Cast Iron Duplex Basket Strainers

Continuous Flow Strainers for ¾" to 24" Pipelines

Which Duplex Strainer Design is the “Best”?

Our cast iron duplex strainers cover ¾" to 24" pipelines. All standard flanged connections are ANSI Class 125#. Some Eaton models are also available in 150# class ductile iron. The flow-diverting method changes with strainer size.

 

Flow Diverter Styles by Size

¾"–4" (Eaton, Keckley & Titan) — Ball-valve style diverter. Simply rotate the lever 180° to isolate a chamber. Eaton and Titan use a soft elastomeric seat for better sealing; Keckley uses a metal-to-metal seat. Keckley and Titan also offer the ball-valve design in 6" and 8" sizes.

 

5"–8" Eaton (Model 50) — Tapered plug valve. Requires an extra step: lift the plug off its seat with a jack screw, divert the flow, then reseat. The metal-to-metal seal can be advantageous with aggressive fluids.

 

Larger sizes use either linked butterfly valves or sliding-disc designs. Eaton and Keckley offer sliding-disc styles (Eaton 8"–24", Keckley 10"–20"). A geared operator slides linked valves to isolate one chamber.

 

Eaton Model 52 (10"–18") uses four linked butterfly valves operated by a common gear operator. These are generally less expensive than the sliding-disc designs.

The calculator is valid for Eaton, Titan and Keckley. For larger sizes that offer multiple diverter styles (especially 8"), contact us so we can compare options if clean differential pressure or maximum flow capacity is critical. Target a clean differential of ≤ 2 PSI.

 

Not sure whether a duplex is the right choice? See our article Differences Between Simplex and Duplex Style Strainers.

Brand	Model	Catalog Pages with Drawings
Keckley	DPX	Style DPX
Titan	DS 595 / 695	Model DS 595/695
Eaton	53BTX	Model 53BTX
	50	Model 50
	52	Model 52
	570	Model 570