1.
Refer to Figure 6-1 detail B. Insert the tube (5) through the nut (4) and into the Swagelok
connector (1). Ensure that the tube rests firmly on the shoulder inside the fitting, and that the
nut (4) is finger tight.
2.
Tighten the nut (4) until you cannot rotate the tube (5). If you cannot turn the tube because of
how it is installed, tighten the nut by
1
/
8
th of a turn.
3.
Refer to detail C. Mark the nut (4) at the six o'clock position.
4.
Refer to detail D. Hold the body of the connector steady, then turn the nut (4) by 1
1
/
4
turns (to
the nine o'clock position) to fully tighten the connection.
6.2.2
Reconnect a Swagelok connector
You can disconnect and reconnect a Swagelok connector many times and still obtain a correct
leak-proof seal. Refer to Figure 6-2 detail A which shows a Swagelok connector after you have
disconnected it. Use the following procedure to reconnect it:
1.
Refer to detail B. Insert the tube (5) with the swaged ferrules (2, 3) into the Swagelok fitting
(1), until the front ferrule (2) is fully in the body of the fitting.
2.
Refer to detail C. Tighten the nut (4) by hand.
3.
Use a wrench or spanner to turn the nut (4) to its original position (you will feel an increase in
resistance when the nut is in its original position), then tighten the nut slightly.
6.3
Maintenance frequency
The iL system requires little user maintenance. The maintenance operations you can carry out
are described in the following sections. The frequency of maintenance operations depends on
your process. Adjust the frequency of maintenance operations according to your experience.
When you maintain the iL system, use BOC Edwards maintenance and service kits. These
contain all of the necessary seals and other components necessary to complete maintenance
operations successfully.
6.4
Inspect the connections, pipelines, cables and fittings
Note:
Refer to Section 6.2 if you have to connect, disconnect or tighten Swagelok fittings.
1.
Remove the enclosure side and top panels: refer to Section 3.4.
2.
Check that all the cooling-water connections are secure; tighten any loose connections.
Inspect all cooling-water pipelines, hoses and connections and check that they are not
corroded or damaged and do not leak; repair or replace any pipelines, hoses and connections
that are corroded or damaged, or which leak.
3.
Check that all the nitrogen connections are secure; tighten any loose connections. Inspect all
nitrogen pipelines and connections and check that they are not corroded or damaged and do
not leak; repair or replace any pipelines and connections that are corroded or damaged, or
which leak.
6-4
iL Dry Pumping Systems
