Dry chemical feed equipment and control is typically used for water treatment purposes. It involves the use of a chemical feeder to add dry chemicals, such as chlorine or other disinfectants, coagulants, or flocculants, into a water treatment process to help remove impurities and improve water quality.

The dry chemical feeder typically consists of a hopper that holds the dry chemical, a metering mechanism to control the amount of chemical added to the water, and a control system that regulates the rate of chemical feed based on the water flow rate or other parameters.

Dry chemical feed equipment and control is commonly used in industrial and municipal water treatment systems, as well as in commercial and residential swimming pool and spa systems. The use of dry chemicals can be more efficient and cost-effective than liquid chemicals, as they are easier to handle, transport, and store, and can be more easily controlled to achieve the desired water quality.