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4.1 Routine Maintenance: SiA Liquid Ends
The maintenance of any Chemical Injection Pump (CIP)/Liquid End, other than an SiA unit is not
covered in this document.
WARNING
: Solar Injection Australia accepts no responsibility should a Liquid End be fitted
to an SiA Drive without first seeking a recommendation from SiA to ensure correct
matching of the Gearmotor, Drive and Liquid End (pump).
4.10 Pressure Seal Grease
Check main pressure seal grease periodically and refill when necessary. This is done by removing
the Lube Plug on the side of the Liquid End and if required, injecting a small quantity of SiA
approved grease.
CAUTION
: If injecting chemicals that cause the lubricant to foam, select an alternative
lubricant compatible with the injected fluid. When it is essential that the injected
chemical must have a high level of purity, use distilled water as the lubricant.
4.11 Injection Chemicals
Ensure the chemicals being injected are clean and free of foreign matter to prevent damage to the
seal and the Liquid End’s plunger assembly. We recommend the installation of a suitable chemical
filter.
4.12 Seals
Check the seals regularly. Seal material and chemical compatibility is paramount. Our standard
plunger seal (TS) is a specially formulated PTFE and stainless steel compound that is energized
with a Viton o’ring, which is compatible with most chemicals, however we do have numerous
alternative materials available, please consult Solar Injection Australia or an SiA Distributor for
further assistance with choosing the right seal or when changing the chemicals you are injecting.
To inspect Seals & Back Ups follow these steps (refer to ILLUSTRATION & PARTS LIST,Page 2):
1. For Simplex pumps, ensure the Liquid End is facing downwards, so that no liquid runs into the
Drive Case.
2.
For all pump configurations unscrew the Pump Connection Ring by hand to loosen and remove
the Liquid End/s.
3.
Carefully remove the Plunger section and place gently on a flat surface.
4. Remove the Flange and the Pump Connection Ring
5. Unscrew the three parts of the Pump Body (Upper, Middle, Lower)
6. Very carefully remove the Back Ups and Seals using either the plunger or a brass or plastic pick.
To use the plunger, insert it into the pump body below the seal and push the seal and back up
out. To use the pick, hook the seal and back up carefully and pull them out.
CAUTION
: Be very careful not to damage the seal or other surfaces when extracting.
7. Replace the Seals and Back ups and then Follow Steps 1– 5 in reverse to complete.