Azbil MCB10A, Руководство пользователя

Страница: 40 / 114

Instrument installation Azbil Corporation
2-18 Model MCB10A
Installing method (1) on a polyvinyl chloride pipe
Introduction
The installing method shown on this page is applicable to the following combination
of pipe and grounding ring materials. For installing methods applicable to other
combinations, refer to the table on page 2-13.
Pipe: Polyvinyl chloride (PVC)
Grounding ring: SUS material
Necessary components
Provide the following components:
• Through bolts and nuts
•
Centering fixtures
• Gaskets: The recommended gaskets are gaskets made of PTFE or rubber.
Recommended gasket internal diameter: Refer to Table 2-2 on page 2-12.
If rubber gaskets are used, additional gaskets are required. The gaskets should
be 0.5 to 1 mm thick and of the same material as the provided rubber gaskets.
For the dimensions, refer to Table 2-3 on page 2-12.
• Protective fixtures: Needed if installing with the prescribed tightening torque
gives rise to a threat of deformation of, or damage to, the PVC pipe. Use
stainless steel or other metallic material 6 mm thick or more that will not
deform when the nut is tightened. For the fixture shape, see Figure 2-14.
Installing method
The installing method depends on the amplitude of the tightening torque, existence
or nonexistence of protective fixtures and other conditions. Install according to the
applicable conditions.
1. Installing with the prescribed tightening torque
Install as shown below.
For the tightening torque, follow Table 2-1 on page 2-9 irrespective of the
gasket material. The gasket internal diameter should conform to Table 2-2 on
page 2-12.
CAUTION
When rubber gaskets are used, the tightening torque must be small. However, this
may give rise to an insufficient surface pressure between the lining and grounding
ring, resulting in fluid leakage and injury.
Lining
Grounding ring
Gasket
Figure 2-13 Grounding ring made of SUS material