4590 Micro Reactors
w w w . p a r r i n s t . c o m
7
Parr Series 4590 Micro Reactors are furnished with two structural options in addition to the size, pressure
range, stirrer motor, controller and similar options. These are:
Fixed Head or Removable Head Vessel Design
In the fixed head design, the head of the vessel
may remain fixed in the reactor support stand. All
attachments to the head, gas and liquid feed and
discharge lines, cooling water, vapor take-off and
condenser, thermocouple, and any electrical leads
can remain permanently in place. The reactor is
opened by removing the split ring sections and
lowering the cylinder away from the head.
In the removable vessel design, the entire vessel
must be removed from the support stand for charg-
ing, product recovery, and cleaning.
There is no difference in the pressure or temperature
limits or basic operating instructions based upon the
fixed head or movable vessel options. There are dif-
ferences in the design of the stand components which
adapt the vessels to the support system.
Flat Gasket or Self Sealing O-Ring Closure
The flat gasket is held in a recess in the vessel
head and a machine pilot on the cylinder closes the
recess to completely contain the gasket. The split
ring closure used with this gasket has six cap screws
which must be tightened to develop the loading on
the gasket.
The self sealing design features an O-ring retained
in a groove on the vessel head. This design is self
sealing and the split ring used with this sealing
system does not require nor have the cap screws
used with the flat gasket.
Maximum temperatures of a given system are
dependant upon the material of construction and
type of seal. Other accessories may limit operating
temperature. The flat PTFE gasket can be used to oper-
ating temperatures as high as 350 °C. The flat flexible
graphite gasket can be used to operating tempera-
tures as high as 500 °C. The maximum temperature of
the vessels equipped with O-ring seals depends upon
the material used for the O-ring. The most common
material is a fluoroelastomer (FKM) which has a 225 °C
maximum operating temperature limit.
Fixed Head with PTFE Gasket
Moveable Head with O-ring Seal & Easy Close Split Ring
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
