- 12 -
4560 Mini Bench Top Reactors
Parr Instrument Company
Revision 6-28-02
HOW TO USE THE VESSEL
(
Continued)
Withdrawing Liquid Samples
Liquid samples may be withdrawn
from the sampling valve attached to the gas
inlet fitting whenever the vessel is
pressurized. Always close the inlet valve
before withdrawing a liquid sample, and
open the sampling valve cautiously because
liquid will be discharged with considerable
force. The optional A579HC discharge tube
may be attached to the sampling valve to
discharge the liquid into an appropriate
receiver. Be particularly careful if the
temperature of the sample is above its
boiling point at atmospheric pressure. If so,
it will “flash” and be lost as soon as it is
released from the vessel. This problem can
be avoided by connecting an optional metal
sample bottle to the valve and collecting the
sample in a sealed container. Incoming gas
can be used to clear the dip tube between
liquid samples so that the next sample
drawn through the tube will truly be
representative of the mixture.
Initial Operating Test
Read all operating instructions
carefully so as to be well acquainted with the
correct procedures for handling the vessel
and for operating the controller and other
accessories. An initial operating test should
be made, with only water, to check the
apparatus before starting the first
experimental runs. For this initial test, fill the
cylinder not more than half full of water and
run the temperature up to 150ºC while
checking the apparatus for leaks and
observing the performance of the
temperature controller.
Internal Cooling Loop
Each Mini Reactor (except the 100
and 160 mL sizes) has a single loop cooling
coil installed in the vessel with compression
fittings on the head for connecting 1/4"
copper or plastic tubing to the loop. (Special
1/8” OD spiral coils can be furnished for 100
mL & 160 mL if required. Due to internal
space limitations these coils are attached
with male connectors on the top side of the
head thereby making the coil captive.) A
slow, continuous flow of cold water through
a cooling loop proves a very effective means
for controlling temperature overshoot in
these reactors, particularly when operating
at temperatures below 150 !C. Water flow
through the loop can be controlled
automatically using a solenoid valve in the
cold water line, and connected to the cooling
socket on the rear panel of the Temperature
Controller. With this arrangement, cold
water will be admitted to the cooling loop
whenever the controller calls for cooling.
If internal cooling is not desired, the
cooling loop can be removed and the
opening in the head can be closed with No.
79HW, 1/8" NPT plugs. Optionally, other
1/8" NPT threaded fittings can also be
installed in the coil openings.
To Next Page
Loading...
Need help?
General
