
HED Group - We are proud to supply RO ESPA4-LD membranes from Nitto Denko/ Hydranautics, the manufacturer, in Vietnam.
| Permeate Flow ESPA4-LD | 12,000 gpd (45.4 m3/d) |
| Salt Rejection ESPA4-LD | 99.2% (99.0% minimum) |
| Test Conditions ESPA4-LD | 500 ppm NaCl solution |
| 100 psig (0.7 MPa) Applied Pressure | |
| 77 °F (25 °C) Operating Temperature | |
| 15% Permeate Recovery | |
| 6.5 - 7.0 pH Range |
The Specified Performance is based on data taken after a minimum of 10 minutes of operation. Actual testing of elements may be done at conditions which vary from these exact values; in which case, the performance is normalized back to these standard conditions. Permeate flow for individual elements may vary ±15 percent from the value specified.

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Packaging: All membrane elements are supplied with a brine seal, interconnector, and O-rings. Elements are enclosed in a sealed polyethylene bag containing less than 1.0% sodium meta-bisulfite solution, and then packaged in a cardboard box.

| Maximum Applied Pressure: | 600 psig (4.14 MPa) |
| Maximum Chlorine Concentration: | < 0.1 ppm |
| Maximum Operating Temperature: | 113 °F (45 °C) |
| pH Range, Continuous (Cleaning): | 2-10 (1 -12) |
| Maximum Feedwater Turbidity: | 1.0 NTU |
| Maximum Feedwater SDI (15 mins): | 5.0 |
| Maximum Feed Flow: | 85 gpm (19.3 m3/h) |
| Minimum Brine Flow: | 12 gpm (2.7 m3/h) |
| Maximum Pressure Drop for Each Element: | 15 psi (0.10 MPa) |
HED GROUP JOINT STOCK COMPANY
Head Office: 92B Tay Son Street., Phu Tho Hoa Ward, Ho Chi Minh City.
Phone: (+84) 931 83 83 85
Email: vi.ntt@hedgroup.vn
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