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Technical Reference - Duplex Strainers
For Applications Where Pipelines Cannot Be Shut Down for Basket Cleaning
A duplex, or double basket strainer can operate continuously and never has to be shut down for cleaning. This type of basket strainer has two separate strainer basket chambers, not just one like a simplex strainer. These chambers are put into service independently. When one basket chamber becomes full, the flow is switched to the other one. The strainer basket is then removed from the out-of -service chamber, cleaned and replaced, ready for use again.
For over 75 years, hundreds of thousands of our Duplex Strainers have been installed all over the world to remove unwanted material from every conceivable kind of industrial fluid.
Examples of where duplex strainers are used: in continuously running lubrication systems where the flow of oil cannot be stopped, cooling lines in places like power plants where the cooling water must always run, industrial heating and power systems where the fuel lines must never be stopped. Many chemical operations must run continuously and a duplex strainer in the line provides assurance that auxiliary equipment will not plug and stop functioning.
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The most important design component of a duplex strainer is the method by which flow is diverted between the two strainer basket chambers. We offer several cost efficient and reliable designs depending on the physical size of the strainer. Smaller sizes, up to 4", utilize a patented diverter cartridge to switch the flow from one chamber to another. This cartridge completely shuts off the flow to the out-of-service chamber - making it easy to service the basket. Our duplex strainers in 5", 6", and 8" sizes use a tapered plug to switch the flow. This simple, time-tested design has few parts and requires little maintenance. For larger size duplex strainers, we have two different designs. Duplex strainers in sizes 10" to 18" have a butterfly valve flow diverter assembly which results in a very compact unit for strainers of this size. Strainers up to 36" in size have a special hand-wheel-operated sliding gate mechanism and a multi-basket design. No matter what the design, our Duplex Basket Strainers have been engineered to perform to specification year in and year out, in the most demanding industrial and commercial applications. If your application is unique and one of our standard duplex strainers won't work, contact us. We can work with you to custom design and fabricated one that will. Over the past 75 years we have engineered duplex basket strainers for just about every conceivable application....why look anywhere else? | ||||
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Model DC ball-type strainer, in sizes from 3/4" to 4", uses a dynamic ball sealing system which keeps the out-of-service strainer basket chamber from filling with fluid while the basket is being changed. A unique diverter cartridge is easy to remove for service. Recommended for flow rates of 6 - 247 GPM | ||||
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The Model TC duplex strainer is for 5", 6" and 8" pipelines where the process cannot be shut down for basket changeout. A tapered plug is used to divert flow from one basket to the other. Recommended for flow rates of 245 - 1,273 GPM | ||||
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Duplex all-plastic basket strainers are ideal for service where corrosion or contamination of the process fluid could be a problem. Plus... these strainers do not have to be painted or coated to survive a difficult environment. Available in sizes up to 4". Recommended for flow rates of 4 - 400 GPM | ||||
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For higher flow rates that require a duplex strainer, the
large-size Model TC switches flow between baskets with a built-in butterfly valve. This design is also compact and can be important when space is at a premium. Available in 70" fo 18" sizes. | ||||
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For handling very large volumes of water, and for quick and easy basket changeout, the Model GC includes 4 baskets per chamber, Flow is switched by a sliding gate mechanism operated by a hand wheel.
Available in sizes from 8" to 36". Recommended for flow rates greater than 1,273 GPM | ||||
Have additional questions about your application? Fill-out our Strainer Specification Assistance Form and we'll respond to you by the next business day. | |||||
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FACTORY DIRECT PIPELINE PRODUCTS, INC. Your Single Source for Industrial Filtration and Valve Products Copyright 2001-2007 |
phone: | 908.496.9020 |
| fax: | 908.496.8080 | ||
| email: | inquiry@industrial-strainers.com |
