PS Magazine - JUNE 1986
PS, The Preventative Maintenance Monthly
ISSUE 403
JUNE 1986
Fire ContRol InsTrumenTs .
.±
THER'S
NOTHInq
Mre
Us±L²³´ 1N A FIµ
COntol i¶·¸um¹º»
1"S
a¼ f½Gg£ ¾
¿À ÁÂÃ Ä
FU±GUs!
If you don't keep your instruments
free of Moist air, the moisture builds
up and ruins a lot of exPensive-and
vital-equipment.
²At³
WhY yÅÆÇ !ÈÉÊ
ËÌ ÍÎÏ ÐÑ PVÒQÓ ÔÕD
CRcE
Öv×Ø qÙ dÚÛ-
ÜÝ c€Þ ßàáâãäå
f
wæçè éêë ìííî
To purge and charge the right way,
you need the right stuff:
•SC 4931±95±CL±²54 lists equip³
men´ needed to purge and charge.
µ ¶· 750±116 and your instru¸
men´'s T·'s tell you hoW to purge
and charge mos´ fire con´ro¹ instrU³
men´sº
µ
»urging kit¼ NSN 4931½00½¾65½
1110º
µ¿heck out your
ïðñ,
À20 and
±20» T·'sº Some T·'s have info on
purging and charging equipMent aÁd
how ´o use i´.
NiTRogen cyl²nders aRe gRay wiTh
³wo black bands-don'T use any
oTher k²nd. Before AccepTing a
cyl²nder for puRg²ng, make suRe ´T
has a CGµ 580¶ser²es valve· ¸T Has
righT¹Hand ²nTernal ThReads·
ºHe big cau³ion: Never drop The
cyl²nder. ¸T could explode. You also
need plenTy of venT²laT²on wHen
puRg²ng and chaRging. ºoo much
niTRogen can k²ll you.
22
Jòóô 86
õçkí öë÷í øù úû÷kü
LiÂe uà your stuff AÂd check it out
býþÿý
you start Ãurgingº
µ Take the vAÄve Ãrotectio cap
off the cyÄiÂDer aÂD quicKÄY oÃe aÂd
cÄose tHe vaÄveº THis gets RiD of dust
or wateR i the VAÄve seatº
Åf
ÂothiÂg
HAÃpeÂs,
eitheR
tHe
cYÄinDerÆs eÇptY or tHe vAÄve steM is
stucK closedº Èf You sÇeÄÄ soÇethiÂg,
youÉve got tHe wRoÂG cyÊiÂDer, Écause
nitroge Has Âo odoRº EitHer wAY, Get
a Âew cYÄiÂDeRº
µ ·ouÂt
the
reGulator
oÂ
tHe
cyÄiÂDeR aÂD tHe Hose o the ReguÄa³
torº
Ëou'Äl ÂeeD 9 / ÌÍÎ
AÂd
ð
ÏÎiÂ
wreÂcHes, But DoÂÉt ÃÄaY gorilÄa
with tHeǺ The brass tHReaDs caÂÉt
taKe itº Ðoth gaGes o tHe ReguÄator
sHould reaD zeRoº
the cYÄiÂdeR valve sÄowÄY uÂtil tHe
HighÎÃRessuRe gage Âeedle stoÃs ÇovÑ
iÂG
AÂd tHe vAÄve is wiDe
oÃeº
ÒHere tHe ÂeeDÄe stoÃs teÄÄs You tHe
ÓÔÅ of the gAs iÂsiDe tHe cYÄiÂderº
THe ÂuÇBeR sHouÄd Be equaÄ to or
ÂeAr tHe seRvice Ãressure stAÇÃeD oÂ
tHe cYÄiÂdeR ( Ì,8¾¾ÎÕ,¾ÌÖ oR Õ,ÕÍÖ)º
hig´ preµµure
gage muµ¶
read more
¶´a· ¸00 P¹º
Åf the ÃRessuRe is ̾¾ ÓÔÅ oR Äess×
get aÂotHeR cYÄiÂDeR fRoÇ suÃÃÄYº
Ëou caØÉt Do a Good joB At Äow ÃresÙ
suReº ÚeveR dRai tHe cYÊiÂdeR BeÄow
1¾¾ ÓÔI eitHerº THe ÃressuRe Helps
keeà diRt aÂD wAteR out of tHe cYÄiÂDerº
µ Åf you've got good high pressure,
slowlY ope the reGuÄatoR vaÄve uÂtiÄ
the low pRessuRe gage Reads ̾ ÓÔIº
The close tHe vaÄve quicKlyº THis
blows wateR, dust, spiders, etcº, out
of the hose, so tHeY doÂÉt get pusHeD
iÂto your iÂstruÇeÂtº
µ Ûlose
the
Regulator
vaÄve
by
Ā÷í éûë öë÷í éûëā÷í ĂíçăĄ?
turning i´ counter±cÄockwiseº Open
NeeÜ an adaÃteR? Ýot ÃoRt caps oR
JąĆôć6
23
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