Stübbe Series MDM 902, Original Operating Manual

Page: 7 / 12

Installation and connection
5 Installation and connection
5.1 Preparing for installation
5.1.1 Check operating conditions
1. Ensure the design of the fi tting is consistent with the pur-
pose intended:
–
Materials used ( → Type plate).
– Medium( → Order and design data).
2. Ensure the required operating conditions are met:
– Resistance of the materials of the body, separation
diaphragm and seals to the medium (
→ Resistance
list).
– Media temperature ( → Data sheet).
– Operating pressure ( → Data sheet).
3. Consult with the manufacturer regarding any other use of
the device.
5.1.2 Check the installed condition of the fi tting
Check the installed condition of the fi tting and depending
on the situation proceed as follows:
–
Fitting not fi lled with the transmitter fl uid, pressure
gauge not fi tted: Install fi tting ( → 5.3 Installing the
fi tting, Page 7 ).
– OR –
– Fitting fi lled with the transmitter fl uid, pressure gauge
fi tted: Installing fi tting in pipe ( → 5.4 Installing fi tting in
pipe, Page 8 ).
5.2 Planning pipelines
WARNING
Risk of poisoning and environmental damage from
medium.
Leaks due to impermissible pipework forces.
Ensure that the fi tting is not subject to any pulling or thrust-
ing forces or bending moments.
1. Plan pipes safely:
– No pulling or thrusting forces
– No bending moments
– Adjust for changes in length due to temperature
changes (compensators, expansion shanks)
– Optional fl ow direction
– Optional installation position and direction
2. Dimensions ( → Data sheet).
5.3 Installing the fi tting
Before installation in the pipeline, the fi tting must be fi lled
and the pressure gauge must be fi lled and mounted.
Follow the section drawing for assembly ( → 9.5 Sectional
drawing, Page 12).
Use the recommended transmitter fl uid ( → 9.3 Transmitter
fl uid, Page 12).
5.3.1 Fill the fi tting
1. Fill the upper part (2) with transmitter fl uid (4), excluding
any air bubbles.
2. Insert the gasket (5) into the upper part (2).
The fi tting must be fi lled and prepared for assembly to the
pressure gauge.
5.3.2 Installing and fi lling the pressure gauge
The fi tting must be fi lled
The compressed air supply must be available
NOTE
Damage to the separation diaphragm due to lack of trans-
mitter
fl uid!
Before commissioning, make sure that the fi tting is suf fi -
ciently fi lled with transmitter fl uid.
NOTE
Damage to the separation diaphragm due to compressed
air!
Apply compressed air to the fi tting only for very short peri-
ods of time. When doing so, do not exceed the permissible
pressure of the pressure gauge that is used.
1. Screw the pressure gauge (1) clockwise into the upper
part (2) ( → 9.4 Tightening torques, Page 12).
2. Rotate the fi tting until the pressure gauge (1) is facing ver-
tically downwards.
3. Connect the compressed air supply to the bottom sec-
tion (6).
4. Switch on the compressed air supply and apply com-
pressed air to the fi tting for short periods of time.
The transmitter fl uid is pushed into the pressure gauge.
5. Switch off the compressed air supply and carefully detach
it from the fi tting.
6. Rotate the fi tting until the pressure gauge (1) is in the
upright position.
7. Unscrew the pressure gauge (1) from the upper part (2).
301 287 BA-2017.09.21 EN MDM 902 7