Eaton, Keckley and Titan all offer 150# class cast 316SS duplex basket strainers and Titan also offers a high pressure 300# class design.
The ¾" to 4" size cast 316SS duplex basket strainers by all three manufacturers have a ball valve style flow diverter, so just like moving a ball valve lever, all the operate needs to do is rotate the handle 180°to point to the chamber you want in service. The primary difference between the designs is that both Eaton and Titan have a elastomeric (soft) seat whereas the Keckley design has a metal-to-metal seat. While there's always an expectation of some leakage into the isolated basket chamber, it might be that the Keckley design has a slightly higher leakage rate. Both Keckley and Titan offer the ball valve style diverter design for the 6" and 8" sizes as well.
Eaton offers a tapered plug valve style diverter for their 6" and 8" sizes; its their Model 50 Duplex Basket Strainer. It operates similar to the ball valve diverter style, however there's an additional step, lifting the valve off its seat with a screw jack. Once the flow is diverted the plug valve needs to be reseated with the screw jack. The Model 50 is another metal-to-metal sealing design which might be advantageous for some aggressive fluids.
Only Keckley offers cast 316SS duplex basket strainers for 10" to 20" size pipelines. Keckley Model SSDPXF cast 316SS duplex strainers use a sliding valve design. A pair of valve discs attached to a screw shaft slide from isolating one chamber to another when a geared operated is rotated. Their design uses (2) baskets per chamber to reduce the size and weight of the baskets removed, perhaps eliminating the requirement for an overhead hoist.
You can use the differential pressure calculator below for all three brands, although there is no 24" size cast 316SS duplex basket strainer. 24"+ size 316SS duplex strainers would need to be custom fabricated. Calculate the approximate clean differential pressure drop by selecting the strainer connection size, inputting your flow rate (GPM), inputting the specific gravity if other than water (sg of water = 1) and select the viscosity range if other than water (SSU of water = 30). Click "Update" to refresh the data and be sure that the clean differential is ≤2 PSI for the intended basket retention.
Since the performance is very similar for all three manufacturers, we can provide a proposal comparing the cost and lead time for each one; we can also suggest the most appropriate design once we know more about your application. The most efficient way for us to assist you is to submit your design criteria with our Duplex Basket Strainer inquiry form, this way we can make the necessary calculations, check materials of construction and provide an itemized quotation. Our response time is ranges from minutes to a couple of hours. If you are in a real rush or just want to chat you can always call us. The table below contains links to comprehensive PDF files for each model.
|BRAND||MODEL||CATALOG PAGES WITH DRAWINGS|
|TITAN||DS MODELS 596/696/796/896||Model DS 596/696/796/896|