KrosFlo® Perfusion Flow-Path Assemblies
Single-Use Tangential Flow Filtration
  • Ready-to-Use, Single-Use and Sterile
  • Low shear magnetic levitating pump
  • Scalable from 2L to 2000L
  • mPES Hollow fiber filters-low protein binding and high mass transfer
  • Simple and fast set-up
  • Non-invasive flow-path with in-line pressure sensors

Spectrum's TFF assemblies for bioreactor perfusion are ready-to-use, single-use and gamma sterilized. With the elimination of autoclaving setup time is reduced to minutes from hours compared to existing perfusion technologies. The perfusion flow paths are scalable from 2L to 2000L working volumes. The patent pending design incorporates a low shear, levitation magnetic pump that is single-use and sterilized with the complete assembly. These single-use pumps reduce the risk of contamination due to their self-contained design. Unlike peristaltic pumps, they are pulsation-free and low shear with no particle generation and no impact on cell viability based upon process configuration within each system.

The assemblies also include Spectrum's hollow fiber filters with the advanced modified polyethersulfone (mPES) membrane chemistry. mPES hollow fiber filters provide high mass transfer with low protein binding. The hollow fiber filters used in the assemblies are available with 0.5mm, 0.75mm, or 1.0mm lumens and with pore sizes for both microfiltration and ultrafiltration. The perfusion assemblies can be used to achieve cell counts over 100 x 106 cells/ml. The KrosFlo assemblies also include flexible tubing and in-line polysulfone pressure transducers for monitoring feed, retentate and permeate pressures.

The novel design of these disposable sterile assemblies with the single-use pump, hollow fiber filter, in-line flow meter, tubing and pressure transducers give excellent perfusion results with minimal setup time. If necessary they can be replaced during operation. The KrosFlo Perfusion Assembly designs can be used in either scale up or scale down applications. They can be used with either disposable or reusable bioreactors with capacities ranging from 2L to 2000L. The KML 100 and KPS 200 series systems are configured for a low shear, levitating pump that is designed to operate below the limits of its maximum pressure differential of 2.6 bar (37.7 psi) and maximum flow rate of 21 LPM. The operation conditions for these systems are based upon flow rates less than 4 LPM at a pressure drop of less than one bar (14.5 psi) to limit any impact on cell viability when utilizing these systems. The KPS 600 system's pump is designed for a maximum pressure differential or 3.2 bar (46.4 psi) and maximum flow rate of 75 LPM. The operating conditions to prevent cell viability impact for the KPS 600 are based upon flow rates up to 45 LPM at a pressure drop of less than one bar (14.5 psi).

Filter setup

KrosFlo Perfusion System (KML 100 KPS)

Sterile Disposable Perfusion Flow-Path

0.5mm Lumen ID Hollow Fiber:
Bioreactor Size (Liter) Module Area (m2) Recirculation (LPM) System Retentate Shear Rate Range (Sec-1) Suggested Module Series

2 to 5

0.08

0.1 - 0.38

KML 100/KPS 200

500 - 2000

Sampler /S02-

10 to 25

0.26 - 0.31

0.32 - 1.55

KML 100 / KPS 200

500 - 2000

MiniKros® /N02-

30 to 50

0.54 - 0.65

0.32 - 1.55

KML 100 / KPS 200

500 - 2000

MiniKros® /N04-

60 to 100

0.85 - 1.0

0.32 - 1.55

KML 100 / KPS 200

500 - 2000

MiniKros® /N06-

125 to 200

1.25 - 1.6

1.5 - 6

KPS 600

500 - 2000

KrosFlo® /K02-

250 to 500

2.6 - 3.25

1.5 - 6

KPS 600

500 - 2000

KrosFlo® /K04-

750 to 1000

9.5 - 12.5

4.6 - 18.5

KPS 600

500 - 2000

KrosFlo® Max /X04-

2000

9.5 - 12.5 (x) 2

9.2 - 37

KPS 600

500 - 2000

KrosFlo® Max /X06-

0.63 - 1.0 mm Lumen ID Hollow Fiber:
Bioreactor Size (Liter) Module Area (m2) Recirculation (LPM) System Retentate Shear Rate Range (Sec-1) Suggested Module Series

2 to 5

0.047 - 0.053

0.23 - 0.95

KML 100 / KPS 200

500 - 2000

Sampler /S02-

10 to 25

0.31 - 0.33

0.75 - 3.0

KML 100 / KPS 200

500 - 2000

MiniKros® /N04-

30 to 50

0.48 - 0.51

0.75 - 3.0

KML 100 / KPS 200

500 - 2000

MiniKros® /N06-

60 to 100

0.78 - 1.0

3.7 - 14.8

KPS 600

500 - 2000

KrosFlo® /K02-

125 to 200

1.55 - 1.65

3.7 - 14.8

KPS 600

500 - 2000

KrosFlo® /K04-

250 to 500

2.43 - 2.55

3.7 - 14.8

KPS 600

500 - 2000

KrosFlo® /K06-

750 to 1000

5.2 - 7.1

9.9 - 40

KPS 600

500 - 2000

KrosFlo® Max /X04-

2000

5.2 - 7.1 (x) 2

9.9 - 40 (x) 2

KPS 600

500 - 2000

KrosFlo® Max /X06-

for more information:

call Customer Service at (800) 634-3300 (toll-free US and Canada) • (310) 885-4600 (world-wide) email us at customerservice@spectrumlabs.com or submit the form by clicking on the request info button

View desktop version: Desktop