ICGSMA Bulletin - Indian Coast Guard
ICGSMA Bulletin - Indian Coast Guard ICGSMA Bulletin - Indian Coast Guard
ICGSMA BULLETIN (JAN - MAR 13) The PAC firm M/s Rochem representative visited ship for defect rectification and checked servo control valve found satisfactory. Further VALVE MANIFOLD DISCHARGE PORT defect investigation reveals that LP pressure gauges PI 30, 40 and 50 were flickering and small pulsation in PI 60 was also noticed. This system indicates leaking HP pump inlet valves seat/plunger sealing. The pump valve manifold was dismantled and all valves/valves seats checked for wear down and found satisfactory. HP pump plunger V packing and 'O' rings found defective, same was replaced from OBS. The pump valve manifold was boxed up and plant trials taken. The output increased to 190 LPH at 600 µ cms close to normal readings. CONCLUSION The failure of VS 60 (servo control valve) as indicated by lamp no 4 & 5 and reduced permeate output of RO plant may be occurred by worn out HP pump manifold sealing rings/packing resulting in reduced flow of sea water to DT modules. The symptoms can be seen by pulsation in LP pressure gauges PI 30, 40, 50 and considerably low brine discharge through over board valve. INLET PORT PLUNGER SEALING TROUBLESHOOTING FAX MACHINES AND PRINTERS INTRODUCTION ICGS Androth The basic troubleshooting tips for standard problems with printers, fax machines and copiers are as follows. When in doubt, be sure to contact a trained technician. PREVENTIVE MAINTENANCE * Have the unit cleaned regularly. * When removing a paper jam, always gently remove the paper in the direction it moves through the machine. NEVER “yank” the paper out. * Replace parts an service items when called for. * Replace you ozone filters regularly, if required. *If cleaning “wands” are supplied and required with toners, use them. An insight to trouble shooters 12
ICGSMA BULLETIN (JAN - MAR 13) * Use a surge protector on the power line and the phone line (for fax machines), not just a power strip. SPOTS ON THE PAGE If spots appear on the page, like toner is being “dropped” on the page, the problem is usually the developer unit. The developer unit is seldom able to be rebuilt and should be replaced. DOUBLE IMAGING The main cause of the print being duplicated in areas where they are not wanted is the fuser assembly. An improper combination of toner and drum in a toner cartridge could also be the problem. Faxing a page that has letter head printed with thermal ink may cause the image to be transferred to the rest of the page. PAPER JAMS * Moist paper or specialty paper (checks, slick paper) can cause jams. * A machine dirty with paper dust can cause a jamming problem. Wipe the feed tires and the interior of the machine with a cloth. DARK PAGES * Check to ensure the density is not set for too dark a setting. * The drum may need to be replaced. * The toner cartridge could have a problem. Try replacing to see if that corrects the problem. If it does, notify your supplier. A CASE STUDY- MODIFICATION OF MAIN DA SEA WATER COOLING PUMP FITTED ONBOARD FPV CLASS main DAs of Capacity 120 KW and 01 no Harbour DA of Capacity 80 KW Make: M/s Cummins for power generation and distribution on board. The engine coolant of these DA’s is cooled COMMON PAINT DEFECTS AND REMEDIES (DO YOU KNOW?) CHIPPING - Chipping of paint film is due to excessive use of putty or due to very thick coat of paint or defective surfaces. SOLUTION - Regulate the use of putty and paint. CHALKING - Chalking occurs when ultraviolet rays cause the paint binder to disintegrate. It can happen when interior paints are used for exterior surfaces. SOLUTION - Remove any unstable paint films. Allow the wall to dry thoroughly, and repaint with a recommended paint. Make sure the paint is not adulterated with foreign materials. CISSING - Cissing or tiny craters are caused by oily or greasy surface/due to water based paints being applied over glossy or smooth enamel paints. SOLUTION - Clean the surface thoroughly with soap solution and water. Roughen the enamel paint with Sandpaper or use a barrier coat of matt primer. EFFLORESCENCE - Efflorescence or formation of white powdery deposit on walls after painting is caused due to salts present in the building material like brick and mortar, which surface later on. SOLUTION - Give a long time gap between plastering and painting (about 6 months including one monsoon) Use paint with a porous film like emulsions and distempers. INTRODUCTION BA Waghmare, USE (ER) ICGS SK Chauhan FPV class of ships is fitted with 02 nos of by sea water through sea water pumps. The An insight to trouble shooters 13
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<strong>ICGSMA</strong> BULLETIN (JAN - MAR 13)<br />
The PAC firm M/s Rochem representative<br />
visited ship for defect rectification and checked<br />
servo control valve found satisfactory. Further<br />
VALVE MANIFOLD<br />
DISCHARGE PORT<br />
defect investigation reveals that LP pressure<br />
gauges PI 30, 40 and 50 were flickering and small<br />
pulsation in PI 60 was also noticed. This system<br />
indicates leaking HP pump inlet valves seat/plunger<br />
sealing. The pump valve manifold was dismantled<br />
and all valves/valves seats checked for wear down<br />
and found satisfactory. HP pump plunger V packing<br />
and 'O' rings found defective, same was replaced<br />
from OBS. The pump valve manifold was boxed up<br />
and plant trials taken. The output increased to 190<br />
LPH at 600 µ cms close to normal readings.<br />
CONCLUSION<br />
The failure of VS 60 (servo control valve) as<br />
indicated by lamp no 4 & 5 and reduced permeate<br />
output of RO plant may be occurred by worn out<br />
HP pump manifold sealing rings/packing resulting<br />
in reduced flow of sea water to DT modules. The<br />
symptoms can be seen by pulsation in LP pressure<br />
gauges PI 30, 40, 50 and considerably low brine<br />
discharge through over board valve.<br />
INLET PORT<br />
PLUNGER SEALING<br />
TROUBLESHOOTING FAX MACHINES<br />
AND PRINTERS<br />
INTRODUCTION<br />
ICGS Androth<br />
The basic troubleshooting tips for standard<br />
problems with printers, fax machines and copiers<br />
are as follows. When in doubt, be sure to contact a<br />
trained technician.<br />
PREVENTIVE MAINTENANCE<br />
* Have the unit cleaned regularly.<br />
* When removing a paper jam, always gently<br />
remove the paper in the direction it moves through<br />
the machine. NEVER “yank” the paper out.<br />
* Replace parts an service items when called for.<br />
* Replace you ozone filters regularly, if required.<br />
*If cleaning “wands” are supplied and required<br />
with toners, use them.<br />
An insight to trouble shooters 12
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