China Steel Pipe, Valves, Flange, Pipe Fitting
China Valve Manufacturer Dervos is a world-class Valve Manufacturer Supplier & Exporter, providing Valves, Steel Pipe, Flange, Pipe Fitting, and Fasteners for gas, oil, water, acid and steam pipe system. Our Valve products include Ball Valve, Butterfly Valve, Check Valve, Gate Valve, Globe Valve, Plug Valve, etc in various materials, sizes, standards and types.