Initial Installation; General - ABB FPD350 Torbar Instructions Manual

FPD350 Torbar
Averaging pitot tubes

2 Initial Installation

2.1 General

The differential pressure generated by the Torbar exits at the
high- and low-pressure connections on the head of the device.
The connections are identified by the letters L (low pressure) and
H (high pressure).
The direction of flow is indicated by the small indentations on the
head – see Fig. 2.1. The indentations must be positioned on the
downstream side of the flow and are clearly visible from various
directions and distances. Exceptions to this are Models
FPD350.T1.T1/W1/F1 and FPD350.T5, and Direct Mount Head
options.
In addition, an arrow is stamped on the head of all Torbar
models to indicate direction of flow.
OI/FPD350–EN Rev. H
H
High Pressure
Indentations on 3 sides
(standard horizontal pipe arrangement)
H
Optional arrangement for
steam/liquids in vertical pipes
(Option PNV and RNV)
Fig. 2.1 Torbar Head Flow Alignment Marks
To prevent noisy signal outputs, do not install Torbar in a
pulsating flow. Vibration also distorts the output signal and
affects the structural limits of Torbar.
2 Initial Installation
Flow
L
Low Pressure
Flow
L
3