Valve rods have single, double, manual, pneumatic, electro-hydraulic, manual valve single bars, double bars electric hydraulic valve. Uses: single rod valve, double-rod valve is based on building materials, mining, metallurgy and other industries for small and medium solid bulk material transport control, and other materials to the required process and developed a new gate for ≤50mm material control. Features: LB bars valve structure is simple, easy to operate, no jamming, to overcome the disadvantages of flat gate because the material particles caused by the opening and closing large force, and even do not go off. As the valve uses a single operating rod, so easy to operate, flexible, high-quality steel welding overall structure, rigid, unchanging, long service life, no maintenance, small and medium crystalline, ideal for bulk materials control.