Membranes
DuPont TapTec LC HF
DuPont TapTec LC HF-4040 is a 4-inch commercial RO membrane. Compare test flow, salt rejection, vessel, feedwater, and pretreatment before ordering it.
Short answer
PT Watermart Perkasa, operating at water.co.id, supplies the DuPont TapTec LC HF-4040 commercial RO membrane in Indonesia for commercial drinking-water systems and 4-inch RO skids. It has a 2,800 GPD average test flow and 99.0% stabilized salt rejection; final selection still depends on feedwater, permeate target, recovery, pretreatment, pressure, and vessel configuration.
LC HF-4040 is a spiral-wound polyamide thin-film composite element for a nominal 4-inch pressure vessel. Its capacity is a manufacturer test result, not guaranteed site output. Updated 22 July 2026.
What are the main TapTec LC HF-4040 specifications?
The most useful buyer specifications are its 4 × 40-inch format, 2,800 GPD average test flow, and 99.0% stabilized salt rejection. These values use 1,500 ppm NaCl, 25°C, 15% recovery, pH 7, and 150 psi, so site projections must be corrected for the actual feed and system design.
| Parameter | Data-sheet value |
|---|---|
| Membrane type | Polyamide thin-film composite |
| Element size | 3.9-inch diameter × 40-inch length |
| Pressure vessel | Nominal 4-inch I.D. |
| Average permeate flow | 2,800 GPD (10.6 m³/day) |
| Minimum / stabilized salt rejection | 98.5% / 99.0% |
| Maximum feed flow | 16 gpm (3.6 m³/h) |
| Maximum pressure drop | 15 psi (1.0 bar) |
| Operating pH range | 3-10; cleaning 2-12 |
| Maximum feed SDI | 5 |
| Free chlorine | Below 0.1 ppm; oxidants require pretreatment control |
Source: DuPont TapTec LC HF-4040 data sheet, December 2022 revision. Confirm the current revision and model code when requesting a quotation.
When is TapTec LC HF-4040 a suitable choice?
TapTec LC HF-4040 is worth considering for a 4-inch commercial RO system when the feedwater and capacity target fit its design range. For industrial brackish water, compare it with FilmTec BW30 Pro 4040; for seawater, use a FilmTec SW30 membrane, not TapTec.
| Buyer need | Selection direction |
|---|---|
| Replacing a 4-inch element in a commercial skid | Match the old label, vessel, adapters, brine seal, feedwater, and operating data |
| Commercial drinking-water production | Calculate daily and peak demand; define storage, sanitation, and quality verification |
| Higher-TDS brackish feed | Compare TapTec with a BWRO element using design software and the current data sheet |
| Seawater feed | Use an SWRO element and a pressure vessel rated for the design |
| Residential under-sink system | Consider an integrated unit such as Pentair ES60-S RO, not a loose 4-inch element |
What information should be supplied before ordering?
Provide the water analysis, TDS, temperature, pH, SDI or turbidity, residual chlorine, permeate flow and quality target, recovery, pressure, element count, vessel size, pretreatment, and a photo of the existing element label. These inputs prevent selection based only on a model name or nominal capacity claim.
RO product water is not automatically ready to drink. Commissioning, sanitation, flushing, consumables records, representative sampling, and laboratory verification against applicable Indonesian drinking-water requirements are still required.
Buyer questions about TapTec LC HF-4040
Is 2,800 GPD the guaranteed site capacity?
No. It is the average permeate flow under manufacturer test conditions. Temperature, TDS, pressure, recovery, fouling, scaling, and element age change actual production.
Is TapTec LC HF-4040 chlorine tolerant?
The data sheet specifies free chlorine below 0.1 ppm and warns that oxidants can cause premature membrane failure. Pretreatment must control residual chlorine before the membrane.
How do I request a replacement check?
Send the design data and a photo of the old element label to Watermart. Include symptoms such as declining flow, rising permeate conductivity, increasing pressure drop, or shorter CIP intervals.