Key points of swimming pool filter sand tank maintenance knowledge!

The common faults and maintenance methods of the swimming pool filter sand tank are as follows: No. Phenomenon Cause Solution 1. The newly installed filter has a small flow rate and the quartz sand is too dirty. Bad or damaged Adjust or replace the sealing ring 3 Water leakage at the connection between the control valve and the filter 4 Water leakage between the control valve cover and the main body 5 Water leakage of the drainage and sand discharge valve 6 Water leakage of the inlet, outlet, and sewage outlet 7 Small flow after backwashing Quartz sand plate Clean or replace the quartz sand. 8. There is quartz sand accumulation at the water outlet of the swimming pool. The slit filter tube is damaged. Replace the slit filter tube. 9. When the newly installed sand tank is filtered, the quartz sand at the sewage outlet is too full, and the sand remains on the sealing surface during backwashing. Rinse for 10 minutes or extend the time for 10 minutes depending on the situation. When filtering, the reversing seal ring at the outlet of the sewage outlet is damaged. Replace the control valve. Clean the connection nozzle and observation window of the pressure gauge once, and check the working condition of the exhaust valve; 2. Check the accuracy of the readings of the pressure gauge and flowmeter every three months, and correct them; 3. Open the valve every year. Hole once, check the corrosion of the contact surface between the filter medium and the filter and the quality of the sand layer, and add new filter material to the design height; 4. As the normal filtration time increases, the filter cake will gradually thicken, and the filtration resistance will gradually increase. Increase. The intuitive performance is that the pressure gauge reading of the filter increases. When the pressure increases to 30% of the normal pressure (for example, the normal pressure is 1.0kg/cm²; when the pressure reaches 1.3kg/cm².), it is necessary to clean the filter .

Push the handle on the cylinder head controller to flush backwards, the water flow enters from the filter main pipe, and is discharged through the filter pipe at the bottom of the cylinder. The water flow rises from the bottom to discharge the dirt in the sand layer, and then push the controller to clean The dirt in the pipe is discharged from the sand tank. After about half a minute to 1 minute, push the handle to resume normal filtration. (Note: When changing the control position of the valve or cylinder head, the power of the water pump must be turned off first.

) 5. In the following situations, it is recommended to backwash the sand tank: ①The reading of the pressure gauge on the sand filter tank of the swimming pool is 50kPa or more higher than the initial reading after the last backwash, and backwashing is required immediately. ② The continuous operation time reaches 5 days. ③The swimming pool is scheduled to be closed for more than 5 days.

When backwashing, you need to pay attention to the following: ①The time for backwashing is generally selected after each session or after the opening of the day, and cannot be carried out during the opening period. ②When there are multiple filters in the swimming pool, they should be carried out one by one, and two or more filters should not be backwashed at the same time. ③Backwashing must control the speed and time of backwashing. The backwashing time is 5 to 6 minutes or observe the backwashed water until there is no suspended matter in it.

When the system pressure still cannot be effectively reduced after backwashing, it means that the quartz sand has hardened. Open the sand tank, mechanically stir the filter material layer, and soak for 4 hours with a weakly alkaline sodium bicarbonate (sodium carbonate) saturated solution , and then blowdown, backwash, if the effect is still not good, you need to replace the filter material. In the process of replacing the quartz sand, care should be taken to protect the filter tube to prevent damage and sand run-off. After replacing the quartz sand, the follow-up operation is the same as a newly installed sand tank.

If the equipment will not be used for an extended period of time, please leave the sand tank empty. 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..