• Edge-Welded Bellows: We use precision edge-welded leaflets which offer a higher stroke-to-length ratio and better fatigue life compared to formed bellows.
• Damped Vibration: The bellow structure inherently dampens stick-slip vibration, preventing face chattering at high temperatures.
Key Features
• High-Heat Specialist: Specifically designed for heat transfer oils, hot hydrocarbons, and other fluids exceeding 200°C.
• Eliminates Elastomers: Replaces temperature-sensitive O-rings with flexible graphite (Grafoil) static gaskets and a welded metal bellow core.
• Self-Cleaning: The rotation of the bellow creates a centrifugal effect that prevents coke or sludge accumulation between the convolutions.
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 |
| 1.000 | 0254 | 41.28 | 38.89 |
| 1.125 | 0286 | 44.45 | 39.67 |
| 1.250 | 0317 | 47.63 | 40.46 |
| 1.375 | 0349 | 50.80 | 40.46 |
| 1.500 | 0381 | 53.98 | 40.46 |
| 1.625 | 0412 | 57.15 | 40.46 |
| 1.750 | 0444 | 60.33 | 41.28 |
| 1.875 | 0476 | 63.50 | 41.28 |
| 2.000 | 0508 | 66.68 | 42.06 |
| 2.125 | 0539 | 69.85 | 42.06 |
| 2.250 | 0571 | 73.03 | 43.66 |
| 2.375 | 0603 | 76.20 | 43.66 |
| 2.500 | 0635 | 82.55 | 44.45 |
| 2.625 | 0666 | 85.73 | 45.24 |
| 2.750 | 0698 | 88.90 | 45.24 |
| 2.875 | 0730 | 93.65 | 47.63 |
| 3.000 | 0762 | 96.82 | 47.63 |
| 3.125 | 0794 | 101.60 | 47.63 |
| 3.250 | 0826 | 104.78 | 47.63 |
| 3.375 | 0857 | 107.95 | 47.63 |
| 3.500 | 0889 | 111.13 | 47.63 |
| 3.625 | 0921 | 114.30 | 47.63 |
| 3.750 | 0953 | 117.48 | 47.63 |
| 3.875 | 0984 | 120.65 | 47.63 |
| 4.000 | 1016 | 123.83 | 47.63 |
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
Thermal Oil System: A heat transfer pump operating at 280°C was leaking due to O-ring vulcanization. We replaced it with this Metal Bellows Seal. The static graphite seals held the temperature, and the pump has run leak-free for 3 years.
Testimonials
We upgraded all our hot oil pumps to these metal bellows seals. We haven't changed a seal in over two years.
—Reliability Manager, Asphalt Plant
FAQs about Metal Bellows Seals for High Temperature Pumps
Q: Do I need cooling water for this seal?
A: Generally, no. This seal is designed to run hot. However, we recommend a steam quench (Plan 62) on the atmospheric side to prevent oxidation (coking) of any small leakage, which could clog the seal.
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
