Reference Manual
00809-0100-4727, Rev EA
October 2010
Rosemount 8700 Series
2-8
NOTE
Do not bolt one side at a time. Tighten each side simultaneously. Example:
1. Snug left
2. Snug right
3. Tighten left
4. Tighten right
Do not snug and tighten the upstream side and then snug and tighten the
downstream side. Failure to alternate between the upstream and downstream
flanges when tightening bolts may result in liner damage.
Always check for leaks at the flanges after tightening the flange bolts. Failure
to use the correct flange bolt tightening methods can result in severe damage.
All sensors require a second torquing 24 hours after initial flange bolt
tightening.
For sensors with ANSI 600# full rated, 900#, 1500#, and 2500# flanges, the
liner is protected from over-compression by the flange design. Standard
flange torque specifications as determined by ANSI and ASME should be
followed. No special precaution is required to prevent liner damage caused by
over torquing. Bolt tightening procedures laid out in this Quick Installation
Guide must still be followed.
To prevent liner damage on any magnetic flowmeter, a flat gasket must be
used. For optimum results on meters with high pressure flanges (ANSI 600#
or above), it is recommended that a flat full face gasket be used.
Under NO circumstances should a spiral wound or flexitallic gasket be used
as this will damage the liner sealing surface.
Table 2-1. Flange Bolt Torque Specifications for Rosemount 8705 and 8707
High-Signal Sensors
PTFE/ETFE liner
Polyurethane liner
Size
Code
Line Size
Class 150
(pound-feet)
Class 300
(pound-feet)
Class 600
(1)
(Derated to
1000 psi)
(1) Derated available with PTFE lining only.
Class 150
(pound-feet)
Class 300
(pound-feet)
005
0.5-in. (15 mm)
8
8
8
8
-
010
1- in. (25 mm)
8
12
13
13
-
015
1.5-in. (40 mm)
13
25
29
29
7
020
2-in. (50 mm)
19
17
20
20
14
030
3-in. (80 mm)
34
35
41
41
23
040
4-in. (100 mm)
26
50
68
68
17
060
6-in. (150mm)
45
50
77
77
30
080
8-in. (200 mm)
60
82
121
121
42
100
10-in. (250 mm)
55
80
129
129
40
120
12-in. (300 mm)
65
125
146
146
55
140
14-in. (350 mm)
85
110
194
194
70
160
16-in. (400 mm)
85
160
274
274
65
180
18-in. (450 mm)
120
170
432
432
95
200
20-in. (500 mm)
110
175
444
444
90
240
24-in. (600 mm)
165
280
731
731
140
300
30-in. (750 mm)
195
375
-
-
165
360
36-in. (900 mm)
280
575
-
-
245
See ”Safety Messages” on pages 2-1 and 2-2 for complete warning information.
Aotewell Ltd
www.aotewell.com
Industry Automation
HongKong|UK|China
+86-755-8660-6182