Pallas LP 4040HF 4" x 40" High Flow Reverse Osmosis Membrane Element

The Pallas LP 4040HF is a high-performance 4" x 40" High Flow reverse osmosis membrane element engineered to deliver increased water production while maintaining outstanding salt rejection. Designed for commercial and industrial reverse osmosis systems, the LP 4040HF combines high permeate flow with energy-efficient low-pressure operation.

Compatible with standard 4040 membrane housings, the LP 4040HF is an excellent choice for new installations or as a direct replacement membrane where higher production capacity is required.

High Flow Performance

The LP 4040HF produces up to 12.1 m³/day (3,200 GPD) while maintaining a stable salt rejection of 99.5%, providing consistently high-quality purified water for demanding applications. The increased flow rate makes it ideal for systems requiring greater water production without sacrificing water quality.

Key Features

• High Flow 4" x 40" reverse osmosis membrane
• Produces up to 3,200 GPD (12.1 m³/day)
• Stable 99.5% salt rejection
• Minimum 99.2% salt rejection
• Low-pressure operation for reduced energy consumption
• Fits all standard 4040 membrane housings
• High production capacity for commercial and industrial systems
• Thin-film composite polyamide membrane construction
• Long service life with proper maintenance
• Excellent replacement for standard 4040 high-flow RO membranes

Typical Applications

The LP 4040HF is ideal for:

• Commercial reverse osmosis systems
• Industrial water treatment
• Food and beverage manufacturing
• Hospitality and hotels
• Car wash water recycling
• Agriculture and irrigation
• Pharmaceutical water pre-treatment
• Process water production
• Drinking water purification
• High-demand RO installations

Technical Specifications

Standard Test Conditions

Performance figures are based on the following test conditions:

• Feed water: 2,000 ppm NaCl
• Operating pressure: 150 psi
• Water temperature: 25°C
• pH: 7–8
• Recovery rate: 15%

Why Choose the Pallas LP 4040HF?

The Pallas LP 4040HF has been designed for applications where higher water production is essential. Compared with a standard LP 4040 membrane, the High Flow version delivers approximately 18% greater permeate flow while maintaining the same exceptional 99.5% salt rejection.

Its low-pressure operation helps reduce energy costs, while the high rejection rate protects downstream equipment and ensures consistently high-quality product water. Whether used in commercial water treatment or industrial process applications, the LP 4040HF provides reliable, efficient performance.

Frequently Asked Questions

What is the difference between the LP 4040 and LP 4040HF?

The LP 4040HF is the High Flow version of the standard LP 4040. It produces up to 3,200 GPD, compared with 2,700 GPD for the standard model, while maintaining the same 99.5% stable salt rejection.

Does the LP 4040HF fit standard membrane housings?

Yes. The LP 4040HF is manufactured to the industry-standard 4" × 40" dimensions and fits standard 4040 reverse osmosis membrane housings.

What does HF mean?

HF stands for High Flow, indicating that the membrane has been designed to produce a higher volume of purified water while maintaining excellent rejection performance.

What water output can I expect?

Under standard test conditions, the membrane produces up to 3,200 gallons per day (12.1 m³/day). Actual production will depend on feed water quality, operating pressure and temperature.