ChemTech

What is valve?            A valve is a device that regulates, directs or controls the flow of a fluid by opening, closing, or partially obstructing various passage ways. Valves function?        a. Stopping and starting fluid flow.      b. Varying the amount of fluid flow.      c. Controlling the direction of fluid flow.      d. Regulating downstream system or process            e. pressure  Relieving component or piping over pressure. Types of valves? •       Globe valve •       Gate valve •       Ball valve •       Needle valve •       Butterfly valve •       Diaphragm valve •       Check valve •       Safety val...

Primary Treatment  Sedimentation: Sedimentation water treatment uses tanks to remove suspended solids from water or wastewater. The process is based on gravity, which causes heavier particles to settle at the bottom of the tank.  Construction ·          Shape : Sedimentation tanks can be rectangular, circular, or inverted pyramid-shaped  ·          Floor : The floor of the tank is often sloped to help collect sludge  ·          Size : The size of the tank depends on the amount of water being treated  ·          Mechanical parts : Some tanks use mechanical parts to move sludge  Working  1.       Water with suspended solids enters the tank 2.       The water slows down and the solids settle at the bottom 3.  ...