• Exact Dimensional Match: Replicates the working length and mounting dimensions of the Roten original, ensuring a drop-in fit without pump modification.
• Enhanced Bellow Strength: We use a high-density welding process that increases the fatigue strength of the bellow leaflets compared to standard commercial versions.
Key Features
• Direct Roten Replacement: Specifically engineered to replace Roten Type 37, Type E, or similar metal bellow models used in European boiler feed pumps.
• High-Grade Materials: Upgraded from standard materials to premium Inconel bellows and Tungsten Carbide faces for extended service life.
• Economical Repair Solution: Provides OEM-level performance at a fraction of the cost for routine boiler maintenance.
Technical Specs | Materials | ||
Mediums | Oil, light hydrocarbon, aromatic hydrocarbon, organicsolvents, weak acids, alkali, Ammonia, etc. | Stationary Ring | Sic/TC |
Temperature | 20℃ to 200℃ | Rotary Ring | Carbon/Sic/TC |
Pressure | ≤2.0MPa | Secondary Seal | NBR/EPDM/Viton |
Speed | ≤23m/s | Spring and Metal Part | Stainless Stee |
Product Specifications
| Size/Metric D1 | Size Code | D3 | L1 |
| 18 | 0180 | 32.0 | 27.5 |
| 20 | 0200 | 33.3 | 27.5 |
| 22 | 0220 | 36.0 | 27.5 |
| 24 | 0240 | 38.1 | 30.0 |
| 25 | 0250 | 39.0 | 30.0 |
| 28 | 0280 | 42.0 | 32.5 |
| 30 | 0300 | 44.0 | 32.5 |
| 32 | 0320 | 46.0 | 32.5 |
| 33 | 0330 | 47.0 | 32.5 |
| 35 | 0350 | 49.2 | 32.5 |
| 38 | 0380 | 52.4 | 34.0 |
| 40 | 0400 | 55.6 | 34.0 |
| 43 | 0430 | 58.7 | 34.0 |
| 45 | 0450 | 58.7 | 34.0 |
| 48 | 0480 | 61.9 | 34.0 |
| 50 | 0500 | 65.1 | 34.5 |
| 53 | 0530 | 68.3 | 34.5 |
| 55 | 0550 | 71.0 | 34.5 |
| 60 | 0600 | 74.6 | 39.5 |
| 65 | 0650 | 84.1 | 39.5 |
| 70 | 0700 | 87.3 | 45.0 |
| 75 | 0750 | 95.3 | 45.0 |
| 80 | 0800 | 98.4 | 44.5 |
| 85 | 0850 | 104.8 | 44.5 |
| 90 | 0900 | 108.0 | 49.5 |
| 95 | 0950 | 114.3 | 49.5 |
| 100 | 1000 | 120.7 | 49.5 |
| 105 | 1050 | 131.7 | 48.3 |
| 110 | 1100 | 138.1 | 48.3 |
| 115 | 1150 | 144.5 | 48.3 |
| 120 | 1200 | 144.5 | 48.3 |
| 125 | 1250 | 150.8 | 48.3 |
| 130 | 1300 | 157.8 | 48.3 |
| 140 | 1400 | 170.5 | 48.3 |
| 150 | 1500 | 176.9 | 48.3 |
| 0.750 | 0191 | 33.32 | 31.75 |
| 0.875 | 0222 | 36.50 | 31.75 |
| 0.937 | 0238 | 38.10 | 31.75 |
| 1.000 | 0254 | 39.67 | 31.75 |
| 1.125 | 0286 | 42.85 | 31.75 |
| 1.250 | 0317 | 46.02 | 33.32 |
| 1.375 | 0349 | 49.20 | 36.50 |
| 1.500 | 0381 | 52.37 | 36.50 |
| 1.625 | 0412 | 55.55 | 36.50 |
| 1.750 | 0444 | 58.72 | 36.50 |
| 1.875 | 0476 | 61.90 | 38.10 |
| 2.000 | 0508 | 65.07 | 38.10 |
| 2.125 | 0539 | 68.25 | 38.10 |
| 2.250 | 0571 | 71.42 | 39.67 |
| 2.375 | 0603 | 74.60 | 39.67 |
| 2.500 | 0635 | 80.95 | 39.67 |
| 2.625 | 0666 | 84.12 | 41.28 |
| 2.750 | 0698 | 87.30 | 41.28 |
| 2.875 | 0730 | 92.08 | 42.85 |
| 3.000 | 0762 | 95.25 | 42.85 |
| 3.125 | 0794 | 98.43 | 44.45 |
| 3.250 | 0826 | 101.60 | 44.45 |
| 3.375 | 0857 | 104.78 | 44.45 |
| 3.500 | 0889 | 107.95 | 47.63 |
| 3.625 | 0921 | 111.13 | 47.63 |
| 3.750 | 0953 | 114.30 | 47.63 |
| 3.875 | 0984 | 117.48 | 47.63 |
| 4.000 | 1016 | 120.65 | 47.63 |
| 4.250 | 1080 | 131.75 | 48.34 |
| 4.500 | 1143 | 138.13 | 48.34 |
| 4.750 | 1207 | 144.48 | 48.34 |
| 5.000 | 1270 | 150.70 | 48.34 |
| 5.250 | 1334 | 157.81 | 48.34 |
| 5.500 | 1397 | 164.16 | 48.34 |
| 5.750 | 1461 | 170.54 | 48.34 |
| 6.000 | 1524 | 176.89 | 48.34 |
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
Industrial Laundry: A large laundry facility used Roten seals on their steam boiler feed pumps. Frequent failures occurred. We supplied our compatible Metal Bellows Seal with upgraded TC faces. The new seals resist the abrasive particles in the condensate return, doubling seal life.
Testimonials
Fits our Grundfos and Lowara pumps that used Roten seals perfectly. Great quality and stock availability.
—Spare Parts Manager, HVAC Service Co.
FAQs about Metal Bellows Seals for High Temperature Pumps
Q: How do I identify if I have a Roten seal?
A: Roten seals often have distinctive markings or a specific "Type 37" look with a short metal bellow. Send us a photo, and our engineers can identify it instantly.
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
