Diaphragm Seals Installation Consideration - YOKOGAWA DPharp EJA110A User Manual

3.2.1 EJA210A and EJA220A
The transmitter is mounted on a process using its
high pressure side fl ange as shown in Figure 3.5. The
customer should prepare the mating fl ange, gasket, stud
bolts and nuts.
Stud bolt
Gasket
Nut
Figure 3.5 EJA210A and EJA220A Mounting
3.2.2 EJA118 and EJA438
Mount the diaphragm seals using the fl anges as shown
in Figure 3.6. The customer should prepare the mating
fl ange, gasket, bolts and nuts.
Diaphragm
Bolt
The product is
Correctly install the diaphragm
shipped with these
seals on the high and low pressure
parts assembled.
sides of the process, checking the
label on each seal.
Figure 3.6 Mounting the Diaphragm Seals
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Flange
Nut
ød
Gasket
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<3. Installation>
3.3 Diaphragm Seals Installation
Consideration
IMPORTANT
• When measuring the liquid level of the tank, the
minimum liquid level (zero point) must be set to a
level at least 50 mm above the center of the high
pressure side diaphragm seal (see Figure 3.2.3).
• Correctly install the diaphragm seals on the high
and low pressure sides of the process, checking
the label on each seal.
• To avoid measuring error duets temperature
difference between the two diaphragm seals,
capillary tube must be bound together. The
capillary tube must be securely fi xed to the tank
wall to prevent movement by wind or vibration.
If the capillary tube is too long, loosely coil the
excess and secure using suitable clamps.
IMPORTANT
Install the sealed diaphragm
so that the shank positions
downward.
The transmitter should be installed as low
as possible below the position where the
high pressure side diaphragm seal is
installed.
Figure 3.7 Installing the Diaphragm Seals to a
Tank
16
Low
pressure
side
Minimum
High
liquid level
pressure
side
50mm minimum
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IM 01C22A01-01E