ENMET DC Powered Sample Module - Manual (Page 13)

Gas Sampling Unit ENMET Corporation
9
6.0 Maintenance 6.0 Maintenance
The flow rate of the sampling pump should be checked occasionally. The sampling pump has a diaphragm, which
may ware out. Wear on the diaphragm has a direct influence of flow rate. If the flow rate decreases, and there is no
restriction in the air line, the diaphragm may need replacing. There are two styles of diaphragm pump that have been
used in the Gas Sampling Unit. See illustrations in sections 6.1 and 6.2 to determine the replacement part numbers and
procedures for maintenance.
6.1 Pump Maintenance for Pump 04018-018
Instructions for replacing diaphragm of ENMET pump part number 04018-018
If the diaphragm becomes damaged or torn, it can be replaced.
Replacement diaphragm ENMET part number 04018-017.
Figure 9: 04018-018 Pump Features
1. Before proceeding, see if diaphragm is torn.
Stretch diaphragm by lifting armature. This will
expose a torn spot.
2. Free armature assembly and diaphragm.
Pop-off diaphragm using thumbs.
3. Swing armature up to allow removal of diaphragm.