• Balanced Face Loading: Uniform pressure distribution across faces prevents uneven wear.
• Isolated Springs: Protected from sediment clogging often found in stagnant fire water lines.
Key Features
• Instant Start-Up Reliability: No seizing after long standby periods, crucial for emergency equipment.
• Compact Axial Length: Designed to fit the short stuffing boxes often found in split-case fire pumps.
• Corrosion Resistant: SS316 parts prevent rust seizing during standby.
Technical Specs | Materials | ||
Mediums | Chemical, Food, Oil, Petroleum, Pharmaceuticals Paper and pulp, Sewage treatment | Stationary Ring | Carbon/Sic/Ssic/TC |
Temperature | Elastomer Dependent | Rotary Ring | Sic/Ssic/TC |
Pressure | ≤2.8MPa | Secondary Seal | Viton/EPDM/Chemraz/Kalrez/Aflas, etc |
Speed | ≤25m/s | Spring and Metal Part | Stainless Steel/Hast C |
Product Specifications
| D1 (mm) | D2 | D3 | L1 | L2 | L3 |
| 30 | 67.0 | 73.0 | 32.5 | 54.5 | 20.0 |
| 41.3 | 85.0 | 91.0 | 32.5 | 60.5 | 23.0 |
| 48 | 90.0 | 96.0 | 34.5 | 63.5 | 26.0 |
| 55 | 100.0 | 106.0 | 34.5 | 63.5 | 26.0 |
| 70 | 119.0 | 125.0 | 40.5 | 63.5 | 26.0 |
| 76.2 | 130.0 | 136.0 | 47.5 | 66.5 | 27.0 |
| 86 | 138.5 | 144.5 | 45.5 | 66.5 | 27.0 |
| 92 | 148.0 | 154.0 | 45.5 | 66.5 | 27.0 |
| 112 | 172.0 | 178.0 | 59.0 | 75.0 | 28.5 |
| 124 | 187.0 | 193.0 | 59.0 | 75.0 | 28.5 |
| 140 | 205.0 | 211.0 | 59.0 | 75.0 | 28.5 |
| 158 | 225.0 | 231.0 | 60.5 | 78.5 | 32.0 |
| 165.1 | 240.0 | 246.0 | 60.0 | 79.0 | 32.5 |
| 194 | 266.0 | 272.0 | 60.0 | 79.0 | 32.5 |
| 200 | 275.0 | 281.0 | 67.4 | 82.0 | 35.5 |
| 220 | 288.0 | 294.0 | 69.3 | 82.0 | 35.5 |
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
Fire Station Test: A municipal fire station pump seized during a routine test. Switched to our Multi-Spring Cartridge; passed the next annual test with an instant start.
Testimonials
For fire safety equipment, we don't take risks. Miaoyu's multi-spring seals are built to spec and have never failed a start-up test.
—Fire Safety Contractor, Dubai
FAQs about Metal Bellows Seals for High Temperature Pumps
Q: Is this seal UL/FM Listed?
A: While mechanical seals are components and not typically listed individually, our design is fully compliant with NFPA 20 standards and is suitable for use in UL/FM listed fire pumps. We use corrosion-resistant materials to ensure readiness even after months of inactivity.
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
