Yokogawa EJX118A - Manual (Page 26)

<4. Installation>
4-4
IM 01C25H01-01E
4.4 Mounting the Flushing
Connection Ring
4.4.1 Mounting to Pressure Detector
Section
The flushing connection ring is mounted to the
pressure detector section as shown in Figure 4.6.
At the factory shipment, the flushing connection
ring is already assembled and attached to process
detector section.
Ring holder
Spiral gasket
F0406.ai
View from pressure detector section
Groove for installing
spiral gasket
Pressure-detector section
Drain/vent plug
Ring
Figure 4.6 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.
4.4.2 Mounting to Process Flange
Tighten the bolts to completely close the gap
between the ring and the pressure detector section.
The mating flange, gasket, stud bolts and nuts are
to procured by the customer.
F0407.ai
Ring
Diaphragm
Pressure-detector
section
Gasket
Mating flange
Spiral gasket
Figure 4.7 Mounting to Process Flange
IMPORTANT
• Confirm that there is no gap between the ring
and the process-detector section after they
are mounted on the process flange. A gap
can lead to a sudden, explosive release of
process fluids.
• When mounting or removing the ring,
take care not to tilt the pressure detector
downward as the ring can slip off and cause
injury.
• When re-mounting the ring, use the new
spiral gasket as shown in below table.
Table 4.1 Spiral Gasket for Pressure Detector
Section Side*
Part number Size Description
F9350SV ш100Чш120Чt4.5 For 3-inch flange
F9970XF ш100Чш120Чt4.5 For 3-inch flange**
F9350ST ш70Чш90Чt4.5 For 2-inch flange
F9970XD ш70Чш90Чt4.5 For 2-inch flange**
F9346ZH ш60Чш75Чt4.5 For 1 1/2-inch flange
F9970XB ш60Чш75Чt4.5 For 1 1/2-inch flange**
*: Material; 316SST (Hoop), PTFE Teflon (Filler)
**: For oil-prohibited use (Option code: /K1, /K2, /K5, /K6)