Stepping motor diaphragm metering pump FEM 1.02 / FEM 1.09
Assembly and function
KNF Flodos AG BA_FEM1-02_1-09_EN_07_157639.docx
Translation of Original Operating and Installation Instructions
10
FEM … -Version (standard version)
This pump type represents this product in its simplest form and is intended for
continuous delivery at an exact delivery rate.
FEM … .27-Version (with overpressure limitation)
If the metering pump is operating against a closed system, the delivery pres-
sure quickly exceeds the maximum permissible values. To prevent this hap-
pening, an overflow valve is integrated in the top part of the pump head. If the
pressure exceeds the variable limit range (min. 0.5 to max. 6.0 bar
g
), the
valve opens and the liquid circulates from the pressure side to the suction side
via an internal bypass system. This prevents any further rise in pressure.
FEM … .55 version (with single-stroke metering)
The .55 version was specially developed for the KNF stepping motor partial
stroke controller FE Z5. The pumps have a Hall effect sensor for determining
the position of the diaphragms. This is needed during partial stroke metering
or with customer-specific operating profiles.
Please note:
The FEM … .55 is compatible with KNF controllers FE Z4
and FE Z5.
The FE Z5 stepping motor partial stroke controller from
KNF can only be used in combination with the FEM ... .55.
FEM … .55 RC version (single-stroke metering incl. controller)
In the .55 RD version the FE Z5 stepping motor partial stroke controller from
KNF is integrated in the pump and is supplied as a single unit.
Detailed information can be found in the relevant operating instructions.
The stepping motor controllers from KNF are available as accessories, see
accessory list in chapter 10. Two different controllers are available.
Stepping motor controller FE Z4 2-phase stepper
standard controller, single speed controller for variable delivery volume,
pulse input for maximum programming capability etc.
Stepping motor partial stroke FE Z5 Dispense
partial stroke controller, partial stroke metering using potentiometer or an-
alogue signals possible, alarm output etc.
More information about the functionality of the KNF controllers FE Z4 and FE
Z5 can be found in the relevant operating instructions.
FEM ...
FEM ... .27
FEM … .55
FEM … .55 RC
KNF stepping motor
controller
