• Balanced for Pressure: The seal face geometry is hydraulically balanced, allowing it to handle pressure spikes and hammer in hygienic process lines without opening.
• Simplified Installation: The unitized design means there are no loose springs or O-rings to assemble, preventing installation errors on the production floor.
Key Features
• 100% Compatible: A direct, drop-in replacement for Alfa Laval's proprietary single mechanical seals used in their LKH, SolidC, and MR series centrifugal pumps.
• Hygiene First: Designed with a smooth, open profile to facilitate Clean-In-Place (CIP) processes, eliminating bacteria traps found in standard seals.
• FDA Certified Materials: All wetted components (Carbon, SiC, EPDM) are fully FDA compliant, ensuring safety for food and beverage production.
Technical Specs | Materials | ||
Mediums | Water, oil and weakly-corrosive mediums | Stationary Ring | Ceramic/Sic/TC |
Pressure | ≤1.0MPa | Rotary Ring | Carbon/Sic/TC |
Temperature | -20℃ to 120℃ | Secondary Seal | NBR/EPDM/Viton |
Speed | ≤15m/s | Spring and Metal Part | Stainless Steel |


Product Specifications
| D1 (mm) | Size Code | D3 | D7 | L1 | L4 |
| 8 | 0008 | 18.2 | 21.0 | 11.2 | 7.0 |
| 9 | 0009 | 18.2 | 24.0 | 16.2 | 7.0 |
| 10 | 0100 | 20.6 | 24.0 | 16.2 | 7.0 |
| 11 | 0110 | 20.6 | 24.0 | 16.2 | 7.0 |
| 12 | 0120 | 21.8 | 26.0 | 17.2 | 7.0 |
| 13 | 0130 | 21.8 | 26.0 | 17.2 | 7.0 |
| 14 | 0140 | 26.4 | 28.0 | 18.2 | 7.0 |
| 15 | 0150 | 26.4 | 28.0 | 18.2 | 7.0 |
| 16 | 0160 | 26.4 | 32.0 | 19.2 | 8.0 |
| 17 | 0170 | 29.5 | 32.0 | 19.2 | 8.0 |
| 18 | 0180 | 29.5 | 35.0 | 19.2 | 8.0 |
| 19 | 0190 | 29.5 | 35.0 | 19.2 | 8.0 |
| 20 | 0200 | 31.6 | 38.0 | 20.2 | 8.0 |
| 22 | 0220 | 33.6 | 40.0 | 20.2 | 8.0 |
| 25 | 0250 | 39.6 | 44.0 | 20.2 | 9.0 |
| 28 | 0280 | 45.0 | 46.0 | 21.2 | 9.0 |
| 30 | 0300 | 46.6 | 50.0 | 22.2 | 9.0 |
| 32 | 0320 | 46.6 | 54.0 | 24.2 | 9.0 |
| 35 | 0350 | 50.8 | 58.0 | 26.2 | 10.0 |
| 38 | 0380 | 54.3 | 60.0 | 27.2 | 10.0 |
| 40 | 0400 | 57.3 | 64.0 | 28.2 | 10.0 |
| 45 | 0450 | 61.3 | 66.0 | 30.2 | 10.0 |
| 50 | 0500 | 67.8 | 72.0 | 32.2 | 10.0 |
| 3/8" | 0095 | 23.50 | 22.23 | 22.20 | 6.40 |
| 1/2" | 0127 | 26.00 | 25.40 | 22.20 | 6.40 |
| 5/8" | 0158 | 30.00 | 31.75 | 23.80 | 8.70 |
| 3/4" | 0190 | 32.50 | 34.93 | 23.80 | 8.70 |
| 7/8" | 0222 | 37.50 | 38.10 | 25.40 | 8.70 |
| 1" | 0254 | 44.00 | 41.28 | 27.00 | 9.50 |
| 1 1/8" | 0286 | 48.00 | 44.45 | 28.60 | 9.50 |
| 1 1/4" | 0317 | 50.00 | 47.63 | 28.60 | 9.50 |
| 1 3/8" | 0349 | 54.50 | 50.80 | 30.20 | 9.50 |
| 1 1/2" | 0381 | 58.50 | 53.98 | 30.20 | 9.50 |
| 1 5/8" | 0412 | 64.00 | 60.33 | 36.50 | 11.10 |
| 1 3/4" | 0444 | 67.00 | 63.50 | 36.50 | 11.10 |
| 1 7/8" | 0476 | 71.00 | 66.68 | 39.70 | 11.10 |
| 2" | 0508 | 73.50 | 69.85 | 39.70 | 11.10 |
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
Dairy Plant Upgrade: A milk processing plant was spending too much on OEM spare parts for their LKH pumps. We supplied these compatible replacements. The seals handled the daily hot caustic wash cycles perfectly, reducing their annual MRO spend by 35%.
Testimonials
These fit our LKH-10 and LKH-60 pumps perfectly. We can't tell the difference from the original, except for the better price.
—Maintenance Manager, Dairy Cooperative
FAQs about Metal Bellows Seals for High Temperature Pumps
Q: Is this seal suitable for CIP/SIP cycles?
A: Yes, absolutely. The materials (SiC and FDA EPDM) are specifically chosen to withstand the rapid temperature changes and aggressive chemicals used in Clean-In-Place and Sterilization-In-Place procedures.

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