Parr Instrument Series 4590 - Manual (Page 10)

4590 Micro Reactors
P a r r I n s t r u m e n t C o m p a n y 10
IDENTIFY THE VALVES
Gas Inlet Valve
The gas inlet valve is easily identified 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
fitting as the gas inlet valve and connected to the
same dip tube. With this arrangement, incoming gas
is always introduced below the surface of the liquid
and the operator is provided with a means for clear-
ing 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 reactor before
withdrawing a sample from the sampling valve.
Thermocouple
Magnetic Drive
Gas Release Valve
Liquid Sampling Valve
Gas Inlet Valve
Safety Rupture Disc
Pressure Gage
Standard Head Fittings for Micro Reactor