Screw flight for water treatment

We're proud to say that we're the foremost and professional manufacturer in China of the helicoid screw flight. We have a production capacity of more than 5000 tons annually. Now we have two types of helicoid flights, one is the Endless Cold Rolled Screw Flight (inner edge is thick and the out edge is thin); the othe type is Sectional Screw Flight (same thickness in both inner edge and outer edge). We're ISO9001 certified enterprise.