YOKOGAWA ADMAG AXR - 12.2 HAZARDOUS AREA CLASSIFICATION

12-5
IM 01E30D01-01EN
<12. OUTLINE>
GroundingRing/GroundingElectrode;
•GroundingRing(platetype)
Stainless steel-JIS SUS316 (AISI 316 SS/EN
1.4401 equivalent), Stainless steel-JIS SUS316L
or ASTM 316L (AISI 316L SS/EN 1.4404 equiva-
lent), HASTELLOY C-276
*1
equivalent
•GroundingElectrode(electrodetype)
*2
Fluorocarbon PFA lining + grounding electrode
(Tantalum, Platinum-Iridium)
*1: Hastelloy is a registered trademark of Haynes Interna-
tional Inc.
*2: Thepermeableuids(suchasnitricacid,hydrouoric
acid, or sodium hydroxide at high temperature) are
unusable.
Gasket;
Use General-purposeUse/
Explosion Proof Type
Standard
Grounding ring
No gasket within Flowtube
Optional
code
(GA, GC,
or GD)
Grounding ring
Gasket within Flowtube
Gasket Material (within Flowtube)
GA: Fluororubber for PVC pipes (Viton®)
GC: Acid-resistantuororubberforPVC
pipes (Viton®)
GD: Alkali-resistantuororubberforPVC
pipes (Viton®)
Use General-purposeUse/
Explosion Proof Type
Optional
code
(BSF or
BSC)
Grounding ring
Flange of user’s pipe
Gasket for
user’s flange
GasketMaterial(foruser’sange)
BSF: PTFE-sheathed non-asbestos
BSC: Chloroprene rubber
Recommended Gaskets Between Flowtubes And
User’s Flanges:
Gaskets Type
Usecompressednon-asbestosbergaskets,
PTFE-sheathed non-asbestos gaskets or gaskets
which have equivalent elasticity.
For optional codes GA, GC, and GD, use rubber gas-
kets or others which have equivalent elasticity.
Gaskets Size
Be sure to choose a gasket with an inner and outer
diameter that does not protrude inside the piping
(Read Subsection 3.3.4).
If the inner diameter of the gasket is too large, or out-
erdiameterofthegasketistoosmall,uidleakage
may result.
Electrode Construction:
Internal insertion type
12.2 HAZARDOUS AREA
CLASSIFICATION
Read Chapter 14.