All membrane sheet we used for disc tube RO are manufactured by the most professional membrane manufactur in USA. The highest membrane sheet quality can guarantee the best performance.
Membrane cushion types for disc tube technology (RCDT / DTRO module) in two membrane shapes:
1. Round shape
2. Octagonal shape
Membrane Cushion Drawing


Membrane Cushion Specifications
BW30 (75bar) | SW30 (90bar) | Special SW (120bar) | |
Material: | Polyamide TFC | Polyamide TFC | Polyamide TFC |
Type: | Round | Round | Round |
Outer Diameter: | 184mm+/-1.0mm | 184mm+/-1.0mm | 184mm+/-1.0mm |
Inner Diameter: | 44mm+/-1.0mm | 44mm+/-1.0mm | 44mm+/-1.0mm |
*Nominal NaCl Rejection at 25ºC: | 98.50% | 99.50% | 99.50% |
**Salt Rejection Range in Waste Water: | 95.0%-99.0% | 97.5%-99.5% | 97.5%-99.5% |
*Test conditions:BW30, 2,000mg/l NaCl @15.5bar,25ºC; SW30 and special SW test based 32,000mg/l NaCl @55bar, ,25ºC;
**Final rejection depends on waste water characteristics, temperature, recovery rate, operation pressure, flow rate.
- Treatment & re-use of landfill leachate
- High concentration of industrial waste water
- Effluent & waste water treatment from API, formulation plant & combined effluent from pharmaceuticals industry
- Effluent treatment from textile industry and dyeing unit
- Picking & oily waste treatment in steel industry
- Metal recovery waste recycling
- Traditional spiral RO / NF concentrate treatment
- High COD/BOD waste water treatment (max. COD 20,000ppm)


1. We use the best quality membrane sheet (BW / SW) to promise the best performance.
2. Low membrane cushion replacement costs, fast delivery date.
3. Cross reference: Rochem DT module and PF module, Rotreat RCDT module
4. We can offer different kinds of membrane sheet to make membrane cushion as per customer's request.
5. We can offer both round and octagonal shaped membrane cushions.
RisingSun Membrane is a successful manufacturer of Disc Tube RO (DTRO) or so called RCDT membrane module mainly for landfill leachate and other high TDS / COD waste water.