There are three types of temporary straineres, cone, truncated cone, and flat. They are normally used during the initial startup of a new application such as a pump.
It is inserted between two flanges in the pipeline up stream of the equipment to be protected. After startup and the debris has been collected by the strainer, it is usually removed. There is little pressure drop when the screen is clean since it is in a straight flow with the pipe. The bottom of the screen cone is to be down stream.
