Parr Instrument Series 4530 - Manual (Page 8)

Floor Stand Reactors
P a r r I n s t r u m e n t C o m p a n y 8
IDENTIFY THE VALVES
Gas Inlet Valve
The gas inlet valve is easily identifi ed when the
bomb is open by noting that it is connected to a dip
tube that extends to a point near the bottom of the
bomb cylinder. This is an angle valve with an at-
tached fi tting which provides a socket for attaching
the A495HC pressure hose furnished with the reac-
tor.
Gas Release Valve
The gas release valve is connected to an opening
that will not have any fi tting installed on the un-
derside of the head. Gas released from this valve
will be drawn from the top of the reactor. The gas
release port does include a 1/8
th NPT thread on the
underside of the head where an additional dip tube
or catalyst addition device may be added. If one of
these additions is made to this port then an addi-
tional valve must be added to the gage adapter to
be used as a gas release valve.
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. 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 gas valve momen-
tarily to force any liquid in the dip tube back into
the reactor before withdrawing a sample from the
sampling valve.
Thermocouple
Gas Inlet Valve
Plug (extra port) Coupling for Gas Hose Connection
Gas Release Valve
Liquid Sampling Valve
Adjustable Impeller
Stirrer Shaft Assembly
Adapter Bushings
Stirrer Support Bracket
Dip Tube with Nut
Thermowell
Pressure Gage