1, PERFORMANCE PARAMETERS		Seven - hole
Membrane Material		PVC
Molecular Weight  Cut-off     (MWCO)		100,000 Daltons
Inner and outer diameters  of hollow-fiber		0.9mm/4.2mm
Membrane fiber type		Inside-out hollow-fiber
Characteristics of  membrane structure		Hydrophilic double-compact layers
External Shape		Hollow fiber
2, APPLICATION CONDITIONS
Pre - filtration		50-150 um
Max turbidity of  inlet water		≤ 15 NTU
Rated flux		60 – 160 L/M2/H/0.1Mpa
Running mode		Cross-flow filtration or dead end filtration
Max inlet water pressure		0.7Mpa
Pressure difference of  transmembrane at 20°C (TMP)		28 – 150 KPa
Max pressure difference  of transmembrane		0.2 MPa
Applicable PH range		2 – 12
Applicable temperature		5 °C - 45 °C
Tolerable continuous  residual chlorine		100 PPm
Tolerable interval  residual chlorine		200 PPm
3, BACKWASHING DESIGN
Backwashing pressure		0.25 MPa
Backwashing flow		220 – 300 L/M/H
Backwashing frequency		Every 20 -60 minutes
Backwashing time		30 – 60 seconds every time
Frequency of chemically  enhanced ( CEB )		Auto adding of additives in  backwashing is recommended.
Time of chemically enhanced  backwashing ( CEB )		30 – 60 seconds every time
4, CHEMICALLY WASHING DESIGN
Frequency of chemically washing		Every 1~4 months or when TMP is over 0.15 MPa
Pressure of chemically washing		0.15 MPa
Flow of chemically washing		200 – 250 L/M/H
Time of chemically washing		60 – 90 minutes every time
Acid washing chemical		Citric acid or oxalic acid  ( mixed into solution with PH = 2 )
Alkali washing chemical		NaOH ( mixed into solution with PH=12)
5, INDEX OF OUTPUT WATER
Turbidity of output water		< 0.1 NTU
Index of silt density		< 1.5
Microorganism, pathogen		99.99 % Removed
Remarks:		1. Pure water flux is measured with pure water at 25°C with inlet water pressure of 0.1MPa.
		2. If water are from surface water,river water or well water and so on, pre-treatment shall be done. It is suggested that a 50-150 um precision filter  shall be equipped to have inlet water with turbidity ≤15NTU.