• Vibration Damping: The multi-ply bellow construction dampens the high-frequency vibrations often found in high-speed boiler feed pumps.
• Hydrodynamic Face Grooves (Optional): Faces can be laser-grooved to promote fluid film formation, preventing dry running in hot water.
Key Features
• Hot Water Specialist: Specifically tuned for the low-lubricity, high-pressure environment of boiler feed water.
• No Rubber Degradation: Eliminates EPDM degradation issues at high temperatures (>150°C), ensuring long-term reliability in steam generation plants.
• Dynamic Tracking: The high flexibility of the bellow allows the seal face to track shaft movements caused by thermal expansion or pump vibration.
Technical Specs | Materials | ||
Mediums | Oil, light hydrocarbon, aromatic hydrocarbon, organic solvents, weak acids, alkali, Ammonia, etc. | Stationary Ring | Sic/TC |
Temperature | -75℃ to 400℃ | Rotary Ring | Carbon/Sic/TC |
Pressure | ≤2.0MPa (Single), ≤6.0MPa (Double) | Secondary Seal | Graphite |
Speed | ≤23m/s | Spring and Metal Part | Stainless Steel |
Product Specifications
| Size/inch D1 | Size Code | D3 | L1 |
| 0.750 | 0191 | 41.28 | 58.72 |
| 0.875 | 0222 | 44.45 | 59.51 |
| 1.000 | 0254 | 47.63 | 59.51 |
| 1.125 | 0286 | 50.80 | 60.33 |
| 1.250 | 0317 | 53.98 | 60.33 |
| 1.375 | 0349 | 57.15 | 62.69 |
| 1.500 | 0381 | 60.33 | 63.50 |
| 1.625 | 0412 | 63.50 | 63.50 |
| 1.750 | 0444 | 66.68 | 64.29 |
| 1.875 | 0476 | 69.85 | 64.29 |
| 2.000 | 0508 | 73.03 | 65.07 |
| 2.125 | 0539 | 76.20 | 65.07 |
| 2.250 | 0571 | 82.55 | 69.85 |
| 2.375 | 0603 | 85.73 | 70.64 |
| 2.500 | 0635 | 88.90 | 70.64 |
| 2.625 | 0666 | 93.65 | 73.03 |
| 2.750 | 0698 | 96.82 | 76.20 |
| 2.875 | 0730 | 101.60 | 76.20 |
| 3.000 | 0762 | 104.78 | 76.20 |
| 3.125 | 0794 | 107.95 | 76.20 |
| 3.250 | 0826 | 111.13 | 76.20 |
| 3.375 | 0857 | 114.30 | 76.20 |
| 3.500 | 0889 | 117.48 | 76.20 |
| 3.625 | 0921 | 120.65 | 76.20 |
| 3.750 | 0953 | 123.83 | 76.20 |
Workshop
This workshop is equipped with professional processing equipment and integrated with standardized material warehousing management, enabling a one-stop production process from precision machining to finished product delivery. It ensures part machining accuracy and production efficiency, meeting various high-specification manufacturing requirements.
Product Research, Development and Testing
Our Product R&D and Testing focuses on optimizing seal performance through advanced simulation and material analysis. All seals undergo rigorous trials, including thermal cycling and pressure tests, to ensure durability, minimal leakage, and long service life in demanding industrial environments.
Industry Solutions
Case Study
Power Station BFP: A boiler feed pump was leaking every 6 months. We upgraded the seal to our Metal Bellows model with Hot Water Carbon faces. The superior tracking ability of the bellow accommodated the shaft deflection, doubling the MTBF.
Testimonials
These seals handle the thermal shock of our boiler feed system perfectly. No more leaks during startup or shutdown.
—Power Plant Supervisor, India
FAQs about Metal Bellows Seals for High Temperature Pumps
Q: Why does hot water damage standard seals?
A: Hot water has very low viscosity and poor lubrication properties. It can "flash" (turn to steam) at the seal face, blowing open standard faces. Our bellow seal uses balanced geometry and specific materials to maintain a stable liquid film.
Our company is specialized in the production of sealing materials, mechanical seals , cartridge seals.
E-mail: gechacha@aliyun.com
Mobile: +86-18758835650
WhatsApp: +86-18758835650
Add: No8-2, Jinsha road Yuelin Street, Fenghua District, Ningbo, Zhejiang
