Azbil MagneW Two-wire PLUS+ MTG15A, Руководство пользователя

Страница: 34 / 280

2-12
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 turbrent flow and affect 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.
Table. 2-2. Recommended internal diameters of gaskets
(Unit: mm)
Body diameter
Dimensions
25 mm
(1 inch)
40 mm
(1-1/2 inch)
50 mm
(2 inches)
65 mm
(2-1/2 inches)
80 mm
(3 inches)
100 mm
(4 inches)
Internal diameter 25±1 40±1 51±1 64±1 76±1 101±1
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 for the respective pipe size.
Depending on the grounding ring material, two gaskets of different thicknesses may be
required. (See Fig. 2-16.on page 2-20 and Fig. 2-19.on page 2-22.)
Table. 2-3. Internal and external diameters of rubber gaskets (0.5 to 1 mm thick)
(Unit: mm)
Body diameter
Dimensions
25 mm
(1 inch)
40 mm
(1-1/2 inch)
50 mm
(2 inches)
65 mm
(2-1/2 inches)
80 mm
(3 inches)
100 mm
(4 inches)
Internal diameter 25±1 40±1 51±1 64±1 76±1 101±1
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)
Body diameter
Dimensions
25 mm
(1 inch)
40 mm
(1-1/2 inch)
50 mm
(2 inches)
65 mm
(2-1/2 inches)
80 mm
(3 inches)
100 mm
(4 inches)
Internal diameter 25±1 39±1 51±1 64±1 76±1 101±1
External diameter 50±1 68±1 84±1 104±1 114±1 139±1