Alumina/Ceramic Cartridge Mechanical Seals for Food Industry

Alumina/Ceramic Cartridge Mechanical Seals for Food Industry

Alumina/ceramic cartridge mechanical seals are hygienic, OEM-style cartridge seals developed for food, beverage, dairy, pharmaceutical and clean-process pump applications. The seal combines food-grade alumina ceramic faces with FDA-compliant elastomers such as EPDM or silicone, making it suitable for potable water, juices, syrups, dairy products, CIP/SIP cleaning cycles and mildly acidic or oxidizing food media.

The cartridge construction allows quick, error-free installation—spring load, face alignment and gland dimensions are preset at the factory. Wetted metal parts are available in stainless steel or Hastelloy C and can be electropolished to reduce product adhesion and bacterial growth. Smooth exterior geometry plus flushable gland ports support effective cleaning, sterilization and hygiene compliance in sanitary pumping systems.

Model:270
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Key Features


• FDA Compliant Materials: Constructed with food-grade Ceramic faces and FDA-approved EPDM or Silicone elastomers, ensuring product safety.

• Corrosion Resistant: Alumina Ceramic provides superior resistance to oxidizing agents and acidic food products compared to standard metals.

• Hygienic Design: Smooth exterior geometry and flushable gland ports allow for effective cleaning and sterilization.

• Thermal Shock Resistance: Our specific ceramic grade is engineered to withstand the rapid temperature changes of hot water washdowns better than standard commercial ceramics.

• Polished Metal Surfaces: All wetted metal parts are electropolished to prevent product adhesion and bacterial growth.



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


CF270-1.jpg
CF270-2.jpg



Product Specifications


D1 (mm)D2D3D5L1L2L3L5
43.510412.519382562
2543.510412.519382562
2846.510412.519382562
3048.510412.519382567
3250.510412.519382567
3350.510412.519382567
3553.511012.519382570
3856.512514.719382575
4058.512514.719382575
4260.513314.719382580
4361.513314.719382580
4563.514014.719382582
4866.514014.719382582
5068.514014.719382587
5371.515017.519382592
5573.515017.519382592
6078.516017.5193825100
6583.516517.5193825105
7088.518017.5193825120
7510019017.520.541.530125
8010519017.520.541.530130
8511022021.520.541.530135
9011522021.520.541.530140
9512022021.520.541.530145
10012522021.520.541.530150


D1 (inch)D2D3D5L1L2L3L5
1.0001.7134.0940.4920.7481.4960.9842.441
1.1251.8314.0940.4920.7481.4960.9842.441
1.2501.9884.0940.4920.7481.4960.9842.638
1.3752.1074.3310.4920.7481.4960.9842.756
1.5002.2254.9210.5790.7481.4960.9842.953
1.6252.3825.2360.5790.7481.4960.9843.150
1.7502.5005.5120.5790.7481.4960.9843.228
1.8752.6185.5120.5790.7481.4960.9843.228
2.0002.6975.9060.5790.7481.4960.9843.425
2.1252.8156.1020.6890.7481.4960.9843.622
2.2503.0126.2990.6890.7481.4960.9843.937
2.3753.0916.4690.6890.7481.4960.9843.937
2.5003.2096.6930.6890.7481.4960.9844.055
2.6253.4067.0670.6890.7481.4960.9844.724
2.7503.4847.4800.6890.7481.4960.9844.724
2.8753.8587.4800.6890.8071.6341.1814.843
3.0003.9377.4800.6890.8071.6341.1814.921
3.1254.1348.6610.6890.8071.6341.1815.118
3.2504.2528.6610.8460.8071.6341.1815.236
3.3754.3318.6610.8460.8071.6341.1815.315
3.5004.5288.6610.8460.8071.6341.1815.512
3.6254.6068.6610.8460.8071.6341.1815.591
3.7504.7258.6610.8460.8071.6341.1815.709
3.8754.9218.6610.8460.8071.6341.1815.906
4.0004.9218.6610.8460.8071.6341.1815.906



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


Bottling Plant: Replaced expensive SiC with Ceramic for sugar syrup pumps. Reduced costs by 30% with perfect hygiene and cleaning results.

Testimonials


We use these on our juice transfer lines. They clean up easily during CIP cycles and handle the acidic fruit juice without any pitting.

—Maintenance Supervisor, Beverage Company



FAQs


Q: Is Alumina Ceramic brittle compared to other materials?

A: Alumina Ceramic is harder than steel but can crack under heavy mechanical impact. However, in a stable centrifugal pump environment, it is extremely durable. We use high-purity 99.5% Alumina to maximize strength and thermal shock resistance.


Q: Are alumina/ceramic cartridge seals safe for food and beverage applications?

A: Yes. The seal uses food-grade alumina ceramic faces with FDA-compliant EPDM or silicone secondary seals, making it suitable for dairy, juice, syrup, bottled water, pharmaceutical liquids and other hygienic processes. All wetted metal parts can be electropolished to reduce product adhesion and bacterial growth, supporting CIP/SIP cleaning and sanitary pump requirements.


Q: Is alumina ceramic too brittle for centrifugal food pumps?

A: Alumina ceramic is harder than steel and can crack under heavy mechanical impact, but in a stable centrifugal pump environment it is very durable. MIAOYU uses high-purity alumina and engineered ceramic grades that provide excellent wear resistance, corrosion resistance and thermal-shock performance during hot-water washdowns and frequent start/stop duty.


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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