Vega VEGAPULS 63 - 4 Mounting Details; 4.2 Mounting and Sealing

16
4 Mounting
VEGAPULS 63 • Modbus and Levelmaster protocol
41364-EN-170711
You have to remove these plugs before electrical connection.
NPT thread
In the case of instrument housings with self-sealing NPT threads, it is
not possible to have the cable entries screwed in at the factory. The
free openings for the cable glands are therefore covered with red dust
protection caps as transport protection. The dust protection caps do
notprovidesucientprotectionagainstmoisture.
Prior to setup you have to replace these protective caps with ap-
proved cable glands or close the openings with suitable blind plugs.
4.2 Mounting instructions
The PTFE washer of the antenna encapsulation serves also as
process seal.
Afteracertaintimeundertheeectoflargetemperaturechanges,
PTFEplatedangestendtolosetheirpre-tensioning.Tocompensate
forthis,discspringsmustbeusedwiththeangescrews.
We recommended using elastic washers or detent-edged washers:
Screw size Disc spring type Article no.
M16,
5
/
8
" Detent edged ring
Gross VS KD
2.32880
M20,
3
/
4
" Detent edged ring
Gross VS KD
2.32881
M24,
7
/
8
" Retaining washer
Schnorr VS, S
2.32882
Note:
The retaining elements are included with the versions for process
temperatures -196 … +200 °C (-321 … +392 °F).
Tosealeectively,thefollowingrequirementsmustbefullled:
1. Makesurethenumberofangescrewscorrespondstothenum-
berofangeholes
2. Use of disc springs as previously described
1
2
Fig. 3: Use of disc springs
1 Disc spring
2 Sealing surface
3. Tighten screws with the necessary torque (see chapter "Technical
data")
Sealing to the process