Technical Data - gefran 85180 User Manual

TECHNICAL DATA

Extrusion processes require very high
temperatures. Extrusion pressure can
be checked by means of especially
designed transducers.
Transducers M and W are configured
to measure pressure with high
temperatures and work with the
principle of hydraulic pressure
transmission from a front (contact)
diaphragm to a sensitive element
(strain gauge device) located in a
thermally non-critical zone.
The most delicate part of the
transducer is the diaphragm in contact
with the measurement means.
Useful advice for extending the life of
transducers:
a) Avoid knocks and abrasions of the
contact diaphragm.
Protect the transducer with its cover
each time you remove it from its
MECHANICAL DIMENSIONS OF TRANSDUCER
INSTRUCTION AND MAINTENANCE MANUAL
PRESSURE TRANSDUCERS / TRANSMITTERS FOR
HIGH-TEMPERATURE APPLICATIONS
housing.
b) The housing must be prepared
perfectly and with appropriate tools in
order to respect the depth and axiality
of the holes and tappings.
Pay particular attention to the
coaxiality of the holes to the thread,
because diaxialities greater than 0.2
mm will break the transducer during
assembly.
It is essential that hole depth
guarantee the absence of chambers or
air pockets in which extrusion material
may be trapped.
To prevent contact with the extrusion
screw or with tools used to clean the
extrusion chamber,
diaphragm must not extend from the
inner wall of the extruder.
c) Before assembling the transducer in
machines already in operation, make
sure that the housing is clean.
Remove any residue with the
A
C
B
E
Technical Data
• Using the transducer
• The transducer mounting hole
• Transducer installation
• Cleaning the housing and the transducer
• Rules to follow for correct functioning of the measure-
ment chain
appropriate cleaning device.
d) The transducer should be removed
only with the machine empty (without
pressure) but still hot.
Any solid matter attached to the
contact diaphragm could break it.
e) The transducer should be cleaned
with solvents for the material being
processed.
Any mechanical action on the contact
diaphragm modifies its operation and
could break it.
the front
1/2-20UNF-2A
D1
ø 7.8
D2 -0.05
ø 10.5
D3 -0.025
ø 10.67 [ø 0.42"]
D4
ø 12.7 [ø 0.5"]
D5
5.56
A -0.26
11.2 [0.44"]
B
15.74 [0.62"]
C
16 [5/8"]
CH
152.4 [6"]
E
NOTE:
Dimensions refer to option "4" of the rigid rod (153 mm - 6").
ATTENTION:
Use a maximum tightening torque of 56 Nm (500 in-lb) for installation.
5
M18x1,5
[ø 0.31" ] ø 10 [ø 0.394"
-0.002 -0.005
[ø 0.41" ] ø 16 [ø 0.63"
-0.001 -0.08
ø 16 [ø 0.63"
-0.4
ø 18 [ø 0.71"]
[0.22" ] 6 [0.24"
-0.01 -0.26
14.8 [0.58"
-0.4
19 [0.75"]
19 [3/4"]
152.4 [6"]
]
-0.002
]
-0.003
]
-0.016
]
-0.01
]
-0.016