7-4
IM 01F06A00-01E
7. MAINTENANCE
7.5 Vortex Shedder Removal
CAUTION
• Disassemble work should be done only for
error occurrence.
• Only expert engineer or skilled personnel are
permitted to open the cover.
• When the vortex shedder is disassembled, and
empty the flow tube before the gasket must be
replaced with a new one.
• Output error may cause when the shedder bar
is not restored correctly.
• For Explosion proof type, move vortex flowme-
ter to non-hazardous area firstly, then do the
assemble work.
(1) Remove the converter cover.
(2) For Integral Type, loosen the terminal screws and
disconnect leadwires on the amplifier and loosen 4
screws to disassemble the Amplifier. And for Remote
Type, remove the terminal box cover in the same way.
(3) Loosen the bracket mounting bolts and remove the
terminal box together with the bracket. Be careful not to
damage the leadwires connected to the vortex shedder
assembly when removing the terminal box.
(4) Loosen the vortex shedder assembly mounting bolts or
nuts and remove the vortex shedder assembly.
(5) When reassembling the vortex shedder assembly, reverse
above procedure. Confirm the following.
a.
The gasket should be changed to new one.
b.
The guide pin on the vortex shedder mounting block
meets the guide pin hole. See Figure 7.3. The guide
pin applies to the 1 to 4 inch flowmeters.
c.
The vortex shedder assembly is installed as illus-
trated in Figure 7.3.
d.
Tighten the sensor mounting bolts or nuts with a
torque wrench, applying the torque specified below.
Table 7.1 Torque Value
15 (1/2)
1.6 (140)
25 (1)
1.2 (105)
1.75 (153)
1.2 (105)
40 (1-1/2)
1.2 (105)
1.75 (153)
1.2 (105)
50 (2)
2 (174)
5 (435)
2 (174)
80 (3)
3 (260)
10 (870)
4 (348)
100 (4)
4 (348)
10 (870)
5 (435)
150 (6)
5 (435)
7 (608)
5 (435)
200 (8)
7 (610)
10 (870)
7 (608)
250 (10)
16 (1390)
300 (12)
16 (1390)
T070501.EPS
Nominal Size
mm (inch)
Standard
A
High Temperature (/HT)
B
UNIT: kg.m (
艎
b.in)
In case of High Temperature Version (Option code: HT),
First time tighten Nuts with a torque wrench, applying the
torque specified “A”.
Next time loosen Nuts completely, then again tighten Nuts
with a torque wrench, applying the torque specified “B”.
e.
Insert the leadwires (vortex shedder) through the
terminal box bottom hole and lower the terminal box
slowly until the bracket touches the flowmeter
shoulder. Be sure to keep the leadwires vertical
while lowering the terminal box.
f.
After assembling, confirm that there is no leakage
from the vortex flowmeter.
IMPORTANT
Please tighten the screws/bolts uniformily and
observing the torque value in Table 7.1.
