BW 400 8-Inch Spiral-Wound Brackish Water RO Memb | RFQ Sourcing Details
Filtration And Membranes · Quote on request
This is a product procurement detail page: check specs, images, category context and related sourcing paths before sending an RFQ.
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Buyer's Digest
Use this page as a product-first sourcing checkpoint before sending an RFQ. Category: Filtration And Membranes. Confirm application fit, capacity, materials, destination, lead time and compliance requirements before comparing suppliers.
Original product description
The BW 400 is an 8-inch spiral-wound reverse osmosis membrane element for brackish water and industrial water-treatment systems.
Its stated applications include brackish water desalination, industrial water treatment, pharmaceutical water treatment, wastewater treatment in dyeing and printing operations, and zero liquid discharge projects. Under the stated standard test conditions—2,000 ppm Na.
Cl feed, 225 psi (15.5 bar), 77°F (25°C), pH 7 ±0.5, and 15% recovery—the element has a nominal permeate flow of 11,000 GPD (41.6 m³/day), stabilized salt rejection of 99.6%, and minimum salt rejection of 99.4%. Individual-element permeate flow may vary by ±15%.
Stabilized salt rejection is generally reached after 24–48 hours of continuous operation, depending on feedwater and operating conditions. The element provides 400 ft² (37 m²) of active membrane area and uses a 28 mil feed spacer.
Listed dimensions are 40.0 inches (1,016 mm) long, 7.9 inches (201 mm) in diameter, and 1.125 inches (28.6 mm) for the third stated dimension.
Operating limits include 600 psi (4.14 MPa) maximum pressure, 45°C maximum temperature, 17.0 m³/h maximum feed flow, feed SDI of 5 maximum, free-chlorine tolerance below 0.1 ppm, continuous operating pH of 2–11, cleaning pH of 1–13, and a maximum pressure drop of 15 psi (0.1 MPa) per element.
Before procurement, buyers should confirm that the BW 400 designation and stated dimensions match the required pressure vessel and system configuration. Feedwater analysis should be reviewed against salinity, SDI, chlorine, temperature, pH, flow, recovery, and pressure limits.
Buyers should also confirm required pretreatment, cleaning procedures, projected permeate quality and flow under actual site conditions, quantity, packaging, documentation, and any project-specific customization.
BW | Applications and Buyer Notes
BW is organized as a sourcing-ready Filtration And Membranes reference. The page combines visible product or company data with structured procurement cues so buyers can compare application fit, specifications, quantity, quality requirements and lead-time quest
Applications
- Initial shortlist building for related product or supplier options.
- Specification and application fit review before bulk purchasing.
- Category, keyword and detail-page comparison before sending an RFQ.
Key specifications
- Category
- Filtration and MembranesBased on visible page data; confirm exact value in the RFQ.
- Unit
- setBased on visible page data; confirm exact value in the RFQ.
- Model
- BW 400Based on visible page data; confirm exact value in the RFQ.
- Feed spacer
- 28 milBased on visible page data; confirm exact value in the RFQ.
- Maximum feed SDI
- 5 SDI units stated as maximum feed SDI 5 in source facts.Based on visible page data; confirm exact value in the RFQ.
- Standard test pH
- 7 ±0.5Based on visible page data; confirm exact value in the RFQ.
- Maximum feed flow
- 17.0 m³/hBased on visible page data; confirm exact value in the RFQ.
- Standard test feed
- 2,000 ppm NaClBased on visible page data; confirm exact value in the RFQ.
Buyer tips
- State quantity range and split-delivery needs before price comparison.
- Add certification, material or inspection standards when they affect acceptance.
- For time-sensitive projects, include target arrival date and destination.
- For special applications, describe operating condition, installation environment and duty cycle.
FAQ
What should buyers confirm first?
Confirm application, specification, quantity, destination and lead-time requirements before comparing offers.
Can buyers inquire when specs are incomplete?
Yes. Add model, material, size, use case and inspection needs in the RFQ to make replies comparable.
How should this listing be evaluated?
Check title, category, specifications and related keywords against the actual sourcing requirement.
Source mix: ugc
Key specifications
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