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Precision Valve Components for Industrial Excellence

Manufacturer of high-quality valve stems, balls, seats & sanitary pipe fittings with over 20 years of expertise in Wenzhou, China.

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About Naisi Metalworks

Naisi Metal Products Co., Ltd. is located in Wenzhou, Zhejiang, the birthplace of small and medium-sized enterprises. We are a professional manufacturer of valve accessories that integrates design, production, and sales. Our product line primarily includes core components of valves — valve balls, valve stems, and valve seats.

The founder and production technology team have been deeply involved in the valve industry for over 20 years, bringing rich experience in valve design and manufacturing. We offer OEM and ODM services and provide one-stop solutions to meet all customer requirements.

Factory Equipment Production Line

Why Choose Us?

  • 20+ years of industry expertise
  • Comprehensive quality assurance system
  • OEM & ODM production capabilities
  • Competitive pricing with high reliability
  • Global export experience

Founded in 2010, Naisi Metalworks has served clients across metallurgy, power, oil, chemical, coal, pharmaceuticals, and paper industries.

Our Products

High-precision valve components engineered for durability, performance, and compliance with international standards.

Valve Stem

Valve Stem

Precision-machined stems for gate, globe, and ball valves. Available in stainless steel and alloy materials.

Stem
Valve Ball

Valve Ball

High-sphericity balls for ball valves. Available in floating and trunnion-mounted designs.

Ball
Valve Seat

Valve Seat

Sealing seats made from PTFE, RPTFE, or metal for superior leak-tight performance.

Seat
Sanitary Pipe Fittings

Sanitary Pipe Fittings

Clamp, weld, and thread-end fittings for hygienic applications in food, pharma, and biotech.

Sanitary Fittings
Stainless Steel Stem

Stainless Steel Stem

Corrosion-resistant stems ideal for chemical and marine environments.

Stem
Forged Valve Ball

Forged Valve Ball

High-strength forged balls for high-pressure and high-temperature applications.

Ball
Soft Seated Valve Seat

Soft Seated Valve Seat

PTFE-based seats offering excellent sealing with low operating torque.

Seat
Tri-Clamp Fittings

Tri-Clamp Fittings

Hygienic fittings with quick-connect design for easy cleaning and maintenance.

Sanitary Fittings
Chrome-Plated Ball

Chrome-Plated Ball

Enhanced surface hardness and wear resistance for extended service life.

Ball
Sanitary Elbow

Sanitary Elbow

90° and 45° elbows in various diameters for seamless pipeline integration.

Sanitary Fittings
Teflon Seat

Teflon Seat

PTFE seats with low friction and excellent chemical resistance.

Seat
Adjustable Stem

Adjustable Stem

Customizable length and thread options for precise valve actuation.

Stem

Key Features

Engineered for performance, reliability, and compliance with global industrial standards.

Quality Assurance

Comprehensive quality control from raw material to final inspection ensures reliability and compliance.

Precision Engineering

CNC machining and advanced metrology ensure tight tolerances and consistent performance.

Global Applications

Trusted in metallurgy, power, oil, chemical, pharmaceutical, and paper industries worldwide.

20+

Years Experience

100+

Global Clients

500+

Product Variants

2010

Year Founded

Frequently Asked Questions

What materials do you use for valve balls?

We use stainless steel (304, 316, 316L), carbon steel, and alloy steels. Chrome plating is available for enhanced wear resistance.

Do you offer OEM/ODM services?

Yes, we welcome OEM and ODM orders. Our team can assist with design, prototyping, and mass production.

What industries do your products serve?

Our components are used in metallurgy, power plants, petroleum, chemical engineering, coal mining, pharmaceuticals, papermaking, and construction.

What is your minimum order quantity (MOQ)?

MOQ varies by product. Please contact us for specific details based on your requirements.

How do you ensure product quality?

We have a comprehensive quality assurance system that includes material inspection, in-process checks, and final testing using advanced metrology tools.

Get in Touch

For inquiries, quotes, or technical support, please reach out through our official website.

Contact Information

Phone: +86-150 5773 5858 (WeChat available)

Email: jocelyn003@126.com

Address: No.17 Binhai 3rd Road, Yongxin Street, Longwan District, Wenzhou City, Zhejiang Province, China

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