SMAR LD303, Инструкция по эксплуатации и техническому обслуживанию

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Maintenance Procedures
4.9
SPARE PARTS LIST
DESCRIPTION OF PARTS POSITION CODE
CATEGORY
(NOTE 1)
DRAIN/VENT VALVE
316 SST 28 400-0792
PLUG
1/2 NPT Internal Hexagon Plug in Plated CS (Ex d)
1/2 NPT Internal Hexagon Plug in 304 SST (Ex d)
M20 X 1.5 External Hexagon Plug in 316 SST (Ex d)
PG 13.5 External Hexagon Plug in 316 SST (Ex d)
1/2 NPT Internal Socket Set Plug in Plated CS
1/2 NPT Internal Socket Set Plug in 304 SST 27
27
27
27
27
27 400-0808
400-0809
400-0810
400-0811
400-0583-11
400-0583-12
ADAPTER FOR ELECTRIC CONNECTION
3/4 NPT female for 1/2 NPT male, SST 316 - 400-0812
Table 4.2 - Spare Part List
Smar Insulator Kit
The Insulator Kit Smar prevents the generation of galvanic current between metals when in contact.
The difference of potential between the metals generates this current that flows from the metal with
higher potential to the other. This process in the presence of aqueous solution with salts, acids or
bases can start the corrosion process, where the corroded metal is always the one with bigger
potential (anode).
In the processes, when it is impossible to isolate the two potencialized metals, occurs the generation
of galvanic current. This current will form free ions of hydrogen (H+) in one of the solutions, with
tendency to start the corrosion and the migration of the Hydrogen to the diaphragm of the Remote
Seal or of the Level Transmitter.
The figure 6.3 shows the following parts that constitute the Smar Insulator Kit: Teflon Gasket (
6
),
Nonmetallic Insulating Sleeve (
4
), Mica Washers (
3
) and Steel Washers (
2
).
Smar Insulator Kit Mounting
Mounting step by step:
1 – Insert all the Nonmetallic Insulating Sleeve (
4
); in the holes of the Sealed Flange (
5
);
2 – Put the Teflon Gasket (6) between the Flanges (
5
e
7
);
3 – Insert the Steel Washers (
2
) and the Mica Washers (
3
) in the bolts (
1
)
4 – Join the Flanges positioning its holes (
5
and
7
);
5 – Introduce the bolts in the holes of the flanges (
5
and
7
) and tighten the flanges with the nuts (
8
)
6 – Measure the resistance between the Sealed Flange (
5
) and the Flange of Process (
7
) that
should be tending to the infinite to check the efficiency of the Insulator Kit.
NOTE
If the studs are used instead of the bolts, obey the same mounting sequence for the items 2, 3 and
4. This Insulator Kit can be applied with raised and flat face flanges.
The Gasket must be made of Teflon when the Smar Insulator Kit is indicated.
NOTES
1 - For category A, it is recommended to keep, in stock, 25 parts installed for each set, and for category B, 50.
2 - Includes Terminal Block, Bolts, caps and Identification plate without certification.
3 - O’Rings and Backup Rings are packaged in packs of 12 units.
4 - To specify sensors, use the following tables.
5 - Including U-clamp, nuts, bolts and washers.
6 - For this type, O’Ring pack has 1 piece.