• Micro-Welding Technology: We utilize advanced laser micro-welding to fabricate these small bellows with consistent spring rates and high flexibility.
• Direct Shaft Fit: Designed to fit standard metric tolerance shafts directly without the need for complex sleeves.
Key Features
• Miniature Precision: High-performance metal bellow technology scaled down for small-diameter shafts (12-18mm), offering premium reliability for compact pumps.
• Space-Saving: Extremely short working length fits into tight micro-pump housings where standard seals won't fit.
• Pure Construction: No glue or adhesives; fully welded metal structure ensures chemical purity and temperature resistance.
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
Laboratory Circulation Pump: A lab equipment manufacturer needed a durable seal for a 14mm shaft pump handling hot solvents. Rubber seals failed too often. Our 14mm Metal Bellow Seal provided the chemical resistance and longevity required for their warranty period.
Testimonials
Hard to find metal bellows this small with good quality. Miaoyu's 16mm seals are precise and consistent.
—Precision Equipment Manufacturer, Germany
FAQs about Metal Bellows Seals for High Temperature Pumps
Q: Are these standard sizes?
A: Yes, they conform to DIN 24960 (EN 12756) short working length standards (e.g., L1K series), making them direct replacements for many European OEM seals.
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
