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The working principle and use of the sand tank filter


The working principle of the sand tank filter: The sand tank filter uses special filter sand to eliminate the tiny dirt in the pool. Filter sand is used as a medium for removing dirt and is packed in the cavity of the filter. When the control knob “FILTER"position, the pool water containing suspended dirt particles is pumped into the filter pipeline, and then guided by the control switch to the water outlet of the filter.

The pool water passes through the filter, and the microscopic dirt is captured and filtered out by the sand bed. The filtered clean water passes through the control switch at the bottom of the filter and returns to the swimming pool through the pipeline. This entire process is continuous and automatic and provides a complete cycle for the pool filter and plumbing system.

After the filter has been used for a period of time, the accumulated dirt will hinder the water flow and weaken it. At this time, the filter must be cleaned. switch the control"BACKWASH"At this time, the water flow becomes the reverse direction flow, and the water flow directly reaches the bottom of the filter cavity, and then recoils up through the sand layer, flushing the previously captured dirt and residue out of the sewage outlet, every time After backwashing, the control switch "RINSE"position, turn on the water pump for 0.5 to 1 minute and then turn it off, then in the "FILTER" position, restart normal filtration.

Precautions for sand tank filter maintenance: Determination of backwash critical point: There is no unified standard to define the pressure of this critical point in Pa, because the flow parameter of the filter sand tank is not exactly one of its parameters. Because it's just a container. It's like the size of the bowl has no direct relationship with how much a person eats (of course, if the flow rate is large enough and the sand filter tank is small enough, it will create greater resistance to the overall water flow, which will increase the energy efficiency of the pump and waste energy).

The main factors that determine the flow rate are the flow rate and pressure of the pump. The water flow rate of the filter sand tank is directly related to the flow rate of the front-end water pump. At the same time, the material of the filter material, the thickness of the sand layer, the thickness of the pipe, etc. can also affect the flow.

Therefore, the determination of the backwash critical point depends entirely on the operator's experience. Either according to the pressure, backwash after reaching a certain pressure, or on this basis, after comparing the cycle of each backwash, backwash can be performed according to the time period. About replacing the filter material: Generally, the quartz sand filter material does not need to be replaced.

Because it basically does not react with the filtered object. However, if the filter sand tank uses activated carbon as the filter material, the activated carbon will be saturated with iodine value after a period of adsorption, and needs to be replaced in time. When performing various operations on the filter sand tank, care should be taken to ensure that the operation is carried out when the water pump is stopped.

Do not press down the handle with too much force, so as not to break the handle. The three pipes (water inlet, water outlet, and sewage) coming out of the filter sand tank should also be supported and fixed by brackets to prevent the weight of the pipe from increasing and falling when the water is flowing, which will cause the angle between the pipe and the joint to change, so that the joint at the joint will Unable to withstand excessive torque and rupture. Poolking is the best swimming pool equipment manufacturer and supplier in China. Poolking exists to provide the highest quality swimming pool equipment while offering competitive pricing..

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