1、Product: Spacer Tube Membrane RO/NF (STRO / STNF).
2、Industry trend: Membrane technology development drives differentiated performance requirements.
3、Key demands: Lower feed water quality requirements, higher pressure for improved concentration ratio, longer cleaning cycles and service life.
4、Solution: Open-channel high-pressure membranes (STRO/STNF) were developed to meet these needs.
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
Detailed technical documents are available for download.
For custom solutions, please contact our technical team.
Email us at info@risingsunmem.com for expert support.
| 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