25
4 Mounting
NCR-84 Two-wire 4 … 20 mA/HART
51141-EN-181127
Note:
We recommend re-tightening the screws at regular intervals, depend-
ing on process pressure and temperature. Recommended torque, see
chapter "
Technical data
", "
Torques
".
The PTFE washer in 8 mm version can be exchanged by the user in
case of wear or damage.
Proceed as follows while dismounting:
1. Dismount and clean the instrument, note chapters "
Dismounting
steps
" and "
Maintenance
"
2. Loosen the PTFE washer manually and detach it
Fig. 20: VEGAPULS 64 - Loosening the PTFE washer
Note:
Protect the thread against contamination
3. Remove the sealing and clean the sealing groove
4. Insert the supplied new sealing, place the PTFE washer onto the
thread and tighten it manually
5. Mount the sensor, tighten the flange screws (torque see chapter
"
Technical data
", "
Torques
")
Note:
We recommend re-tightening the screws at regular intervals, depend-
ing on process pressure and temperature. Recommended torque, see
chapter "
Technical data
", "
Torques
".
PTFE threaded adapters are available for VEGAPULS 64 with thread
G1½ or 1½NPT. Due to this, only PTFE is in contact with the medium.
Mount the PTFE threaded adapter in the following way:
Exchange, flange plating
Mounting, PTFE threaded
adapter
925-0373 Rev A