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By-pass module

Flow rates in the nanoliter range starting at 1 µl/h

With the by-pass module constant small flow rates reaching the nanoliter range can be obtained. The technology bases on the partitioning of flow according to the relationship of the fluidic resistance of two capillaries. The flow is generated by a micro annular  gear pump and shows a very good constancy and little pressure dependence. This technology creates an almost pulsation-free master circulation, from which a side current is derived. Smallest flow rates starting at 1 µl/h can be achieved. Depending on the differential  pressure and flow rate range an adjusting range of 1:100 may be obtained. The lower limit of flow rate is defined by tuning of the two capillary tubes and can be adjusted according to customer's needs from 1 to 10,000 µl/h.

Advantages

  • Flow rate in Nanoliter range
    flow rate from 1 µl/h to 10 ml/h
  • Wide flow rate range
    small-volume dispensing with a adjusting range maximum 1:100
  • Low-pulsation delivery
    damped flow
  • Pressure resistance
    generation of pressure up to 3 bar
  • Customized system
    for use with micro annular gear pumps mzr-2521 M2.1, mzr-2921 M2.1, mzr-2542 M2.1, mzr-2942 M2.1 or mzr-4622 M2.1
  • Analytical instrumentation
  • Flow chemistry
  • Lubrication
  • Biotechnology

Micro annular gear pump mzr-4622

pump of the low pressure series,
it covers the flow rate range 0.012 to 72 ml/min,
for continuous and discrete dosing

Micro annular gear pump mzr-2942

pump of the modular series,
it covers the flow rate range 0.003 to 18 ml/min,
for continuous and discrete dosing

Micro annular gear pump mzr-2921

pump of the low pressure series,
it covers the flow rate range 0.003 to 18 ml/min,
for continuous and discrete dosing

Micro annular gear pump mzr-2542

pump of the modular series,
it covers the flow rate range 0.0015 to 9 ml/min,
for continuous and discrete dosing

Micro annular gear pump mzr-2521

pump of the low pressure series,
it covers the flow rate range 0.0015 to 9 ml/min,
for continuous and discrete dosing
Flow rate 1 – 10,000 µl/h
Viscosity range 0.3 – 100 mPas
Pulsation < 1 %
Fluid connection capillary fittings 1/4"-28 UNF;
feed line: tubing, OD 1/8“;
master capillary: tubing, OD 1/8“;
secondary capillary: tubing, OD 1/16“
Wetted parts by-pass manifold adapter stainless steel 316L, optional: PEEK™; fittings and tubings: ETFE, PEEK™
Dimensions (L x W x H) 32 x 25 x 25 mm (By-pass block without pump)
Weight approx. 160 g (version 316L without pump)
approx. 50 g (version PEEK™ without pump)
Adjustment range 1 : 100
Differential pressure range 0 – 3 bar
Maximum inlet pressure 1 bar
Operating temperature range -20 ... +60 °C
Remark subject to technical changes
File Language Size
By-pass module
By-pass module (72 KB)
Bypassmodul (72 KB)
Module de dérivation pour dosage de l'ordre du nanolitre (87 KB)
72 KB