Yokogawa RotaMASS 3-Series User Manual

Page 31

4. INSTAllATION

4-3

IM 01R04B04-00E-E 8th edition March 01, 2011 -00

Use shut-off valve and bypass line
To facilitate zero adjustment and maintenance, providing a bypass line is recommended.

Supporting the Coriolis flowmeter

- Please prevent the detector from pipeline stretching, vibration or shock.
- Please prevent the detector from direct fixing. (See figure below.)

Please prevent the detector from direct fixing. (See figure below.)

- Please fix the pipe at first and support the detector with piping. (See figure below.)
- Please fix only one side of the detector instead of both sides so as to minimize mechanical stress to the
detector.

vertical installation (recommended):
Makes pipe easier to empty (in case of maintenance, start-
up, product change). Helps gas bubbles to escape.
Only one shut-off valve is required to ensure “no flow” for
setting Autozero.

Horizontal installation :
For liquids: Measuring tube downwards so that no gas can
collect if “no flow”.
For gasses: Measuring tube upwards so that no liquid can
collect if “no flow”.

Installation at highest point of a piping system:
Avoid it, as this can lead to collection of gas bubbles.

Installation with pressure below 1 bar abs:
Avoid it, as suction can draw air into the measuring tube,
leading to incorrect measurements. Free outlets to contain-
ers or vessels can generate low pressure by earth gravity
acceleration.

F41.EPS

Flow

F0301.ai

Bypass valve

Coriolis ﬂowmeter

Shut-off

valve

Shut-off

valve

WARNING

• Do not stress the detector mechanically. Fix the pipe not on both ends of the detector but only at one

side. Let the other side run free for minimum mechanical stress on the detector.

• Please use the standard reducers if the piping’s cross- section differs at the inlet or outlet point of the

flowmeter.