Bundle D20

Polypropylene hollow fiber membrane bundle is a flexible building system for immersed units.

Standard membrane bundle has 1380 fibers (P60 type) potted with polyurethane in PVCu pipe d20mm. Total length (including potting) is 750mm. PVCu potting can be glued in to any d20mm PVCu fitting.

This alows easy modular design and simple testing rigs. Active membrane surface is calculated form outer surface as it is usually used for outside /in filtration mode. For standard membrane module P60-750mm it is 0.9m2 .

OD of the membrane fibre is suited for low lumen permeate speeds - lower transmembrane pressures - larger active filtration surface. Pressure drop along the lumen of the fiber can be concern in contactor applications, where liquid flows in the fiber. Shorter fibers or large OD fibers (P80) should be used.

Modular solution to frame and module production, simple scale-up
Easy lab and pilot testing
Easily defect and repair integrity problems
Length of the membrane bundle can be easily customized from 10 to 150cm

Characteristic

Membrane Type		P60 (1385 fibers)	P80 (505 fibers)
Membrane	Material	Polypropylene (natively hydrophobic)
	Pore size	average 0.1 μm
	OD/ID	310/240 μm	530/440 μm
	Burst / Collapse pressure	>5.5 / >3.5 bar
Module	Active Membrane Surface	0.97 m²	0.35 m²
	Priming Volume Shellside	x ml	x ml
	Priming Volume Lumenside	ml	ml
	Housing Material	PVCu gray
	Potting Material	Polyurethane
	Shell pressure	< 5 bar
	Temperature	< 45°C
	Ports	D20 PVCu pipe
	Dimensions	D20 - 750mm
	Weight	??g

① food grade, no additives PP is used, but due to production small amounts of other materials might be used, please consult us for chemical resistance

Possible Applications

Gas transfer, microporous hollow fiber membrane is used so gas/liquid or liquid/gas
Gas filtration - gas/solids separation on microfiltration level
Membrane degassing - lab, OEM applications
Filtration industry, lab, medical
Testing pilots

Applications Notes

Ports are plastic, excessive tightening moments and forces will cause breakage. For parallel thread liquid seal (LOCTITE 5331) is preferred, if joint should be often disassembled O-rings are also suitable. Suitable push-in fittings for pipe d6 or d8mm can be supplied.
Try to avoid temperature shocks, slow change is preferable. For contactor (liquid / gas, degassing) applications temperature gradients might cause condensation inside the pores, wetting and module bleeding. When this happens thorough drying (dry air @50°C at least 24 hours) will restore the module.
No oxidizing chemistry or UV light – PP membrane is very sensitive. For chemical cleaning use standard NaOH / citric acid procedure.
Chemical resistance can be estimated from used materials PP, PVCu, polyurethane, usually least resistant is potting - polyurethane.