• Oil-Lubricated Design: The face geometry is optimized to maintain a lubrication film from the oil chamber, preventing dry running friction on the ceramic face.
• Resilient Mounting: The ceramic seat is mounted in a generous rubber cup to absorb the vibrations inherent in submersible pump operation.
Key Features
• Submersible Specific: Designed for Grundfos AP, KP, and Unilift series light-duty submersible drainage pumps.
• Cost-Effective Corrosion Resistance: Alumina Ceramic provides excellent resistance to slightly acidic or alkaline wastewater found in domestic drains, where expensive SiC is overkill.
• Dual Seal Compatible: Often used as the "Upper" seal (oil chamber side) in larger Grundfos submersibles to provide a cost-effective barrier.
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
Basement Drainage: A flood control pump failed due to seal wear. The OEM replacement was costly. We installed our Alumina/Ceramic replacement. The ceramic face handled the silty water without scoring, and the pump has been operational for 3 wet seasons.
Testimonials
Perfect fit for the Unilift pumps. The ceramic face is tough enough for greywater and saves us money on repairs.
—Plumbing Contractor, UK
FAQs about Metal Bellows Seals for High Temperature Pumps
Q: Can this replace the SiC seal in my pump?
A: It fits dimensionally, but Ceramic is not as hard as Silicon Carbide (SiC). If your pump handles heavy sand or slurry, stick with SiC. For standard drainage or greywater, Ceramic is a cost-effective alternative.
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
