1. The high-pressure pump of the reverse osmosis device may cause the device to fail even if it stops running for a very short time.

2. When the reverse osmosis device is stopped, low-pressure feed water should be used to replace the water in the reverse osmosis device. This is to prevent the precipitation of silica during shutdown (due to the decrease in water temperature in winter).

3. When the differential pressure between the inlet and outlet of the reverse osmosis device exceeds the standard, it indicates that the reverse osmosis membrane surface has been contaminated or the feed water flow rate is above the design value. If the pressure difference problem cannot be solved by flow adjustment, the membrane surface should be cleaned.

4. Excessive feed water flow will cause premature deterioration of the membrane module, so the feed water flow should not exceed the design standard value. In addition, the flow rate of concentrated water should be avoided as much as possible to be less than the design standard value. If the flow rate of concentrated water is too small, uneven flow will occur in the pressure vessel of the reverse osmosis device and dirt will be precipitated on the membrane module due to excessive concentration.

5. Hydrolysis of cellulose acetate membrane can easily cause performance deterioration of the reverse osmosis device. For this reason, the PH value of water must be strictly controlled. The PH value of feed water must be maintained at 5-6, while composite membranes can operate in the feed water PH3-PH11 range.

6. When the amount of sodium hypochlorite injected is insufficient and the free chlorine in the feed water cannot be detected, sludge will occur on the membrane module of the reverse osmosis device, and the pressure difference of the reverse osmosis device will increase. However, for composite membranes and polyamide membranes, the amount of free chlorine entering the membrane module must be strictly controlled, and exceeding the specified value will lead to oxidative decomposition of the membrane.