• Friction-Welded Faces: In some configurations, the ceramic face is bonded directly to the seat holder to ensure stability under thermal cycling.
• Optimized Spring Rate: The coil spring force is calibrated to maintain face contact without causing excessive wear on the ceramic face during dry-run startups.
Key Features
• Roten Standard Replacement: A precise aftermarket equivalent for Roten Type 2, Type 2a, and Type 5 mechanical seals commonly found in European water pumps (Calpeda, Pedrollo, Ebara).
• High-Purity Alumina: Utilizes 99.5% Alumina Ceramic stationary seats, offering superior hardness and thermal shock resistance compared to standard commercial ceramics.
• Short Axial Length: Designed to fit the compact stuffing boxes typical of mass-produced centrifugal water pumps.
Product Specifications
Al₂O₃ Ceramic Physical Property | ||||
Technical Parameter | Unit | 95% | 99% | 99.5% |
Content Of Al₂O₃ | % | 95 | 99 | 99.5 |
Density | g/cm³ | 3.7 | 3.88 | 3.9 |
Hardness | HRA | 85 | 88 | 90 |
Porosity Rate | % | <0.4 | <0.2 | <0.15 |
Fractural Strength | MPa | 250 | 310 | 350 |
Coefficient Of Heat Expansion | 10⁻⁶/K | 5.5 | 5.3 | 5.2 |
Thermal Conductivity | W/M.K | 27.8 | 26.7 | 26 |
TC physical property | |||||||
Technical Parameter | Unit | YWN6 | YWN8 | YG6 | YG8 | DYNT60 | |
Composition | WC | % | 94 | 92 | 94 | 92 | |
Ni | % | 6 | 8 | ||||
Co | % | 6 | 8 | ||||
Density | g/cm³ | 14.5-14.9 | 14.4-14.8 | 14.6-15 | 14.5-14.9 | 6.5-6.8 | |
Hardness | HRA | 88.5 | 88 | 89.5 | 89 | 90 | |
Fractural Strength | MPa | 1490 | 1470 | 1421 | 1470 | 1480 | |
Heat Expansion Co-efficient | 10⁻⁶/K | 5.2 | 5.3 | 5 | 5.1 | 7.5 | |
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
Domestic Water Booster: A residential building's water booster pumps (using Roten Type 2) were leaking. We supplied these Alumina/Carbon replacements. The high-purity ceramic resisted the abrasive micro-particles in the city water supply, restoring system pressure.
Testimonials
These are the best value replacements for Roten seals we've found. They fit our Calpeda pumps perfectly and the ceramic quality is visibly better.
—Pump Repair Technician, Italy
FAQs about Metal Bellows Seals for High Temperature Pumps
Q: Is Alumina Ceramic better than standard steatite ceramic?
A: Yes, significantly. 99.5% Alumina is harder, has better chemical resistance, and conducts heat much better than low-grade steatite ceramics, reducing the risk of heat cracking.
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
