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

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As a specialized carbon mechanical seal manufacturer, MiaoYu Seals produces premium graphite mechanical seal​ components and assemblies for demanding industrial applications. Our carbon mechanical seal​ solutions are engineered for superior thermal stability and low friction, while the graphite mechanical seal​ faces offer excellent self-lubrication and chemical resistance. We supply a wide range of popular models, including cartridge seals for Grundfos TP/NB series, component seals for Roten Type 3/Uniten pumps, and hygienic seals for Alfa Laval sanitary pumps. Whether you need standard replacements or custom-designed seals, our products ensure OEM-compatible performance in water, chemical, and food processing industries. Contact us for competitive pricing and bulk order support.
img of Carbon/Graphite Mechanical Seals for Alfa Laval Water Pump

Carbon/Graphite Mechanical Seals for Alfa Laval Water Pump

Carbon graphite mechanical seals are drop-in OEM-interchangeable Alfa Laval pump mechanical seal replacements for LKH, SolidC and MR series water pumps. Featuring FDA-grade self-lubricating carbon graphite faces, this Alfa Laval mechanical seal resists thermal shock from CIP/SIP cycles, allows dry-run tolerance during tank emptying, and uses an open hygienic geometry for tool-free cleaning—supplied direct from our ISO 9001 factory at competitive cost.

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img of Carbon Graphite Mechanical Seals Replacement for Grundfos Pump

Carbon Graphite Mechanical Seals Replacement for Grundfos Pump

Carbon graphite mechanical seal assemblies are drop-in OEM-interchangeable grundfos pump mechanical seals for CR, CRN, NK, TP and CHI series circulators and multistage boosters. Featuring self-lubricating FDA-grade carbon graphite rotating faces paired with tungsten carbide or SiC stationary seats, they resist thermal cycling in HVAC and domestic water duty, tolerate brief dry-run, and ship factory-direct from our ISO 9001 workshop at wholesale cost.

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img of Roten Carbon/Graphite Mechanical Seal for Tullu Pump

Roten Carbon/Graphite Mechanical Seal for Tullu Pump

• Unitized Assembly: The spring, bellow, and drive ring are a single unit, making it impossible to lose parts during field repair.

• Soft Face: The carbon face conforms quickly to the mating seat, ensuring a tight seal almost immediately after installation without a long break-in period.

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img of Roten Carbon/Graphite Mechanical Seal for Tullu Pump

Roten Carbon/Graphite Mechanical Seal for Tullu Pump

• Protective Sleeve: The cartridge sleeve protects the 20mm/22mm shaft from wear by the O-rings or set screws.

• Hydraulic Balance: Balanced face design allows it to handle pressure spikes better than standard unbalanced component seals in small booster systems.

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img of Carbon/Graphite Elastomer Mechanical Packing Seal

Carbon/Graphite Elastomer Mechanical Packing Seal

• Leak-Free Upgrade: Converts a dripping stuffing box into a zero-leakage system, improving plant hygiene and safety.

• Low Friction: Carbon reduces power consumption compared to the high drag of tight gland packing.

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img of Chemical Industry Carbon/Graphite Cartridge Mechanical Seals

Chemical Industry Carbon/Graphite Cartridge Mechanical Seals

• Non-Sparking: Carbon faces are non-sparking, making them safer for handling flammable solvents than metal-to-metal contact.

• Heat Dissipation: The low coefficient of friction generates minimal heat, preventing the vaporization of volatile chemicals at the seal face.

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img of 20mm 22mm Carbon/Graphite Cartridge Mechanical Seal

20mm 22mm Carbon/Graphite Cartridge Mechanical Seal

The robust graphite cartridge mechanical seal features a stationary cartridge design, it is a direct, high-performance replacement for OEM seals in water, chemical, and general industrial pumps. 

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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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    Tell us your sealing requirements (working conditions, media, dimensions, etc.), and our engineers will provide a tailored solution and quote within 24 hours. Your inquiry is 100% confidential.
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