<4. Installation>
4-5
IM 01C25W05-01EN
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 be procured by the customer.
Diaphragm
Gasket
Procured by customer
Mating flange
Procured by customer
Ring
Spiral gasket
Pressure-detector
section
F0411.ai
Figure 4.13 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*
Hoop material/Part number
Gasket size
Description
SUS316
SUS316L Hastelloy C-276
ø100 × ø120 × t4.5
For 3-inch flange
General use
F9350SV
F9350SW
F9990BR
ø100 × ø120 × t4.5
For 3-inch flange
High temperature use
F9990BK
F9990BN
--------
ø100 × ø120 × t4.5
For 3-inch flange
Oil-prohibited use**
F9970XF
F9970XG
--------
ø70 × ø90 × t4.5
For 2-inch flange
General use
F9350ST
F9350SU
F9990BQ
ø70 × ø90 × t4.5
For 2-inch flange
High temperature use
F9990BJ
F9990BM
--------
ø70 × ø90 × t4.5
For 2-inch flange
Oil-prohibited use**
F9970XD
F9970XE
--------
ø60 × ø75 × t4.5
For 1 1/2-inch flange
General use
F9346ZH
F9970XA
F9990BP
ø60 × ø75 × t4.5
For 1 1/2-inch flange
High temperature use
F9990BH
F9990BL
--------
ø60 × ø75 × t4.5
For 1 1/2-inch flange
Oil-prohibited use**
F9970XB
F9970XC
--------
*:
Filler material
General use, oil-prohibited use: PTFE
High temperature use: Inorganic paper
**:
When option code /K31 or /K35 is specified
