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Precision Mechanical Seals for Industrial Pumps

High-performance replacements for John Crane, Burgmann, Flowserve & AES — engineered in China since 1996.

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Wenzhou HuaKang Factory

Who We Are

Wenzhou HuaKang Mechanical Seal Factory is located in the coastal city of Wenzhou, Zhejiang Province, China. Established in 1996, we specialize in the design, manufacturing, and global distribution of high-quality mechanical seals for a wide range of industrial applications.

Our expertise spans multiple seal types including cartridge, metal bellows, single spring, multi-spring, and wave spring configurations. We use premium sealing materials such as graphite, silicon carbide, tungsten carbide, ceramic, stainless steel, and advanced rubber compounds.

All our products are engineered to directly replace equivalent models from leading brands like John Crane, Burgmann, Flowserve, and AES, offering superior performance at competitive prices.

1996
Founded
25+
Countries Served
100+
Pump Brands Supported

Quality & Capabilities

Certifications

Our manufacturing processes adhere to international quality standards. While specific certification names are not listed, our long-standing reputation and global client base reflect our commitment to excellence and reliability.

Compliant with ISO and industry-specific requirements for mechanical seal performance and safety.

Advanced Equipment

Equipped with precision CNC machining centers, automated assembly lines, and rigorous testing stations to ensure every seal meets exact dimensional and performance tolerances.

  • CNC Lathes & Milling Machines
  • Laser Marking Systems
  • Pressure & Leak Testing Rigs
  • Material Hardness & Surface Finish Testing

Our Premium Mechanical Seals

HK307E Mechanical Seal

HK307E

Suitable for Johnson Positive Displacement Pumps.

  • Type: Single Spring
  • Application: Positive Displacement
  • Compatibility: Johnson Pumps
HK810 Mechanical Seal

HK810

Elastomer bellows, unbalanced, dual directional.

  • Type: Elastomer Bellows
  • Balance: Unbalanced
  • Direction: Dual
HK310C Mechanical Seal

HK310C

Multi-spring seal compatible with John Crane, Burgmann, Flowserve.

  • Type: Multi-Spring
  • Replacement: John Crane, Burgmann
  • Material Options: SiC, TC, Ceramic
HK985 Mechanical Seal

HK985

Metal bellows, balanced, dual directional.

  • Type: Metal Bellows
  • Balance: Balanced
  • Direction: Dual

HK531B

For stainless steel vertical multistage centrifugal pumps.

  • Type: Cartridge Seal
  • Pump Type: Vertical Multistage
  • Material: SS, Graphite, SiC

HK535

Single cartridge seal replaces John Crane, Burgmann, AES models.

  • Type: Cartridge
  • Compatibility: John Crane, Burgmann, AES
  • Installation: Easy-fit design

HK160

Double face kits with colletto for EMU pumps.

  • Type: Double Face Kit
  • Compatibility: EMU Pumps
  • Design: Colletto Mounting

Alfa Laval Seal

Precision seals for Alfa Laval pump systems.

  • Brand: Alfa Laval
  • Type: Custom Fit
  • Materials: SS, Graphite, Ceramic

Why Choose Our Mechanical Seals?

Direct Replacements

Engineered to match John Crane, Burgmann, Flowserve, and AES specifications exactly.

Premium Materials

Graphite, silicon carbide, tungsten carbide, ceramic, and stainless steel construction.

Industrial Durability

Built for harsh environments — high pressure, temperature, and corrosive media.

Global Support

Serving clients in Europe, Asia, Americas, and the Middle East with fast delivery.

28+
Years in Business
10,000+
Units Shipped Annually
50+
Global Clients
100%
Quality Tested

Frequently Asked Questions

Do your seals really replace John Crane and Burgmann models?

Yes. Our HK310C, HK535, and other models are specifically engineered to match the dimensions, materials, and performance of equivalent John Crane, Burgmann, and Flowserve seals.

What materials do you use in your seals?

We use high-grade materials including graphite, silicon carbide (SiC), tungsten carbide (TC), ceramic, stainless steel, and various elastomers depending on the application.

Can you customize seals for specific pump models?

Absolutely. We offer OEM and custom design services for unique or obsolete pump models. Send us your specifications for a quote.

What is the lead time for orders?

Standard products ship within 5–7 business days. Custom orders typically take 2–3 weeks depending on complexity.

Do you offer technical support?

Yes. Our engineering team provides full technical assistance for selection, installation, and troubleshooting.

Get in Touch

Contact Wenzhou HuaKang Mechanical Seal Factory for quotes, technical support, or custom solutions.

Phone

+0086-577-80126008

Fax

+0086-577-86600862

Email

sales@mech-seals.com

Contact Person

Richard

Address

Industry Zone Of PingYang, WenZhou City, ZheJiang, China

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