Algas SDI Direct Fired 120/60H, Руководство по эксплуатации и техническому обслуживанию

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Maintenance
Algas-SDI Operation and Maintenance Manual
– P/N – 52642
4-23
Liquid inlet valve maintenance procedure
Use Repair Kit P/N: 40764 (see Appendix A for kit details)
NOTE: Vaporizer must be purged and empty of all liquid and vapor prior to performing maintenance on the liquid
inlet valve.
CAUTION
Follow the below instructions carefully to prevent hazardous
conditions. Leak test the entire installation prior to operating the
system.
1. Loosen the four bolts to remove liquid inlet valve cover on the outside of the vaporizer cabinet.
2.
Using a 7/16” end wrench or tubing wrench, loosen and remove the capacity control valve sensing line
fitting on the top of the inlet valve.
3.
With a 1-
1/2” box end wrench (suggest using 6 point), loosen the large nut on the top of the inlet valve
(inlet valve cap)
4.
Loosen the 6 inlet valve flange bolts and remove the inlet valve from the vaporizer through the hole in the
cabinet.
5.
Once the valve is removed from the vaporizer, remove the inlet valve cap (large nut on top) and remove
the spring from the valve.
6.
Remove the valve seat and stem from the valve body and orifice.
7.
After the seat and stem have been removed, using a socket, remove the inlet valve orifice and wipe the
top of the inlet valve orifice with a rag/cloth (one that does not leave lint on surface) or lightly with a
scotch-brite type material to remove any debris and/or oils from the orifice surface.
8.
Replace the O-ring under the orifice (use smallest O-ring from kit). Lightly grease new O-ring before
replacing it.
9.
Once the inlet valve orifice O-ring has been replaced, return the orifice to the valve and tighten
accordingly.
10.
Compare the length of the new stem from the repair kit to the old one that was removed from the
vaporizer to make sure they are the same. It is important to make sure the new valve stem isn’t longer
than the original stem because it might prevent the valve from sealing properly. If needed, use a metal
file to shorten the stem to match the original stem length. New vaporizers are fitted correctly and tested
at the factory to make sure the seat and stem assemblies have the proper length. If the seat and stem
assemblies have been changed in the field without checking the length against the original stem or the
valve was not tested in the shop to ensure it is sealing (see “Water test” procedure below) there is a
chance the stem could be too long and not allow the inlet valve to close properly. If you are uncertain
about the prior replacement history of the valve stem you should ensure the valve is tested in water to
make sure the new stem and seat assembly close fully before returning the inlet valve to the vaporizer.
11.
Insert the new valve seat and stem assembly into the valve body lining up the stem with the hole in the
inlet orifice.
12.
Replace the spring making sure it is centered on the top of the inlet valve seat.