DM-0003_Angle Line Strainer IOM_Rev 2.0

Figure 1: Standard and Reverse Flow Diagrams

Installation & Operation Angle-Line Strainers can be designed for standard flow into the end of the strainer or can be designed for reverse flow into the side-inlet and out the end (See Figure 1). If you want to switch flow directions of the strainer, the same strainer body and element can be used with different frame and intervals – see the latest catalog for information. Strainer assemblies are designed to allow particles to be collected on the outside of the strainer element. Correct flow direction is indicated by the arrow on the side of the housing. Install strainer for ease of access and element removal. Use adequate piping supports to avoid over- stressing strainer fittings. Add isolation valves downstream and/or upstream of the strainer to allow opening and manual cleaning of the element without draining the entire line. As the Angle-Line strainer becomes plugged with debris, differential pressure across the strainer increases. Monitor pressure drop during system operation using pressure gauges or sensors installed on both sides of the strainer. Maximum allowable soiled strainer pressure drops, and approximate clean pressure drops for each strainer at their maximum flow rate size are listed in Tables 1 and 2. The latest version of the catalog also published Cv values, which can be used to calculate pressure drop at other flowrates. A soiled strainer may completely block flow resulting in a strainer differential pressure equal to the dead-head pressure of the system pump, which could lead to damaged strainer components. To clear a plugged strainer, refer to the cleaning section.

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