The Roten Type 2 O ring mechanical seal is a globally recognized industrial sealing solution, originally patented in Italy. This versatile seal features a robust conical spring and O-ring pusher design, engineered for a wide range of applications including water, chemicals, hydrocarbons, and food processing. Roten mechanical seal is available in shaft diameters from 8mm to 100mm and operates effectively in temperatures from -35°C to 180°C, with pressure ratings up to 16 bar. Known for its reliability and ease of installation, it serves as a direct replacement for numerous pump brands and is compliant with EN 12756 and ISO 3069 standards.
Key Features
• Standard Roten Replacement: A direct, cost-effective replacement for Roten Type 2, Type 2a, and Type 5 seals found in widely used centrifugal water pumps (e.g., Calpeda, Ebara).
• High-Purity Alumina: Uses 99.5% Alumina Ceramic stationary seats, which offer superior hardness and thermal shock resistance compared to standard 95% commercial ceramics.
• Compact Axial Profile: Type 2 mechanical seals are engineered to fit the extremely short stuffing boxes typical of mass-produced European water pumps.
• Precision Lapping: The ceramic face is lapped to within 2 light bands of flatness, ensuring a tight seal with the carbon rotary face immediately upon startup.
• Bonded or Booted: Roten mechanical seals are available in both bonded cup and O-ring mounted seat configurations to match the specific Roten housing style (L1k or L4 dimensions).
Product Specifications
| Size Metric | D1 | D2 | D3 | L1 | L2 | L3 |
| 10 | 19.2 | 15.5 | 19 | 15.5 | 6.6 | 5 |
| 12 | 21.6 | 17.5 | 21 | 15.5 | 5.6 | 5 |
| 14 | 24.6 | 20.5 | 23 | 15.5 | 5.6 | 5 |
| 15 | 24.6 | 20.5 | 24 | 15.5 | 6.6 | 5 |
| 16 | 28 | 22 | 26 | 17.5 | 7.5 | 6.5 |
| 18 | 30 | 24 | 29 | 18.5 | 8 | 6.5 |
| 19 | 31 | 25 | 31 | 20 | 7.5 | 6.5 |
| 20 | 35 | 29.5 | 31 | 20 | 7.5 | 6.5 |
| 22 | 35 | 29.5 | 33 | 21.5 | 7.5 | 6.5 |
| 24 | 38 | 32 | 35 | 23 | 7.5 | 6.5 |
| 25 | 38 | 32 | 36 | 24.5 | 7.5 | 6.5 |
| 26 | 40 | 34 | 37 | 24.5 | 8 | 6.5 |
| 28 | 42 | 36 | 40 | 24.5 | 9 | 6.5 |
| 30 | 45 | 39.2 | 43 | 24.5 | 10.5 | 6.5 |
| 32 | 48 | 42.2 | 46 | 28 | 10.5 | 6.5 |
| 35 | 52 | 46.2 | 49 | 28 | 11 | 6.5 |
| 38 | 55 | 49.2 | 53 | 31 | 10.3 | 6.5 |
| 40 | 58 | 52.2 | 56 | 34 | 10.8 | 6.5 |
| 42 | 62 | 53.3 | 59 | 35 | 12 | 8 |
| 43 | 62 | 54.3 | 59 | 35 | 12 | 8 |
| 45 | 64 | 55.3 | 61 | 36.5 | 11.6 | 8 |
| 48 | 68 | 59.7 | 64 | 42 | 11.6 | 8 |
| 50 | 69 | 60.8 | 66 | 43 | 11.6 | 8.5 |
| 55 | 75.4 | 66.5 | 71 | 47 | 13.3 | 8.5 |
| 58 | 78.4 | 69.5 | 76 | 50 | 13.3 | 8.5 |
| 60 | 80.4 | 71.5 | 78 | 51 | 13.3 | 8.5 |
| 65 | 85.4 | 76.5 | 84 | 52 | 13 | 8.5 |
| 68 | 91.5 | 82.7 | 88 | 53 | 13.7 | 9.5 |
| 70 | 92 | 83 | 90 | 54 | 13 | 9.5 |
| 75 | 99 | 92.2 | 98 | 55 | 14 | 9.5 |
| 80 | 104 | 95.2 | 100 | 58 | 15 | 10 |
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 type 2 mechanical 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
Domestic Booster System: A residential building water booster system was leaking. We supplied Alumina/Carbon replacements for the Roten Type 2 seals. The high-purity ceramic resisted the micro-abrasives in the city water, stopping the leaks instantly.
Testimonials
The ceramic quality on these Roten replacements is excellent. They don't pit like the cheaper ones we used to buy.
—Pump Repair Technician, Spain
FAQs about Roten Type 2 O ring Mechanical Seal
Q: Is Alumina Ceramic better than Steatite?
A: Yes, significantly. 99.5% Alumina is harder, more chemically resistant, and dissipates heat better than lower-grade Steatite ceramics, reducing the risk of heat cracking during dry starts.
Q: What pumps is the Roten Type 2 seal compatible with?
A: It is a universal seal widely used in centrifugal and rotary pumps from brands like Pedrollo, Lowara, Calpeda, SIHI, Inox, and Grundfos. It is designed to fit standard seal chambers conforming to the Type 2 dimensional standard.
Q: Is this a cartridge seal or component parts?
A: The Roten Type 2 mechanical seal is typically supplied as a component seal (spring, face, O-rings), which is the traditional design for this model. However, cartridge-style versions are also available for specific applications to facilitate easier installation.
Q: How do I select the correct size?
A: You need to measure the shaft diameter (e.g., 12mm, 16mm, 25mm) and the housing bore. Refer to standard size charts (like N41 series) or provide your pump model for a precise match. Sizes are commonly available from 8mm to 100mm.
Our company is specialized in the production of sealing materials, mechanical seals , cartridge seals.
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