• Dry-Run Tolerance (with Carbon): When paired with Carbon, the Alumina face handles the intermittent dry running often found in batch mixing processes better than SiC/SiC.
• Chemical Inertness: Alumina Ceramic is inert to most acids and food products, making it ideal for food and chemical mixing tanks.
Key Features
• Mixer-Specific Design: Engineered to handle the radial runout and slow speeds typical of top-entry or side-entry mixers and agitators.
• Alumina Ceramic Faces: High-purity ceramic offers excellent chemical resistance and hardness at an economical price point.
• Double O-Ring Seat: Features a robust stationary seat with O-ring mounting to dampen vibrations from the mixer shaft.
Technical Specs | Materials | ||
Mediums | Water, oil, weak acids, weak alkali, etc. | Stationary Ring | Carbon/Ceramic/Sic/TC |
Pressure | ≤1.2MPa | Rotary Ring | Carbon/Sic/TC/SUS304 |
Temperature | -20℃ to 180℃ | Secondary Seal | NBR/EPDM/Viton |
Speed | ≤15m/s | Spring and Metal Part | Stainless Steel |


Product Specifications
| Metric Shaft Size D1 | Size Code | D3 | D7 | L1 | L4 |
| 20 | 0200 | 34 | 35 | 41 | 13 |
| 22 | 0220 | 36 | 37 | 41 | 13 |
| 24 | 0240 | 38 | 39 | 43 | 13 |
| 25 | 0250 | 39 | 40 | 43 | 13 |
| 28 | 0280 | 42 | 43 | 45 | 13 |
| 30 | 0300 | 44 | 45 | 45 | 13 |
| 33 | 0330 | 47 | 48 | 45 | 13 |
| 35 | 0350 | 49 | 50 | 49 | 13 |
| 38 | 0380 | 54 | 56 | 53 | 13 |
| 40 | 0400 | 56 | 58 | 55 | 13 |
| 43 | 0430 | 59 | 61 | 55 | 13 |
| 45 | 0450 | 61 | 63 | 55 | 13 |
| 48 | 0480 | 64 | 66 | 55 | 13 |
| 50 | 0500 | 66 | 68 | 60 | 13 |
| 53 | 0530 | 69 | 71 | 61 | 13 |
| 55 | 0550 | 71 | 73 | 61 | 13 |
| 58 | 0580 | 76 | 79 | 63 | 16 |
| 60 | 0600 | 78 | 81 | 63 | 16 |
| 63 | 0630 | 81 | 84 | 63 | 16 |
| 65 | 0650 | 83 | 86 | 67 | 16 |
| 70 | 0700 | 90 | 92 | 68 | 16 |
| 75 | 0750 | 95 | 97 | 72 | 16 |
| 80 | 0800 | 100 | 105 | 72 | 16 |
| 85 | 0850 | 105 | 110 | 77 | 16 |
| 90 | 0900 | 112 | 115 | 77 | 16 |
| 95 | 0950 | 119 | 120 | 82 | 16 |
| 100 | 1000 | 124 | 125 | 82 | 16 |
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
Food Mixing Tank: A food plant mixer was leaking product. We installed this Alumina/Carbon seal with FDA EPDM O-rings. The ceramic resisted the acidic fruit mix, and the seal handled the shaft wobble, ensuring a hygienic process.
Testimonials
Simple, rugged, and food-safe. These ceramic seals are perfect for our batch mixing tanks.
—Production Manager, Food Processing
FAQs about Metal Bellows Seals for High Temperature Pumps
Q: Can ceramic handle mixer vibration?
A: Alumina Ceramic is strong but brittle. For mixers with extreme vibration, we recommend upgrading to Silicon Carbide. However, for standard agitation, our O-ring mount provides enough damping for Ceramic to work reliably.

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