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Home Parts Membranes Selection GuideRO Membrane Selection Guide

RO Membrane Selection Guide

RO membrane can effectively remove suspended solids, colloids, bacteria, virus, soluble salts and other impurities from water and is widely used in chemical, pharmaceutical, food & beverage and water treatment fields. We list and analyze RO membranes from specification, performance and characteristic aspects to help you choose the right RO membrane quickly.

Specification

Industrial Seawater Desalination Membrane Model Coding Rules
Let's take SM SW-8040-365HRFR/34 as an example.

Brand	Membrane Series	Membrane Diameter	Membrane Length	Active Area	Feature	Feed Spacer
Snowate Membranes	SW: Seawater Desalination	80: 8.0"	40: 40"	440: 440 ft²	HR: High Rejection	28: 28 mil
–	–	40: 4.0"	–	400: 400 ft²	XHR: Extra High Rejection	34: 34 mil
–	–	–	–	365: 365 ft²	HRLE: High Rejection & Low Energy	–
–	–	–	–	82: 82 ft²	HRFR: High Rejection & Fouling Resistance	–
–	–	–	–		XLE: Extra Low Energy	–

Commercial Seawater Desalination Membrane Model Coding Rules
Let's take SM SW-2521-28HR as an example.

Brand	Membrane Series	Membrane Diameter	Membrane Length	Active Area	Feature
Snowate Membranes	SW: Seawater Desalination	40: 4.0"	40: 40"	33: 33 ft²	HR: High Rejection
–	–	25: 2.5"	21: 21"	28: 28 ft²	HRLE: High Rejection & Low Energy
–	–	–	–	12: 12 ft²	–

Industrial Brackish Membrane Model Coding Rules
Let's take SM BW-8040-400FR/34 as an example.

Brand	Membrane Series	Membrane Diameter	Membrane Length	Active Area	Feature	Feed Spacer
Snowate Membranes	BW: Brackish	80: 8"	40: 40"	440: 440 ft²	HR: High Rejection	28: 28 mil
–	–	40: 4"	–	400: 400 ft²	FR: Fouling Resistance	34: 34 mil
–	–	–	–	82: 82 ft²	XFR: Extra Fouling Resistance	–
–	–	–	–	–	HRLE: High Rejection & Low Energy	–
–	–	–	–	–	FRLE: Fouling Resistance & Low Energy	–
–	–	–	–	–	XLE: Extra Low Energy	–

Ordinary brackish water RO membrane Model Coding Rules
Let's take SM ULP-8040-400 as an example.

Brand	Membrane Series	Membrane Diameter	Membrane Length	Active Area
Snowate Membranes	LP: Low Pressure	80: 8.0"	40: 40"	440: 440 ft²
–	ULP: Ultra Low Pressure	40: 4.0"	21: 21"	400: 400 ft²
–	XLP: Extra Low Pressure	25: 2.5"	–	82: 82 ft²

Performance

The relationship between productivity and salt rejection of different RO membrane series

The relationship between productivity and salt rejection of main RO membrane series

Relationship between pressure and salt rejection rate of main reverse osmosis membrane.

The relationship between pressure and salt rejection of main RO membrane series

Characteristics

Water Sources

Water Source	RO Membrane Series	Features
Seawater	Industrial Seawater Desalination Series	High desalination, ultra-high desalination, high desalination low energy consumption, high desalination anti-pollution, ultra-low energy consumption
Seawater	Commercial Seawater Desalination Series	High desalination rate, high desalination rate with low energy consumption
Brackish	Industrial Brackish Series	Ultra-high desalination, anti-pollution, super anti-pollution, high desalination low energy consumption, anti-pollution low energy consumption, ultra-low energy consumption
Surface Water & Underground water	Ordinary Brackish Series	Low energy, ultra-low energy, extremely low voltage

Feed Water Requirements

Water Source		RO Permeate	Underground Water		Surface Water		Seawater			Industrial wastewater / municipal sewage
Pretreatment Method		RO	Non-Pollution	High Pollution	Traditional	MF/UF	Underground	Surface traditional	Surface MF/UF	traditional	MF/UF
Inlet SDI	Conservative Value	<1	<3	<3	<5	<2.5	<3.0	<4	<2.5	<4	<2.5
Inlet NTU	Normal Value	<0.1	<0.1	<0.1	<0.2	<0.1	<0.1	<0.1	<0.1	<0.2	<0.1
System Average Water Flux GFD/LMH	Conservative Value	18/31	14/24	11/19	10/17	14/24	8/14	7/12	8/14	7/12	8/14
	Normal Value	21/36	16/27	13/22	12/20	16/27	10/17	8/14	10/17	10/17	12/20
	Aggressive Value Value	25/43	20/34	15/26	14/24	18/31	12/20	10/17	12/20	12/20	14/24

Maximum& Minimum Feed Flows

Water Source

RO Permeate

Underground Water

Surface Water

Seawater

Industrial wastewater / municipal sewage

Maximum water flow rate of each pressure vessel
(GPM/m³/h)

4"

Normal Value

16/3.6

8"

Conservative Value

75/17

65/15

75/17

65/15

60/14

75/17

60/14

75/17

Normal Value

75/17

Minimum concentrated water flow rate of each pressure vessel
(GPM/m³/h)

4"

Normal Value

2/0.45

3/0.68

4/0.80

3/0.68

8"

Normal Value

6/1.4

12/2.7

14/3.2

12/2.7

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