1. Purpose: This valve is installed in a variety of pipeline, as the two-way closed-circuit equipment. Widely used in water, sewage treatment, metallurgy and petroleum, construction, chemical, power and other industries.
 2. Features:
 ① reasonable structure, easy maintenance.
 ② well-election materials, high strength cast iron pressure parts, strength and light weight.
 ③ ram plastic packages, corrosion resistance and good sealing.
 ④ advanced surface treatment, the use of sound electrostatic spray coating of epoxy resin, corrosion, no pollution, can be used for drinking water pipes.
 ⑤ tank valve gate-free design, smooth channel, debris will not cause siltation, more suitable for industrial and mining wastewater.