Watts PWR4021 - Manual

For Commercial Applications
ES-WQ-PWR4021
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Series PWR4021
Series PWR4021
Commercial Reverse Osmosis
Systems
Flow Rates: Up to 10,800 gpd (40,878 lpd)
Watts Pure Water Series PWR4021 reverse osmosis (RO)
systems are commercial grade high-pressure RO units for
the reduction of total dissolved solids from water. They are
designed to supply reverse osmosis quality water with pro-
duction rates ranging from 3,600 to 10,800 gallons per day
(40,878 lpd).These units are designed for floor mount instal-
lations. Reverse osmosis is a process where high-pressure
feed water is fed into a semi-permeable membrane. In the
membrane, pure water is allowed to pass through the mem-
brane material and exit as purified permeate water. Dissolved
mineral salts are not allowed to pass through the membrane
and become a concentrated reject stream that is sent to a
drain. These RO systems use high-pressure/high-rejection
membranes to achieve a minimum average NaCl ionic rejection
of 95 percent.
Watts Pure Water Series PWR4021 RO systems are a well
designed, rugged line of purifiers. This series comes with a pre-
selected assortment of features, including our digital controller,
for monitoring and operation. Stainless steel membrane hous-
ings, inlet and outlet pre-filter pressure gauges, low-pressure
switch with delayed auto restart, inputs for tank level and
pretreatment interlock, conductivity meter, high-conductivity
alarm output, adjustable reject recycle, permeate and reject
water flow meters, reject recycle flow meter, permeate water
check valve, inlet solenoid valve, membrane feed and reject
water pressure gauges, auto flush, and adjustable reject valve
are all standard features. These systems are designed to
feed an atmospheric storage tank for collection of the reverse
osmosis water. Reverse osmosis water has a wide variety of
applications including municipal water treatment, steam boiler
and steam sterilizer make up, laboratory use, spot free rinsing,
ice and beverage water, water for cooking, food processing,
metal plating and finishing, as well as water for humidification.
Reverse osmosis is also the pretreatment of choice for ion
exchange type de-ionization (DI) systems. Using RO water as
make up to a DI system reduces the exhaustion rate of the DI
resin by up to 95 percent saving time, money, and chemicals
associated with DI resin regeneration.
Watts product specifications in U.S. customary units and metric are approximate and are provided for reference only. For precise measurements,
please contact Watts Technical Service. Watts reserves the right to change or modify product design, construction, specifications, or materials with-
out prior notice and without incurring any obligation to make such changes and modifications on Watts products previously or subsequently sold.
Features
• Membrane Auto Flush
• Powder coated carbon steel support frame
• 316L stainless steel 300psi high-pressure membrane
housings
• Pressure gauges for pre-filter inlet/outlet, membrane feed,
and reject water pressure
• Low feed water pressure safety switch
• Digital microprocessor based controller with delayed auto
restart after low-pressure shut down
• Permeate water conductivity meter with high-conductivity
alarm output
• Tank level and pretreatment interlock inputs
• High-pressure/high-rejection membranes with 95% minimum
average salt rejection
• Permeate, reject recycle, and reject water flow meters
• Adjustable reject and reject recycle valves
• Permeate check valve
• Automatic inlet solenoid valve
• 20" high flow pre-filter
Standards
• Pre-filter Housing NSF/ANSI Certified 42
PURE WATER
Note: Do not use with water that is microbiologically unsafe or
of unknown quality without adequate disinfection before or after
the system.