Grundfos Cartridge Mechanical Seal CR/CRN/CRI 1/3/5 Cubic Meter GLF-C-12mm
Water Pump Model Pairing Specifications
| Model |
D1 |
D2 |
D7 |
M |
L |
L1 |
L3 |
| GLF - 12 |
12 |
25 |
29 |
M28*1.5 |
55 |
49 |
30 |
| GLF - 16 |
16 |
30.5 |
34 |
M33*1.5 |
57.5 |
51 |
30.5 |
| GLF - 22 |
22 |
39.5 |
50 |
M49*1.5 |
72 |
55 |
35.0 |
Technical Parameters
| Parameter |
Specification |
| Temperature |
-30℃ to +200℃ |
| Pressure |
≤1.2 MPa |
| Speed |
≤10 m/s |
| Medium |
Acid, alkali, and corrosive liquids |
Material Composition
| Component |
Material |
| Rotary Ring |
SiC/VIT |
| Stationary Ring |
Carbon/SiC/TC |
| Spring |
SUS304/SUS316 |
| Stationary Seat |
SUS304/SUS316 |
| Secondary Seal |
FKM |
| Rotary Ring Holder |
SUS304/SUS316 |
Product Overview
Mechanical Seal For Grundfos Pump Seal GLF 12MM, 16MM, 22MM Cartridge Mechanical Seal
Grundfos CR Replacement Cartridge Mechanical Seals with standard shaft sizes: 12mm, 16mm, 22mm
Operating Range
Cartridge Pump Seal for Grundfos mechanical seal applications
Equivalent with type H, balanced cartridge O-ring seal unit with rigid torque transmission system
This seal type is assembled in a cartridge unit which makes replacement safe and easy
Similar to the type D seal, the balancing makes this O-ring seal type suitable for high-pressure applications
OEM Part Numbers
Grundfos CR1, CR3, CR5 - 12mm
OEM Part Numbers: 96455082, 96455086, 96455083, 96455087, 96455085
Grundfos CR10, CR15, CR20 - 16mm
OEM Part Numbers: 96511836, 96511840, 96511837, 96511845, 96511841
Grundfos CR32, CR35, CR64, CR90 - 22mm
OEM Part Numbers: 96416584, 96433365, 96525459, 96525490, 96436728
Materials: Silicon vs Silicon Carbide EPDM elastomers
Seal Material: SiC/SiC/EPDM
Seal Type: Grundfos Cartridge
Installation Preparation
- Shaft Outside Diameter is within tolerance ±0.05mm
- Shaft run out <0.1mm
- Shaft end float <0.13mm
- No sharp edges on the shaft over the O-ring
Note: During installation, do not scratch or damage the O-ring. If anything is damaged, please contact us to replace with a new one.
Installation Instructions
The full set of cartridge seal is cleaned and exactly passed leakage examination before sale. To avoid damage, do not disassemble and clean the parts again before fixing.
The fitting allowance between the seal and shaft is dl h6 0.8, and there should be leading-in edge at the end of shaft. The outside diameter of shaft at the position of screw should be 01 0.2mm smaller, resisting the screw over-tighten. Lubricate the shaft with oil.
Place the cartridge seal into the pump chamber, then:
- Tighten four screw bolts of flanges, ensuring the medium leading in hole "G" at the top position
- Tighten four set screws and position the shaft sleeve on the shaft
- Remove four gauge plates. Please keep them as they will be used in future installation and disassembly
- Connect the medium lead-in pipe with hole "G" to flush away the friction heat and flush the seal chamber when pump is running
Note: After complete installation, turn the shaft by hand to check for rotation. If the shaft could not rotate smoothly, the seal had been improperly installed.