Strainer
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Strainer in water treatment is a coarse filter tool that functions to filter large solid particles from the water flow before the water enters the next processing stage.
Here's a more complete explanation 👇
Strainer Function
Strainer functions to:
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Filter out large solid impurities such as leaves, twigs, coarse sand, plastic, mud, and fibers. 
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Protect subsequent equipment such as pumps, valves, fine filters, or membranes from becoming clogged or damaged. 
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Maintain the efficiency of the water treatment system, as it prevents pressure drop and mechanical damage to the system. 
Working Principle
Water containing impurities is passed through a sieve (mesh or screen) inside the strainer.
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Solid particles will be retained on the surface of the filter. 
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Clean water will come out to the next process. 
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Strainers need to be cleaned regularly to prevent clogging. 
Types of Strainers
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Basket Strainer 
 Used in large pipes; basket-shaped to collect dirt.
 Suitable for large flow systems and easy to remove for cleaning.
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Y-Strainer 
 Shaped like the letter "Y"; commonly used in high pressure piping systems.
 More compact and often used for industrial water or cooling systems.
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T-Strainer 
 Shaped like the letter "T"; usually used in systems that require easy maintenance and high efficiency.
Application in Water Treatment
Strainers are usually installed at:
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The initial stage (intake), before the water enters the pump. 
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Before fine filters or main treatment units, such as sand filters or membrane systems. 
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In circulation systems, to prevent clogging of components. 
Maintenance
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Strainers must be cleaned regularly to avoid a decrease in water discharge. 
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In automated systems, self-cleaning strainers can be used which wash themselves using backwash pressure. 
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