The 8-B1 Mechanical Seal is a high-performance balanced sealing solution designed for industrial pump applications requiring enhanced stability under higher pressure conditions. It serves as a reliable replacement for AESSEAL M02S and John Crane 8B1, offering consistent sealing performance in demanding environments.
This model features a balanced design that reduces face load, improves heat dissipation, and extends seal life. It supports multiple material combinations including carbon, ceramic, silicon carbide, and stainless steel, ensuring compatibility with a wide range of fluids and operating conditions.
Engineered for durability and flexibility, the 8-B1 is ideal for industries seeking a robust, efficient, and long-lasting sealing solution for critical applications.
- Balanced mechanical seal design for higher pressure applications
- Replacement for AESSEAL M02S & John Crane 8B1
- Multi-spring construction for enhanced stability
- Supports various materials (Carbon / SIC / Ceramic / SS304)
- Reduced heat generation and extended seal life
- High resistance to pressure, wear, and corrosion
- Reliable performance in demanding environments
| Seal size (inches) | d | d 0 | d 3 | d 4 | d 6 | d 7 | l 1 | l 3 | l 4 |
| 0.625 | 12.7 | 15.87 | 30.8 | 34 | 14.5 | 25.60 | 27.0 | 7.90 | 7.5 |
| 0.750 | 15.9 | 19.05 | 34.0 | 37 | 17.5 | 31.95 | 30.0 | 10.30 | 7.8 |
| 0.875 | 19.1 | 22.22 | 37.2 | 40 | 21.0 | 35.12 | 32.0 | 10.30 | 8.0 |
| 1.000 | 22.2 | 25.40 | 40.3 | 43 | 24.0 | 38.30 | 33.0 | 10.30 | 8.0 |
| 1.125 | 25.4 | 28.58 | 43.4 | 46 | 27.5 | 41.48 | 35.0 | 11.15 | 7.9 |
| 1.250 | 28.6 | 31.75 | 48.3 | 51 | 30.5 | 44.65 | 35.0 | 11.15 | 7.9 |
| 1.375 | 28.6 | 34.93 | 51.3 | 54 | 30.5 | 44.65 | 37.0 | 11.15 | 8.7 |
| 1.500 | 31.8 | 38.10 | 54.5 | 58 | 33.5 | 47.83 | 37.0 | 11.15 | 8.7 |
| 1.625 | 34.9 | 41.28 | 60.8 | 64 | 37.5 | 51.00 | 45.0 | 11.15 | 8.7 |
| 1.750 | 38.1 | 44.45 | 64.0 | 67 | 40.0 | 54.18 | 45.0 | 11.15 | 9.5 |
| 1.875 | 41.3 | 47.62 | 67.2 | 70 | 43.5 | 60.53 | 45.0 | 12.75 | 9.5 |
| 2.000 | 44.5 | 50.80 | 70.4 | 73 | 46.5 | 63.70 | 45.0 | 12.75 | 9.5 |
| 2.125 | 47.6 | 53.98 | 76.7 | 80 | 49.5 | 66.88 | 52.0 | 12.75 | 11.1 |
| 2.250 | 50.8 | 57.15 | 79.9 | 83 | 53.0 | 70.05 | 52.0 | 12.75 | 11.1 |
| 2.375 | 54.0 | 60.33 | 83.1 | 86 | 56.0 | 76.40 | 52.0 | 14.33 | 11.1 |
| 2.500 | 57.2 | 63.50 | 86.2 | 89 | 59.0 | 79.58 | 52.0 | 14.33 | 11.1 |
| 2.625 | 60.3 | 66.68 | 89.4 | 92 | 62.5 | 82.75 | 52.0 | 14.33 | 11.1 |
| 2.750 | 63.5 | 69.85 | 92.6 | 96 | 65.5 | 85.93 | 52.0 | 14.33 | 11.1 |
| 2.875 | 66.7 | 73.03 | 95.8 | 99 | 68.5 | 85.93 | 52.0 | 15.93 | 11.1 |
| 3.000 | 69.9 | 76.20 | 97.3 | 100 | 72.0 | 89.10 | 52.0 | 15.93 | 11.1 |
| 3.125 | 73.0 | 79.38 | 100.5 | 104 | 75.0 | 95.45 | 52.0 | 15.93 | 11.1 |
| 3.250 | 76.2 | 82.55 | 105.3 | 108 | 78.5 | 98.63 | 52.0 | 15.93 | 14.3 |
| 3.375 | 79.4 | 85.73 | 108.5 | 111 | 81.5 | 101.80 | 52.0 | 19.84 | 14.3 |
| 3.500 | 82.6 | 88.90 | 111.6 | 115 | 84.5 | 104.98 | 52.0 | 19.84 | 14.3 |
| 3.625 | 85.7 | 92.08 | 114.8 | 118 | 88.0 | 108.15 | 52.0 | 19.84 | 14.3 |
| 3.750 | 88.9 | 95.25 | 118.0 | 121 | 91.0 | 111.33 | 52.0 | 19.84 | 14.3 |
| 3.875 | 92.1 | 98.43 | 121.2 | 124 | 94.0 | 114.50 | 52.0 | 19.84 | 14.3 |
| 4.000 | 95.3 | 101.60 | 124.3 | 127 | 97.5 | 117.68 | 52.0 | 19.84 | 14.3 |
| 4.125 | 98.4 | 104.78 | 127.0 | 134 | 100.5 | 120.85 | 52.4 | 19.84 | 14.3 |
| 4.250 | 101.6 | 107.95 | 133.4 | 137 | 103.5 | 124.03 | 52.4 | 19.84 | 14.3 |
| 4.375 | 104.8 | 111.13 | 136.5 | 140 | 107.0 | 130.38 | 52.4 | 19.84 | 14.3 |
| 4.500 | 107.9 | 114.30 | 139.7 | 143 | 110.0 | 133,55 | 52.4 | 19.84 | 14.3 |
| 4.625 | 111.1 | 117.48 | 142.9 | 146 | 110.0 | 133.55 | 52.4 | 19.84 | 15.8 |
| 4.750 | 114.3 | 120.65 | 146.1 | 149 | 113.5 | 136.72 | 52.4 | 19.84 | 15.8 |
| 4.875 | 117.4 | 123.83 | 149.2 | 153 | 116.5 | 139.90 | 52.4 | 19.84 | 15.8 |
| 5.000 | 120.6 | 127.00 | 152.4 | 156 | 119.5 | 143.08 | 52.4 | 19.84 | 15.8 |
| 5.125 | 123.8 | 130.18 | 155.6 | 159 | 122.5 | 146.25 | 52.4 | 19.84 | 15.8 |
| 5.250 | 127.0 | 133.35 | 165.1 | 168 | 126.0 | 149.43 | 60.3 | 19.84 | 15.8 |
| 5.375 | 130.2 | 136.53 | 168.28 | 171.45 | 129.0 | 152.60 | 60.3 | 19.84 | 15.8 |
| 5.500 | 133.3 | 139.70 | 171.5 | 175 | 132.0 | 155.77 | 60.3 | 19.84 | 15.8 |
| 5.625 | 136.5 | 142.88 | 174.6 | 178 | 135.5 | 158.95 | 60.3 | 19.84 | 15.8 |
| 5.750 | 139.7 | 146.05 | 177.8 | 181 | 138.5 | 162.12 | 60.3 | 19.84 | 15.8 |
| 5.875 | 142.9 | 149.23 | 181.0 | 184 | 141.5 | 165.30 | 60.3 | 19.84 | 15.8 |
| 6.000 | 146.0 | 152.40 | 184.2 | 188 | 145.0 | 168.47 | 60.3 | 19.84 | 15.8 |
- Industrial pump systems
- High-pressure applications
- Chemical and petrochemical industries
- Oil & gas processing
- Centrifugal pumps and rotating equipment
- Heavy-duty industrial operations