Mounting The Flushing Connection Ring - YOKOGAWA EJX Series User Manual

IMPORTANT
The transmitter should be installed at least 600 mm below
the high pressure (HP) process connection to ensure a
positive head pressure of fill fluid. Pay special attention to
vacuum applications.
If it can not be installed at least 600 mm below the HP
process connection, please use the equation below:
(P–P0)
h= × 0.102 [mm]
ds
h: Vertical height between the HP process connection
and the transmitter (mm)
h≤0: I nstall the transmitter at least h (mm) below the
HP process connection
h>0: I nstall the transmitter at most h (mm) above the
HP process connection
P: Pressure in the tank (Pa abs)
P0: Minimum working pressure limit of the transmitter (Pa
abs) See below table.
[For fill fluid code A, B, C, D, E]
Wetted parts
Capillary
material
length
code
1 to 5m
SW
6 to 10m
1 to 5m
SE
6 to 10m
1 to 5m
SY
6 to 10m
1 to 5m
HW
6 to 10m
1 to 5m
TW
6 to 10m
1 to 5m
UW
6 to 10m
[For fill fluid code 1, 2, 4]
Wetted parts
Capillary
material
length
code
1 to 5m
SW
6 to 10m
1 to 5m
SE
6 to 10m
1 to 5m
SY
6 to 10m
1 to 5m
HW
6 to 10m
1 to 5m
TW
6 to 10m
ds: Specific gravity of fill fluid (at 25°C). See below table.
Fill fluid
A, 1, 4 B
code
ds: Specific
1.07 0.94
gravity
Process connection size
code
2, 8 3 4,W
6790 3190
10030 3520
6790 3190
10030 3520
3190
3520
19150 6140
8290
9620 3620
4210
9540 4750
6050
Process connection size
code
2, 8 3 4,W
2570 320
4680 530
2570 320
4680 530
320
530
10220 2050
3450
4270 570
960
C, 2 D E
1.90 to
1.09 1.09
1.92
<3. Installation>
Low pressure side
h
High
(+) pressure
side
0
(–)
Figure 3.8 Example of Installation to Tank
(Caution on Installation)
3.4 Mounting the Flushing
Connection Ring
3.4.1 Mounting to Pressure Detector
Section
The flushing connection ring is mounted to the pressure
detector section as shown in Figure 3.9.
At the factory shipment, the flushing connection ring is
already assembled and attached to process detector
section.
Pressure-detector section
Ring
Groove for
installing
spiral gasket
View from pressure
detector section
Figure 3.9 Mounting to Pressure Detector Section
(1) Mount the ring holder on the ring and loosely tighten
the mounting screws.
(2) Place the spiral gasket in the ring groove. With the
ring correctly aligned and flush with the face of the
pressure detector, securely tighten each ring holder's
mounting screws.
(3) Position the ring so that the drain/vent plugs are
aligned straight up and down.
20
P
F0308.ai
Spiral gasket
Ring holder
Drain/vent plug
F0309.ai
IM 01C25A01-01E