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INSTRUCTION MANUAL 10DX3111A&G Sizes 14 - 24 Inches
A pair of the proper gaskets to suit the particular
lining option of the meter supplied is included within
the installation kit which accompanies the Magnetic
Flowmeter. Before connections are made, the bear-
ing surfaces of neoprene or polyurethane-lined me-
ter flanges, their neoprene gaskets and adjacent
pipeline flanges must be thoroughly dusted with tal-
cum powder. This is done to prevent possible dam-
age to the meter lining or gaskets, should the meter
be removed from the line.
If the Magnetic Flowmeter is to be mounted in a
non-conductive pipeline or a metal pipeline with an
insulating liner, the user must provide a pair of suit-
able gaskets between the customer-supplied annu-
lar meter grounding rings (discussed under Section
2.5.2) and the adjacent pipeline flange surfaces.
The standard coarse thread flange bolts supplied by
the user must be well lubricated and tightened in
even increments around the flange surface using a
"star" pattern as shown in Figure 2-4. Note that 14
through 24 inch meters will have a correspondingly
larger number of bolt holes as shown in Table 2-1.
Bolt torque should be limited to that which will produce a positive seal for the application. Recom-
mended mounting-bolt torque values are shown in Table 2-1 below.
TABLE 2-1. RECOMMENDED MOUNTING-BOLT TORQUES
Meter
Size
# of
Holes
14
12
16
16
18
16
20
20
24
20
Notes:
1. Torques listed are for bolts with threads lubricated.
2. All meters with PTFE liners need to be re-torqued after 48 hours of operation.
ANSI Class
150
Bolt Size
ft. lbs.
Nm
[Diam.]
(in.)
1
120
160
1
115
155
1 1/8
175
240
1 1/8
155
210
1 1/4
220
300
FIGURE 2-4. BOLT TIGHTENING
SEQUENCE
ANSI Class
300
# of
Bolt Size
ft. lbs.
Holes
[Diam.]
(in.)
20
1 1/8
20
1 1/4
24
1 1/4
24
1 1/4
24
1 1/2
Nm
215
125
310
175
335
195
400
215
675
335
2-7
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