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Caution in
Installation & Operation
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The
diaphragm tightening bolts are fastened
at designated torque during final assembly.
After the installation, however, check
if the bolts are loosened before the
fluid flow test. Should the bolts be
loosely tightened, tighten them with
the proper torque shown in the table
below. |
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When
the valve is used for slurries-containing
fluid, replace the valve body and the
diaphragm as needs arise, taking abrasion
into consideration. |
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Should
highly solidifying fluid leak out of
the diaphragm surface, disassemble the
valve, clean up the diaphragm surface
and reassemble it. |
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For
flange connecting bolts, and other notes
in handling, installation
and operation. |
Torque Standards for Tightening Diaphragm
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Nominal Diameter (A) |
15 |
20 |
25 |
32 |
40 |
50 |
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EPDM |
6.8{70} |
6.8{70} |
6.8{70} |
7.8{80} |
7.8{80} |
8.8{90} |
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PTFE |
6.8{70} |
6.8{70} |
6.8{70} |
11{120} |
11{120} |
14{150} |
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Nominal Diameter (A) |
65 |
80 |
100 |
125 |
150 |
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EPDM |
14{150} |
24{250} |
29{300} |
34{350} |
39{400} |
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PTFE |
24{250} |
29{300} |
34{350} |
39{400} |
44{450} |
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