How to install and debug reverse osmosis plant?

The installation of the reverse osmosis unit must be carried out according to the following conditions

  1. The pipelines and valves connecting the device and the water supply pump should be degreased before connecting, and the overflow part of the water supply pump should also be degreased.
  2. The maximum output height of the water production pipe of the device should be less than 8 meters
  3. If the cleaning device and the R/O device are connected by a hard pipe, the liquid inlet and return pipes shall not be directly laid on the ground to avoid damage.
  4. After the device is transported to the site, it should be placed indoors, and the ambient temperature should not be lower than 5°C and the highest should not be higher than 38°C. When the temperature is higher than 35℃, ventilation measures should be strengthened.
  5. After the device arrives, the installation should be completed within one month, and the water test run should be carried out immediately.
  6. Before the device is tested with water, any valve shall not be opened.
  7. After the device is in place, the support points of the device should be adjusted so that the components are in a substantially horizontal position and have reliable contact with the foundation.

Installation of reverse osmosis membrane modules

  1. Check the inside of the pressure vessel for scratches or damage, and the leaking vessel must be replaced. Flush the pressure vessel with clean water to remove all dust and particles, and clean up corrosion products or external impurities (including excess oil). Lubricate the inside of the housing from 1/2 of the ramp to about 1/2″ from the ramp.
  2. Check the surface of the membrane element for defects. If there is any defect, it should be dealt with in time to avoid scratching the container. Pay attention to prevent the film roll from retracting out of the end of the device. If you find any defects that cannot be handled, contact the manufacturer for handling.
  3. Lubricate the inside of the container with about 50% glycerol-water mixture. The mixture can be moistened with a suitable sized cotton cloth.
  4. Install the first membrane element into the water inlet of the pressure vessel, leaving the end of the element a few inches outside the vessel for connecting the next membrane element.
  5. Lubricate the O-ring of the connector with a small amount of lubricant, and connect the connector to the next membrane element. Install the next membrane element.
  6. Connect all external piping.
  7. Disassembly of pressure vessel and membrane element:
  8. The removal process is the reverse of the installation process.


  1. Take out the component from the opposite direction of the water inlet of the component. When taking out the component, it must be pulled out in parallel, and must not be shaken left and right.
  2. The loading element should be loaded from the direction of water inlet, and pushed in with even force, and it is not allowed to knock it in with a hard object.
  3. The disassembled components should be immersed vertically in a 0.5-1% sodium bisulfite solution immediately, and must not be placed in the air dry.

Operation instructions of reverse osmosis unit

Each step of the operation and protective flushing can be carried out automatically, and the time setting and flow rate of each process should be properly adjusted according to the following points.

Water production

The initial set value of the inlet pressure of the high-pressure pump is 0.05Mpa, which should be adjusted appropriately according to the site conditions during operation.

Protective rinse

Set a sufficient time to completely flush out the concentrated water in the outage RO device, and the preset time is 5 minutes.

RO device commissioning steps

  1. Analyze and test the water inlet of the device, and the results show that the water inlet requirements are met, and then the device can be commissioned with water.
  2. Adjust the pressure control system of the high pressure pump.
  3. Check whether the connections between all the pipelines of the device are complete, whether the pressure gauges are complete, whether the low-pressure pipelines are tightly connected, and whether there is a shortage.
  4. Fully open each pressure gauge switch and the main water inlet valve, concentrated water discharge valve, and product water discharge valve.
  5. Start the pretreatment equipment and adjust the water supply to be greater than the total water inflow of the device.
  6. When there is no formaldehyde smell in the effluent, close the main water inlet valve of the device.
  7. Start the high-pressure pump, and slowly open the main water inlet valve of the device, the total water inlet pressure of the control device is less than 0.5Mpa, flush for 5 minutes, and check whether the high and low pressure pipelines and instruments are normal
  8. Adjust the water inlet valve and concentrated water discharge valve to make the water inlet pressure reach 1.0~1.4Mpa.
  9. Detect the conductivity of the product water, open the product water outlet valve and close the product water discharge valve when it meets the requirements.
  10. The debugging of the RO device is all manual single-step operation. After the operation is normal, it can be switched to the automatic state, and the operation is automatically controlled by the online instrument and PLC.

Xi’an CHIWATEC Water Treatment Technology is a high-tech enterprise specialized in various water processing devices. Aside from these individual products, which cover a number of types and series, we can also help with related comprehensive engineering projects. Thanks to our hard work and dedication upon our founding, we are now one of the fastest-developing water treatment equipment manufacturers in Western China.

Further reading:

Commercial Reverse Osmosis Equipment

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