... type Manual, worm worm gear drive, gas drive, electric drive. Part name Material Body Cast iron, nodular cast iron, cast steel ... Disc Ball mill cast iron, stainless steel and special materials seal ring all kinds of rubber Characteristics of Product: 1.Small in ... on-off operation. 3.Disc has two-way bearing, perfect seal, without leakage under the pressure test. 4.Flow curve tending ...