3.1 Before You Begin
1.
Maintenance is necessary if a leak occurs at the base or flange.
2.
Prior to maintenance or disassembly of the unit, it is advisable to have a repair kit available for repairs of the system in
case of unexpected wear or faulty seals.
New seals supplied in spare parts kits should be lightly lubricated before being installed to ease the installation of the seals and
reduce the risk of damage when positioning them on parts. Wipe excess lubricant from the seals, as it may adversely affect
analytical instrument results.
For sample-exposed seals, Welker recommends non-hydrocarbon-based lubricants, such as Krytox®.
For non-sample-exposed seals, Welker recommends either non-hydrocarbon-based lubricants or silicone-based lubricants, such
as Molykote® 111.
After the seals are installed, the outer diameter of shafts and inner diameter of cylinders may be lubricated to allow smooth
transition of parts.
3.
All maintenance and cleaning of the unit should be performed on a smooth, clean surface.
4.
Welker recommends having the following tools available for maintenance. Please note that the exact tools required may
vary by model.
a.
Adjustable Wrench
b.
File or Fine Grit Sandpaper
c.
Seal Pick
d.
Tubing Crimp and Accessories
e.
Wire Cutters
3.2 Maintenance
If a leak occurs at the base or flange, the AP-3 requires maintenance.
1.
Prior to performing maintenance, the AP-3 must be removed from the pipeline. See
Section 2.4, Retracting the AP-3,
for
instructions on retracting the probe shaft and removing the unit from the pipeline.
SECTION 3: MAINTENANCE
12
IOM-009
MODELS: AP-3 and AP-3F
REV: D
13839 West Bellfort Street, Sugar Land, TX 77498
welker.com
Service Department 281.491.2331
