Instrument installation Azbil Corporation
2-16 Model MTG11A/18A, MTG11B/18B, MTG14C
Gaskets
Gaskets are supplied with the grounding ring as standard accessory, except when it is
made of SUS material. Secure gaskets when you use a grounding ring made of SUS
material. We recommend gasket material such as joint sheet or PTFE. For the internal
diameters of the gaskets, refer to Table 2-2. We do not recommend the use of rubber
gaskets. Observe the precautions below.
~Note • A gasket with too small internal diameter may generate turbulent
flow, resulting in inaccurate measurements.
• A gasket with too large internal diameter may cause leakage. Also,
any solid substance in the fluid to be measured could accumulate
between the gasket and the flange, resulting in inaccurate
measurements.
If you install the detector at a lower torque level using rubber gaskets, you must use
gaskets with the internal and external diameters shown in Table 2-3 and Table 2-4 for
the respective pipe size. Depending on the grounding ring material, two gaskets of
different thicknesses may be required. (See Figure 2-20 on page 2-23 and Figure 2-23
on page 2-25.)
Table 2-2 Recommended internal diameters of gaskets (Unit: mm)
Nominal detector bore
diameter
Dimensions
25 mm
(1 inch)
40 mm
(1½ inch)
50 mm
(2 inches)
65 mm
(2
½
inches)
80 mm
(3 inches)
100 mm
(4 inches)
Gasket internal diameter 25.5
±1
40.5
±1
52
±1
65
±1
79
±1
104
±1
Table 2-3 Internal and external diameters of rubber gaskets (0.5 to 1 mm thick)
(Unit: mm)
Nominal detector bore
diameter
Dimensions
25 mm
(1 inch)
40 mm
(1½ inch)
50 mm
(2 inches)
65 mm
(2
½
inches)
80 mm
(3 inches)
100 mm
(4 inches)
Gasket internal diameter 25.5
±1
40.5
±1
52
±1
65
±1
79
±1
104
±1
Gasket external diameter 50
±1
75
±1
91
±1
111
±1
121
±1
146
±1
Table 2-4 Internal and external diameter of rubber gaskets (3 to 4 mm thick)
(Unit: mm)
Nominal detector bore
diameter
Dimensions
25 mm
(1 inch)
40 mm
(1½ inch)
50 mm
(2 inches)
65 mm
(2
½
inches)
80 mm
(3 inches)
100 mm
(4 inches)
Gasket internal diameter 25.5
±1
40.5
±1
52
±1
65
±1
79
±1
104
±1
Gasket external diameter 50
±1
68
±1
84
±1
104
±1
114
±1
139
±1
CM2-MTG300-2001.book 16 ページ ２０１５年９月２９日 火曜日 午前１０時１４分
To Next Page
Loading...
