Watts R4X40, Installation And Operation Manual

Page: 5 / 18

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
Notes:

Maximum production based on a feed water of 77°F, SDI < 1, 1000 ppm TDS, and pH 7.
Individual membrane productivity may vary (± 15%). May be operated on other feed waters with reduced
capacity.

Percent Rejection is based on membrane manufactures specifications; overall system percent rejection may
be less.
R4X40-1 R4X40-2 R4X40-3
Maximum Productivity (gallons per day) 2200 4400 6600
Quality (average membrane rejection) 98 %
Recovery (user adjustable) 15 - 75 % 25 – 75% 32 - 75 %
Membrane Size
4” x 40”
Number Of Membranes 1 2 3
Prefilter (system ships with one 5 micron cartridge)
20”
Feed Water Connection 3/4" NPTF
Product Water Connection (tubing OD) 5/8"
Reject Water Connection (tubing OD) 5/8"
Feed Water Required (maximum) 10 gpm 12 gpm 14 gpm
Feed Water Pressure (minimum) 10 psi
Drain Required (maximum) 10 gpm 12 gpm 14 gpm
Electrical Requirement (60 Hz) 120 V - 15 amps 120 V - 20 amps 240 V - 12 amps
Motor Horse Power 3/4 1 1 1/2
Dimensions W x D x H (approximate inches) 20 x 20 x 50 20 x 26 x 50
Shipping Weight (estimated pounds) 120 150 180