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| Auto Strainer |
STRAINER FILTER
A filter is any device that separates solids from liquids or gases by passing the fluid suspension through a barrier (the filter medium), which removes all particles above a certain size and allows the fluid and any smaller particles to pass through the medium.
strainer is defined by its purpose—to remove unwanted large particles from a liquid suspension, usually to protect some sort of downstream equipment, such as a pump or a more delicate filter, from the damage that these rogue particles might cause.
strainers normally present low resistance to liquid flow. The pressure drop across most strainers is relatively small compared with the pressure drop across thick media filters or membrane filters.
Another difference is the function. A strainer is used to protect other downstream equipment (e.g., pumps, instrumentation) from damage by rogue junk. A filter is employed to separate particles from the fluid.
Most strainers, whose function is to protect downstream equipment, are indeed mounted at the pump inlet. Their location is where that protective function is most effectively achieved, and where the pressure drop across the strainer will have least impact on the whole system, and where the strainer can easily be accessed for cleaning.
And some filters operate under vacuum (behind the filter) rather than high pressure in front of the filter.
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| strainer filter |
