Nanofiltration membrane element  
"SURO NF30-8040/4040、NF90-8040/4040"

· Introduction

The membrane element has a strong selective retention ability for low-priced and high-priced ions and a very low operating pressure. It is widely used in purification and desalination of drinking water, concentration and separation of sugars, various amino acids and organic acids etc.. It is suitable for surface water, waste seepage, printing and dyeing wastewater desalination or dehydration treatment. It can also be widely used in medical extraction, salt chemical industry, material concentration and other fields.

· Product specification
ModelEffective membrane area ft²(m²)Flux GPD
MgSO4 Rejection
NaCl Rejection
SURO NF30-8040400(37.2)14000(52.9)≥97≤30
SURO NF30-404085(7.9)3200(12.1)≥97≤30
SURO NF90-8040400(37.2)14500(54.8)≥9885-95
SURO NF90-404085(7.9)3500(13.2)≥9885-95

· Test conditions
Test liquidWater temperature(℃)pHOperating pressure psi(MPa)Recovery rate (%)
MgSO4 solution (2000 ppm)
NaCl solution (500 ppm)

Notes:The permeate flow of single membrane element may vary with in±15%.

· Limit operating parameter
Maximum operating pressure600psi(4.14MPa)
Maximum inlet temperature45℃
Maximum inflow rate17.0m³/h(8040)、3.6m³/h(4040)
Maximum inflowSDI155.0
Maximum residual chlorine concentration0.1mg/L
pH range of inlet water in continuous operation2-11
PH range of inlet water during chemical cleaning1-13
Maximum transmembrane pressure difference for single membrane element15psi(0.1MPa)