LP22-8040 Low-Pressure RO Membrane – 8″ × 40″, 10,500 GPD

The LP22-8040 Reverse Osmosis Membrane is a high-capacity, low-pressure membrane element designed for brackish-water desalination and industrial water purification. Its standard 8-inch × 40-inch configuration supports installation in compatible 8040 pressure vessels and multi-element reverse osmosis systems.

Under specified test conditions, the LP22-8040 provides a nominal permeate flow of 10,500 gallons per day (approximately 39.7 cubic meters per day) with a stable salt-rejection rate of 99.7%. Its combination of substantial permeate production and high rejection makes it suitable for industrial systems requiring effective dissolved-solids reduction.

The spiral-wound element provides approximately 400 square feet of active membrane area and uses a 28-mil feed spacer. It is designed for qualifying brackish water, groundwater, surface water and municipal water with higher dissolved-solids concentrations than those normally recommended for ultra-low-pressure membranes.

Proper pretreatment is essential for controlling sediment, hardness, scale, silica, iron, organic fouling and oxidizing chemicals. Feedwater chemistry, recovery, operating pressure and required permeate quality should be evaluated during system design.

Technical Specification

Testing Conditions

Testing Pressure: 225 psi (1.55MPa)

Testing Solution Temperature: 25 ℃

Concentration of Testing Solution (NaCl): 2000ppm

pH value of Testing Solution: 7.0±8.5

Recovery Rate of Single Element: 15%

Key Features

• Low-pressure operation for reduced energy demand
• High salt and TDS rejection performance
• Thin Film Composite (TFC) membrane technology
• Standard 4.0″ × 40″ (4040) membrane format
• Stable permeate flow under typical municipal pressures
• Long service life with proper pretreatment
• Ideal for commercial and industrial RO applications

Applications

◎ Drinking water production, such as: packaged water, direct drinking water, food processing water, etc.

◎ Purified water production, such as: pharmaceutical water, medical water, electronics water, etc.

Shipping Information

Optimal Purity Solutions is committed to fast, reliable, and professional fulfillment for our authorized dealer network.

Fulfillment & Processing

• Order Processing: Most in-stock orders ship within 1–2 business days

• Custom/OEM Builds: Lead times vary by configuration; your sales representative will confirm timelines

Shipping Coverage

• Domestic: Nationwide shipping throughout the United States

• International: Available for qualified distributors (terms and transit times vary)

Carriers & Methods

• Shipments are sent via trusted national freight and parcel carriers

• LTL/FTL freight available for pallets and bulk orders

• Expedited shipping options available upon request

Packaging & Handling

• Products are professionally packaged to protect against damage in transit

• Palletized and freight shipments are secured and labeled to industry standards

Tracking & Support

• Tracking information is provided once your order ships

• Our logistics team is available to assist with routing, delivery coordination, and special requirements

Important Notes

• Shipping costs are calculated based on weight, dimensions, destination, and service level

• Damages or discrepancies must be reported within 48 hours of delivery

• Products are sold exclusively through authorized water treatment dealers and partners