Disc Tube RO/NF Membrane / DTRO/DTNF
Disk tubular membrane technology referred to as DT, common for disk tubular RO（DTRO) and disk tubular (DTNF). The membrane module structure is distinct from the traditional spiral wound membrane.With open flow channels,feed flows through the entrance into the pressure vessel and reach the disk in a short distance. Then the feed flows 180 degrees from one side of the membrane reverse flow into the other side of the membrane,into the next disk again and finally runoff from outlet.The special design makes feed collide with the disk bulge through the membrane surface forming turbulence which increases flow rate and self-cleaning function and long service life of the membrane.
FEATURES：
High strength design, up to 120 bar operating pressure
Open disk with low flow resistance and concentration polarization
High pressure resistance and salt rejection membrane
APPLICATION：
Landfill leachate
High concentration of industrial wastewater
Spiral wound RO/NF concentrates
Industrial high salts water
| Type | DTRO | DTNF | |
| Model | SP-DTRO3-8042 | SP-DTRO5-8042 | SP-DTNF-8042 |
| Mode | RO3 | RO5 | NF2 |
| Disk qty. (pc) | 209 | 209 | 209 |
| Membrane effective area (㎡) | ＞9.4 | ＞9.4 | ＞9.4 |
| Feed flux (l/h) | 500-1200 | 500-1200 | 500-1200 |
| Permeate flux range**（L/h） | 420 | 400 | 450 |
| Rejection**（％） | 98.5 | 99.5 | 98 |
| Min. desalination rate（%） | 97.5 | 99 | 96 |
| Disk material | ABS | ABS | ABS |
| Vessel materia | Fiberglass | Fiberglass | Fiberglass |
| Operation pressure (bar) | 75 | 90 | 90 |
| Max. TMP (bar) | 9 | 9 | 9 |
| Max. operation temperature (℃) | 40 | 40 | 40 |
| Chlorine tolerance (ppm) | <0.1 | <0.1 | <0.1 |
| pH (continuous) | 3-11 | 3-11 | 3-11 |
| pH (cleaning) | 2-12 | 2-12 | 2-12 |
| Pressure | 75 | 90 |
| Total length of membrane module A（mm） | 1400 | 1400 |
| Membrane shell length B（mm） | 1150 | 1150 |
| Membrane module diameter C（mm） | 216 | 216 |
| Support height D（mm） | 98 | 98 |
| The distance between the inlet and the center E（mm） | 420 | 450 |
| The distance between the concentrated water outlet and the center F（mm） | 56 | 56 |
| Diameter of inlet/concentrate interface（mm） | 12 | 12 |
| Water production interface（mm） | Quick hose interface 11.6×9 | Quick hose interface 11.6×9 |
| Type | DTRO-H | |
| Model | SP-DTRO5-8042-H | SP-DTRO6-8042-H |
| Mode | RO5 | RO6 |
| Plate qty. (pc) | 209 | 209 |
| Membrane area (㎡) | ＞9.4 | ＞9.4 |
| Feed flux (l/h) | 500-1200 | 500-1200 |
| Water yield**（L/h） | 400 | 320 |
| Stable salt rejection **（％） | 99.5 | 99.6 |
| Min. salt rejection（%） | 99 | 99 |
| Disk material | ABS | ABS |
| Vessel materia | Fiberglass | Fiberglass |
| Operation pressure (bar) | 120 | 160 |
| Max. TMP (bar) | 9 | 9 |
| Max. operation temperature (℃) | 40 | 40 |
| Chlorine tolerance (ppm) | <0.1 | <0.1 |
| pH(continuous) | 3-11 | 3-11 |
| pH@40℃(cleaning) | 2-12 | 2-12 |
| Pressure(bar) | DTRO-H |
| Total length of membrane module A（mm） | 1400 |
| Flange spacing B（mm） | 1225 |
| Flange width C（mm） | 240 |
| The distance between the inlet and the center E（mm） | 76 |
| The distance between the concentrated water outlet and the center F（mm） | 56 |
| Diameter of inlet/concentrate interface（mm） | 12 |
| Water production interface（mm） | Quick hose interface 11.6×9 |
| No. | Part name | No. | Part name | No. | Part name | No. | Part name |
| 1 | 中心拉杆 | 7 | 下端盖 | 13 | O型圈14-2 | 19 | 上法兰 |
| 2 | 厚螺母 | 8 | 净水收集套 | 14 | O型圈52-4 | 20 | 膜壳 |
| 3 | 上端干 | 9 | 拉杆垫片 | 15 | O型圈48-2 | 21 | 加强螺杆 |
| 4 | 补充轴套 | 10 | 薄螺母 | 16 | DTRO膜片 | 22 | 下法兰 |
| 5 | 导流盘 | 11 | 进出水接头 | 17 | O型圈39-3 | 23 | 加强螺母 |
| 6 | 唇形密封圈 | 12 | 净水接头 | 18 | 拉杆轴套 |
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DTRO Product Literature