• Multi-Spring Design: Uses multiple small springs located outside the fluid path (in some configurations) or protected to provide uniform face loading without clogging.
• Shaft Protection: The seal design does not fret the shaft, as the dynamic secondary seal moves against a hardened sleeve or the seal's own components depending on the specific sub-model.
Key Features
• DIN Standard Compliance: Fully compliant with DIN 24960 (EN 12756) standards, ensuring a perfect fit for European chemical and industrial pumps.
• Versatile Configuration: Available in Unbalanced (58U/59U) for lower pressures and Balanced (58B/59B) for higher pressure applications.
• PTFE Wedge or O-Ring: Designed with a versatile secondary seal area that can accommodate PTFE wedges (Type 59) for chemical resistance or O-rings (Type 58) for general duties.
Technical Specs | Materials | ||
Mediums | Petroleum, chemical solvents, medium corrosion. | Stationary Ring | Ceramic/Sic/TC |
Temperature | -20℃ to 200℃ | Rotary Ring | Carbon/Sic/TC |
Pressure | ≤1.7MPa | Secondary Seal | PTFE |
Speed | ≤25m/s | Spring and Metal Part | Stainless Steel |
Product Specifications
| Metric Shaft Size D1 | Size Code | D3 | D7 | L1 | L4 |
| 16 | 0160 | 26.0 | 27.0 | 23.0 | 12.0 |
| 18 | 0180 | 32.0 | 33.0 | 24.0 | 13.5 |
| 20 | 0200 | 34.0 | 35.0 | 24.0 | 13.5 |
| 22 | 0220 | 36.0 | 37.0 | 24.0 | 13.5 |
| 24 | 0240 | 38.0 | 39.0 | 26.7 | 13.3 |
| 25 | 0250 | 39.0 | 40.0 | 27.0 | 13.0 |
| 28 | 0280 | 42.0 | 43.0 | 30.0 | 12.5 |
| 30 | 0300 | 44.0 | 45.0 | 30.5 | 12.0 |
| 32 | 0320 | 46.0 | 48.0 | 30.5 | 12.0 |
| 33 | 0330 | 47.0 | 48.0 | 30.5 | 12.0 |
| 35 | 0350 | 49.0 | 50.0 | 30.5 | 12.0 |
| 38 | 0380 | 54.0 | 56.0 | 32.0 | 13.0 |
| 40 | 0400 | 56.0 | 58.0 | 32.0 | 13.0 |
| 43 | 0430 | 59.0 | 61.0 | 32.0 | 13.0 |
| 45 | 0450 | 61.0 | 63.0 | 32.0 | 13.0 |
| 48 | 0480 | 64.0 | 66.0 | 32.0 | 13.0 |
| 50 | 0500 | 66.0 | 70.0 | 34.0 | 13.5 |
| 53 | 0530 | 69.0 | 73.0 | 34.0 | 13.5 |
| 55 | 0550 | 71.0 | 75.0 | 34.0 | 13.5 |
| 58 | 0580 | 78.0 | 78.0 | 39.0 | 13.5 |
| 60 | 0600 | 80.0 | 80.0 | 39.0 | 13.5 |
| 63 | 0630 | 83.0 | 83.0 | 39.0 | 13.5 |
| 65 | 0650 | 85.0 | 85.0 | 39.0 | 13.5 |
| 68 | 0680 | 88.0 | 90.0 | 39.0 | 13.5 |
| 70 | 0700 | 90.0 | 92.0 | 45.5 | 14.5 |
| 75 | 0750 | 95.0 | 97.0 | 45.5 | 14.5 |
| 80 | 0800 | 104.0 | 105.0 | 45.0 | 15.0 |
| 85 | 0850 | 109.0 | 110.0 | 45.0 | 15.0 |
| 90 | 0900 | 114.0 | 115.0 | 50.0 | 15.0 |
| 95 | 0950 | 119.0 | 120.0 | 50.0 | 15.0 |
| 100 | 1000 | 124.0 | 125.0 | 50.0 | 15.0 |
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
Chemical Process Pump: Replaced OEM seals on a KSB pump handling hot oil. We used the 59B (Balanced, PTFE Wedge) equivalent. The balanced design handled the vapor pressure, and the PTFE wedge survived the heat, extending MTBF by 12 months.
Testimonials
The 59B replacement is our standard for hot oil pumps. It fits perfectly and costs half of the OEM price.
—Maintenance Manager, Refinery
FAQs about Metal Bellows Seals for High Temperature Pumps
Q: What is the difference between B and U?
A: "U" stands for Unbalanced, suitable for lower pressures. "B" stands for Balanced, which has a stepped face geometry to handle higher pressures and reduce heat generation.
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
