• Anti-Extrusion Tech: Equipped with precision backup rings to prevent O-ring extrusion under extreme pressure spikes.
• Heavy Duty Drive: Utilizes substantial drive keys to transmit the high torque required to rotate the faces in high-viscosity or high-pressure fluids.
Key Features
• High-Pressure Pusher: A robust O-ring pusher seal designed for high-pressure pipeline and injection applications.
• Balanced Integrity: The 8B1 is a balanced seal designed to handle pressures up to 83 bar (1200 PSI) without face separation.
• Safe Design: The 8B2 features a specialized geometry for even higher reliability in critical hydrocarbon services.
Technical Specs | Materials | ||
Mediums | Petroleum, chemical solvents, medium corrosion. | Stationary Ring | Ceramic/Sic/TC |
Temperature | 30℃ to 200℃ | Rotary Ring | Carbon/Sic/TC |
Pressure | ≤2.5MPa | Secondary Seal | NBR/EPDM/Viton |
Speed | ≤25m/s | Spring and Metal Part | Stainless Steel |
Product Specifications
| Inch Shaft Size | Size Code | D1 | D2 | D3 | L1 | L3 | D7 | L4 |
| 0.625 | 0158 | 15.87 | 12.7 | 30.80 | 27.0 | 7.5 | 25.60 | 7.90 |
| 0.750 | 0191 | 19.05 | 15.9 | 34.00 | 30.0 | 7.8 | 31.95 | 10.30 |
| 0.875 | 0222 | 22.22 | 19.1 | 37.20 | 32.0 | 8.0 | 35.12 | 10.30 |
| 1.000 | 0254 | 25.40 | 22.2 | 40.30 | 33.0 | 8.0 | 38.30 | 10.30 |
| 1.125 | 0286 | 28.58 | 25.4 | 43.40 | 35.0 | 7.9 | 41.48 | 11.15 |
| 1.250 | 0317 | 31.75 | 28.6 | 48.30 | 35.0 | 7.9 | 44.65 | 11.15 |
| 1.375 | 0349 | 34.93 | 28.6 | 51.30 | 37.0 | 8.7 | 44.65 | 11.15 |
| 1.500 | 0381 | 38.10 | 31.8 | 54.50 | 37.0 | 8.7 | 47.83 | 11.15 |
| 1.625 | 0412 | 41.28 | 34.9 | 60.80 | 45.0 | 8.7 | 51.00 | 11.15 |
| 1.750 | 0444 | 44.45 | 38.1 | 64.00 | 45.0 | 9.5 | 54.18 | 11.15 |
| 1.875 | 0476 | 47.62 | 41.3 | 67.20 | 45.0 | 9.5 | 60.53 | 12.75 |
| 2.000 | 0508 | 50.80 | 44.5 | 70.40 | 45.0 | 9.5 | 63.70 | 12.75 |
| 2.125 | 0539 | 53.98 | 47.6 | 76.70 | 52.0 | 11.1 | 66.88 | 12.75 |
| 2.250 | 0571 | 57.15 | 50.8 | 79.90 | 52.0 | 11.1 | 70.05 | 12.75 |
| 2.375 | 0603 | 60.33 | 54.0 | 83.10 | 52.0 | 11.1 | 76.40 | 14.33 |
| 2.500 | 0635 | 63.50 | 57.2 | 86.20 | 52.0 | 11.1 | 79.58 | 14.33 |
| 2.625 | 0666 | 66.68 | 60.3 | 89.40 | 52.0 | 11.1 | 82.75 | 14.33 |
| 2.750 | 0698 | 69.85 | 63.5 | 92.60 | 52.0 | 11.1 | 85.93 | 14.33 |
| 2.875 | 0730 | 73.03 | 66.7 | 95.80 | 52.0 | 11.1 | 85.96 | 15.93 |
| 3.000 | 0762 | 76.20 | 69.9 | 97.30 | 52.0 | 11.1 | 89.10 | 15.93 |
| 3.125 | 0793 | 79.38 | 73.0 | 100.50 | 52.0 | 11.1 | 95.45 | 15.93 |
| 3.250 | 0825 | 82.55 | 76.2 | 105.30 | 52.0 | 14.3 | 98.63 | 19.84 |
| 3.375 | 0857 | 85.73 | 79.4 | 108.50 | 52.0 | 14.3 | 101.80 | 19.84 |
| 3.500 | 0889 | 88.90 | 82.6 | 111.60 | 52.0 | 14.3 | 104.98 | 19.84 |
| 3.625 | 0921 | 92.08 | 85.7 | 114.80 | 52.0 | 14.3 | 108.15 | 19.84 |
| 3.750 | 0953 | 95.25 | 88.9 | 118.00 | 52.0 | 14.3 | 111.33 | 19.84 |
| 3.875 | 0984 | 98.43 | 92.1 | 121.20 | 52.0 | 14.3 | 114.50 | 19.84 |
| 4.000 | 1016 | 101.60 | 95.3 | 124.30 | 52.0 | 14.3 | 117.68 | 19.84 |
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
Crude Oil Pipeline: Mainline pumps operating at 60 bar were chewing through standard seals. We installed 8B1 replacements with Tungsten Carbide faces. The robust design handled the pressure fluctuations and abrasive crude oil effortlessly.
Testimonials
These 8B1 replacements are built like tanks. Perfect for our high-pressure injection pumps.
—Lead Tech, Pipeline Station
FAQs about Metal Bellows Seals for High Temperature Pumps
Q: Is this API 682 compliant?
A: The 8B1 design principles form the basis of API 682 Type A seals. Our replacement meets the rigorous dimensional and performance standards required for refinery service.
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
