The design of cleaning tanks is described by lux and linford and Myers. The principal points of design are as follows:
- To improve agitation of the solution, a sheet metal shield should be installed I front of the steam heating coils to make use of convection currents. In addition, either motor driven propellers or movement of the work should be provided to ensure adequate agitation.
- In order that there may be a quiescent layer of solution at the bottom of the tank to provide for settling of sludge, the bottom of the lowest heating coils should be at least 75 mm from the bottom of the tank.
- An overflow dam should be provided so that oils and greases floating on the surface will be removed each time a load of work causes some of the solution to overflow into the drain. This is necessary to ensure that the cleaned work is removed through a clean surface.
- A mesh grid false bottom is desirable to make it easy to recover parts that drop into the tank.
- A means should be provided to control and either indicate or record the temperature.