Hydranautics ESPA Membranes
ESPA
Test Conditions
The stated performance is initial (data taken after 30 minutes of operation), based on the following conditions:
NaCl Solution, PPM* 1500
Applied Pressure**, psig (MPa) 150 psi (1.05)
Operating Temperature, °F (°C) 77° (25°)
Permeate Recovery 15%
pH Range 6.5-7.0
*ESPA4 NaCl Solution tested at 500 PPM
**ESPA4 tested at 100 psig
Application Data
Maximum Applied Pressure, psig (MPa) 600 (4.14)
Maximum Feed Flow, GPM (m3/h) 4040-16(3.6), 8-inch-75(17.0)
Maximum Operating Temperature, °F (°C) 113° (45°)
Feedwater pH Range* 3.0-10.0
Maximum Feedwater Turbidity, NTU 1.0
Maximum Feedwater SDI (15 mins) 5.0
Maximum Chlorine Concentration, PPM <0.1
Maximum Ratio of Concentrate to Permeate Flow for Any Element 5:1
Maximum Pressure Drop for Each Element, psig 10
*See technical literature for extended pH tolerance
 
Hydranautics High Rejection
Model Number
Description
GPD
Nom. Salt Rej., %
ESPA1-4040
4"x40" FRP
2,600
99.3
ESPA2-4040
4"x40" FRP
1,900
99.6
ESPA3-4040
4"x40" FRP
3,000
98.5
ESPA4-4040
4"x40" FRP
2,500
99.2
ESPA1
8"x40" FRP
12,000
99.3
ESPA2
8"x40" FRP
9,000
99.6
ESPA2+
8"x40" FRP
9,000
99.6
ESPA3
8"x40" FRP
14,000
98.5
ESPA4
8"x40" FRP
12,000
99.2
ESPAB
8"x40" FRP
8,600
99.2
*ESPA4 NaCl Solution Teested at 500 PPM