5 Optional modules
Operating manual mzr-2521 and mzr-2921
Last update: June 2019
Technical data subject to change without prior notice!
19
5.1
Gear box module (optional)
The gear box module enables to operate the pump at very low speeds and
increases the torque of the motor for the delivery of highly viscous liquids or for
application with increased operating pressure. The gear box module is available
with the following reductions: 4.1 : 1, 17 : 1, 67 : 1 and 275 : 1 in combination
with the pump heads mzr-2521 and mzr-2921. The length of a micro annular
gear pump with the gear box module increases by 16 mm to 28 mm (see
table 7). For pumps with the gear box module the position of the slip fittings to
the connection cable is undetermined.
pump head
motor with
encoder
10-pole
connector
connection
cable
reduction gear
fluid connectors
figure 12
Micro annular gear pump mzr-2921 with the gear box module
figure 13
Measurements of the micro annular gear pump mzr-2521 or mzr-2921 with the gear box module
Gear reduction
Length of the gear box Total length of the
pump L1
Weight of the gear box
4.1 : 1
16.1 mm
96.1 mm
11 g
17 : 1
20.0 mm
100.0 mm
14 g
67 : 1
23.8 mm
103.8 mm
17 g
275 : 1
27.7 mm
107.7 mm
20 g
table 7
Measurements of the gear box modules
Gear reduction
Max. pump speed
(recommended max. motor speed 8000 rpm)
4.1 : 1
1950 rpm
17 : 1
470 rpm
67 : 1
119 rpm
275 : 1
29 rpm
table 8
Maximal pump speed with the gear box modules
