High Pressure Grundfos Pump Mechanical Seal CR CRN Multistage Pump
The 3MPa high pressure Grundfos pump mechanical seal is a precision-engineered direct replacement designed for Grundfos CR and CRN multistage centrifugal pumps with 12 mm and 16 mm shafts. It matches Grundfos OEM dimensions exactly, which means the Grundfos pump mechanical seal drops into the existing stuffing box without any pump modification, saving downtime and maintenance cost.
Rated for working pressure up to 3MPa and media temperature from -20°C to 180°C, this high pressure Grundfos pump mechanical seal is built for boosting systems, water supply, irrigation, HVAC and industrial circulation duties where standard seals lose stability under pressure surges.
Reliability comes from material engineering. The 3MPa high pressure rating is achieved through a balanced seal face design that keeps hydraulic load stable under pressure surges. The spring unit is isolated from the pumped media, preventing sticking or clogging even in poor lubrication conditions.
| Parameter | Value |
|---|---|
| Shaft Diameter | 12 mm / 16 mm |
| Working Pressure | up to 3 MPa |
| Media Temperature | -20 °C ~ 180 °C |
| Sliding Velocity | ≤ 15 m/s |
| Rotary Ring | Carbon / Silicon Carbide / Tungsten Carbide / Ceramic |
| Stationary Ring | Carbon / Silicon Carbide / Tungsten Carbide / Ceramic |
| O-Ring | EPDM / NBR / AFLAS / Kalrez / PTFE |
| Spring and Metal Parts | SUS304 / SUS316 / Hastellow C / 904L |
| Seal Type | Single Spring, O-Ring Type |
| Compatible Pumps | Grundfos CR, CRN, CRK, CH, CM, NBG, MTH, HPK series |
- Grundfos CR / CRN multistage centrifugal pumps
- Water supply and pressure boosting systems
- Irrigation and agricultural pumping
- HVAC circulation and chilled water systems
- Industrial cleaning, reverse osmosis and filtration
- 100% compatible with Grundfos OEM dimensions and specifications
- 3MPa high pressure rating for demanding multistage pump duties
- Easy replacement without dismantling the pump body
- Spring unit isolated from media, no sticking or clogging
- Seal face locked by square pin for safe, fracture-free operation
- OEM/ODM and cross-reference service for Grundfos part numbers
As a sealing factory established in 1992, we supply this 3MPa high pressure Grundfos pump mechanical seal to pump distributors, maintenance contractors and water treatment projects worldwide. Each seal is backed by a complete quality management system, and samples are available before mass production.
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