Watts PWR4022 - Manual (Page 2)

2
I. Introduction
The separation of dissolved solids and water using RO membranes
is a pressure driven temperature dependent process. The membrane
material is designed to be as permeable to water as possible while
maintaining the ability to reject dissolved solids.
The main system design parameters require the following:
• Internal flows across the membrane surface must be high enough
to prevent settling of fine suspended solids on the membrane
surface.
• The concentration of each dissolved ionic species must not exceed
the limits of solubility anywhere in the system.
• Pre-treatment must be sufficient to eliminate chemicals that would
attack the membrane materials.
A. Specifications
RO Membrane
Feed Water Product Water
Reject Water
B. RO Overview
Reverse osmosis systems utilize semipermeable membrane ele-
ments to separate the feed water into two streams. The pressurized
feed water is separated into purified (product) water and concentrate
(reject) water. The impurities contained in the feed water are carried
to drain by the reject water.
PWR40223083 PWR40223103 PWR40223123
Maximum Productivity (gallons per day / gallons per minute)
Maximum production based on standard membranes and feed water of 25°C, SDI < 3, 1000
ppm TDS, and pH 8. Individual membrane productivity may vary (± 15%). May be operated on
other feed waters with reduced capacity.
14,400 / 10 18,000 / 12.5 21,600 / 15
Quality (typical membrane percent rejection) Based on membrane
manufactures specifications, overall system percent rejection may be less.
98 % 98 % 98 %
Recovery (without reject recirculation)
Recovery (with reject recirculation, depending on feed water)
59 %
75 %
59 %
75 %
59 %
75 %
Membrane Size 4 x 40 4 x 40 4 x 40
Number Of Membranes Per Vessel 2 2 2
Pressure Vessel Array 2:1:1 2:2:1 3:2:1
Number Of Membranes 8 10 12
Prefilter (system ships with one 5 micron cartridge) 20" BB 20" BB 20" BB
Feed Water Connection 1 1 ⁄
2
" NPT 1 1 ⁄
2
" NPT 1 1 ⁄
2
" NPT
Product Water Connection 1" NPT 1" NPT 1" NPT
Reject Water Connection 3 ⁄
4
" NPT 3 ⁄
4
" NPT 3 ⁄
4
" NPT
Feed Water Required
(feed water required will be less if reject recycle is used)
17 gpm 21 gpm 25 gpm
Feed Water Pressure (minimum) 20psi 20psi 20psi
Drain Required 17 gpm 21 gpm 25 gpm
Electrical Requirement
230 VAC, 3-ph, 60 Hz (other voltages available)
15 amps 15 amps 15 amps
TEFC Motor (horse power) 5 5 5
Dimensions L x W x H (ft.) 8 x 3 x 6 8 x 3 x 6 8 x 3 x 6
Shipping Weight (estimated pounds) 1000 1100 1200