Page 295 - Bürkert

Micro Dosing Unit

7615 • Diaphragm Pump

• Self priming
• Precision Dosing

• Pumps in both Directions
• Integrated Electronics, easy to use

Bürkert’s Micro Dosing Unit has been designed for precise dosing ap- Dimensions [mm] Flange version
plications in the microliter range.

It combines high dosing accuracy and precision with excellent chemical
inertness. The unit is comprised of three valves which can be opened si-
multaneously for flushing. Active inlet and outlet valves enable the device
to pump liquid in two directions. This feature can be used to mix fluids
inside a tube or channel or to constantly keep them in motion.
Even low ambient temperatures and dry runs are no problem: the inte-
grated heating function heats up the valves and the media, and the unit
comes along with dry running capabilities.

Technical Data
C
Body Material PEEK
Seal Material FFKM; EPDM on request
Fluids Neutral and aggressive liquids
(see Chemical Resistance Chart)
Fluid Temperatures +15 to 60 °C (FFKM)
+5 to 60 °C (EPDM) 1)
Ambient Temperature +10 to +55 °C 1) B
Dosing Quantity 5 µl/Hub; max. 8 ml/min in both directions A
Pump Frequency 5 Hz (Standard)
(Frequency Mode) 10 Hz; 25 Hz; 40 Hz
Length of Voltage Impulse > 120 ms
(Impulse Mode) A B C
Accuracy < ± 2% 2) 44.8 40 70.4
Max. Outlet Pressure 1.0 bar 3)
Max. Suction Lift > 2 m (dry); > 4 m (wet)
Duty Cycle 100%
Voltage 12 V/DC, 24 V/DC
Voltage Tolerance ± 10%
Power Consumption 11 W (short term); 5 W
Electrical Connection 4-pin Molex-Plug (Molex no. 50-57-9404)
(not included)
Installation variable, unit with two holes for M3 fixing
screws
Fluid Connection Flange, UNF ¼-28 internal thread
Protection class IP40
Lifetime ca. 20 Mio cycles
(at 20 °C; 10 Hz; water)
Dimensions (L x W x H) 50 x 28.5 x 70 mm (UNF ¼-28)
44 x 39.5 x 70 mm (Flange)
Max. Viscosity < 250 mm²/s 1) For lower temperatures the unit can be electrically preheated (heating mode)
2) At 20 °C; 5 Hz; Medium water and without back pressure.
Weight ca. 120 g 3) Overpressure above atmospheric pressure

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