Lenntech
Fact Sheet
info@lenntech.com Tel. +31-152-610-900
www.lenntech.com Fax. +31-152-616-289
PRO RO HR LE Series
High Rejection Low Energy Brackish Water RO Elements
The PRO RO HR LE series membrane elements are
the solution for a broad range of water purification
that offer a choice of high rejection and high flow
products, when low energy consumption is a requirement. They all use a proprietary polyamide thin
film membrane that offers a high salt rejection with
operating pressures as low as 90psi. These elements are recommended for low brackish water
with salt concentration (TDS) levels up to 1,000mg/l.
In turn, PRO RO HR LE elements produce a permeate quality close to a standard brackish membrane
element at a much lower pressure.
PRO RO HR LE elements feature a FRP outer wrap
and female end connections.
Table 2: Dimensions and Weight
Dimensions, inches (cm)
Model
PRO-RO-HR-LE-WT1
1This
Table 1: Element Specification
Membrane
Figure 1: Element Dimensions Diagram
Boxed
A
B2
C
Weight
lbs (kg)
40.0
(101.6)
1.125
(2.86)
7.9
(20.1)
35
(16)
product ships wet.
diameter unless specified OD (outside diameter).
2Internal
Thin-film membrane (TFM*)
Table 3: Operating and CIP parameters
Model
Flow average
gpd (m3/day)
Salt rejection average
(NaCl)1,2
Salt rejection
minimum
(NaCl)1,2
PRO-RO-400-HR-LE-WT
10,200 (38.6)
99.5%
99.0%
PRO-RO-430-HR-LE-WT
11,000 (41.6)
99.5%
99.0%
1 Average salt rejection after 24 hours operation. Individual flow rate may vary
+25%/-15%.
2 Testing conditions: 500ppm NaCl solution at 115psig (862kPa) operating pressure, 77°F, pH7.5 and 15% recovery.
Model
Active Area
ft2 (m2)
Outer wrap
Part
Number
PRO-RO-400-HR-LE-WT
400 (37.2)
Fiberglass
3021566
PRO-RO-430-HR-LE-WT
430 (39.9)
Fiberglass
3021567
Typical Operating Pressure
120 psig (830 kPa)
Typical Operating Flux
10-20GFD (15-35LMH)
Maximum Pressure
400 psig (2,758 kPa)
Maximum Temperature
Operating: 122°F (50°C)
Cleaning: 122°F (50°C)
Recommended pH
Optimum rejection pH: 7.0-7.5,
Operating Range pH: 4.0-11.0,
Cleaning Range pH: 2.0-11.5
Recommended Pressure Drop
Over an element: 12 psig (83 kPa)
Per housing: 50 psig (345 kPa)
Chlorine Tolerance
1,000+ ppm-hours,
dechlorination recommended
Feedwater
NTU < 1
SDI < 5