• Heavy-Duty Drive: The seal utilizes a heavy-duty compression ring and drive pins to handle high torque loads and viscosity changes.
• Multi-Spring Even Loading: Multiple coil springs provide uniform face loading, ensuring the PTFE wedge seats correctly even under thermal cycling.
Key Features
• RO / RA Legacy Replacement: A direct aftermarket replacement for the classic Durametallic (Flowserve) RO and RA series pusher seals.
• PTFE Wedge Sealing: Features a chemically inert PTFE wedge secondary seal, making it ideal for aggressive chemicals, solvents, and oxidizing agents where O-rings fail.
• Rotating Seat Design: The robust rotating seat design allows for solids to be centrifuged away from the seal faces, making it suitable for fluids with some suspended solids.
Technical Specs | Materials | ||
Mediums | Water, oil and weakly-corrosive mediums | Stationary Ring | Ceramic/Sic/TC |
Pressure | ≤1.2MPa | Rotary Ring | Carbon/Sic/TC |
Temperature | -20℃ to 120℃ | Secondary Seal | NBR/EPDM/Viton |
Speed | ≤12m/s | Spring and Metal Part | Stainless Steel |
Product Specifications
| D1 (mm) | Size Code | D3 | D7 | L4 | L1 | L11 | L12 |
| 10 | 0100 | 22.50 | 21.00 | 6.60 | 14.50 | 25.90 | 33.40 |
| 12 | 0120 | 25.00 | 23.00 | 6.60 | 15.00 | 25.90 | 33.40 |
| 14 | 0140 | 28.50 | 25.00 | 6.60 | 17.00 | 28.40 | 33.40 |
| 15 | 0150 | 28.50 | 27.00 | 6.60 | 17.00 | 28.40 | 33.40 |
| 16 | 0160 | 28.50 | 27.00 | 6.60 | 17.00 | 28.40 | 33.40 |
| 18 | 0180 | 32.00 | 33.00 | 7.50 | 19.50 | 30.00 | 37.50 |
| 20 | 0200 | 37.00 | 35.00 | 7.50 | 21.50 | 30.00 | 37.50 |
| 22 | 0220 | 37.00 | 37.00 | 7.50 | 21.50 | 30.00 | 37.50 |
| 24 | 0240 | 42.50 | 39.00 | 7.50 | 22.50 | 32.50 | 42.50 |
| 25 | 0250 | 42.50 | 40.00 | 7.50 | 23.00 | 32.50 | 42.50 |
| 28 | 0280 | 49.00 | 43.00 | 7.50 | 26.50 | 35.00 | 42.50 |
| 30 | 0300 | 49.00 | 45.00 | 7.50 | 26.50 | 35.00 | 42.50 |
| 32 | 0320 | 53.50 | 48.00 | 7.50 | 27.50 | 35.00 | 47.50 |
| 33 | 0330 | 53.50 | 48.00 | 7.50 | 27.50 | 35.00 | 47.50 |
| 35 | 0350 | 57.00 | 50.00 | 7.50 | 28.50 | 35.00 | 47.50 |
| 38 | 0380 | 59.00 | 56.00 | 9.00 | 30.00 | 36.00 | 46.00 |
| 40 | 0400 | 62.00 | 58.00 | 9.00 | 30.00 | 36.00 | 46.00 |
| 43 | 0430 | 65.50 | 61.00 | 9.00 | 30.00 | 36.00 | 51.00 |
| 45 | 0450 | 68.00 | 63.00 | 9.00 | 30.00 | 36.00 | 51.00 |
| 48 | 0480 | 70.50 | 66.00 | 9.00 | 30.50 | 36.00 | 51.00 |
| 50 | 0500 | 74.00 | 70.00 | 9.50 | 30.50 | 38.00 | 50.50 |
| 53 | 0530 | 78.50 | 73.00 | 11.00 | 33.00 | 36.50 | 59.00 |
| 55 | 0550 | 81.00 | 75.00 | 11.00 | 35.00 | 36.50 | 59.00 |
| 58 | 0580 | 85.50 | 78.00 | 11.00 | 37.00 | 41.50 | 59.00 |
| 60 | 0600 | 88.80 | 80.00 | 11.00 | 38.00 | 41.50 | 59.00 |
| 65 | 0650 | 93.50 | 85.00 | 11.00 | 40.00 | 41.50 | 69.00 |
| 68 | 0680 | 96.50 | 90.00 | 11.30 | 40.00 | 41.20 | 68.70 |
| 70 | 0700 | 99.50 | 92.00 | 11.30 | 40.00 | 48.70 | 68.70 |
| 75 | 0750 | 107.00 | 97.00 | 11.30 | 40.00 | 48.00 | 68.70 |
| 80 | 0800 | 112.00 | 105.00 | 12.00 | 40.00 | 48.00 | 78.00 |
| 85 | 0850 | 120.00 | 110.00 | 14.00 | 41.00 | 46.00 | 76.00 |
| 90 | 0900 | 127.00 | 115.00 | 14.00 | 45.00 | 51.00 | 76.00 |
| 95 | 0950 | 132.00 | 120.00 | 14.00 | 46.00 | 51.00 | 76.00 |
| 100 | 1000 | 137.00 | 125.00 | 14.00 | 47.00 | 51.00 | 76.00 |
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 Solvent Transfer: A paint plant using old Durametallic RO seals experienced leaks due to O-ring swelling from Ketones. We supplied this PTFE Wedge RO replacement. The inert wedge withstood the chemical attack, extending seal life by 300%.
Testimonials
Hard to find parts for these older RO seals. Your replacement fit perfectly and the PTFE wedge quality is top-notch.
—Maintenance Planner, Chemical Plant
FAQs about Metal Bellows Seals for High Temperature Pumps
Q: What does "RO" stand for?
A: Originally from Durametallic, "RO" typically stands for "Rotating Outside" or a specific rotating seat arrangement. It is a classic heavy-duty pusher seal design.
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
