FPD350 Torbar
Averaging pitot tubes
2 Initial Installation
16
OI/FPD350–EN Rev. H
2.14 Threaded Model FPD350.H7.E2
Install the Torbar as follows:
1. Select the required insertion position and mark the pipe.
2. Drill a 6 mm (0.24 in) pilot hole at the marked position,
then drill to 28 mm (1.1 in).
3. Align the threaded fitting concentrically over the hole and
tack-weld in place.
4. Using a suitably sized and threaded length of pipe, check
the threaded fitting is concentric and aligned correctly –
see Fig. 2.2, page 4.
5. Weld the threaded fitting to the pipe.
6. Measure exactly 180° around the pipe circumference and
mark the pipe.
8. Referring to Fig. 2.13:
a. Apply suitable sealant to the close nipple
A
and
isolation valve
B
and fit them to the threaded fitting
C
. Tighten securely.
b. Ensure 6 packing rings are located correctly inside
packing gland
D
.
c. Ensure the drawbolt (or optional geared) retraction
assembly
E
is in the fully retracted position.
d. Fit pressure chamber
F
, complete with packing
gland
D
and retraction assembly
E
, to isolation
valve
B
, using appropriate sealants where
necessary.
e. Insert the Torbar into packing gland
D
.
f.
Turn the Torbar until the indentation marks on the
head are positioned downstream of the flow – see
Fig. 2.1, page 3.
g. Tighten the packing gland bolts
G
equally and
evenly until the packing gland is fully sealed,
ensuring the Torbar is able to slide through it.
h. Open isolation valve
B
.
i.
Drawbolt retraction assembly only
– turn each
drive-nut
H
clockwise alternately until the Torbar
passes through isolation valve
B
and protrudes
from the threaded fitting on the opposite side of the
process pipe by 25 mm (1.0 in). When the Torbar is
inserted fully, ensure the drawbolts
J
and stop
nuts
K
are in the positions shown.
j.
Drawbolt retraction assembly only
– tighten lock
nuts
L
.
k.
Optional geared retraction assembly only
– turn
the integral handle clockwise until the Torbar
protrudes from the threaded fitting on the opposite
side of the process pipe by 25 mm (1.0 in).
l.
Apply appropriate sealant to the threads of support
plug
M
.
m. Screw support plug
M
into threaded fitting
N
and
tighten, ensuring that it contacts the Torbar.
n. Fully tighten packing gland bolts
G
, ensuring the
Torbar does not turn. Check for leaks.
9. Check the Torbar is installed correctly and aligned.
10. Pressurize the process pipe and check for leaks.
Warning.
Threaded model FPD350.H7.E2 is supported in
the process pipe at the Torbar tip as well as at the entry
point into the pipe, therefore it cannot be 'Hot-Tap' installed.
Before drilling into the pipe, reduce the pipe pressure to a
safe level and remove all hazardous material. Before
inserting the probe, you must also stop the flow completely,
to ensure that the probe can correctly engage with the end
support.
Note.
During step l, turn drive nuts
H
equally and
evenly to prevent binding.
Note.
The gear retraction handle is supplied loose
and can be fitted to either side of the gears.
However, ensure the handle is fitted so that the
Torbar is inserted when the handle is turned
clockwise.
