FPD350 Torbar
Averaging pitot tubes
3 Torbar Removing and Refitting
28
OI/FPD350–EN Rev. H
3.5 Flanged models FPD350.(H6/H7/H8)
3.5.1 Removing
Referring to Fig. 3.2:
1. Slacken packing gland bolts
A
evenly and just sufficiently
to enable the slow, controlled exit of the Torbar.
2.
Drawbolt retraction assembly only
– Loosen lock nuts
B
and turn drive-nuts
C
counter-clockwise alternately
until the Torbar passes through isolation valve
D
. Ensure
the retraction assembly is in the fully retracted position
E
.
3.
Geared retraction assembly only
– turn the integral
handle counter-clockwise until the Torbar passes through
isolation valve
D
).
4. Close isolation valve
D
.
5. Slacken packing gland bolts
A
slowly to release the
pressure in pressure chamber
F
.
6. Remove the Torbar completely if required.
3.5.2 Refitting
Referring to Fig. 3.2:
1. Insert the Torbar into packing gland
G
.
2. Turn the Torbar until the indentation marks on the head are
positioned downstream of the flow – see Fig. 2.1, page 3.
3. Tighten the packing gland bolts
A
equally and evenly
until the packing gland is fully sealed, ensuring the Torbar
is able to slide through it.
4. Carefully open isolation valve
D
and check for leaks
around packing gland
G
.
5.
Drawbolt retraction assembly only
– turn each drive-nut
H
clockwise alternately until the Torbar passes through
isolation valve
D
and contacts the opposite internal wall
of the process pipe (
Models FPD350.(H6/H7/H8).E1
) or
enters the opposite fitting
F
(
Models FPD350.(H7/H8).E2
).
When the Torbar is inserted fully, ensure the drawbolts
J
and stop nuts
K
are in the positions shown.
6.
Drawbolt retraction assembly only
– tighten lock nuts
B
.
7.
Optional geared retraction assembly only
– turn the
integral handle clockwise until the Torbar contacts the
opposite internal wall of the process pipe (
Models
FPD350.(H6/H7/H8).E1
) or enters the opposite fitting
F
(
Models FPD350.(H7/H8).E2
).
8. Fully tighten packing gland bolts
A
, ensuring the Torbar
does not turn. Check for leaks.
Warning.
Do not position any part of the body in the
Torbar's exit path when removing or refitting the Torbar.
Note.
During step 2, turn drive nuts
C
equally and
evenly to prevent binding.
Note.
During step 5, 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.
Fig. 3.3 Removing and Refitting Models
FPD350.(H6/H7/H8)
A
D
K
C
E
B
H
G
F
J
Models H712 and
H812 Only
Fully Retracted
Fully Inserted
