Oil & Gas
Land-Based Desalination

ACX3 Series

Industrial Seawater Reverse Osmosis Systems

ACX3-Series Industrial Seawater Reverse Osmosis Systems are engineered for seawater desalination and other high total dissolved solids (TDS) applications requiring high pressure pumps. The ACX3-Series systems are rated to handle total dissolved solids as high as 38,000 ppm (with higher levels of TDS achievable by adjusting the recovery and /or flux rate). 

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Equipment Characteristics
models acx3-8000 acx3-16000 acx3-24000 acx3-32000 acx3-40000 acx3-48000 acx3-64000 acx3-80000 acx3-96000
design
System Capacity* gpd
(m3/day)
8000 (30) 16000 (61) 24000 (91) 32000 (121) 40000 (151) 48000 (182) 64000 (242) 80000 96000 (363)
Configuration* Single Pass Single Pass Single Pass Single Pass Single Pass Single Pass Single Pass Single Pass Single Pass
Feed Water Source** (ppm) TDS < 4,000 TDS < 4,000 TDS < 4,000 TDS < 4,000 TDS < 4,000 TDS < 4,000 TDS < 4,000 TDS < 4,000 TDS < 4,000
Nominal
Recovery Rate
30% 45% 50% 50% 50% 50% 50% 50% 50%
rejection and flow rates
Nominal Salt
Rejection
99.5% 99.5% 99.5% 99.5% 99.5% 99.5% 99.5% 99.5% 99.5%
Permeate Flow* gpm (lpm) 5.6 (21) 11.1 (42) 16.7 (63) 22.2 (84) 27.8 (105) 33.3 (126) 44.4 (168) 55.5 (210) 66.6 (252)
Minimum Concentrate
Flow gpm (lpm)
14 (53) 14 (53) 14 (53) 14 (53) 14 (53) 14 (53) 14 (53) 14 (53) 14 (53)
connections
Feed (in) 2 FNPT 2 FNPT 2 FNPT 2 FNPT 2 FNPT 2 FNPT 2 FNPT 2 FNPT 2 FNPT
Permeate (in) 1.25 FNPT 1.25 FNPT 1.25 FNPT 1.5 FNPT 1.5 FNPT 2 FNPT 2 FNPT 2.5 FNPT 2.5 FNPT
Concentrate (in) 1 1/4 FNPT 1 1/4 FNPT 1 1/4 FNPT 1 1/2 FNPT 1 1/2 FNPT 2 FNPT 2 FNPT 2 FNPT 2 FNPT
Clean-In-Place Port (in) 1 1/2 FNPT 1 1/2 FNPT 1 1/2 FNPT 1 1/2 FNPT 1 1/2 FNPT 2 FNPT 2 FNPT 2 FNPT 2 FNPT
Chemical Feed Port (in) 1/2 NPT 1/2 NPT 1/2 NPT 1/2 NPT 1/2 NPT 1/2 NPT 1/2 NPT 1/2 NPT 1/2 NPT
membranes
Membranes Per Vessel 2 2 2 2 4 4 4 4 4
Membrane Quantity 2 4 6 8 10 12 16 20 24
Membrane Size 8040 8040 8040 8040 8040 8040 8040 8040 8040
vessels
Vessel Array 1 1:1 1:1:1 2:1:1 2:1:1:1 2:1 2:1:1 3:1:1 3:2:1
Vessel Quantity 1 2 3 4 5 3 4 5 6
pumps
Pump Type Plunger Plunger Plunger Plunger Plunger Plunger Plunger Plunger Plunger
Motor HP (KW) 20 (15) 20 (15) 25 (19) 40 (30) 40 (30) 50 (37) 75 (56) 100 (75) 100 (75)
electrical
Standard Voltage*** 460V, 60Hz, 3Ph 460V, 60Hz, 3Ph 460V, 60Hz, 3Ph 460V, 60Hz, 3Ph 460V, 60Hz, 3Ph 460V, 60Hz, 3Ph 460V, 60Hz, 3Ph 460V, 60Hz, 3Ph 460V, 60Hz, 3Ph
system dimensions
L x W x H (in/cm) 132 x 45 x 90
(335x114x229)
132 x 45 x 90
(335x114x229)
132 x 45 x 90
(335x114x229)
132 x 45 x 90
(335x114x229)
132 x 45 x 90
(335x114x229)
267 x 41 x 90
(667x104x229)
267 x 41 x 90
(667x104x229)
267 x 41 x 90
(667x104x229)
267 x 41 x 90
(667x104x229)
Weight (lb/kg) 2,230 (1,060) 2,260 (1,060) 3,090 (1,400) 3,860 (1,750) 4,220 (1,920) 5,390 (2,450) 5,870 (2,260) 7,150 (3,250) 7,570 (3,440)
operating limits
Design Temperature (°F/°C)** 77 (25) Maximum Turbidity (NTU)*** 0
Maximum Feed Temperature (°F/°C)** 85 (29) Maximum Free Chlorine (ppm) 0
Minimum Feed Temperature (°F/°C)** 41 (5) Maximum TDS (ppm)*** 40,000
Maximum Ambient Temperature (°F/°C) 120 (49) Maximum Hardness (gpg)*** < 1
Minimum Ambient Temperature (°F/°C) 40 (4) Maximum pH (Continuous) 11
Maximum Feed Pressure (psi/bar) 85 (6) Minimum pH (Continuous) 3
Minimum Feed Pressure (psi/bar) 45 (3) Maximum pH (Cleaning 30 Min.) 12
Maximum Piping Pressure (psi/bar) 1000 (69) Minimum pH (Cleaning 30 Min.) 2
Maximum SDI Rating (SDI) < 3 Maximum Turbidity (NTU)*** <1

*Product flow and recovery rates are based on feedwater conditions of 38000ppm TDS at 77°F. Treatment ability of the RO system is dependent on feed water quality. Higher TDS and/or lower temperatures will reduce product flow. An Aqua-Chem Applications Engineer can rate the units for these other feed water conditions.    

**Appropriate ltration must be installed in order to prevent premature membrane fouling.    

***Scale prevention measures must be taken to prolong membrane life.