Integrated Hot Tap Fitting For Fmt400-Vts (Sensyflow Vt-S); Technical Data For Integrated Hot Tap Fittings - ABB FMT400-VTS Operating Instruction

4.7

Integrated hot tap fitting for FMT400-VTS (Sensyflow VT-S)

WARNING
Safety instructions
!
When dismounting, with more than 1.1 bar absolute pressure, or with high temperatures or health-
hazardous gases in the pipe, the use of the exchange tool is recommended and obligatory for safety
reasons.
Non-observance may lead to severe injuries of persons.
lock nut
Fig. 4-4
The integrated hot tap fitting is used instead of the pipe component and weld-on adapter assembly described
above if the sensor must be exchangeable during operation with virtually no gas escaping from the system.
It is recommended to use the hot tap fitting for measurements in main conduits (e.g. compressed air systems)
or for measuring points which otherwise require rinsing prior to removing the sensor. As a rule, hot tap fittings
should be preferred for all systems where, otherwise, the entire system or parts of it must be switched off to
replace a sensor.
18 Thermal Mass Flowmeter FMT400-VTS, FMT400-VTCS (Sensyflow VT-S/VT-CS)
Covers for
DN 25 flange
A
Wafer flange version – sensor
in exchange position
Integrated hot tap fitting, wafer flange and weld-in versions
Detail A
0 - CLOSE - ZU
10
20
30
40
50 - OPEN - MESSEN
B
Detail B
Weld-in version – sensor
in measuring position
Transducer length h for wafer flange version
h = 263 mm for DN 50 and DN 80
h = 425 mm for DN 100, DN 150 and DN 200
Mounting and installation
Bottom edge of lock nut
Indication of sensor position
(50 mm stroke)
Transducer length h
for weld-in version
is always 425 mm
50
O-ring seal
42/14-36 EN