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VL SERIES STEAMER - SERVICE PROCEDURES AND ADJUSTMENTS
Pa
g
e 37 of 88
STEAM GATE VALVE(S)
On all models, each cookin
g
compartment has its
own mechanical steam
g
ate valve that supplies
steam to the cookin
g
compartment when the steam
control arm handle is pulled forward. The Prevent
models use a solenoid valve to exhaust steam from
the compartment whereas the Automatic, Standard
and Manual models use an additional steam
g
ate
valve to exhaust steam when the steam control arm
handle is returned to the rear. These
g
ate valves are
a standard type and can be disassembled for
cleanin
g
and
g
asket replacement.
If steam leaks are noticed around the packin
g
nut
and stem durin
g
cookin
g
, ti
g
hten the packin
g
nut
until the steam leak ceases. Release steam control
arm to ensure its automatic return. If arm does not
return freely or steam is still leakin
g
, then further
inspection or adjustments are necessary. Turn the
timer and compartment power switch OFF and
blowdown the boiler. Remove the control arm
bracket and packin
g
nut from the stem and clean
out the old strin
g
packin
g
. The valve stems may
then be re-packed usin
g
a strin
g
packin
g
suitable for
steam service.
Replace the packin
g
nut and control arm bracket.
Ti
g
hten the packin
g
nut fin
g
er ti
g
ht plus ½ turn and
check for proper operation. If steam continues to
leak, ti
g
hten the packin
g
nut in additional ½ turn
increments until it stops and re-check operation of
the steam control arm.
NOTE:
Do not over ti
g
hten packin
g
g
lands, the
linka
g
e system must be free enou
g
h for the sprin
g
to return the steam control arm to the fully closed
position.
For other service to these valves, remove the stem
assembly and cap at the top of the valve. Check the
valve linka
g
e for loose or bindin
g
parts.
The steam
g
ate valve linka
g
e for these controls are
simple and there function easily seen. The inlet and
exhaust steam
g
ate valves must be positioned so
the inlet valve is open and the exhaust valve closed
when the steam control arm handle is pulled forward
and reverses when the control arm is released.
NOTE:
In the event of an electrical component or a
power failure, the steam control arm can be
operated manually on automatic models.