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The pore size of the reverse osmosis membrane is 0.0001 microns (μm) and only the solvent in the aqueous solution - water - can pass through, while its solutes cannot pass through the reverse osmosis membrane.
Specifications and main performance of membrane elements
| Type | Model | Reject (%) | Average Permeate GPD (m3/d) | Working Pressure & Application | Testing Conditions | ||
| Pressure psi (MPa) | Solution Concentr. (PPm) | Recovery Rate (%) | |||||
| Household RO Membrane | UM1812-50 | 99.0 | 50(0.2) | Working under extremely low pressure. Applicable to residential water purifier and water purifying devices in hospital and laboratory water treatment with TDS lower than 500 ppm. | 60 (0.41) | 250 | 15 |
| UM1810-50 | 97.0 | 50(0.2) | |||||
| UM1812-75HR | 99.0 | 75 (0.28) | |||||
| UM1812-75 | 97.0 | 75 (0.28) | |||||
| UM-2012-100HR | 99.0 | 100 (0.38) | |||||
| UM-2012-100 | 97.5 | 100 (0.38) | |||||
| UM-2012-150 | 97.5 | 150(0.57) | |||||
| Special Size RO Membrane | UM-2812-200 | 97.0 | 200(0.76) | working under extremely low pressure. Applicable to automatic water dispenser and residential drinking fountain. | 100 (0.69) | 250 | 20 |
| UM-3012-300 | 97.0 | 300(1.14) | 100 (0.69) | 250 | 20 | ||
| UM-3012-400 | 97.0 | 400(1.51) | 100 (0.69) | 250 | 20 | ||
| UM-3013-400 | 97.0 | 400(1.51) | 100 (0.69) | 250 | 20 | ||
| UM-3012-500 | 97.0 | 500(1.89) | 100 (0.69) | 250 | 20 | ||
| UM-3013-500 | 97.0 | 500(1.89) | 100 (0.69) | 250 | 20 | ||
| UM-3013-600 | 97.0 | 600(2.27) | 100 (0.69) | 250 | 20 | ||
| UM-3013-700 | 97.0 | 700(2.65) | 100 (0.69) | 250 | 20 | ||
Test conditions: Test pressure: 100 psi (0.69Mpa)
Test fluid temperature: 25 °C
Test solution concentration (NaCI): 250ppm
pH value of test solution: 7.5
Single membrane element recovery rate: 20%
What are the dangers of not changing the reverse osmosis membrane for a long time?
1. Proper pre-treatment. Reverse osmosis membrane system equipped with pretreatment devices relative to the raw water quality and flow is not appropriate, or in the system is not equipped with the necessary process devices and process links. Pre-treatment device does not operate properly, i.e. the system's original pre-treatment equipment has a low removal capacity for raw water SDI components, turbidity, colloids, etc., and the pre-treatment effect is not ideal.
2. Uniform selection of inappropriate equipment or incorrect choice of equipment materials (pumps, piping and others).
3. Failure of the chemical injection unit (acid, flocculant/coagulant, scale inhibitor/dispersant, reducing agent and others).
4. Failure to take appropriate protective measures after intermittent operation or system shutdown.
5. unreasonable operation and use of equipment by line managers (recovery rate, water production, concentration, differential pressure, cleaning).
6. Long time accumulation of insoluble sediment in the system.
7. Large changes in water composition or fundamental changes in water source characteristics.
8. Considerable microbiological contamination of the reverse osmosis membrane system has occurred.
If you would like to know more about our RO membranes, please contact us！
The pore size of the reverse osmosis membrane is 0.0001 microns (μm) and only the solvent in the aqueous solution - water - can pass through, while its solutes cannot pass through the reverse osmosis membrane.
Specifications and main performance of membrane elements
| Type | Model | Reject (%) | Average Permeate GPD (m3/d) | Working Pressure & Application | Testing Conditions | ||
| Pressure psi (MPa) | Solution Concentr. (PPm) | Recovery Rate (%) | |||||
| Household RO Membrane | UM1812-50 | 99.0 | 50(0.2) | Working under extremely low pressure. Applicable to residential water purifier and water purifying devices in hospital and laboratory water treatment with TDS lower than 500 ppm. | 60 (0.41) | 250 | 15 |
| UM1810-50 | 97.0 | 50(0.2) | |||||
| UM1812-75HR | 99.0 | 75 (0.28) | |||||
| UM1812-75 | 97.0 | 75 (0.28) | |||||
| UM-2012-100HR | 99.0 | 100 (0.38) | |||||
| UM-2012-100 | 97.5 | 100 (0.38) | |||||
| UM-2012-150 | 97.5 | 150(0.57) | |||||
| Special Size RO Membrane | UM-2812-200 | 97.0 | 200(0.76) | working under extremely low pressure. Applicable to automatic water dispenser and residential drinking fountain. | 100 (0.69) | 250 | 20 |
| UM-3012-300 | 97.0 | 300(1.14) | 100 (0.69) | 250 | 20 | ||
| UM-3012-400 | 97.0 | 400(1.51) | 100 (0.69) | 250 | 20 | ||
| UM-3013-400 | 97.0 | 400(1.51) | 100 (0.69) | 250 | 20 | ||
| UM-3012-500 | 97.0 | 500(1.89) | 100 (0.69) | 250 | 20 | ||
| UM-3013-500 | 97.0 | 500(1.89) | 100 (0.69) | 250 | 20 | ||
| UM-3013-600 | 97.0 | 600(2.27) | 100 (0.69) | 250 | 20 | ||
| UM-3013-700 | 97.0 | 700(2.65) | 100 (0.69) | 250 | 20 | ||
Test conditions: Test pressure: 100 psi (0.69Mpa)
Test fluid temperature: 25 °C
Test solution concentration (NaCI): 250ppm
pH value of test solution: 7.5
Single membrane element recovery rate: 20%
What are the dangers of not changing the reverse osmosis membrane for a long time?
1. Proper pre-treatment. Reverse osmosis membrane system equipped with pretreatment devices relative to the raw water quality and flow is not appropriate, or in the system is not equipped with the necessary process devices and process links. Pre-treatment device does not operate properly, i.e. the system's original pre-treatment equipment has a low removal capacity for raw water SDI components, turbidity, colloids, etc., and the pre-treatment effect is not ideal.
2. Uniform selection of inappropriate equipment or incorrect choice of equipment materials (pumps, piping and others).
3. Failure of the chemical injection unit (acid, flocculant/coagulant, scale inhibitor/dispersant, reducing agent and others).
4. Failure to take appropriate protective measures after intermittent operation or system shutdown.
5. unreasonable operation and use of equipment by line managers (recovery rate, water production, concentration, differential pressure, cleaning).
6. Long time accumulation of insoluble sediment in the system.
7. Large changes in water composition or fundamental changes in water source characteristics.
8. Considerable microbiological contamination of the reverse osmosis membrane system has occurred.
If you would like to know more about our RO membranes, please contact us！
