Theory of operation
Puritan Bennett™ 700 Series Ventilator System Service Manual
10070389 Rev. A
2-73
Figure 2-59. Pneumatic diagram of exhalation and piston retraction (low-flow oxygen solenoid energized)
E
x
haust port
Air
O
xygen
Ox
y
g
e
n
s
o
le
no
id
s
O
xygen
Sa
fe
ty
Ox
yge
n
Ou
tle
t
Cyli
nder
Pis
ton/
cy
lin
der ass
y
Inl
e
t
Motor
/
Exh
a
lat
ion
Ther
mi
st
or
Exh
a
la
ti
on
In
spir
a
tory
To pat
ient
Exh
a
lat
ion
PEE
P
Je
t
Fi
lter
PE
EP
chec
k
valv
e
se
nsor
regulato
r
int
a
k
e
fil
te
r
Mixi
ng
ch
ec
k
valve
re
gu
la
tor
pr
es
sure
tr
an
sduc
e
r
enc
o
der
sol
e
n
o
id
fil
te
r
E
xpi
ra
tor
y
filt
er
Col
lector
vi
al
p
re
ssur
e
tr
an
sduc
e
r
aut
o
ze
ro
solenoi
d
Exhalati
on
pre
ssu
re
tr
ans
ducer
a
u
to
ze
ro
solenoi
d
re
se
rv
oir
ventu
ri
val
v
e
a
ssy
Heat
er
as
sy
fl
ow sensor
pum
p
va
lv
e
ma
ni
fo
ld
O
xygen
bl
e
e
d
2 L/
min
T
h
e
rmi
sto
r
PRESSU
RE SO
LENO
ID
PCB
Am
b
ie
n
t a
ir
H
igh-pr
e
ssure
o
xygen
Mi
xed g
a
se
s
PEEP/
CPAP
p
ilo
t pr
es
sur
e
33 ±
5 psi
(227.46
±
34.48
kP
a)
10/
1.4 c
m
H
2
O
Ox
yge
n
fi
tti
n
g
40
-9
0 ps
i
(2
75-
62
0 kPa)
Exh
a
le
d gas
L
o
w-pre
ss
ure
o
xygen
150 L/m
in
150
L/
min
150
L/m
in
15
0 L/
min
(w
hen oxyg
en
solenoi
d
is of
f)
Exhalat
ion
check
val
v
e
7-
00133
R
e
stri
ct
or
Summary of Contents for Puritan Bennett 700 Series
Page 1: ...Service Manual Puritan Bennett 700 Series Ventilator Systems TM...
Page 439: ......
