5 – 1
VSG/VSSG • Installation, Operation and Maintenance Manual •Vilter/Emerson • 35391STG
Section 5 • Maintenance/Service
Maintenance and Service Schedule
Follow this table for maintaining and servicing the compressor unit at hourly intervals.
Table 5-1. Main
te
nanc
e/Se
rvic
e Sc
hedule
Group
Inspec
tion/
Main
te
nanc
e
(2)
Se
rvic
e In
te
rv
al (Hour
s)
(
¹
)
(Ba
sed on dr
y c
le
an g
as)
200
2,500
5,000
10,000
15,000
20,000
25,000
30,000
35,000
40,000
45,000
50,000
55,000
60,000
Oil Circ
uit
Oil Ch
ange
Re
pl
ac
e oil ba
sed on oil an
alysis re
por
t or visu
al c
on
tamin
at
ion.
Oil An
alysis
Oil sampling is rec
omme
nded e
ve
ry 2 t
o 3 mon
ths f
or the
fi
r
st y
ear
. The
re
af
te
r, a
s required, incre
ase
sampling time pe
riod if c
on
tamin
ation o
f oil is unlik
ely or decre
ase sampling time pe
riod if c
on
tami
-
na
tion o
f oil is e
vide
nt. T
ak
e an oil sample an
y time during ope
ra
tion If the
re
’s re
as
on t
o be
lie
ve th
at
the oil is c
on
tamin
at
ed. F
or addition
al in
fo
rm
at
ion on oil, re
fe
r t
o Oil and Oil Flo
w ope
ra
tion.
Oil F
ilt
er
s
(3)
----
R
--
R
--
R
--
R
Oil S
traine
r
IIIIIIIIIIIIII
Co
mp
resso
r
Unit
C
oale
sc
ing F
ilt
er
(4)
----
R
--
R
--
R
--
R
C
oale
sc
ing Drain Line
IIIIIIIIIIIIII
Suc
tion Scree
n
I
-
-
I
-
I
-
I
-
I
-
I
-
I
C
oupling Alignme
nt
and In
tegrit
y
IIIIIIIIIIIIII
Mo
tor (C
ompre
ss
or)
See Mo
tor M
anu
al f
or prope
r lubrica
tion proc
edure
s and se
rvic
e in
te
rv
als.
Co
ntro
l
C
alibra
tion
Tr
ansduc
er
s
IIIIIIIIIIIIII
RT
D
s
IIIIIIIIIIIIII
Sl
ide V
alv
e Mo
to
rs
Slide valv
e calibra
tion should be ins
pec
ted mon
thly
. Ins
pec
tions can be pe
rf
ormed through the
con
trol p
ane
l. If a Non
-Mo
ve
me
nt Al
arm appe
ar
s, calibra
te immedi
at
ely
.
Co
mp
resso
r
(5) (6)
C
ompre
ss
or
(7)
-I-I-I-I-I-I-I
Be
ar
in
gs
-------------
I
I = Ins
pec
t S = Sampling R = R
epl
ac
e
(1) V
ilt
er rec
omme
nds th
at a Pre
ve
nt
ativ
e M
ain
te
nanc
e Program be de
ve
loped b
y V
ilt
er GC (G
as C
ompre
ssion) Se
rvic
e C
en
te
r.
(2) D
aily rec
or
ds should be k
ep
t on suc
tion, disc
har
ge
, oil pre
ssure
s & t
empe
ra
ture
s, along with e
nsuring T
emp L
ea
ving Oil Se
pa
ra
tor is abo
ve De
w P
oin
t.
(3) R
epl
ac
e oil
fi
lt
er
s whe
n pre
ssure drop re
ac
he
s 7 PS
ID (m
aximum allo
wable pre
ssure drop is 15 PS
ID).
(4) R
epl
ac
e c
oale
sc
ing
fi
lt
er
s whe
n pre
ssure drop re
ac
he
s 7 PS
ID
.
(5) The lif
e o
f the c
ompre
ss
or will be incre
ased b
y pur
ging the
compre
ss
or unit with dr
y nitroge
n or sw
ee
t, dr
y n
atural g
as a
t shut
do
wn.
(6) He
ade
r drains should pe
riodically be drained f
or liquid build
-up t
o pre
ve
nt c
ompre
ss
or d
am
age
, see Piping in Sec
tion 3.
(7) Ins
pec
tions inc
lude
: g
at
e ro
tor ins
pec
tion, backl
ash me
asure
me
nt, she
lf c
le
aranc
e, e
nd pl
ay me
asure
me
nt (m
ain ro
tor & g
at
e
ro
tor), g
at
e ro
tor
fl
o
at, slide valv
e ins
pec
tion.
