Operations and Maintenance Manual
E4H Series Water Purification Machine
13
1.5 Specifications for E-Series Machines
The machine flow specifications listed in Table 1.1 below are based on 77°F (25°C) and 2,000 ppm
NaCl.
Table 1. 1: Flow Specifications for E4H Machines, 50-75%
R
e
c
o
v
e
r
y
M
od
e
l
E
4
H-
16
K
E
4
H-
21
K
E
4
H-
27
K
E
4
H-
38
K
E
4
H-
43
K
U
nit
s
gpm (m
3
/h) gpm (m
3
/h) gpm (m
3
/h) gpm (m
3
/h) gpm (m
3
/h)
Pe
meate
R
a
t
e
11.2 (2.56) 15 (3.4)
18.8 (4.3)
26.2 (5.9) 30 (6.8)
C
once
nt
r
a
t
e
R
a
t
e
11.2-3.7
(2.5-0.8)
15-5
(3.4-1.1)
18.8-6.3
(4.3-1.4)
26.2-8.7
(5.9-2.0)
30-10
(6.8-2.3)
Feed
R
a
t
e
22.4-14.9
(5.1-3.4)
30-20
(6.8-4.5)
37.6-25.1
(8.5-5.7)
52.4-34.9
(11.9-7.9)
60-40
(13.6-9.1)
1.5.1 Feed Water Specifications
The feed water requirements stated in the following table must be met to ensure quality
permeate and extended membrane element life.
Table 1. 2: Feed Water Requirements
Te
m
p
e
r
a
t
u
r
e
Typical: 50-85°F (10-29°C)
Maximum: 32-104°F (0-40°C)
Inlet
Pr
e
ssu
r
e
Minimum 30 psig (2.1 bar)
Maximum 60 psig (4.1 bar)
Chlorine (continuous
f
ee
d
)
0 ppm
Operating
p
H
For soft water (less than 1 grain per gallon (gpg) or 17 mg/L hardness),
acceptable pH is 4.0-11.0.
For unsoftened water contact factory with water analysis, acceptable pH
is 5.5-6.0.
For short term (cleaning) a pH range of 2-12 is acceptable.
Silt Density Index
(
S
D
I
)
Less than or equal to 3 to minimize membrane fouling and extend cleaning
intervals. Refer to ASTM standard D4189.
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