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KOS Valves – Precision. Reliability. Innovation.

Leading manufacturer of industrial valves including Ball Valves, Gate Valves, Globe Valves, Check Valves, and Bellows Sealed Solutions for global applications.

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About KOS Valves

KOS Valves is a professional manufacturer specializing in the design, development, and production of high-quality industrial valves. With years of experience and a commitment to excellence, we deliver reliable valve solutions for oil & gas, petrochemical, power generation, water treatment, and other critical industries.

Our product range includes Ball Valves, Gate Valves, Globe Valves, Check Valves, Bellows Sealed Valves, and more. We combine advanced engineering with strict quality control to ensure every valve meets international standards and customer expectations.

50+
Countries Served
20+
Years Experience
KOS Valves Manufacturing Facility

Our Products

High-performance industrial valves engineered for durability, safety, and efficiency across diverse applications.

Floating Ball Valves

Floating Ball Valves

Compact and reliable design ideal for low to medium pressure applications. Available in various materials and end connections.

  • Full or reduced bore options
  • API 6D, ISO 5211 compliant
  • Fire-safe design available
Trunnion Mounted Ball Valves

Trunnion Mounted Ball Valves

Designed for high-pressure and large-diameter applications with superior sealing and lower operating torque.

  • Bidirectional sealing
  • Anti-static design
  • ISO 17292 compliant
Gate Valves

Gate Valves

Rugged construction for on/off service in pipelines. Available in rising stem and non-rising stem configurations.

  • API 600, BS 1414 standards
  • Wedge and parallel slide options
  • Cast and forged body types
Globe Valves

Globe Valves

Ideal for throttling and regulating flow with precise control and tight shut-off capabilities.

  • ANSI B16.34 compliant
  • Multiple trim options
  • Rising stem with indicator
Check Valves

Check Valves

Prevent backflow in piping systems with swing, lift, and dual plate designs for various flow conditions.

  • API 598 tested
  • Low pressure drop
  • Available with bypass
Bellows Sealed Valves

Bellows Sealed Valves

Zero-emission solutions for hazardous and toxic media using metal bellows to eliminate stem leakage.

  • Hermetic sealing
  • Meets ISO 15848 standards
  • Long service life
Butterfly Valves

Butterfly Valves

Lightweight and cost-effective solution for on/off and throttling service in large diameter lines.

  • Lug and wafer types
  • Resilient and metal seated
  • ISO 10631 compliant
Y-Strainers

Y-Strainers

Protect downstream equipment by removing debris and particulates from fluid systems.

  • Replaceable mesh baskets
  • Compact Y-design
  • API 6D compatible
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Quality & Technology

Advanced R&D and Design Capabilities

KOS Valves invests heavily in research and development to stay at the forefront of valve technology. Our engineering team utilizes cutting-edge tools to ensure optimal performance and reliability.

  • Auto-CAD & 3D Mould Design: Precision modeling for optimal flow dynamics and structural integrity.
  • Material Testing: Comprehensive evaluation of alloys and seals under extreme conditions.
  • Finite Element Analysis (FEA): Stress and thermal analysis for critical components.
  • Quality Policy: Commitment to continuous improvement in product quality and customer satisfaction.

Quality Assurance Process

  1. 1 Raw Material Inspection
  2. 2 In-Process Quality Checks
  3. 3 Dimensional Verification
  4. 4 Pressure and Leak Testing
  5. 5 Final Inspection & Packaging

Certifications & Compliance

Our valves meet international standards to ensure safety, performance, and regulatory compliance.

ISO 9001:2008 (DNV)

Quality Management System

PED (CE)

Pressure Equipment Directive

TS Certification

Special Equipment Manufacturing

API 6D, API 600

American Petroleum Institute

Contact KOS Valves

Get in touch with our team for product inquiries, technical support, or partnership opportunities.

Contact Information

  • Tel: 0086 (0)577 67915678
  • Fax: 0086 (0)577 67917557
  • Address: HeYi Industrial Zone, Yongjia, Zhejiang Province, China
  • Skype: Available upon request

Visit Our Website

Explore our full product range, download catalogs, and access technical documentation.

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