The direction of the flow of continuous slot water well screens is determined by the position of the surface profiles in relation to the support profiles. flat welded welded Johnson type screens / water well screens/wedge wire screens are either flow-out-to-in (FOTI) or flow-in-to-out (FITO)

Wire Wrapped Water Well Strainer Screens are  made by winding cold-rolled wire,approximately triangular in cross section, around a circular array of the longitudinal rods. The wire is attached to rods by welding, producing rigid one-piece units having high strength characteristics at minimum weights. Advantages of the flat welded Johnson type screens/the water well screens/wedge wire screens are as follows:

1. Better filter function. 
2. Prolong life of well.

3. Long service life. 
4. High pressure-resistant.

5. Customized.