Installation; Precautions; Mounting The Diaphragm Seals (Remote Seals); Mounting Flush Type/Extended Type Seals - YOKOGAWA DPharp EJXC80A User Manual

4.

Installation

4.1

Precautions

Before installing the transmitter, read the cautionary
notes in Section 2.4, "Selecting the Installation
Location." For additional information on the
ambient conditions allowed at the installation
location, refer to in the chapter 7 "Standard
Specifications."
IMPORTANT
• When welding piping during construction,
take care not to allow welding currents to
flow through the transmitter.
• Do not step on this instrument after
installation.
• For the EJC80 gauge transmitter, there
is a small hole in the low pressure side
cover flange that is used to measure the
atmospheric pressure.
The hole must not face upward. See
"Dimensions," in the chapter 7 for the
location of the hole.
• Never loosen the four bolts securing the
cover flanges (Refer to figure 3.2) for
EJC80 and EJC81 diaphragm seal
system.
If the seal liquid leaks, the transmitter cannot
be used.
<4. Installation>
4.2 Mounting the Diaphragm
Seals (Remote Seals)
4.2.1 Mounting Flush type/Extended type
Seals
Mount the diaphragm seals using the flanges as
shown in Figure 4.1 Figure 4.2 shows how to mount
the diaphragm seals on a tank. The mating flange,
gasket, bolts and nuts are to be procured by the
customer.
Bolt
The product is shipped with
these parts assembled.
Correctly install the diaphragm seals on
the high and low pressure sides of the
process (The label on each diaphragm
seal is marked HIGH or LOW.)
Figure 4.1 Mounting the Diaphragm Seals
(Remote seal)
IMPORTANT
Please use a gasket with an inside diameter
(ød) that is greater than the diameter of the
diaphragm seal. If a gasket with a smaller
inside diameter is used, the diaphragm may not
function correctly. (Refer to 'Dimensions' in the
chapter 7.)
4-1
Flange
Nut
Diaphragm
Ød
Gasket
F0401.ai
IM 01C25W01-01EN