• Torque Transmission Design: Utilizes a robust drive system within the cartridge to handle the high torque of vertical start-ups, preventing slippage.
• Optimized Elastomers: We use premium EPDM (for water) or FKM (for industrial fluids) that resists compression set, ensuring the seal stays tight over years of service.
Key Features
• Direct Drop-In Fit: Designed to match the exact dimensions of Grundfos shaft sizes (12mm, 16mm, 22mm), ensuring a leak-free fit with no modification.
• Shaft Protection: The cartridge sleeve design ensures the dynamic O-rings do not fret or wear the pump shaft, extending the equipment's total lifespan.
• Balanced Seal Face: Handles the high pressure typical of multistage pumps while maintaining low friction and minimal heat generation.
Technical Specs | Materials | ||
Mediums | Chemical, Food, Oil, Petroleum, Pharmaceuticals Paper and pulp, Sewage treatment | Stationary Ring | Carbon/Sic/Ssic/TC |
Temperature | Elastomer Dependent | Rotary Ring | Sic/Ssic/TC |
Pressure | ≤2.8MPa | Secondary Seal | Viton/EPDM/Chemraz/Kalrez/Aflas, etc. |
Speed | ≤35m/s | Spring and Metal Part | Stainless Steel/Hast C |
Product Specifications
| D1 (mm) | D2 | D3 | D5 | L1 | L2 | L3 | L5 |
| 43.5 | 104 | 12.5 | 19 | 38 | 25 | 62 | |
| 25 | 43.5 | 104 | 12.5 | 19 | 38 | 25 | 62 |
| 28 | 46.5 | 104 | 12.5 | 19 | 38 | 25 | 62 |
| 30 | 48.5 | 104 | 12.5 | 19 | 38 | 25 | 67 |
| 32 | 50.5 | 104 | 12.5 | 19 | 38 | 25 | 67 |
| 33 | 50.5 | 104 | 12.5 | 19 | 38 | 25 | 67 |
| 35 | 53.5 | 110 | 12.5 | 19 | 38 | 25 | 70 |
| 38 | 56.5 | 125 | 14.7 | 19 | 38 | 25 | 75 |
| 40 | 58.5 | 125 | 14.7 | 19 | 38 | 25 | 75 |
| 42 | 60.5 | 133 | 14.7 | 19 | 38 | 25 | 80 |
| 43 | 61.5 | 133 | 14.7 | 19 | 38 | 25 | 80 |
| 45 | 63.5 | 140 | 14.7 | 19 | 38 | 25 | 82 |
| 48 | 66.5 | 140 | 14.7 | 19 | 38 | 25 | 82 |
| 50 | 68.5 | 140 | 14.7 | 19 | 38 | 25 | 87 |
| 53 | 71.5 | 150 | 17.5 | 19 | 38 | 25 | 92 |
| 55 | 73.5 | 150 | 17.5 | 19 | 38 | 25 | 92 |
| 60 | 78.5 | 160 | 17.5 | 19 | 38 | 25 | 100 |
| 65 | 83.5 | 165 | 17.5 | 19 | 38 | 25 | 105 |
| 70 | 88.5 | 180 | 17.5 | 19 | 38 | 25 | 120 |
| 75 | 100 | 190 | 17.5 | 20.5 | 41.5 | 30 | 125 |
| 80 | 105 | 190 | 17.5 | 20.5 | 41.5 | 30 | 130 |
| 85 | 110 | 220 | 21.5 | 20.5 | 41.5 | 30 | 135 |
| 90 | 115 | 220 | 21.5 | 20.5 | 41.5 | 30 | 140 |
| 95 | 120 | 220 | 21.5 | 20.5 | 41.5 | 30 | 145 |
| 100 | 125 | 220 | 21.5 | 20.5 | 41.5 | 30 | 150 |
| D1 (inch) | D2 | D3 | D5 | L1 | L2 | L3 | L5 |
| 1.000 | 1.713 | 4.094 | 0.492 | 0.748 | 1.496 | 0.984 | 2.441 |
| 1.125 | 1.831 | 4.094 | 0.492 | 0.748 | 1.496 | 0.984 | 2.441 |
| 1.250 | 1.988 | 4.094 | 0.492 | 0.748 | 1.496 | 0.984 | 2.638 |
| 1.375 | 2.107 | 4.331 | 0.492 | 0.748 | 1.496 | 0.984 | 2.756 |
| 1.500 | 2.225 | 4.921 | 0.579 | 0.748 | 1.496 | 0.984 | 2.953 |
| 1.625 | 2.382 | 5.236 | 0.579 | 0.748 | 1.496 | 0.984 | 3.150 |
| 1.750 | 2.500 | 5.512 | 0.579 | 0.748 | 1.496 | 0.984 | 3.228 |
| 1.875 | 2.618 | 5.512 | 0.579 | 0.748 | 1.496 | 0.984 | 3.228 |
| 2.000 | 2.697 | 5.906 | 0.579 | 0.748 | 1.496 | 0.984 | 3.425 |
| 2.125 | 2.815 | 6.102 | 0.689 | 0.748 | 1.496 | 0.984 | 3.622 |
| 2.250 | 3.012 | 6.299 | 0.689 | 0.748 | 1.496 | 0.984 | 3.937 |
| 2.375 | 3.091 | 6.469 | 0.689 | 0.748 | 1.496 | 0.984 | 3.937 |
| 2.500 | 3.209 | 6.693 | 0.689 | 0.748 | 1.496 | 0.984 | 4.055 |
| 2.625 | 3.406 | 7.067 | 0.689 | 0.748 | 1.496 | 0.984 | 4.724 |
| 2.750 | 3.484 | 7.480 | 0.689 | 0.748 | 1.496 | 0.984 | 4.724 |
| 2.875 | 3.858 | 7.480 | 0.689 | 0.807 | 1.634 | 1.181 | 4.843 |
| 3.000 | 3.937 | 7.480 | 0.689 | 0.807 | 1.634 | 1.181 | 4.921 |
| 3.125 | 4.134 | 8.661 | 0.689 | 0.807 | 1.634 | 1.181 | 5.118 |
| 3.250 | 4.252 | 8.661 | 0.846 | 0.807 | 1.634 | 1.181 | 5.236 |
| 3.375 | 4.331 | 8.661 | 0.846 | 0.807 | 1.634 | 1.181 | 5.315 |
| 3.500 | 4.528 | 8.661 | 0.846 | 0.807 | 1.634 | 1.181 | 5.512 |
| 3.625 | 4.606 | 8.661 | 0.846 | 0.807 | 1.634 | 1.181 | 5.591 |
| 3.750 | 4.725 | 8.661 | 0.846 | 0.807 | 1.634 | 1.181 | 5.709 |
| 3.875 | 4.921 | 8.661 | 0.846 | 0.807 | 1.634 | 1.181 | 5.906 |
| 4.000 | 4.921 | 8.661 | 0.846 | 0.807 | 1.634 | 1.181 | 5.906 |
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
Water Booster Station: Replaced 20 Grundfos seals in 5 days vs 8 weeks OEM lead time. 40% cost saving for the municipality.
Testimonials
These seals fit our Grundfos CRN pumps perfectly. We've switched all our maintenance to Miaoyu's cartridges and haven't looked back.
—Facility Manager, Water Treatment Plant
FAQs about Metal Bellows Seals for High Temperature Pumps
Q: Does this seal replace the HQQE and HQQV codes?
A: Yes. We offer exact material matches: select EPDM (HQQE) for drinking water and heating applications, or FKM (HQQV) for industrial oils and aggressive fluids. The dimensions are identical to the OEM part, ensuring a perfect fit.
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
