Welker INFLOW, Инструкция по установке, эксплуатации и обслуживанию

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Using an Auxiliary Gas (Optional)
14.
With isolation valve A closed, connect a customer-supplied auxiliary gas supply to vent/relief valve B ( Figure 1 ).
15. Regulate the customer-supplied auxiliary gas supply to a pressure equal to the pipeline pressure.
16.
Open the valve on the customer-supplied auxiliary gas supply.
17.
Slowly open vent/relief valve B to ensure that adequate pressure is applied to the internal shaft piston ( Figure 1 ).
Failure to ensure that adequate pressure is applied to the internal shaft piston prior to retraction could result in unexpected
retraction of the insertion shaft, which could damage the unit or injure the operator.
18.
Close vent/relief valve B ( Figure 1 ).
19.
Disconnect the customer-supplied auxiliary gas supply from vent/relief valve B ( Figure 1 ).
20.
Remove the hex bolts from the top of the lock collar ( Figure 3 ).
21.
Slowly open vent/relief valve B. This will relieve pressure from the internal shaft piston, allowing the insertion shaft to
begin retracting from the pipeline. If pipeline pressure is not sufficient to push the insertion shaft out of the line, the
insertion shaft may be retracted manually or by applying auxiliary gas to the vent outlet.
Once the insertion shaft begins to retract, do not open the valve any further. The insertion shaft should be retracted slowly and
smoothly. Opening the valve too quickly or too much may cause the insertion shaft to retract from the pipeline too quickly and
may result in damage to the unit.
22.
Once the insertion shaft is fully retracted, close vent/relief valve B, and then close the pipeline isolation valve to isolate
the unit from pressure (
Figure 1 ).
23.
Proceed to step 31 to complete retraction.
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IOM-161 MODEL: INFLOW™ ACE WITH AI CONTROL™ REV: D 13839 West Bellfort Street, Sugar Land, TX 77498 welker.com Service Department 281.491.2331