Evening star., 1959-12-11

Corning normal, or thermometric
glass previously approved BY
The Director Of Public Health.
eter for pasteuTization apparatus.
SO .504.1 .14l. Case. Moisture-proof
under operating conditions exist
ing in pasteuriZing milk plantSl.
S-b BOA .l42 Scale, Range Of 1909
TO 1902 Fahrenheit or, in case Of
l5-second pasteurization, 145o to
Of scale on either side permissive;
graz ated in Il temperature-scale
d .onsr spaced not less than
is Inch apart, and time-Scale di-
visions Of not more than 10 min
utes: having q chord or straight-
line length Of not less than one.
and 1852 Fahrenheit or, in the
case Of 15-second pasteurizstion,
between 1902 and 1882 Fahrenheit:
Provided, That on Yats used solely
for 30-minute pasteurization Of
products at temperatures above
1902 Fahrenheit. % divisions may
apart, with temperature accuracy
minus. SO .5O4 .i45. Temperature
accuracy Within ls Fahrenheit,
plus or minus, between l429 and
and 145a Fahrenheit, or, in the
case Of 15-second pasteurization,
between 1909 and 1852 Fahren=
be tested by the Director Of Pub
lie Health upon installation. and
before use. S-6 5O4 l44 Time ac-
curacy The recorded elapsed time.
as indicated by the chart rota-
ton, shall not exceed the true
elapsed time, as shown by an
accurate watch, over a period Of
at least 80 minutes at pasteuriza-
tion temperature. All recorders,
except those used as recorder
controllers for miik-fiow stops,
shall be equipped with spring.
operated clocks, which may, how
ever, be electrically wound. The
the Director OF Public Health
upon installation, and before use.
s-6.504 l45. Pen-arm setting de-
vice. Easily accessible: simple to
adjust. S-6 .504 146. Pen and
chart paper. Designed to give line
not over one-fortieth Of an inch
thick when in proper adjustment.
s5ifa s 5o4 shs be 4sy,If. s2sy to ma1stn s2stsm
(bulb, tube. spring, etc.). Pro-
tected against damage at bulb
temperature of 220a Fahrenheit.
S-6504.14S. Stem fitting. Pres
sure-tight seat against inside wall
OF holder or pipe; no threads eX-
posed to milk; location Of seat N
batch-type pasteurizers to con-
form to that Of a 3-A STANDARDS
Chart speed. The chart shall make
one revolution IN not more than
- hours, and shah be graduated
for maximum record Of IL
hours. The rotating chart-support
shall be provided with a pin to
puncture the chart in q manner
to prevent its fraudulent rotation.
S-6 .504.15. Milk-how stops for
automatic pasteuriZers. S-6.504.
flow stops are devices which stop
the forward flow of milk when
ever its temperature drops below
the required limit. in case the
thermostat or the heat source
fails. Such devices include milk
pump stops that automatically
start and stop the milk-pump mo-
tors at the required temperature:
and how.diverSion valves that au-
tomatically divert the milk back
to the heater when II drops below
tho required temperature. and
automatically resume forward flow
when II again reaches the re-
uuired temperature Milk flow
stops shall be so designed that
failure Of the primary motivating
power will automatically stop or
divert the flow. S-6.504 .l52. Re-
cording instrument. Shall comply
with paragraph s-6.50414. Sc.
5O4.lh3 Controller element. Ac-
tuated by same bulb system as
recorder pen, but cut-in and cut
out response shall be indeDendent
Of pen-arm movement 504.
l54. Controller adjustment. Mech
anism for adjustment Of response
temperatures shall be simple, and
ting cannot be changed. or the
controller manipulated This shall
be done by providing for the sp-
plication Of seals which shall not
be removed without Immediately
notifying the Director OF Public
Health. SO. .504 1855. Thermo-
metric lag. When the recorder
controller spnts bulb r,.L.td Is at room tempsT-
stirred water bath at 70 Fahren-
heit above the cut-in point, the
interval between the moment
when the recording Thermometer
reads l2' Fahrenheit below the
cut-in temperature and the mo-
ment Of power cut-in shall not be
more than 3 seconds. The ther-
momstrie nn2T.d,,n. u lag q II! the reeoTdeT-
the Director Of Public Health upon
installation before use, and en-
tered on the chart. Sc. .504 156.
Response time. The interval be-
tween the moment Of power cut
out during descending teHpera-
lures and the moment when the
forward flow Of milk ceases shall
not exceed ] second. The re-
sponse time shall be tested by the
ntFORFnF ~
installation, and before use SO.
5O4 1877. Record Of milk fiow. An
additional pen shall be provided
to record upon the chart a fun
record Of the time during which
the milk-flow stop is in the for
ward-fow position. S-6 5O4 15S.
Flow-diversion valves. Flow-diver-
sion valves shall comply with the
following specifications: (a) For
ward fiow OF subtemperature mix.
due to the omission or iarrInF
loose Of the connecting clip, shau
be avoided by making the valve
and its actuating mechanism in
teRral: or. II there is a CONNECTING
device. by making 1t impossible
to assemble the valve and its &C.
tuating mechanism except in such
or. II there is q connecting device
which may be omitted or shaken
loose. by providing for pushing
instead Of pulling, the valve to
the diverted position; or BY pro-
viding that the pump will shut
down when the milk is below the
pasteurization temperature and
the valve is not in the fully ,di-
verted position; or by any other
equally satisfactory means. Gbl
Il shall be impossible to tighten
the stem packing to such an ex-
tent as to prevent the valve from
assuming the fully diverted posi-
tion. (cD A leak escape shall be
installed on the forwa1d-fiow side
Of the valve seat. However, If
back pressure is exerted on the
seat while the milk flow is being
diverted, the leak escape shall lie
between two valve seats. or be-
tween two portions of the same
seat, one upstream and the other
downstream from the leak escape.
The leak escape shall be so de-
signed, and the valve so installed.
outside, I'D The closure of the
forward-flow seat shall be sum
GENTLY tight so that leakage past
L Will not exceed the capacity Of
the leak-escape device: as evil
denced when the forward-flow
line is disconnected: and in order
that proper seating may not be
disturbed, the length Of the con-
Meeting rod shall not be adjust
valves shall be tested by the. Di-
rector Of Public Health for leakage
upor installation. and before use.
S-6.504 . Dissemination by 30
Minute Holding S-6 .504 81. Time
and temperature. control for manu-
al-discharge systems equipped for
The holder shall be so designed
that the simultaneous temperature
difference between the milk at the
center Of the holder vat and the
coolest milk in the vat will not
exceed i Fahrenheit at any time
during the holding period. The
holder os.ar. shall 3 be dg provided e.r' WITH fi51
throughout the holding period.
ADEQUATE agitation" is agitation
so designed as TO sweep the milk
currents effectively through all
zones occupied BY the milk, in
cludine the outlet port, but ex-
Guiding inlet or outlet pipes
surrounded BY mix In the pro-
10 the holder at the bottom, No
batch Of milk or milk products
shall be ras.eurized unless II
covers a suficient rCrtion Of the
sgitator to assure adequate agita-
tion. S-6.5O4.212. Location and re-
uuired readings Of indicating and
recording thermometers. Each
manual-discharse holder shall be
equipped with both an indicating
and recording thermometer:
Provided. That Thermometer
equipment may be transferred
from one holder TO another II the
required Thermometer equipment Is
In place on each holder during
the entire filling. heating. holding.
and emptying periods. Said ter
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