Zhengyuan Valve Group Co., Ltd., located in Wenzhou’s “China Valve City,” has established a quality inspection system incorporating eddy current, ultrasonic, and magnetic particle testing. Eddy current testing detects surface and near-surface defects such as cracks and stress corrosion in valve stems and bodies. Ultrasonic testing identifies internal defects in pressure-containing parts, while magnetic particle testing finds surface cracks in ferromagnetic materials.

  With pressure ratings from 150Lb to 2500Lb and temperature ranges from -196°C to 800°C, the company’s forged steel valves serve petrochemical and power applications. Through systematic NDT application, Zhengyuan provides reliable quality assurance for industrial valve products.