BT-FN Water Pump Mechanical Shaft Seal 155 Type Bellow Mechanical Seal
High-quality mechanical seal featuring multiple springs available in various elastomers for handling industrial fluids. Unified construction design with snap ring assembly for easy on-site repair and maintenance.
The BT-FN combines a spring-loaded ceramic face with traditional pusher mechanical seal technology. Known for competitive pricing and wide application range, making the 155(BT-FN) series ideal for submersible pumps, clean water pumps, domestic appliances, and gardening equipment.
Product Specifications
Operational Conditions
- Temperature Range: -20°C to +150°C
- Maximum Pressure: ≤1.0MPa
- Maximum Speed: ≤10m/s
Material Composition
Stationary Ring: Carbon, Silicon Carbide
Rotary Ring: Ceramic, Silicon Carbide
Secondary Seal: NBR, EPDM, Viton
Spring & Metal Parts: Steel
Applications
Suitable for clean water, sewage water, oil, and other moderately corrosive fluids in blower pumps, diving pumps, and circulating pumps.
Technical Parameters
| Parameter |
Specification |
| Temperature |
-20°C ~ 150°C |
| Pressure |
Less than 1.0MPa |
| Speed |
Less than 10m/s |
| Stationary Ring |
Ceramic/SiC/TC |
| Rotary Ring |
Carbon/SiC/TC/SUS304 |
| Secondary Seal |
NBR/EPDM/Viton |
| Spring & Other Parts |
SUS304/SUS316L |
Dimensional Specifications
| MODEL |
D1 |
D3 |
D6 |
D7 |
L |
L3 |
L4 |
| 155-10 | 10 | 20.0 | 14.0 | 18.1 | 20.5 | 15 | 5.5 |
| 155-11 | 11 | 22.0 | 16.5 | 20.6 | 23.5 | 18 | 5.5 |
| 155-12 | 12 | 22.0 | 16.5 | 20.6 | 23.5 | 18 | 5.5 |
| 155-13 | 13 | 25.0 | 19.0 | 23.1 | 28.0 | 22 | 6.0 |
| 155-14 | 14 | 25.0 | 19.0 | 23.1 | 28.0 | 22 | 6.0 |
| 155-15 | 15 | 29.0 | 21.0 | 26.9 | 29.0 | 22 | 7.0 |
| 155-16 | 16 | 29.0 | 21.0 | 26.9 | 30.0 | 23 | 7.0 |
| 155-17 | 17 | 29.0 | 21.0 | 26.9 | 30.0 | 23 | 7.0 |
| 155-18 | 18 | 33.0 | 25.0 | 30.9 | 32.0 | 24 | 8.0 |
| 155-19 | 19 | 33.0 | 25.0 | 30.9 | 33.0 | 25 | 8.0 |
| 155-20 | 20 | 33.0 | 25.0 | 30.9 | 33.0 | 25 | 8.0 |
| 155-21 | 21 | 38.0 | 30.0 | 35.4 | 33.0 | 25 | 8.0 |
| 155-22 | 22 | 38.0 | 30.0 | 35.4 | 33.0 | 25 | 8.0 |
| 155-23 | 23 | 38.0 | 30.0 | 35.4 | 35.0 | 27 | 8.0 |
| 155-24 | 24 | 38.0 | 30.0 | 35.4 | 35.0 | 27 | 8.0 |
| 155-25 | 25 | 40.0 | 33.0 | 38.2 | 35.5 | 27 | 8.5 |
| 155-28 | 28 | 46.0 | 38.0 | 43.3 | 38.0 | 29 | 9.0 |
| 155-29 | 29 | 46.0 | 38.0 | 43.3 | 39.0 | 30 | 9.0 |
| 155-30 | 30 | 46.0 | 38.0 | 43.3 | 39.0 | 30 | 9.0 |
| 155-32 | 32 | 46.0 | 38.0 | 43.3 | 39.0 | 30 | 9.0 |
| 155-33 | 33 | 48.0 | 45.0 | 53.5 | 50.5 | 39 | 11.5 |
| 155-35 | 35 | 50.0 | 45.0 | 53.5 | 50.5 | 39 | 11.5 |
| 155-38 | 38 | 58.0 | 52.0 | 60.5 | 50.5 | 39 | 11.5 |
| 155-40 | 40 | 58.0 | 52.0 | 60.0 | 50.5 | 39 | 11.5 |