Page 30 of 56 Pages
t
1
= Approx. 20 minutes
t
2
= 5 minutes
t
3
= 10 minutes
TIME
P
R
E
S
S
U
R
E
(
k
P
a
)
Ambient Pressure
P
3
P
1
=17
kPa
P
1
= lowest pressure level, which is equal to or lower than
the
level set for the cycle, during the air removal and
steam penetration stage
p
2
= pressure after a period of 300 s
p
3
= pressure after a leakage time of 600 s
P
2
t1
t2
t3