Core Value Proposition & Technical Hierarchy
Don't let long OEM lead times or high markups slow down your operations. We engineer high-performance mechanical seals that are 100% interchangeable with the world's leading brands. From industrial process pumps to sanitary food pumps, our replacements respect original dimensional tolerances while offering material upgrades and factory-direct savings.
Major Brand Compatibility Matrix
Based on the brands listed in your image, we categorize them into three operational sectors for easier navigation.
Industrial Process & General Seals
For heavy-duty applications in oil, gas, chemical, and general processing.
● John Crane Replacement ● Burgmann Replacement
● Flowserve Replacement ● AES Replacement
● Roten Replacement
Submersible & Water Treatment Seals
Specialized double seals and cartridge units for wastewater and drainage.
● Flygt Pump Seal Replacement
● Grundfos Pump Seal Replacement
Sanitary & Hygienic Pump Seals
FDA-compliant materials for food, beverage, and pharmaceutical lines.
● Alfa Laval Replacement
● APV Pump Replacement
Our Structure-Focused Product Series
Alfa laval replacement
Alfa laval replacement
MIAOYU is a leading Alfa Laval mechanical seals manufacturer​ in China, specializing in precision-engineered replacement seals for Alfa Laval sanitary and industrial pumps. Our comprehensive range includes direct-fit Alfa Laval pump mechanical seal​ solutions for popular models such as LKH, SRU, SolidC, and MR series, ensuring full interchangeability with OEM parts. Designed for demanding applications in dairy, food & beverage, pharmaceutical, and chemical processing, each Alfa Laval pump seal​ is manufactured with hygienic materials (including FDA-compliant elastomers and SiC/TC faces) to withstand CIP/SIP cycles, high temperatures, and aggressive media. We offer custom configurations for single, double, and cartridge seals, providing reliable performance that matches original equipment standards at a competitive cost.
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APV pump replacement
APV pump replacement
MIAOYU is a leading APV pump mechanical seal manufacturer​ in China, specializing in precision-engineered replacement seals for the complete range of SPX APV sanitary and industrial pumps. Our extensive catalog offers direct-fit APV pump seal​ solutions for popular models including the W, W+, World, V2, PUMA, ZM agitator, and DW series. Designed as true OEM-equivalent replacements, each APV mechanical seal​ is manufactured to restore original performance in demanding food, dairy, beverage, and pharmaceutical processing applications. We provide comprehensive coverage for the most common APV shaft diameters—including 20mm, 22mm, 25mm, 30mm, 32mm, 35mm, 40mm, and 45mm—ensuring a perfect fit for your specific pump model without modification. Our seals are available in a variety of material configurations to meet stringent hygienic standards, including FDA-compliant elastomers (NBR, EPDM, FKM/Viton), silicon carbide (SiC), tungsten carbide (TC), and carbon/ceramic face pairs. Whether you need a standard single seal, a robust double seal for hazardous fluids, or a custom-engineered cartridge seal for simplified maintenance, MIAOYU delivers reliable, leak-free performance with competitive pricing and fast lead times.
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Burgmann replacement
Burgmann replacement
MIAOYU is a leading Burgmann mechanical seal manufacturer​ and supplier in China, specializing in high-performance, direct-interchange replacement seals for the globally renowned EagleBurgmann brand. Our comprehensive product line is engineered to meet or exceed OEM specifications, offering a reliable and cost-effective alternative for maintenance, repair, and operations (MRO) across various industries, including chemical processing, oil & gas, water treatment, and power generation. We provide extensive coverage of the most popular and widely used Burgmann mechanical seal​ series, ensuring seamless compatibility and easy installation. Our catalog includes precision replacements for the industry-standard MG1​ and MG12​ elastomer bellows seals, ideal for general-purpose and wastewater applications. For demanding high-pressure and high-temperature environments, we offer robust equivalents to the H7N​ and H75N​ balanced seals. Additionally, our range covers specialized models such as the M3N/M32/M37N​ for centrifugal pumps, the M2N​ for submersible pumps, the HJ92N​ for vertical turbine pumps handling abrasive media, and advanced dry gas seals for monoblock pumps. Each Burgmann replacement seal​ is manufactured using premium materials such as silicon carbide (SiC), tungsten carbide (TC), carbon, and high-grade elastomers (Viton/FKM, EPDM, NBR) to ensure superior wear resistance, chemical compatibility, and long service life. With a focus on dimensional accuracy and functional reliability, MIAOYU delivers drop-in solutions that restore original equipment performance while significantly reducing downtime and procurement costs. Our technical support team is available to assist with custom configurations for specific shaft sizes, pressures, and material requirements.
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Flowserve replacement
Flowserve replacement
As a leading Flowserve mechanical seal manufacturer, Miaoyu delivers high-performance Flowserve mechanical seal​ replacements that ensure direct interchangeability and reliable operation. Our Flowserve seals​ match original specifications in dimensions, pressure ratings, and temperature ranges, providing a seamless mechanical seal replacement​ experience. We cover a wide product scope including Flowserve double mechanical seal​ assemblies for hazardous fluid containment, Flowserve cartridge seal​ units for easy installation and alignment-free mounting, Flowserve mixer seals​ for top-entry agitator and mixer applications, and the complete Flowserve pump seal​ lineup for centrifugal and positive displacement pumps. We enable quick turnaround for urgent maintenance needs with readily available configurations, minimizing downtime. Our reverse-engineering expertise and rigorous testing ensure every seal performs to or exceeds OEM standards. As a dedicated Flowserve mechanical seal manufacturer, we combine full material traceability with the flexibility to customize Flowserve seals​ for specific API plans or fluid compatibility. Partner with us for OEM-grade Flowserve pump seal, Flowserve cartridge seal, Flowserve double mechanical seal, and Flowserve mixer seals​ solutions.
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Flygt pump seal replacement
Flygt pump seal replacement
As leading flygt pump mechanical seal replacement manufacturer, MIAOYU provides a comprehensive range of OEM/ODM mechanical seals engineered as direct replacements for Flygt (Xylem) submersible and wastewater pumps. This product line is specifically designed to meet the demanding conditions of sewage, sludge, and abrasive slurry applications, offering reliable alternatives to original Flygt Griploc and bellow-type seals.
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Grundfos pump seal replacement
Grundfos pump seal replacement
Looking for reliable Grundfos pump seal replacement​ parts? As a trusted Grundfos mechanical seal manufacturer, we offer a complete range of high-performance mechanical seals engineered for exact OEM compatibility. Our Grundfos mechanical seal replacement​ solutions are designed to restore pump efficiency and prevent leaks in demanding applications. Choose from various configurations including cartridge seals, metal bellows, and submersible pump seals. Materials like tungsten carbide, silicon carbide, and carbon/ceramic ensure durability against abrasion and corrosion. Whether you need standard replacements or custom-engineered seals, our products meet strict quality standards for long service life. Contact us for expert support and competitive pricing on bulk orders.
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John crane replacement
John crane replacement
Premium John Crane interchange seals with stable sealing and long service life. MIAOYU offers a comprehensive range of direct-interchange John Crane replacement mechanical seals, engineered to match original specifications for reliable performance in pumps, mixers, and reactors. This category covers popular models including Type 1, Type 2, 8B/9B, 58B/59B, 4610/5610, and 2100 series, ensuring seamless compatibility and reduced downtime for maintenance. We provide versatile material combinations (SiC, TC, Carbon, various elastomers) to handle diverse media from water and chemicals to oils and high-temperature fluids. With a focus on durability and cost-effectiveness, these seals are ideal for industries requiring OEM-level quality with the flexibility of custom solutions.
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Roten replacement
Roten replacement
As a specialized Roten mechanical seal manufacturer​ and supplier, we provide high-quality replacement seals that ensure full compatibility with Roten's original specifications. Our products are engineered for demanding applications in chemical, pharmaceutical, food, and water treatment industries, offering reliable performance and extended service life. We supply a comprehensive range of seals, including cartridge and metal bellows types, manufactured with precision using materials like silicon carbide, tungsten carbide, and alumina ceramic. Whether you need standard replacements or custom solutions, our team delivers cost-effective alternatives without compromising on quality. Contact us for expert support and competitive pricing on bulk orders.
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AES replacement
AES replacement
As a leading AES mechanical seal manufacturer, MiaoYu Seals specializes in producing premium AES cartridge seal​ replacements with full OEM compatibility. We supply a comprehensive range of high-performance seals designed to match popular AES models, including the widely used CURC/CURE series​ for general pump applications, CSS/CSSN series​ for heavy-duty slurry and chemical services, and CDSA series​ double cartridge seals for hazardous fluid containment. Our products are engineered with precision materials like silicon carbide and tungsten carbide to ensure durability and leak-free operation in demanding industrial environments. Whether you need standard replacements or custom solutions, we offer reliable alternatives that meet original performance specifications. Contact us for competitive pricing and expert technical support.
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The Science of Replacement

Is "Replacement" as good as "Original"?

Yes, and often better. We use Coordinate Measuring Machines (CMM) to reverse-engineer OEM seals to within micron-level tolerances. But we don't just copy; we optimize:

Material Upgrade:
We replace standard ceramic faces (brittle) with Silicon Carbide (tougher) for Grundfos and Roten replacements.

Design Simplification:
For older Flygt pumps, we offer modernized cartridge units that are easier to install than the original multi-part seals.

Frequently Asked Questions (FAQ)

  • Do I need the OEM part number to order?
    A: No, you don’t need the OEM part number to place an order. We can identify the correct seal based on your pump model, equipment type, dimensions, or application details.
  • Q: Will using a Roten or AES replacement void my warranty?
    A: Using our high-quality interchangeable replacements will not automatically void your equipment warranty. Our seals meet or exceed original performance standards and are designed for direct interchangeability.
  • Q: Are your sanitary seals (Alfa Laval/APV) FDA certified?
    A: Yes, our sanitary seals for Alfa Laval and APV are manufactured with FDA-compliant materials, suitable for food, beverage, pharmaceutical and hygienic applications.
  • Q: What’s your minimum order quantity (MOQ)?
    A: We accept small orders and trial orders with no strict MOQ, supporting both small‑batch maintenance and large‑scale bulk procurement.