As a full-spectrum industrial liquid filtration solution supplier centered on Liquid Filters, we independently develop and produce a full lineup of spiral-wound RO elements in our ISO 9001-certified manufacturing facility. All seawater RO products adopt internally developed, field-tested polyamide membrane chemistry and standardized spiral-wound fabrication workflows, supported by strict in-house quality inspection at every production stage. The TSC series, represented by the TSC20-400 model, is our self-manufactured standard seawater RO element built on time-tested membrane formulas, delivering proven high salt rejection performance to satisfy general seawater desalination projects without strict boron removal or extreme low-temperature operational requirements.
As a full-spectrum industrial liquid filtration solution supplier centered on Liquid Filters, we independently develop and produce a full lineup of spiral-wound RO elements in our ISO 9001-certified manufacturing facility. All seawater RO products adopt internally developed, field-tested polyamide membrane chemistry and standardized spiral-wound fabrication workflows, supported by strict in-house quality inspection at every production stage. The TSC series, represented by the TSC20-400 model, is our self-manufactured standard seawater RO element built on time-tested membrane formulas, delivering proven high salt rejection performance to satisfy general seawater desalination projects without strict boron removal or extreme low-temperature operational requirements.
Typical coastal seawater has TDS concentrations ranging from 30,000–40,000 mg/L, dominated by sodium chloride alongside magnesium, calcium and sulfate ions. Economy-grade entry RO elements often suffer unstable permeate TDS and short service cycles, failing to meet baseline domestic drinking and industrial freshwater standards. Manufactured in our own production plant with validated separation layer technology, TSC20-400 maintains steady high salt interception under standard seawater operating pressure. It adopts universal 8-inch spiral wound dimensional specifications, fully compatible with mainstream seawater pressure vessels on the market, supporting direct plug-and-play replacement of aging membrane elements without large-scale pipeline or high-pressure pump reconstruction. It has become the mainstream standard desalination component for municipal general seawater desalination plants, remote island small water stations, coastal factory auxiliary water supply and small-scale offshore facility freshwater systems.
Separation follows standardized solution-diffusion reverse osmosis mechanisms rather than simple physical screening. The dense cross-linked polyamide active layer acts as a selective barrier: water molecules dissolve and diffuse through the membrane matrix under designated seawater driving pressure, while dissolved monovalent and divalent salt ions are repelled via Donnan electrostatic exclusion effect to complete reliable deep desalination.
Compared with economy-grade entry-level seawater RO elements and premium specialized seawater RO elements, TSC20-400 strikes a balanced performance and cost profile with in-house optimized membrane molecular layout focused on consistent high rejection. Its tightly structured separation layer sustains stable salt interception during year-round continuous operation, while wide streamline feed spacers eliminate internal flow dead zones and mitigate concentration polarization, slowing salt crystal buildup and gradual rejection decay over long-term service.
Under standardized chemical cleaning procedures (pH 1–13, cleaning temperature ≤35°C, single cleaning cycle within 2 hours), the high salt rejection rate and permeate flux of TSC20-400 can recover to more than 96% of factory calibrated values, sustaining consistent desalination performance for regular coastal seawater intake conditions.
All certified performance indicators are tested under unified simulated standard seawater conditions, fully matching conventional coastal desalination operating environments:
Product Positioning: Proven standard spiral wound seawater RO membrane optimized for high TDS rejection only, without specialized boron interception design
Structural Type: Spiral wound industrial RO membrane element
Standard Test Condition: 25°C, 800 psi, 32000 ppm simulated standard seawater
Stabilized High Salt Rejection Rate: ≥99.6%
Boron Removal Note: Not engineered for dedicated boron rejection; average boron removal rate under standard test conditions reaches 82%
Rated Permeate Flux (8040 spec): 7800–9100 GPD
Continuous Operating Pressure Range: 600–900 psi
Maximum Long-Term Continuous Operating Temperature: 40°C
Short-Term Peak Tolerance Temperature (≤2 hours emergency exposure only): 45°C
Long-Term Stable Operating pH Range: 2.0–11.0
Short-Term Chemical Cleaning pH Limit: 1.0–13.0
Maximum Allowable Feed Water SDI: ≤3
Single Element Pressure Drop: ≤15 psig
1.Flux and high salt rejection data are calibrated at 25°C standard temperature; permeate flux drops roughly 3% per 1°C temperature reduction. Temperature correction coefficients must be applied for engineering design calculation of cold winter coastal seawater projects.
2.Stable ≥99.4% minimum high salt rejection can be guaranteed within continuous operating temperature 15–40°C and feed water salinity ≤38000 ppm. 45°C is only permitted for short-duration peak exposure under emergency conditions, not for permanent daily operation. Long-term running above 40°C will accelerate polyamide layer hydrolysis and shorten usable service lifespan.
3.Long-cycle stable high salt rejection performance requires complete removal of free chlorine in the pretreatment system to prevent irreversible oxidation damage to the polyamide separation layer.
1.Field-proven high salt rejection meets universal freshwater TDS standards
With certified ≥99.6% stabilized high salt rejection rate, TSC20-400 achieves full-spectrum dissolved salt interception in a single pass. Produced permeate complies with baseline drinking and industrial process water standards for conventional coastal projects. This element is not formulated for strict boron limits; projects requiring permeate boron below 2.4 mg/L shall select our dedicated TSE boron-rejection seawater RO series.
| Comparison Dimension | Economy-Grade Entry RO | TSC20-400 Standard High Rejection RO | Premium Specialized RO |
|---|---|---|---|
| Stabilized Salt Rejection | ≥98.5% | ≥99.6% | ≥99.75% |
| Average Boron Removal | ≤80% | 82% (non-optimized) | ≥94% |
| Recommended Continuous Temp | 15–35°C | 15–40°C | 5–45°C |
| Typical Service Lifespan | 2–3 years | 3–5 years | 5–7 years |
| Relative Unit Procurement Cost | Low | Mid-range | High |
2.Balanced high rejection performance and controllable expenditure for mass replacement
Built on mature in-house membrane production workflows focused on reliable high salt rejection, TSC20-400 balances stable desalination output and competitive unit pricing. For municipal desalination plants and island facilities requiring annual bulk element replacement, it cuts total spare parts expenditure while maintaining qualified long-term water quality.
3.Extended maintenance interval under standard pretreatment
Under standardized inlet conditions (SDI ≤3, system total recovery ≤35%), TSC20-400 extends routine chemical cleaning cycles from the industry baseline 90 days to 110–115 days, a 22–28% extension compared with economy-grade entry seawater elements. Wide streamline feed spacers minimize localized salt deposition and reduce unplanned system shutdown frequency for maintenance, preserving consistent high rejection performance between cleaning cycles.
4.Universal spiral wound dimensions for low-cost retrofits
TSC20-400 follows unified 8-inch industrial spiral wound measurements, fully interchangeable with mainstream market pressure vessels. Aging elements can be swapped without pipeline or high-pressure pump modification, shortening renovation timelines and cutting project transformation costs for water plant operators.
5.Reliable post-cleaning performance recovery extends overall <strong>RO membrane lifespan</strong>
After standardized acid-base maintenance cycles, flux and high salt rejection recover above 96% of factory benchmark values. No permanent fouling embedding occurs within its design service window, lowering annual membrane replacement volumes for medium and large desalination stations.
Relying on time-tested high salt rejection and balanced cost performance, TSC20-400 serves as the core separation element for all conventional seawater desalination projects without stringent boron or ultra-low-temperature constraints. All design and performance indicators comply with general seawater desalination industry engineering specifications.
Coastal municipal general desalination plants: Primary desalination unit for urban routine freshwater supply, matching seasonally variable average-salinity seawater intake.
Remote island domestic water stations: Medium-small desalination equipment for resident daily use, suited to projects with constrained capital budgets and no strict boron limits.
Coastal light industrial auxiliary water supply systems: Produce process water for aquaculture, port logistics and light manufacturing factories.
Small-scale offshore platform basic water supply units: Compact RO modules for non-specialized marine freshwater demand.
Desalination OEM supporting spare parts: Standard matching element for mass-produced general desalination complete sets.
For seawater desalination EPC engineers and water station design institutes, complete high salt rejection, flux and temperature correction test data provide reliable sizing references for membrane arrays, high-pressure pumps and pretreatment systems, supporting low-maintenance standard desalination plant layout.
Every batch of TSC20-400 undergoes full performance testing with simulated standard seawater before dispatch, with serial-numbered inspection logs documenting high salt rejection, flux, pressure drop and cleaning recovery metrics. The whole in-house manufacturing flow complies with ISO 9001 quality management system, all wetted raw materials meet general seawater desalination safety criteria, and core high rejection indicators pass third-party water treatment engineering certification.
Complete datasheets containing temperature correction curves, routine maintenance guidelines and batch traceability records are supplied alongside shipments for tender filing, engineering design and plant acceptance. Finished elements are vacuum sealed with dedicated anti-drying preservation liquid to avoid separation layer damage during transit and storage, ensuring field installation performance matches factory calibrated high rejection benchmarks under qualified pretreatment.
Our internal R&D team continues to refine polyamide separation layer formulas and internal feed spacer geometry for the TSC product line. Current development targets a 5–8% lift in low-temperature (15°C) permeate flux while retaining existing high salt rejection levels and mid-range cost positioning, with field trial samples available for qualified project partners in advance of the 2027 market launch. New iterations will retain universal 8-inch spiral wound dimensions to maintain full compatibility with existing desalination hardware.
This industrial spiral wound seawater RO membrane model TSC20-400 is fully self-manufactured within our certified production facility, with proven standard high salt rejection as its core technical strength. It is engineered specifically for conventional coastal and island seawater desalination projects without strict boron removal or extreme low-temperature operating demands. Through balanced polyamide separation layer design and anti-concentration-polarization wide feed spacers, it delivers consistent high salt interception during long-duration continuous seawater treatment.
When benchmarked against economy-grade entry seawater elements, TSC20-400 sustains stable high rejection permeate quality with fewer maintenance interruptions; when compared to premium specialized boron/low-temperature seawater elements, it delivers more competitive bulk procurement pricing for standard projects. It delivers consistent freshwater output and reduced full-cycle operational expenditure for municipal general desalination facilities, remote island water stations and coastal light industrial water systems. For conventional desalination EPC firms, island operation & maintenance teams and general water treatment design institutes seeking balanced high rejection performance and controlled capital outlay, it is a reliable standard industrial seawater RO element solution.
Q1: What key performance gaps exist between TSC20-400, economy entry elements and premium specialized seawater RO?
A1: TSC20-400 hits ≥99.6% stabilized high salt rejection, far exceeding the ≥98.5% rating of economy-grade elements, with a 3–5 year typical service lifespan versus 2–3 years for entry models. It does not feature dedicated boron interception structure like premium TSE series (≥94 boron removal), so it is not recommended for projects with strict permeate boron limits below 2.4mg/L. Premium products also support continuous operation down to 5°C, while TSC20-400’s steady long-term operating floor is 15°C.
Q2: Can TSC20-400 directly replace existing 8040 seawater RO elements on original standard desalination equipment?
A2: Yes, it adopts universal industrial spiral wound dimensions compatible with mainstream seawater pressure vessels. Minor operating pressure adjustment post-replacement restores certified flux and high salt rejection performance; temperature correction factors must be integrated into engineering calculations for cold coastal winter intake.
Q3: What pretreatment thresholds must be maintained to preserve long-term stable high salt rejection?
A3: Feed water SDI shall be consistently controlled below 3; all free chlorine must be eliminated via activated carbon or reducing agent dosing. Softening pretreatment is required for high-hardness seawater to prevent irreversible scaling damage. Continuous operating temperature must stay within 15–40°C; 45°C exposure is only allowed for short emergency peaks to avoid accelerated membrane hydrolysis and permanent loss of high rejection capacity.
Q4: Is TSC20-400 suitable for projects requiring strict boron removal or extreme cold seawater desalination?
A4: Not recommended. This element is optimized solely for high TDS rejection in regular salinity seawater. For facilities with strict boron discharge limits or year-round sub-15°C raw water intake, our TSE boron-rejection and SW30XHR low-temperature seawater RO series are appropriate alternatives.
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