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 intended for brackish-water desalination and industrial or municipal water-treatment duties.
Listed applications include industrial water treatment, pharmaceutical water treatment, wastewater treatment in dyeing and printing operations, water reuse, and zero liquid discharge systems.
Published performance under the stated test conditions is 11,000 GPD (41.6 m³/day) permeate flow, 99.6% stabilized salt rejection, and 99.4% minimum salt rejection. These values are based on 2,000 ppm Na. Cl feedwater at 225 psi (15.5 bar), 77°F (25°C), pH 7 ±0.5, and 15% recovery.
Individual-element permeate flow may vary by ±15%. Stabilized salt rejection is generally reached after 24–48 hours of continuous operation, depending on feedwater characteristics and operating conditions. The element has 400 ft² (37 m²) of active membrane area and a 28 mil feed spacer.
Its listed dimensions are 40.0 inches (1,016 mm) long and 7.9 inches (201 mm) in diameter, with a 1.125-inch (28.6 mm) dimension also provided in the source data.
Operating limits include a maximum pressure of 600 psi (4.14 MPa), maximum temperature of 45°C, maximum feed flow of 17.0 m³/h, maximum feed SDI of 5, free-chlorine tolerance below 0.1 ppm, and maximum pressure drop of 15 psi (0.1 MPa) per element.
The continuous operating pH range is 2–11;the chemical-cleaning pH range is 1–13. Procurement note: Although the original listing title refers to sea-water filtration, the identified model and published test basis describe a BW 400 brackish-water membrane.
Buyers considering seawater service should confirm the exact membrane model, feed salinity envelope, required operating pressure, projected recovery, and system design before ordering.
Also confirm the meaning of the listed 1.125-inch dimension, pressure-vessel fit, connection geometry, required pretreatment, cleaning protocol, certification documents, quantity, packaging, lead time, warranty, and whether project-specific customization is available.
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.
- Length
- 40.0 in (1,016 mm)Based on visible page data; confirm exact value in the RFQ.
- Test pH
- 7 ±0.5Based on visible page data; confirm exact value in the RFQ.
- Diameter
- 7.9 in (201 mm)Based on visible page data; confirm exact value in the RFQ.
- Feed spacer
- 28 milBased on visible page data; confirm exact value in the RFQ.
- Test pressure
- 225 psi (15.5 bar)Based 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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