Expanded Graphite Valve Packing, Carbon Fiber, 4-18mm, PN300

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Product Detail

Company Info

 

Product Detail

Company Info

 

China Low Emission Valve and Seal Manufacturer Offers High-End Low-E Valves, Low-Leakage Graphite Packing, and Gaskets for Zero-Leakage Valve Requirements.

As a leading manufacturer of industrial valves, packing, gaskets, and seal kits, Magpie Valve (https://www.magpievalves.com/) is a research-driven enterprise committed to advancing valve technology through material science, precision engineering, and independently verified performance. Our mission is to redefine the role of valves in critical industrial applications by focusing on the core factors that determine true reliability—especially sealing performance.

While large-scale machining is no longer the primary challenge in China’s valve industry, the real bottlenecks lie in the mechanical behavior of non-metallic materials, advanced coating technologies, and the complex friction and wear mechanisms within sealing interfaces. Magpie Valve places these often-overlooked technical disciplines at the center of our innovation strategy.

Our multidisciplinary team includes nuclear-grade sealing engineers, valve specialists, materials scientists, and electromechanical engineers. Combining academic rigor with real-world manufacturing expertise, we deliver high-integrity valve solutions built on scientific understanding rather than trial and error. We have partnered with leading research institutions—such as the National Key Friction Laboratory of Lanzhou University of Technology, the Ningbo Institute of Materials, East China University of Science and Technology, and the Shanghai Institute of Ceramics—to conduct deep studies on low-leakage graphite sealing technologies and systematically address the root causes of sealing failure.

Supported by rigorous testing and authoritative third-party validation, Magpie Valve holds industry-recognized certifications including API 622, API 624, API 641, ISO 15848-1, TA-LUFT, and ISO 15848-1 CC3. To date, we have evaluated nearly 500 valve products—including gate, globe, and ball valves—under extreme operating conditions ranging from 400°C to −196°C and pressures up to Class 2500 LB. Through these efforts, we not only ensure full compliance with international standards but also set new benchmarks for reliability, safety, and innovation in the global valve industry.