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138 Series Sterilizers
Operations and Maintenance Manual
&
Original
November, 1996
Daily, check the pressure control switch in
following
the initial procedure
for electric
heat.
Daily, manually actuate the relief handle of
each safety valve, with the steam pressure in
the jacket, to assure that these valves are
operable.
Use
these
preventive
maintenance
procedures to determine the serviceability of
the sterilizer.
If the low water cutoff fails to
actuate
or the water gauge
remains
full,
discontinue use of the sterilizer. Do not use
the sterilizer again until a medical equipment
repair technician is available to restore it to
serviceability.
Under emergency conditions,
an unserviceable unit may be used, provided
that the operator ensures that it contains
sufficient water in the jacket at all times.
Daily, remove the chamber drain plug screen
and
clean
any
lint and
sediment
in the
strainer.
Daily, wash
the
interior surface
of the shell
before heating.
Twice a year, grease the sterilizer door with
a
high-temperature
grease
such
as
Lubriplate 930AA.
7.0
MAINTENANCE
PROCEDURES
7.1
General
: CAUTION
--
When
cleaning
.the
: sterilizer do not use any abrasives. Do
""nöt-use ammoönlia
or chlorine based
cleaners.
Wash
the interior surface of the shell with a
7.2
Operating Valve
The only trouble that can be expected from
the operating valve is leaking of the valve
seat
or
the
stem
packing.
This
rarely
occurs, but may be remedied
by replacing
the defective parts.
Disassemble the valve by first removing the
five body screws.
If the carbon seat is worn,
it should
be
replaced.
Use
care
not
to
damage the seating face of the casting.
When
reassembling
the valve,
ensure
that
the
leg
on
the
stem
fork
labeled
O
is
inserted in the stepped
hole
in the carbon
disc.
The side of the disc with the milled
slot part way through is the seating face and
should be against the face of the valve body.
The valve is off when
the stem
key way
is
45° to the left of the top of the valve as
M_138.DOC
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