... small fluid resistance, labor-saving operation, and unconstrained flow direction. 3. The wheel is made of HT200 gray ... air. Specialized in development and production of Copper Valves, Gas Valves, Gate Valves, Ball Valve, Radiator Valve, Stop Valve, Check ... Valves, Sanitary Wares, Hose, Water meters and Various Pipe Fittings etc., the company is devoted provide high-quality professional services to all ...