The Titan DS design duplex basket strainer uses a cleverly designed flanged diverting valve to divert flow from one strainer basket chamber to the other. This design provides a bubble tight seal, similar to the Eaton model 53BTX, however it is much easier to rebuild due to this flanged body design.
Unlike Eaton and Keckley, Titan offers their ball valve style duplex basket strainer in a 300# pressure class design to handle non-shock pressures of over 700 PSI in both carbon steel and 316SS materials. The only alternative for 300# class duplex strainers by Eaton and Keckley are custom fabricated designs which generally cost more, have longer lead times and are physically larger.
Navigate to the desired material of construction and each pricing table has links to the strainers customizable datasheet and outline drawing.