Description
The Eaton Model 50 Duplex Basket Strainer is offered in the 5″ to 8″ sizes and it has a tapered plug valve style diverter. This design also uses a lever to divert the flow, but first the operator must “lift” the valve off the valve seat using a screw jack. The metal-to-metal seating may be advantageous for some applications. Often the diverting plug is provided in cast bronze material, as it is a replaceable component whereas the “valve seat” is the “strainer body” and not practical to “replace”.
Cast steel duplex strainers for larger pipeline sizes are available from all three manufacturers. Eaton’s Model 570 Duplex Strainers and Keckley’s SDPXF Duplex Basket Strainers have a sliding disc style diverter. Rotation of a geared operator slides the discs from one chamber to the other. Eatons design uses (4) strainer baskets per chamber and Keckley’s (2) strainer baskets per chamber. The concept of multiple strainer baskets per chamber is to reduce the size and weight of the strainer basket to enable an operator to remove them without the need for an overhead hoist. The Eaton Model 570 Duplex Basket Strainers are available in 8 to 24″ sizes whereas the Keckley SPDXF Duplex Strainers are offered in the 10″ to 20″ size range
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