Strainers are amazing components in a piping system that are needed for protecting the equipment from potential damage because of dirt and other particles that may be carried by the process fluid. During the start-up and flushing of the system, strainers may be placed upstream of pumps for protecting them from construction debris which may have been left in the pipe. The figures here denote the typical start-up Strainers. Permanent strainers need to be installed upstream of control valves, traps, and instruments for protecting them from corrosion products which can get dislodged and can get carried throughout the piping system. Reciprocating and centrifugal pumps that handle the material, contain solids that need permanent strainers that are provided in the suction lines of the pump or in the vessel form in which the pump takes suction. The free area of such strainers may not be less than three times the cross-sectional area of the suction line.
Basket Strainers can be defined as a closed vessel with a cleanable screen element that is designed for removing and retaining foreign particles down to a 0.001-inch diameter from several flowing fluids. Strainers not just remove dirt but also takes out the materials which are not needed in the fluid and this can be a valuable product that may be saved. Basket strainers are designed for installation in horizontal lines. They are used commonly for liquid supply applications. Basket Strainers are used in cases where high flow capacity is needed. The basket strainers are maintained removing the cover that yields access to the basket. Basket Strainers are also available in a duplex style that comprises two parallel basket Strainers and diverting valves that permits diversion of the flow via one of the Strainer elements while the other element is being serviced as an essential feature where the flow cannot be interrupted.