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Precision Mechanical Seals for Demanding Applications

Flex MECH-SEAL (China) Co., Ltd. – ISO-certified manufacturer of high-performance mechanical seals for pumps, automotive, industrial, and OEM applications. Trusted by global leaders, with 80% of products exported worldwide.

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About Flex MECH-SEAL

FLEX MECH-SEAL (CHINA) Co., Ltd. is a leading manufacturer specializing in mechanical seal products for automotive, industrial, and OEM applications. With a strong commitment to quality and innovation, we have earned a reputation as a reliable and stable supplier of superior sealing solutions.

Our manufacturing processes are certified under ISO9001, ISO14001, and ISO/TS16949 standards. We serve as an appointed OEM supplier for renowned domestic and international enterprises, with over 80% of our products exported globally.

  • ISO9001, ISO14001, ISO/TS16949 Certified
  • OEM Supplier for Global Brands
  • 80% Export Rate to International Markets
  • Advanced R&D and Quality Control
Mechanical Seal Manufacturing Facility

Our Product Range

High-performance mechanical seals engineered for reliability, durability, and precision across diverse industrial and automotive applications.

Sanitary Pump Mechanical Seals

Sanitary Pump Mechanical Seals

Ideal for food, brewery, and dairy industries. Compliant with hygiene standards, corrosion-resistant materials.

  • • Tungsten Carbide / Silicon Carbide Faces
  • • FDA-Compliant Elastomers
  • • CIP/SIP Compatible
FGD Mechanical Seals

FGD Mechanical Seals

Designed for flue gas desulfurization systems. Resistant to abrasive slurries and corrosive environments.

  • • Double Seals with Barrier Fluid
  • • Tungsten Carbide Faces
  • • Corrosion-Resistant Alloys
Auto Cooling Pump Seals

Auto Cooling Pump Mechanical Seals

Engineered for automotive engine cooling systems. High thermal stability and long service life.

  • • Carbon vs. Ceramic Faces
  • • EPDM or NBR O-rings
  • • ISO/TS16949 Compliant
Air-Compress Mechanical Seals

Automobile Air-Compress Mechanical Seals

Reliable sealing for air conditioning compressors. Low friction, high efficiency design.

  • • PTFE or Viton Seals
  • • High-Speed Rotation Capable
  • • Leak-Proof Performance
Flygt & Grundfos Seal

Flygt & Grundfos Pump Seals

Direct replacement seals for Flygt and Grundfos pumps. Guaranteed compatibility and performance.

  • • OEM-Spec Materials
  • • Cartridge Design for Easy Install
  • • Wide Model Coverage
Cartridge Mechanical Seals

Cartridge Mechanical Seals

Pre-assembled units for quick installation. Eliminates field measurement errors.

  • • Single & Double Configurations
  • • API 682 Compliant Options
  • • Reduced Downtime
Metal Bellow Seals

Metal Bellow Mechanical Seals

No elastomers in process fluid. Ideal for high temp, cryogenic, and aggressive chemicals.

  • • Stainless Steel or Hastelloy Bellow
  • • Face Materials: SiC, WC
  • • Zero Leakage Design
PTFE Wedge Seals

PTFE Wedge Mechanical Seals

Chemically inert, low friction seals for corrosive and abrasive media.

  • • PTFE Bellows or Wedges
  • • Wide Temperature Range
  • • Excellent Chemical Resistance
O-Ring Mechanical Seals

O-Ring Mechanical Seals

Cost-effective, versatile seals with multiple elastomer options for various media.

  • • NBR, EPDM, Viton, PTFE Options
  • • Stationary & Rotating Designs
  • • Wide Pressure & Temp Range
Elastomer Bellow Seals

Elastomer Bellow Mechanical Seals

Flexible bellow design for misalignment tolerance and vibration resistance.

  • • EPDM, NBR, or Viton Bellows
  • • Single & Double Seals
  • • Low Maintenance
Agitator Seals

Agitator & Mixer Seals

Robust sealing for vertical shafts in reactors and mixing tanks.

  • • Double Seals with Buffer Systems
  • • High Torque Resistance
  • • API 682 Compliant
OEM Replacement Seals

OEM Replacement Seals

Exact replacements for John Crane, Burgmann, Flowserve, and other brands.

  • • Cross-Reference Available
  • • Same Performance, Lower Cost
  • • Global Technical Support
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Industry Applications

Our mechanical seals serve critical roles across diverse sectors worldwide.

Automotive Cooling Pumps

Reliable sealing for engine coolant circulation under high thermal cycling.

Air Conditioning Compressors

Hermetic sealing for refrigerant containment in mobile and stationary systems.

Water & Wastewater Pumps

Durable seals for clean water, sewage, and slurry handling in municipal systems.

Industrial Process Pumps

High-pressure, high-temperature seals for chemical, petrochemical, and power industries.

Food, Brewery & Dairy

Hygienic, cleanable seals meeting FDA and EHEDG standards for sanitary processing.

Swimming Pools & Spas

Corrosion-resistant seals for chlorinated and saltwater environments.

Advanced Materials & Components

We use premium materials to ensure maximum durability, chemical resistance, and performance under extreme conditions.

Seal Faces

  • • Tungsten Carbide (WC)
  • • Silicon Carbide (SiC)
  • • Carbon
  • • Ceramic

Elastomers

  • • NBR (Nitrile)
  • • EPDM
  • • Viton (FKM)
  • • PTFE

Metal Parts

  • • Stainless Steel (304, 316)
  • • Hastelloy
  • • Titanium
  • • Brass

Other Components

  • • Bushings & Washers
  • • Springs & Retainers
  • • Zirconia Parts
  • • PTFE Wedges
Mechanical Seal Components
80%
Export Rate
ISO
9001, 14001, TS16949
100+
Global Clients
20+
Years Experience

Frequently Asked Questions

What industries do your mechanical seals serve?

Our seals are used in automotive (cooling pumps, AC compressors), water & wastewater, food & beverage, chemical processing, power generation, HVAC, and industrial manufacturing.

Are your seals compatible with OEM brands like John Crane or Burgmann?

Yes, we manufacture direct replacement seals for John Crane, Burgmann, Flowserve, AES, ITT, Flygt, Grundfos, and many other brands. Contact us with your seal type for cross-reference.

What certifications do you hold?

We are certified under ISO9001 (Quality Management), ISO14001 (Environmental Management), and ISO/TS16949 (Automotive Quality Systems).

Can you customize mechanical seals for specific applications?

Yes, we offer OEM/ODM services with full engineering support. We can customize materials, dimensions, and configurations based on your technical requirements.

What is the typical lead time for orders?

Standard products: 10–15 days. Custom designs: 20–30 days depending on complexity. We maintain inventory for fast delivery on popular models.

Get in Touch

Contact Flex MECH-SEAL (China) Co., Ltd. for product inquiries, technical support, or OEM collaboration.

Contact Information

Company: FLEX MECH-SEAL (CHINA) Co., Ltd.

Address: 4th floor, Block B, Jianhua Industrial Park, NO.207-208, Qi Gu Deng, Zhou Shan Dong Road, 310015, Hangzhou, China

Factory: Jiangshan science and technology zone, yinzhou district, Ningbo China, 315191

Tel: 86-571-8586-5398

Fax: 86-571-8586-5066

Email: [email protected]

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