Zhejiang Demelong Fluid Technology Co., Ltd  

Plug Valve, Valve, Sleeve Type Soft Sealing Plug Valve, Double Block & Bleed Plug Valve, Elastic Seat Eccentric Plug Valve, Lifting Type Metal Seated Plug Valve, Inverted Pressure Balance Lubricated Plug Valve, Jacket Plug Valve, 3-Way Plug Valve