43mm Grundfos Cartridge Mechanical Seal Replacement
- This 43mm Grundfos cartridge mechanical seal replacement is designed for maintenance and repair of Grundfos vertical multistage pumps, including CR and CRN pump applications where a cartridge-style seal is required. The pre-assembled structure helps simplify installation and reduce handling errors during pump service.
Description:
Operating Limits:
- Item | Specification |
- Product type | Cartridge mechanical seal replacement |
- Application | Grundfos pump seal replacement |
- Standard size | 43 mm |
- Pump series | CR, CRN, and related Grundfos vertical multistage pumps by confirmation |
- Temperature | -20 C to 120 C, depending on elastomer and face materials |
- Pressure | Confirm according to pump model and seal structure |
- Main service | Clean water, hot water, industrial water, pressure boosting, light chemical liquid |
Materials:
- Part | Available materials |
- Seal faces | Silicon carbide, carbon graphite, tungsten carbide by confirmation |
- Secondary seals | EPDM, FKM, Viton, NBR by confirmation |
- Springs | Stainless Steel 304, Stainless Steel 316 |
- Metal parts | Stainless Steel 304, Stainless Steel 316 |
- Common configurations | HQQE, HQQV by confirmation |
HQQE is often selected for clean water and general pump service where EPDM elastomer compatibility is suitable. HQQV may be selected when FKM or Viton elastomer resistance is required. Final selection should be confirmed according to liquid type, temperature, pressure, and pump model.
Applications
This 43mm Grundfos cartridge mechanical seal replacement can be used for:
– Grundfos CR pump maintenance
– Grundfos CRN pump repair
– Vertical multistage pump seal replacement
– Water supply and pressure boosting pumps
– Industrial circulation pumps
– Boiler feed and hot water service by confirmation
– Pump repair workshops and distributor replacement stock
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Why choose this Grundfos cartridge seal
Easier installation for pump repair
The cartridge-style structure keeps the sealing components in one pre-assembled unit. This helps reduce handling errors and makes replacement work more consistent during pump maintenance.
Material options for different liquids
Different pump applications require different face and elastomer materials. Silicon carbide, carbon graphite, EPDM, FKM, Viton, SS304, and SS316 options can be selected according to water quality, temperature, and chemical exposure.
Confirmation before supply
Grundfos pumps may use different seal versions even when the pump family looks similar. Fluid Tech Service can confirm the replacement according to pump model, seal size, old seal photos, sample, or technical drawing.
Suitable for maintenance companies and distributors
This replacement seal can support pump repair companies, industrial maintenance teams, and distributors who need a reliable alternative supply for Grundfos pump seal service.
Production Process
Production Line
Equipment
FAQ
Is this seal an original Grundfos seal?
No. This page is for a replacement cartridge mechanical seal supplied by Fluid Tech Service. It is intended for pump maintenance and replacement use where the structure and size match the existing Grundfos pump seal.
Which Grundfos pumps can use this 43mm cartridge seal?
It can be confirmed for CR, CRN, and related vertical multistage pump applications. Please provide the pump model and old seal photos before ordering because different pump versions may use different seal structures.
What does 43mm mean on this seal page?
The page focuses on a 43 mm cartridge mechanical seal size. The final fit should still be confirmed by the old seal, shaft size, pump model, or drawing.
Can you supply HQQE or HQQV material?
Yes. HQQE and HQQV material configurations can be checked by request. Please send the old seal material code or working medium so the correct face and elastomer combination can be confirmed.
What photos should I send before quotation?
Please send clear front, side, back, and installed-position photos of the old seal. If possible, include shaft size, outside diameter, total height, and any stamped code.