Product description
Function description
10
© Lutz-Jesco GmbH 2018
BA-10407-02-V08
Motor-driven diaphragm dosing pump
MEMDOS LB
Operating instructions
4 Product description
4.1 Properties
The MEMDOS LB is a classic motor-driven diaphragm dosing pump used
when a control is not required to achieve constant dosing.
They are characterized by the following properties:
n
Suitable for accurate mixing tasks.
n
Performance range of 4 to 1020 l/h with a backpressure of 16 - 3 bar,
n
Reproducible dosing precision of ± 2 %,
n
Stroke length manually adjustable between 0% and 100%.
n
Suitable for use with frequency converters.
n
Wide range of dosing head materials.
n
With ATEX certification can be used in zones 1 and 2 explosion risk ar-
eas.
n
Leak-free.
n
Suitable for highly aggressive or poisonous dosing media,
n
Fitted with a separating chamber which helps preventing uncontrolled
dosing media escape in the event of a diaphragm rupture.
4.2 Scope of delivery
Please compare the delivery note with the scope of delivery. The follow-
ing items are part of the scope of delivery:
n
Dosing pump MEMDOS LB,
n
Operating instructions,
n
Motor operating instructions (only for MEMDOS LB dosing pumps with
explosion protection motors),
n
Electric servomotor and associated operating manual (optional),
n
Inspection report and test certificate (optional),
n
Accessory kit (optional).
4.3 Structure of the dosing pump
4.3.1 General Overview
Fig. 1: Dosing pump overview MEMDOS LB
No.
Description
1
Valve and connection on the discharge side
2
Dosing head
3
Valve and connection on the suction side
4
Oil level glass
5
Drive motor
6
Oil inlet and gearbox ventilation
7
Stroke length adjustment
8
Oil drain
Table 5: Designation of components
4.4 Function description
Dosing pumps are positive displacement pumps. They are used if pre-
cisely defined delivery of a medium is necessary. A constant volume per
stroke or time is delivered.
The system delivers or meters the dosing medium by means of a repeat-
ed sequence of suction strokes followed by pressure strokes. This results
in a pulsing flow.
1
3
2
5
6
7
8
4
