Spacer Tube Membrane RO/NF STRO / STNF
With the development of membrane technology industry, there are differentiated requirements to the performance of the membrane products, such as lower feed quality requirements, higher pressure to improve concentration ratio, longer cleaning cycle and service life. As a result, the open channel type with high pressure membrane arises at the historic moment.
FEATURES：
High strength design, up to 120 bar operating pressure
Open feed spacer with low flow resistance and concentration polarization
Spiral wound structure with more membrane area
More options for feed spacer
APPLICATION：
Industrial wastewater
High salts wastewater
Spiral wound RO/NF concentrates
| DT | ST | Spiral | |
| Structure | Disk | Special roll type | Conventional roll type |
| Flow channel structure | Open flow channel | Trapezoidal open flow channel | Diamond shaped channel |
| Thickness of concentrated water channel（mm） | 1.5 | 0.8-1.2 | 0.4-0.8 |
| Membrane area（㎡） | 0.45-9.4 | 25-29 | 25-41 |
| Use pressure（bar） | 75-160 | 75-120 | 15-41 |
| Preprocessing requirements | ★★ | ★★★ | ★★★★★ |
| Anti pollution ability | ★★★★★ | ★★>★★ | ★★ |
| Type | STRO | STNF | |
| Model | STRO3-8035 | STRO5-8042 | STNF2-8042 |
| Membrane type | RO3 | RO5 | NF2 |
| Membrane effective area (㎡) | 25 | 27 | 27 |
| Feed flux range (m3/h) | 5.5-12 | 5.5-12 | |
| Recommended feed flux (m3/h) | 10 | 10 | |
| Stable permeate flux** (m3/d) | 23 | 24 | 25 |
| Stable salt rejection **(%) | 98.5 | 99.5 | 98 |
| Min. salt rejection (%) | 97.5 | 99 | 96 |
| Feed spacer | Special open channel | ||
| Max. TMP (bar) | 1.0 | 1.0 | |
| Max. operation pressure (bar) | 90 | 90 | |
| Max. operation temperature (℃) | 40 | 40 | |
| pH (continuous) | 3-11 | 3-11 | |
| pH (cleaning) | 2-12 | 2-12 | |
| Chlorine tolerance (ppm) | ≤ 0.1 | ≤ 0.1 | |
| Model | 8035 | 8042 |
| Element total length A（mm） | 1125 | 1305 |
| Membrane shell length B（mm） | 970 | 1150 |
| Support height D（mm） | 75 | 75 |
| Inlet/concentrate water interface（in.） | Clamp type interface 1in. | Clamp type interface 1in. |
| Water production interface（mm） | 2*Quick hose interface 11.6×9 | 2*Quick hose interface 11.6×9 |
| Pressure（bar） | 75 | 90 |
| Membrane module diameter C（mm） | 216 | 216 |
| Type | STRO-H | |
| Model | STRO5-8042-H | STRO6-8042-H |
| Membrane type | RO5 | RO6 |
| Membrane effective area (㎡) | 27 | |
| Feed flux range (m3/h) | 5.5-12 | |
| Recommended feed flux (m3/h) | 10 | |
| Stable permeate flux** (m3/d) | 24 | 20 |
| Stable salt rejection **(%) | 98.5 | 99.6 |
| Min. salt rejection (%) | 99 | 99 |
| Feed spacer | Special open channel | |
| Max. TMP (bar) | 1.0 | |
| Max. operation pressure*** (bar) | 120 | |
| Max. operation temperature (℃) | 45 | |
| Feed (SDI) | ≤ 6.5 | |
| pH (continuous) | 3-11 | |
| pH (cleaning) | 2-12 | |
| Chlorine tolerance (ppm) | ≤ 0.1 | |
| Model | STRO-8042-H | |
| Membrane module pull rod lengthA（mm） | 1305 | |
| Flange spacing B（mm） | 1230 | |
| Flange width C（mm） | 240 | |
| Inlet/concentrate water interface（in.） | Clamp type interface 1in. | |
| Water production interface（mm） | 2*Quick hose interface 11.6×9 | |
| Type | STRO-E | ||
| Type | STRO3-8040-E | STRO5-8040-E | STRO6-8040-E |
| Membrane type | RO3 | RO5 | RO6 |
| Membrane effective area (㎡) | 25 | 27 | 27 |
| Feed flux range (m3/h) | 5.5-12 | ||
| Recommended feed flux (m3/h) | 10 | ||
| Stable permeate flux** (m3/d) | 25 | 24 | 20 |
| Stable salt rejection **(%) | 98.5 | 99.5 | 99.6 |
| Min. salt rejection (%) | 97.5 | 99 | 96 |
| Feed spacer | Special open channel | ||
| Max. TMP (bar) | 1.0 | ||
| Max. operation pressure (bar) | 90 | 120*** | 120*** |
| Max. operation temperature (℃) | 45 | 45 | 45 |
| pH (continuous) | 3-11 | 3-11 | 3-11 |
| pH (cleaning) | 2-12 | 2-12 | 2-12 |
| Chlorine tolerance (ppm) | ≤ 0.1 | ≤0.1 | ≤ 0.1 |
STRO-8042