• Self-Aligning: The flexible elastomer bellow automatically compensates for shaft misalignment and end-play, ensuring consistent face contact even on worn equipment.
• Bi-Directional: The single coil spring friction drive allows the seal to operate in either clockwise or counter-clockwise rotation, simplifying inventory.
Key Features
• Direct AES Replacement: A precise aftermarket equivalent for the AES W01 (Imperial/Inch) and W02 (Metric/DIN) elastomeric bellow seals.
• Non-Clogging Bellow: The smooth, full-convolution rubber bellow protects the shaft and spring from debris, preventing clogging in wastewater or slurry applications.
• Torque Drive: The bellow friction-drives the rotary face, eliminating the need for drive screws that can damage the shaft or fret the sleeve.
Technical Specs | Materials | ||
Mediums | Water, oil and weakly-corrosive mediums | Stationary Ring | Ceramic/Sic/TC |
Pressure | ≤1.4MPa | Rotary Ring | Carbon/Sic/TC |
Temperature | -20C to 120C | Secondary Seal | NBR/EPDM/Viton |
Speed | ≤15m/s | Spring and Metal Part | Stainless Steel |


Product Specifications
| D1 (inch) | Size Code | D1 (mm) | Size Code | D3 | D7 | L1 | L4 |
| 0.500 | 0127 | 12 | 0120 | 23.80 | 25.40 | 30.16 | 7.93 |
| 14 | 0140 | 27.76 | 31.75 | 33.32 | 10.30 | ||
| 0.625 | 0158 | 16 | 0160 | 27.76 | 31.75 | 33.32 | 10.30 |
| 0.750 | 0191 | 18 | 0180 | 30.94 | 34.93 | 33.32 | 10.30 |
| 20 | 0200 | 34.11 | 38.10 | 34.93 | 10.30 | ||
| 0.875 | 0222 | 22 | 0220 | 34.11 | 38.10 | 34.93 | 10.30 |
| 24 | 0240 | 38.10 | 41.28 | 39.67 | 11.10 | ||
| 1.000 | 0254 | 25 | 0250 | 38.10 | 41.28 | 39.67 | 11.10 |
| 1.125 | 0286 | 28 | 0280 | 41.28 | 44.44 | 41.28 | 11.10 |
| 30 | 0300 | 46.02 | 47.63 | 41.28 | 11.10 | ||
| 1.250 | 0317 | 32 | 0320 | 46.02 | 47.63 | 41.28 | 11.10 |
| 33 | 0330 | 48.68 | 50.80 | 42.85 | 11.10 | ||
| 1.375 | 0349 | 35 | 0350 | 48.68 | 50.80 | 42.85 | 11.10 |
| 1.500 | 0381 | 38 | 0380 | 51.85 | 53.98 | 42.85 | 11.10 |
| 1.625 | 0412 | 40 | 0400 | 58.10 | 60.38 | 50.80 | 12.70 |
| 43 | 0430 | 61.27 | 63.50 | 50.80 | 12.70 | ||
| 1.750 | 0444 | 45 | 0450 | 61.27 | 63.50 | 50.80 | 12.70 |
| 1.875 | 0476 | 48 | 0480 | 64.44 | 66.68 | 53.98 | 12.70 |
| 2.000 | 0508 | 50 | 0500 | 67.21 | 69.85 | 53.98 | 12.70 |
| 2.125 | 0539 | 53 | 0530 | 72.02 | 76.20 | 60.33 | 14.28 |
| 2.250 | 0571 | 55 | 0550 | 75.30 | 79.38 | 60.33 | 14.28 |
| 2.375 | 0603 | 60 | 0600 | 78.30 | 82.55 | 63.50 | 14.28 |
| 2.500 | 0635 | 63 | 0630 | 81.54 | 85.73 | 63.50 | 14.28 |
| 2.625 | 0666 | 65 | 0650 | 86.22 | 85.73 | 69.85 | 15.90 |
| 2.750 | 0698 | 70 | 0700 | 89.40 | 88.90 | 73.03 | 15.90 |
| 2.875 | 0730 | 73 | 0730 | 92.57 | 95.25 | 73.03 | 15.90 |
| 3.000 | 0762 | 75 | 0750 | 95.75 | 98.43 | 73.03 | 15.90 |
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
Wastewater Treatment: A municipal plant needed replacements for AES W02 seals on their submersible mixers. Our aftermarket W02 equivalents fit the DIN housings perfectly. The SiC faces handled the grit, and the non-clogging bellow prevented ragging.
Testimonials
We stock both the W01 and W02 types. They are indistinguishable from the original AES seals but help us keep our maintenance budget in check.
—Pump Repair Shop, UK
FAQs about Metal Bellows Seals for High Temperature Pumps
Q: What is the difference between W01 and W02?
A: The W01 is designed for Imperial (Inch) shaft sizes and standard ANSI stuffing boxes. The W02 is designed for Metric (Millimeter) shafts and conforms to DIN 24960 (L1k) dimensions.

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