BOC Edwards iH600 - 3.13 Leak Test the System

3.12 Connect the nitrogen supply
CAUTION
Ensure that your nitrogen supply conforms to the requirements given in Section 2. If it does
not, the flow sensors may not operate correctly, the gas pipelines may become blocked or the
iH system may be damaged.
Connect your nitrogen supply to the iH system through the nitrogen inlet on the rear of the
iH system (Figure 1-5, item 4).
Use rigid metal supply pipelines (such as stainless steel). We recommend that the nitrogen
supply pipeline to the iH system has an outside diameter of
1
/
4
inch, and that the pipeline is
designed and constructed so that large pressure drops are not introduced into the nitrogen
supply.
Use the Tube fittings in the fitting-kit to connect your nitrogen pipeline to the iH system: use
the Tube fittings as described in Section 6.2.
3.13 Leak test the system
WARNING
Leak-test the system after installation and maintenance and seal any leaks
found to prevent leakage of dangerous substances out of the system and
leakage of air into the system.
Note: If you need further information on leak testing, contact your supplier or BOC Edwards for advice.
Leak-test the system after installation and seal any leaks found. Dangerous substances which
leak from the system will be dangerous to people and there may be a danger of explosion if
air leaks into the system.
Use a pump down test with helium to leak test the pump. We recommend that the leak rate
is 1 x 10
-5
mbar.ls
-1
(1 x 10
-3
Pa.ls
-1
) helium or less for the complete system, or 1 x 10
-6
mbar.ls
-1
(1 x 10
-4
Pa.ls
-1
) helium or less for any individual leak.
The iH system is supplied with a blanked leak-test port, as shown in Figure 3-7. To connect
to this port:
1. Refer to Figure 3-7. Remove the
3
/
8
inch BSP blanking plug from the port (2 or 5).
2. Fit a suitable NW25 klein adaptor and 'O' ring and (if required) an elbow to the port, then
connect your leak test equipment to the adaptor or elbow.
3-16 iH Dry Pumping Systems