Parr Instrument Series 4560 - Manual (Page 9)

Mini Bench Top Reactors
w w w . p a r r i n s t . c o m 9
10. Note the voltage and amperage requirement
stamped on the controller data plate, and then
plug the power cord into an appropriate outlet.
Power for these reactors should be drawn from
a grounded outlet capable of carrying up to the
full current rating of the reactor.
11. If an electric stirrer motor is supplied, turn the
speed control knob fully counterclockwise on
the Reactor Controller, turn on the motor switch
and slightly increase the speed for a short run
to check the stirrer drive system but do not turn
on the heater, put heater toggle switch in center
position (OFF). There must always be a vessel in
the heater when it is turned on, and the vessel
and heater sizes must match. If the heater is op-
erated without proper size vessel in contact with
the heater, the heater may overheat and fail.
Removable Head Shown (Standard Temperature, T316)
Safety Rupture Disc
Gas Inlet Valve
Liquid Sampling Valve
Dip Tube
Stirring Shaft
Lower Guide
Bearing
Adjustable
Impeller(s)
Pressure Gage
Magnetic Drive
Thermocouple
Gas Release Valve
Vessel Water Cooling
Channel
Thermocouple / Thermowell
Cooling Loop
Identify the Valves
Gas Inlet Valve
The gas inlet valve is easily identifi ed when the
vessel is open by noting that it is connected to a dip
tube which extends to a point near the bottom of
the cylinder. With this arrangement, incoming gas is
always introduced below the surface of the liquid.
This valve includes a coupling with an “A” socket
connection for attachment of the pressure hose.
Gas Release Valve
The gas release valve is typically connected to a side
opening on the gage adapter. Gas released from
this valve will be drawn from the top of the reactor.
Liquid Sampling Valve
The liquid sampling valve is attached to the same
fi tting as the gas inlet valve and connected to the
same dip tube. This provides the operator with a
means for clearing the dip tube to be sure that any
sample taken during a run will be representative of
the charge. This can be done by opening the upper
gas inlet valve momentarily to allow the inlet gas to
force any liquid in the dip tube back into the reac-
tor before withdrawing a sample from the sampling
valve.