Parr Instrument Series 4570 - Manual (Page 14)

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4570 HP/HT Pressure Reactors Parr Instrument Company
ACCESSORIES
Internal Cooling Coil
A serpentine cooling coil is mounted to the
underside of the head and sealed with a ferrule
and compression nut arrangement.
A slow continuous flow of cold water
through the coil is an effective means for
controlling temperature overshoot, particularly
when operating at temperatures below 150
C.
Alternately, the cooling coil is used to
effectively cool the system at the completion of
a reaction.
An optional solenoid valve package is
available to automate the cooling process.
This package coordinates with the internal coil,
with the water supply and connects to the
temperature control.
If the internal cooling is not required, the
coil may be removed and the alternate plugs
installed.
Liners
Glass (500 °C) or PTFE (250 °C
maximum) liners can be furnished to fit most
Parr reactors. These liners slide into the
cylinder. Although they will not keep
corrosive vapors from reaching the surfaces
of the cylinder and head, they make it much
easier to add and remove liquid reactants,
and they give some protection to the
cylinder when working with corrosive
solutions. It must be noted, however, that
adding a PTFE liner will slow the heat
transfer rate into the vessel, and it may be
necessary to adjust the temperature control
method to prevent overheating.
Liner Part Numbers
Fits
ID
Cylinder
Size Glass
Liner PTFE
Liner
3.75” 1000 mL 1441HC 1441HCHA
3.75” 1800 mL 1442HC 1442HCHA
Spare Parts Kit
Spare parts kits are available for these
reactors. The kits will provide a reserve
supply of parts and tools sufficient to handle
most normal replacements and emergency
repairs during a year of heavy usage.
The kits contain small perishable items
required for continuous operation including
gaskets, bushings, rupture discs and seals.
They can be ordered from any Parr Dealer
or direct from the Parr Instrument Company.
The order must specify the reactor size and
indicate type of rupture disc, stirrer drive
and, whether it has a flat-gasket or O-ring
closure. It is most advantageous to provide
the complete vessel number from the head
or cylinder.
Variable Speed Electric Motor
Reactors are normally equipped with a
DC variable speed motor supplied and
controlled through the Series 4848
controller. Instructions for connecting and
operating these motors are included in the
controller instruction sheet No. 548M. This
motor is usually installed in a drive system
designed to produce stirring speeds from 0
to 600 rpm. Higher speeds up to 1700 rpm
can be obtained by substituting larger
diameter motor drive pulleys.