Cameron 351, Руководство по установке

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Section 3 Model 351/352/353 Liquid Level Systems
Model 353 Sensor Bellows Removal/Replacement
The sensor bellows must be removed under the following circumstances:
• when the capillary system is to be pressurized
• for argon flow during weld ing
• for static pressure tests of the capillary system
• for replacement of a damaged sensor
To remove the sensor bellows, perform the following steps:
1.
Remove the 12 housing bolts. Carefully remove the bellows bottom plate
assembly from the housing.
CAUTION: The sensor bellows can be damaged by contact with the housing.
When removing the sensor assembly, avoid unnecessary contact
with the housing.
2. Remove the bellows from the bottom plate by turning the valve seat with
the sensor bellows wrench and lift ing the bellows until the guide stem is
withdrawn from the capillary tubing. Observe the two O-rings on the bot-
tom of the valve seat; they may fall free when the bellows is lifted.
3. (Pressure Tests Only) Install a test fitting with an O-ring (refer to Figure
4.1, item 4, and Figure 4.2, page 15 ). Tighten with the sensor bellows
wrench to 39 to 40 ft-lb (53 to 55 N-m). Remove the test fitting when
pressure tests are complete.
Table 4.1—Model 353 Tools and Test Fittings
Item Description Part No. Purpose Qty
1 Sensor Bellows
Spacer Assembly
9A-0353-1069B Hold bellows in “open”
position during fill
2 per
sensor
2 Sensor Bellows
Wrench
9A-0353-1053C Removal/installation of
sensor bellows
2
3 Fill Valve Test Fitting 9A-0353-1109B Connection for applying
pressure thru fill valve
3
4 Seal Plug Adapter 9A-S039-0087Z Replace sensor bellows
assembly during
pressure tests
1 per
sensor
Figure 4.1—Model 353 tools and test fittings identification