Pipe Component And Weld-On Adapter With Ball Valve - ABB FMT400-VTS Operating Instruction

Thermal mass flowmeter

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Commissioning instructions (32 pages)

Commissioning instructions (264 pages)

Table Of Contents

Table of Contents

4.6.2

The ball valve version allows you to mount and dismount the transducer even with low overpressure in the pipe

letting very little gas escape.

The weld-on adapter is mounted as described in chapter 4.6.1.

NOTICE

When welding, it must be ensured that the seals in the ball valve do not overheat.

In there is any doubt, the ball valve must be removed before starting the welding.

When mounting and dismounting the transducer always make sure that the gas pressure inside the pipe is not

as high that the transducer is pressed out of the pipe component or weld-on-adapter. We recommend to use the

integrated hot tap fitting for gas pressures above 1.1 bar abs.

Fully open the ball valve before mounting the transducer. Fit in the appropriate gasket, thoroughly center the

transducer and fasten it.

Prior to dismounting the transducer always check that the pipe is depressurized or that the pressure in the pipe

is low enough to ensure safe dismounting. Only then undo the 4 screws on the DN 25 flange, dismount the trans-

ducer and close the ball valve.

NOTICE

Do not close the ball valve before removing the transducer. Otherwise. the ball may considerably dam-

age the cage or the sensor elements.

Weld-on adapter with ball valve for FMT400-VTS (Sensyflow VT-S)

(1)

(2)

(1) Centering pin on outlet side

(2) ball valve DN 40

D Pipe diameter (outside)

Fig. 4-3

42/14-36 EN

Thermal Mass Flowmeter FMT400-VTS, FMT400-VTCS (Sensyflow VT-S/VT-CS)