LP21-4040

Summary

Product identification

The LP21-4040 is a Low Pressure RO Membrane Element from the LP Series.

Application

This series is primarily used in the desalination of brackish water, featuring low operating pressure, high permeate flow, and high rejection. It performs well in rejecting soluble salts, Total Organic Carbon (TOC), and silicon dioxide (SiO₂).

It is widely applied in pure water production for various industries:

• Drinking water production: Packaged water, direct drinking water, food processing water, etc.
• Purified water production: Pharmaceutical water, medical water, electronics water, etc.

Product Performance

Performance testing conditions:

• Operating pressure: 225 psi (1.55 MPa)
• Feed solution: 2000 mg/L NaCl
• Temperature: 25 ℃
• pH: 7.0 ± 0.5
• Recovery rate: 15%

Note: Each membrane element may have ±15% variation of permeate flow.

Operating limits

• Maximum operating pressure: 600 psi (4.14 MPa)
• Maximum feedwater temperature: 45 ℃
• Maximum inlet flow rate: 17 m³/h
• Maximum concentration of free chlorine: 0.1 mg/L
• Maximum pressure drop per element: 15 psi (0.1 MPa)
• Allowed pH range for feedwater in operation: 2-11
• Allowed pH range for chemical cleaning: 1-13
• Maximum feedwater SDI₁₅: 5

Feed water

• Allowed pH range for feedwater in operation: 2-11
• Maximum concentration of free chlorine: 0.1 mg/L
• Maximum feedwater SDI₁₅: 5

Mechanical / hydraulic

• Maximum operating pressure: 600 psi (4.14 MPa)
• Maximum inlet flow rate: 17 m³/h
• Maximum pressure drop per element: 15 psi (0.1 MPa)
• Packing carton dimensions (L:W:H): 1079 × 117 × 127 mm
• Connector material number: 3.02.09.0003

Important information

• Preservation: Dry membrane elements are shipped without preservation solution. Wet membrane elements use 1.0% sodium bisulfite (with 10% propylene glycol antifreeze in winter) as a preservation solution and are vacuum packaged.
• Storage: Dry membrane elements must be kept wet after initial soaking. Wet membrane elements not in use for extended periods require preservation solution.
• Initial Operation:
  • First, flush for 15-25 minutes at low pressure (do not soak overnight).
  • Then, flush for 60-90 minutes at high pressure (water flow should not be less than 50% of the system design flow).
  • Permeate and concentrated water produced within the first hour of initial operation must be discharged.
• Warranty: The operating limits and operational guidelines provided are part of the limitations for the three-year membrane element warranty.
• Chemicals: The addition of any chemicals that could affect the membrane element during storage or operation is prohibited. Vontron Technology disclaims liability for consequences arising from the use of such chemicals.
• Further Details: Refer to the Product Manual for detailed information on installation, commissioning, storage, and transportation.

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Disclaimer: This summary is based on extracted text and may not include all figures, footnotes, or the latest revisions. Contractual data must match the specific OEM PDF revision used for a project.

Official datasheet (PDF)

PDF datasheet