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NINGBO MIAOYU MACHINERY TECHNOLOGY CO., LTDNINGBO MIAOYU MACHINERY TECHNOLOGY CO., LTD

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Cartridge Mechanical Seals

Flygt Metal Bellow Mechanical Seal Replacement

Spring Cartridge Component Seal for High Pressure Pump
thumb Spring Cartridge Component Seal for High Pressure Pump

Flygt Metal Bellow Mechanical Seal Replacement

• AM350/Hastelloy Bellows: Constructed from high-strength bellow materials that resist fatigue and corrosion in aggressive sewage environments.

• Self-Cleaning Action: The rotation of the bellow creates a centrifugal effect that flings solids away from the seal face area.

Model:300A
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Key Features

• Clog-Free Design: The metal bellow construction has no sliding O-ring to get stuck, ensuring the seal face stays closed even in sticky sludge.

• High-Temperature Capability: Perfect for industrial wastewater or hot sumps where temperatures exceed the limits of standard NBR/FKM seals.

• Plug-and-Play Fit: Engineered to fit the exact seal chamber dimensions of Flygt 2000 and 3000 series pumps without modification.



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


CF300A-1.jpg
CF300A-2.jpg



Product Specifications

D1 (mm) D2 D3 D5 L1 L2 L3 L5
25 40 104 12.5 9 48 25 62
28 43 104 12.5 9 48 25 62
30 45 104 12.5 9 48 25 67
32 47 104 12.5 9 48 25 67
33 47 104 12.5 9 48 25 67
35 50 110 12.5 9 48 25 70
38 53 125 14.7 9 48 25 75
40 55 125 14.7 9 48 25 75
42 57 133 14.7 9 48 25 80
43 58 133 14.7 9 48 25 80
45 60 140 14.7 9 48 25 82
48 63 140 14.7 9 48 25 82
50 65 140 14.7 9 48 25 87
53 68 150 17.5 9 48 25 92
55 70 150 17.5 9 48 25 92
60 75 160 17.5 9 48 25 100
65 80 165 17.5 9 48 25 105
70 85 180 17.5 9 48 25 120
75 95 190 17.5 8 54 30 125
80 100 190 17.5 8 54 30 130
85 105 220 21.5 8 54 30 135
90 110 220 21.5 8 54 30 140
95 115 220 21.5 8 54 30 145
100 120 220 21.5 8 54 30 150


D1 (inch) D2 D3 D5 L1 L2 L3 L5
1.000 1.575 4.094 0.492 0.354 1.890 0.984 2.441
1.125 1.693 4.094 0.492 0.354 1.890 0.984 2.441
1.250 1.850 4.094 0.492 0.354 1.890 0.984 2.638
1.375 1.969 4.331 0.492 0.354 1.890 0.984 2.756
1.500 2.087 4.921 0.579 0.354 1.890 0.984 2.953
1.625 2.244 5.236 0.579 0.354 1.890 0.984 3.150
1.750 2.362 5.512 0.579 0.354 1.890 0.984 3.228
1.875 2.480 5.512 0.579 0.354 1.890 0.984 3.228
2.000 2.559 5.906 0.579 0.354 1.890 0.984 3.425
2.125 2.677 6.102 0.689 0.354 1.890 0.984 3.622
2.250 2.874 6.299 0.689 0.354 1.890 0.984 3.937
2.375 2.953 6.469 0.689 0.354 1.890 0.984 3.937
2.500 3.071 6.693 0.689 0.354 1.890 0.984 4.055
2.625 3.268 7.067 0.689 0.354 1.890 0.984 4.724
2.750 3.346 7.480 0.689 0.354 1.890 0.984 4.724
2.875 3.661 7.480 0.689 0.315 1.516 1.181 4.843
3.000 3.740 7.480 0.689 0.315 1.516 1.181 4.921
3.125 3.937 8.661 0.689 0.315 1.516 1.181 5.118
3.250 4.055 8.661 0.846 0.315 1.516 1.181 5.236
3.375 4.134 8.661 0.846 0.315 1.516 1.181 5.315
3.500 4.331 8.661 0.846 0.315 1.516 1.181 5.512
3.625 4.409 8.661 0.846 0.315 1.516 1.181 5.591
3.750 4.528 8.661 0.846 0.315 1.516 1.181 5.709
3.875 4.724 8.661 0.846 0.315 1.516 1.181 5.906
4.000 4.724 8.661 0.846 0.315 1.516 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.


Metal Bellows Seals for High Temperature Pumps 606
Metal Bellows Seals for High Temperature Pumps 606
Metal Bellows Seals for High Temperature Pumps 606
Metal Bellows Seals for High Temperature Pumps 606



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.


R&D and Design.jpg
microscope.jpg
Light band detection.jpg
pressure test.jpg



Industry Solutions

Metal Bellows Seals for High Temperature Pumps 606
Metal Bellows Seals for High Temperature Pumps 606
Metal Bellows Seals for High Temperature Pumps 606
Metal Bellows Seals for High Temperature Pumps 606




Case Study

Tannery: Hot wastewater destroyed rubber seals in 3 months. Metal Bellow replacement extended life to 18 months.

Testimonials

We put these in our worst sump pits. They are expensive but they don't clog. Worth every penny for the reduced maintenance.

—Maintenance Manager, Industrial Park



FAQs about Metal Bellows Seals for High Temperature Pumps

Q: Does this fit the Flygt Plug-in seal models?

A: Yes, we have specific cartridge models engineered to replace the Plug-in seals. Our design incorporates the metal bellow technology inside the cartridge unit, providing a superior upgrade that fits directly into the existing pump housing without modification.

Please Contact Us!
Get Started With Your Next Project.
If you have any questions about our products and services, please feel free to contact us. Our team will get in touch with you within 24 hours!
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    Our company is specialized in the production of sealing materials, mechanical seals , cartridge seals.

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