The Roten Type 3 & Type 5 mechanical seal replacement is a precision-engineered sealing solution designed for industrial pumps handling water, chemicals, and light slurries. Manufactured by MIAOYU, these seals are fully interchangeable with original Roten Type 3 (general-purpose) and Type 5 (heavy-duty) models, ensuring reliable performance in chemical processing, water treatment, and HVAC systems. Available in material combinations like silicon carbide, tungsten carbide, and ceramic, they provide a cost-effective alternative for maintenance and OEM applications.
Key Features
• Full OEM Interchangeability: Designed to match Roten’s exact dimensions (EN 12756standard), these seals drop directly into existing pump housings without modifications, minimizing downtime during replacement.
• Dual-Profile Versatility: Covers both standard-duty (Type 3) and heavy-duty (Type 5) requirements in one product line, simplifying inventory management for facilities with mixed pump fleets.
• Abrasion & Corrosion Resistance: Utilizes premium materials like solid silicon carbide (SiC) and tungsten carbide (TC) for sealing faces, offering superior durability against gritty fluids and aggressive chemicals compared to standard carbon/ceramic seals.
• Vibration & Misalignment Tolerance: The conical spring and resilient design (especially in Type 5 style) compensate for shaft runout and vibration, ensuring stable sealing in demanding industrial environments.
• Cost-Efficient Maintenance: Type 5 variants support “face-only” replacement strategies, allowing you to reuse metal components and significantly reduce long-term spare parts costs.
Product Specifications
| Size Metric | d | D3 | D2 | D1 | d1 | L1 | L11 | L2 | L3 |
| 10 | 10 | 20 | 17 | 21 | 3 | 16.9 | 10 | 17.5 | |
| 12 | 12 | 22 | 19 | 23 | 3 | 17.4 | 10 | 17.5 | |
| 14 | 14 | 24 | 21 | 25 | 3 | 17.4 | 16.5 | 10 | 17.5 |
| 16 | 16 | 26 | 23 | 27 | 3 | 19.5 | 16.5 | 10 | 17.5 |
| 18 | 18 | 31 | 27 | 33 | 3 | 20.5 | 18 | 11.5 | 19.5 |
| 20 | 20 | 34 | 29 | 35 | 3 | 22 | 19 | 11.5 | 19.5 |
| 22 | 22 | 36 | 31 | 37 | 3 | 23.5 | 20.5 | 11.5 | 19.5 |
| 24 | 24 | 38 | 33 | 39 | 3 | 25 | 22 | 11.5 | 19.5 |
| 25 | 25 | 39 | 34 | 40 | 3 | 26.5 | 23.5 | 11.5 | 19.5 |
| 28 | 28 | 42 | 37 | 43 | 3 | 26.5 | 24.5 | 11.5 | 19.5 |
| 30 | 30 | 44 | 39 | 45 | 3 | 25 | 24.5 | 11.5 | 19.5 |
| 32 | 32 | 46 | 42 | 48 | 3 | 28.5 | 28 | 11.5 | 19.5 |
| 33 | 33 | 47 | 42 | 48 | 3 | 11.5 | 19.5 | ||
| 35 | 35 | 49 | 44 | 50 | 3 | 28.5 | 28 | 11.5 | 19.5 |
| 38 | 38 | 54 | 49 | 56 | 4 | 32.2 | 31 | 14 | 22 |
| 40 | 40 | 56 | 51 | 58 | 4 | 34.7 | 34 | 14 | 22 |
| 43 | 43 | 59 | 54 | 61 | 4 | 14 | 22 | ||
| 45 | 45 | 61 | 56 | 63 | 4 | 39.2 | 36.5 | 14 | 22 |
| 48 | 48 | 64 | 59 | 66 | 4 | 44.7 | 42 | 14 | 22 |
| 50 | 50 | 66 | 62 | 70 | 4 | 45.7 | 43 | 15 | 23 |
| 53 | 53 | 69 | 65 | 73 | 4 | 15 | 23 | ||
| 55 | 55 | 71 | 67 | 75 | 4 | 49 | 47 | 15 | 23 |
| 58 | 58 | 78 | 70 | 78 | 4 | 52 | 50 | 15 | 23 |
| 60 | 60 | 79 | 72 | 80 | 4 | 53 | 51 | 15 | 23 |
| 63 | 63 | 83 | 75 | 83 | 4 | 15 | 23 | ||
| 65 | 65 | 85 | 77 | 85 | 4 | 54.3 | 52 | 15 | 23 |
| 68 | 68 | 88 | 81 | 90 | 4 | 55.3 | 52.7 | 18 | 26 |
| 70 | 70 | 90 | 83 | 92 | 4 | 56.3 | 54 | 18 | 26 |
| 75 | 75 | 98 | 88 | 97 | 4 | 56.3 | 54 | 18 | 26 |
| 80 | 80 | 103 | 95 | 105 | 4 | 59.3 | 58 | 18.2 | 26.2 |
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
Residential Supply: A distributor of domestic booster pumps needed a reliable seal replacement. We supplied this Roten-style Carbon seal. Its tolerance for start/stop cycles reduced their warranty claims by 50%.
Testimonials
Fits perfectly in the Tullu Top pump. The carbon face doesn't crack like the cheap ceramic ones we used to buy.
—Pump Repair Shop, India
FAQs about Roten Type 3 Type 5 Mechanical Seal Replacement
Q: Is this a Type 2 or Type 5 mechanical seal?
A: For Tullu pumps, it is typically a specific variant of the Roten Type 2 or Type 5, scaled down. We have the specific mold dimensions to fit the Tullu seal cavity exactly.
Q: What is the main difference between Roten Type 3 and Type 5 mechanical seals?
A: Type 3 is a standard-duty, unbalanced seal ideal for clean water and non-abrasive liquids. Type 5 is a heavy-duty version featuring a conical spring design that offers better tolerance to shaft misalignment and vibration, making it suitable for harsh conditions like chemicals and light slurries. Type 5 also allows for "face-only" replacement during maintenance, reducing long-term costs.
Q: Are these replacement seals fully interchangeable with OEM Roten parts?
A: Yes. MIAOYU's Roten Type 3 and Type 5 replacements are manufactured to comply with EN 12756 / ISO 3069 dimensional standards. They are designed to match the original shaft diameter (d), housing diameter (D), and working length (L1) specifications, ensuring a direct drop-in fit without pump modification.
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
