FLUID COMPONENTS, INTL
CHAPTER 2 - INSTALLATION
Model ST98 Flow Meter
2 - 4
Doc. No. 06EN003291 Rev. A
of the process pipe at the predetermined location. Calculate 1/2 of the inner diameter. Add the pipe wall
thickness. Add the length the customers flange is above the pipe. The length above the pipe should be
adjusted to match the U-Length minus the 0.50 inch (12.7 mm) dimension.
3.
Apply the appropriate gasket and/or sealant to flange mount faces as required.
4.
Attach the process mating flange with care. The mating surface should be oriented so the flow element flats
are parallel to flow, within ±1°, and the flow arrow on the flow element should be pointing in the same
direction as the flow.
5.
Attach with a bolt, two flat washers, lock washer and nut for each bolt hole; apply lubricant/sealant to the
male threads and torque. Refer to ANSI B16.5 specifications.
In-Line Mounting
There are several different ways the in-line model ST98 instrument can be mounted into the process line. The
different ways the flow element can be mounted are as follows:
•
Threaded male NPT mount
•
Threaded female NPT mount
•
Raised face flange mount
•
Butt Weld mount
Figure 2-2 shows a Butt Weld, 2 inch Schedule 40 pipe, in-line model ST98:
Mount the in-line Model ST98 as follows:
1.
Verify that the process media flow is in the same direction as the flow arrow (see Figure 2-2).
2.
For flange mounted instruments, apply the appropriate gasket and / or sealant to flange mounts as
required.
3.
For NPT mounted instruments, apply the appropriate sealant to the threads as required.
4.
Mate (or weld the Butt Weld instrument) the instrument to the process line.
5.
For flange mounts, attach the instrument with a bolt, two flat washers, lock washer and a nut for each bolt
hole. Apply lubricant/sealant to the male threads of bolts or to the NPT threads and torque. Refer to
ANSI B16.5 torque specifications.
Install Flow Transmitter
Alert:
In applications where the flow element is located in an explosive environment, isolate the conduit
before it leaves the environment. A potting Y may be used to provide the isolation.
Note:
FCI recommends installing an input power disconnect switch and fuse near the flow transmitter to
interrupt power during installation, maintenance, calibration, and troubleshooting procedures.
Figure 2-2. Model ST98 In-Line Butt Weld Mount
