Founded in 2003 and headquartered in Beijing, KATZ (TZFM) specializes in the R&D and manufacturing of valves, with in-house capabilities including precision casting, CNC machining, and automatic welding. Its products are manufactured in accordance with GB, JB, API, ANSI, DIN, JIS, and other international standards. The company's main product lines include ball valves, butterfly valves, gate valves, globe valves, check valves, hydraulic control valves, cryogenic valves, bellows seal valves, as well as pipe fittings and expansion joints. In total, the portfolio covers 265 series and nearly 3,000 specifications, with bore sizes ranging from DN6 to DN4000, pressure ratings from 0.25 to 32.0 MPa, and temperature ranges from -196°C to 800°C. These products are widely used in water supply, HVAC, petroleum, chemical, power generation, metallurgy, mining, marine, food, pharmaceutical, and other industries.