Direct Replacement: Interchangeable with AES/AESSEAL B07X series
Material: Premium 316SS, High-Quality Carbon/Silicon Carbide Faces
Construction: Compact, Single Spring Pusher Type Seal
Performance: Reliable, Leak-free for General Purpose Pumps
Service: Designed for Ease of Maintenance and Field Service
Origin: Manufacturer-Direct from China
This AES mechanical seal is a precision-engineered, drop-in pump mechanical seal replacement for the AESSEAL® B07X series—used widely in general-purpose centrifugal pumps handling water, coolants, light oils, and mild chemicals. Manufactured to original envelope dimensions with hydraulically balanced faces, our B07X replacement seal offers extended life in higher-pressure applications while eliminating the need for pump modification.
Key Features
• Balanced High-Pressure: A heavy-duty, hydraulically balanced pump mechanical seal replacement for the AES B07X series, capable of handling higher pressures than standard unbalanced O-ring pusher seals—ideal for multi-stage and high-head pumps.
• Non-Fretting: Static O-ring secondary sealing prevents fretting (shaft grooving), a common failure in dynamic pusher seals. Protects expensive pump shafts when retrofitting this AES mechanical seal.
• Versatile O-Ring: Standard O-ring grooves accept easy upgrades (Viton®, EPDM, Kalrez®/FFKM) to match aggressive chemicals—giving you a customizable pump mechanical seal replacement for varied process media.
• Balanced Geometry: Stepped face design reduces hydraulic closing force, minimizing face heat and wear in continuous-duty B07X applications.
• Robust Drive: Sturdy drive lugs transmit torque reliably under high-viscosity start-up or stalled conditions, ensuring the AES mechanical seal replacement stays engaged during pump surges.
Product Introduction
The AES B07X Pump Mechanical Seal Replacement is a high-quality, precision-engineered component designed as a direct, drop-in replacement for the widely used AESSEAL® B07X series of mechanical seals. This robust mechanical seal is built for reliability and durability in general-purpose centrifugal pumps handling clean, non-abrasive fluids such as water, coolants, light oils, and mild chemicals.
Why Choose MIAOYU as Your B07X Supply Partner
True Manufacturer-Direct Pricing: Eliminate middlemen — improve your margin with factory-original B07X replacements at competitive wholesale rates.
Distributor & Private Label Support: Offer your own branded boxes, laser-etched part numbers, customized documentation and barcode labels.
Broad Size Coverage & Ready Stock: Shaft sizes from 1/2" to 3" (12–75 mm) in stock; mixed-size consolidation shipments available for container optimization.
Consistent Dimensional Interchangeability: 100% verified against AESSEAL® B07X envelope dimensions — zero pump modification required, protects your end-user satisfaction.
Reliable Lead Time & Global Shipping: Standard orders ship within 3–7 working days; sea/air freight consolidation to USA, Europe, Middle East & Southeast Asia.
Technical Backup for Your Customers: Cross-reference support, material upgrade advice (SiC/TC faces, FKM/EPDM/Kalrez®), and installation guidance — we help you look professional to your clients.
Technical Specs | Materials | ||
Mediums | Water, oil and weakly-corrosive mediums | Stationary Ring | Ceramic/Sic/TC |
Pressure | ≤1.4MPa | 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 (inch) | Size Code | D1 (mm) | Size Code | D3 | D7 | L1 | L4 |
| 0.500 | 0127 | 12 | 0120 | 30.14 | 25.40 | 20.64 | 7.93 |
| 14 | 0140 | 33.32 | 31.75 | 22.23 | 10.30 | ||
| 0.625 | 0158 | 16 | 0160 | 33.32 | 31.75 | 22.23 | 10.30 |
| 0.750 | 0191 | 18 | 0180 | 36.50 | 34.93 | 22.23 | 10.30 |
| 20 | 0200 | 39.67 | 38.10 | 23.80 | 10.30 | ||
| 0.875 | 0222 | 22 | 0220 | 39.67 | 38.10 | 23.80 | 10.30 |
| 24 | 0240 | 45.50 | 41.28 | 25.40 | 11.10 | ||
| 1.000 | 0254 | 25 | 0250 | 45.50 | 41.28 | 25.40 | 11.10 |
| 1.125 | 0286 | 28 | 0280 | 48.50 | 44.44 | 26.97 | 11.10 |
| 30 | 0300 | 52.37 | 47.63 | 26.97 | 11.10 | ||
| 1.250 | 0317 | 32 | 0320 | 52.37 | 47.63 | 26.97 | 11.10 |
| 33 | 0330 | 56.00 | 50.80 | 28.58 | 11.10 | ||
| 1.375 | 0349 | 35 | 0350 | 56.00 | 50.80 | 28.58 | 11.10 |
| 1.500 | 0381 | 38 | 0380 | 59.20 | 53.98 | 28.58 | 11.10 |
| 1.625 | 0412 | 40 | 0400 | 67.00 | 60.33 | 34.93 | 12.70 |
| 43 | 0430 | 69.85 | 63.50 | 34.93 | 12.70 | ||
| 1.750 | 0444 | 45 | 0450 | 69.85 | 63.50 | 34.93 | 12.70 |
| 1.875 | 0476 | 48 | 0480 | 73.03 | 66.68 | 38.10 | 12.70 |
| 2.000 | 0508 | 50 | 0500 | 76.20 | 69.85 | 38.10 | 12.70 |
| 2.125 | 0539 | 53 | 0530 | 82.55 | 76.20 | 42.85 | 14.28 |
| 2.250 | 0571 | 55 | 0550 | 85.73 | 79.38 | 42.85 | 14.28 |
| 2.375 | 0603 | 60 | 0600 | 88.90 | 82.55 | 46.02 | 14.28 |
| 2.500 | 0635 | 63 | 0630 | 92.08 | 85.73 | 46.02 | 14.28 |
| 2.625 | 0666 | 65 | 0650 | 98.43 | 85.73 | 49.20 | 15.90 |
| 2.750 | 0698 | 70 | 0700 | 101.60 | 88.90 | 49.20 | 15.90 |
| 2.875 | 0730 | 73 | 0730 | 104.78 | 95.25 | 52.37 | 15.90 |
| 3.000 | 0762 | 75 | 0750 | 107.95 | 98.43 | 52.37 | 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 pump mechanical seal replacement 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
Boiler Feed: A high-pressure boiler feed pump seal was failing due to face opening. We installed this B07X Balanced Replacement. The balanced design maintained face contact during pressure spikes, ensuring reliable operation.
Testimonials
We use the B07X replacement for our high-pressure multistage pumps. It's a solid, balanced seal that handles the load without overheating.
—Plant Engineer, Power Generation
FAQs
Q: Does this require a stepped shaft?
A: Yes, as a balanced seal, it typically requires a stepped shaft or sleeve to achieve the hydraulic balance area. If your shaft is straight, we can supply a balanced sleeve with the seal.
Q: Is this seal truly a direct replacement for my existing AESSEAL B07X seal?
A: Yes. The MIAOYU AES B07X Pump Mechanical Seal Replacement is engineered to be a direct, dimensionally identical interchange for the standard AESSEAL® B07X mechanical seal. It is designed to match the shaft/bore dimensions, face materials, and overall configuration, allowing for a straightforward replacement in compatible pump models.
Q: Do you cross-reference other AES or John Crane equivalents?
A: Yes. We supply multiple AES-type replacements and can cross-reference by OEM part number. Contact us with your existing seal tag photo for confirmation.

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