XLE (Extremely low energy) series is an extremely low-pressure aromatic polyamide composite membrane element developed by Zhejiang E-MEM New Material Technology Co., Ltd for surface water and ground water desalination, which can achieve the same high-water flux and high desalination rate as the conventional low-pressure film under the condition of very Low operating Pressure. Its operating pressure is about 1/2 of the operating pressure of conventional low-pressure composite membrane, so as to reduce the investment cost of related pumps, pipelines, containers and other equipment and the operating cost of reverse osmosis system, and improve economic benefits. XLP series membrane elements are suitable for the treatment of low-salt water sources with not high requirements for desalination rate, such as surface water, ground water, tap water and municipal water with salt content less than 1000ppm. Mainly used in various scale of pure water, boiler feed water, food processing and other fields.

Performance parameters of membrane element

E-MEM®（XLE） series membrane performance

Model		Permeate flow GPD （m3/d）	Salt rejection（%）	Active membrane area ft2(m2)	Testing pressure Psi (MPa)	Testing condition
XLE-4040		2400(9.1)	99.0	90.4(8.4)	110(0.76)	500ppm NaCl
XLE-400		10315(39.0)	99.2	400(37.0)	110(0.76)	500ppm NaCl
XLE-440		11347(42.9)	99.2	440(40.7)	110(0.76)	500ppm NaCl
other testing condition	Temperature （℃）	25.0±1.0
	Feed pH	7.5±0.5
	Recovery （%）	15.0±1.0
Available		Dry & Wet

Specification and size

（a）

（b）

Membrane element model	A(±2.0mm)	B(±1.0mm)	C(±0.1mm)	D(±0.1mm)	Schematic diagram
XLE-4040	1016	100	19.1 (outer diameter)	26.7	(a)
XLE-400	1016	200	28.6	---	(b)
XLE-440	1016	200	28.6	---	(b)

Ultimate service conditions

Max.operating pressure--------------------------600psi（4.14MPa)

Max.feed water temperature ---------------------45℃

Max. feed water flow------------------------------ 75gpm（17m3/h）（XLE-8040）

16gpm（3.6 m3/h）（XLE-4040）

Max.feed SDI15--------------------------------------5

Feed free chlorine concentration ------------- ＜0.1ppm

pH range, continuous running -------------- -----3~10

Feed PH range when chemical cleaning ---------- 2~12

Maximum pressure drop(single membrane)- ---- 15 psi（0.1MPa）

matters needing attention

①. The data and information provided by Zhejiang E-MEM New Material Technology Co., Ltdin this sample are all obtained throughlong-term experiments, and we are convinced that these data and information areaccurate and effective. Customers are requested to use the product in strictaccordance with the design, use and maintenance requirements of the product andkeep relevant data records. Hangzhou E-MEM Environmental Technology Co., Ltdshall not bear any consequences arising from customers' failure to use andmaintain the products in accordance with the conditions provided by thissample.

②. The permeate flow listed in the table is theaverage value, and the deviation of single membrane element of permeate flow is±20%.

③. Before products leaving the factory, the drymembrane element has no protective liquid, while the wet membrane element isstored and treated with 1.0% sodium bisulfite (10% glycerin antifreeze added inwinter) solution and vacuum-packed.

④. Dry membrane elements should always be kept wetafter wetting. When wet membrane element is not used for a long time, in orderto prevent the growth of microorganisms, it is recommended to soak the membraneelement with protective liquid containing 1.0% sodium bisulfite (food grade)(prepared with RO production water).

⑤. For initial use of membrane elements, it isrecommended to flush first at low pressure for 15-25 minutes and then at highpressure for 60-90 minutes (water production not less than 50% of the systemdesign). All production and concentrated water shall be discharged within thefirst hour of membrane element operation.

⑥. It is prohibited to add any chemical agentthat has an impact on the membrane element in storage and operation. If suchchemical agent is violated, Hangzhou E-MEM Environmental Technology Co., Ltdwill not bear all the consequences arising therefrom.

Back →