

Specifications

Grundfos pumps that use the 96525457 kit

This kit covers the 22 mm shaft group of the CR range, which includes the CR 32, CRN 32, CR 45, CRN 45, CR 64, CRN 64, CR 90 and CRN 90 families in all stage counts — for example CR 32-2, CR 45-7, CR 64-2 and CR 90-4. The correct kit for a given pump is set by the seal code printed on the pump nameplate: a pump ordered as CR 45-7 A-F-A-E-HQBE takes this kit. If the nameplate ends in HQQE or HQQV, order the matching kit instead.

Other seal codes for the same 22 mm shaft

• 96525457 — HQBE (this kit): silicon carbide / carbon / EPDM
• 96525458 — HQQE: silicon carbide / silicon carbide / EPDM
• 96525490 — HQQV: silicon carbide / silicon carbide / FKM (Viton)

See the full range of Grundfos shaft seal kits for other shaft sizes and pump families.

Frequently asked questions

What pumps does the Grundfos 96525457 shaft seal kit fit?

It fits Grundfos CR, CRI and CRN vertical multistage pumps with a 22 mm shaft — sizes 32, 45, 64 and 90. Grundfos lists the fitment as CR/N 32-150. Confirm the seal code on your pump nameplate reads HQBE before ordering.

What does HQBE stand for?

HQBE is the Grundfos four-letter shaft seal code: H is a balanced cartridge seal, Q is a silicon carbide rotating face, B is a resin-impregnated carbon stationary face, and E is EPDM secondary seals and O-rings.

What is the difference between HQBE and HQQE?

Both are balanced cartridge seals with EPDM elastomers. HQQE uses silicon carbide on both faces, which is harder and more abrasion resistant. HQBE pairs silicon carbide against resin-impregnated carbon, which runs cooler and with less friction on clean water and low-lubricity liquids. Always match the code on the pump nameplate.

Is a grinding device included?

Yes. The 96525457 kit is supplied with the grinding device used to dress and clean the seal chamber, plus the mounting guide for seating the new cartridge, in addition to the shaft seal itself.

Can I use this kit with oil or fuel?

No. The EPDM elastomers in HQBE are not compatible with mineral oils or petroleum-based fluids. For those liquids select the FKM (Viton) version, which carries a seal code ending in V.

Is this a genuine Grundfos part?

Yes. Cedar’s HVAC Supply sells the factory Grundfos service kit under Grundfos product number 96525457, EAN 5700397000458, manufactured in Denmark. It is not an aftermarket or rebuilt equivalent.

Why buy from Cedar’s HVAC Supply

• Genuine OEM Grundfos service kit — no aftermarket substitutions or rebuilt cartridges
• Correct-part verification: send us your pump nameplate and we will confirm the seal code before you order
• 30-day return window on unused parts in original packaging
• Talk to a person who knows pumps — call (305) 850-6693 or email [email protected]

Cedar’s HVAC Supply is a Miami, Florida based distributor of heating, cooling, refrigeration and pump components serving contractors, facility managers and property owners throughout the United States.