7 System integration
Operating manual mzr-7240
Last update: March 2019
Technical data subject to change without prior notice!
43
Clean the internal and external
screw threads leaving no residues.
Make sure the internal and
external screw threads are not
dented or deformed.
Wrap the PTFE tape around the screw
thread clockwise beginning with the
second pitch of screw thread..
The PTFE tape should be wrapped
tightly around the screw thread
approx. two times (720°).
Cut the PTFE tape off and wind
the end of the tape tightly around
the screw thread.
The PTFE tape should not stick out over
screw thread because pieces can be
cut off and get into the system.
table 27
Use of PTFE Tape
10.
Cut the tube or hose to the right angle with an adapted hose cutter. Metal
tubing, that produces swarf during cutting must be throughoutly cleansed
and flushed. The smallest piece of swarf in the liquid delivery system may
cause failure of the micro annular gear pump.
11.
Screw the tube or hose (the latter always with a support tube) in the fluid
inlet/outlet port of the pump first manually then tighten it with 1¼ wrench
turns. During this operation use a second wrench to hold the hose against
the bottom of the inlet/outlet port.
12.
Operate the micro annular gear pump always with a filter with a pore size
of 10 µm or smaller. The filter prevents that particles or solids penetrate
into the pump what can cause major damage.
13.
Avoid dry running of the pump. Make sure that the liquid flow is not
interrupted.
