SERVICE
MAINTENANCE
No general maintenance is required other than
following the cleaning procedures.
EXTREMELY SLOW COOKING TIME
If the cooking time is abnormally slow, then the
difficulty may be due to insufficient steam pressure
and/or volume. First determine that the pressure on
incoming steam line at kettle is within 5 p.s.i. of the
rated kettle pressure. Note that a pressure approaching
the rated kettle pressure is liable to set off the relief
valve. If the required pressure is available at the kettle,
then possibly the volume of steam is not sufficient.
Minimum 3/
4
" pipe size is required to the kettle but if
the steam generating source is at a great distance from
the kettle, larger pipe will be required. Finally, the core
of the steam supply pipe may have debris or scalants
that impede steam flow and the pipe will require
disassembly and inspection.
DRAW OFF VALVE LEAKS (DRAW OFF
VALVE IS OPTIONAL)
If a leak occurs through the valve stem, replace the "0"
ring. If the leak is due to faulty sealing between the
stem disc and valve seat, this problem can usually be
corrected by cleaning off the dried on food residue with
an extremely fine emery cloth. If the disc or valve
seats are found to be excessively damaged, either or
both must be replaced.
However, if only slight damage to either the disc or
seat has occurred, then the following lapping
procedure should correct it.
A.
Follow cleaning procedures.
B.
Remove the knob handle from the end of the
stem. Unscrew and remove the bonnet from the
stem. Put the knob back on the stem.
C.
Apply a fine grade lapping compound around the
sealing edge of the disc and insert it into the
valve making light contact against seat.
D.
By hand, rotate the stem disc against the valve
seat, allowing the stem to wobble slightly in the
space previously occupied by the bonnet.
E.
Repeat steps C and D several times.
F.
Reassemble, close the valve and test it for leaks.
G.
If leakage persists, then repeat this lapping
procedure.
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Содержание VDLT Series
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