Parr Instrument Series 4580 - Manual (Page 12)

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IDENTIFY THE VALVES
Gas Inlet Valves
The gas inlet valve is easily identified when
the bomb is open by noting that it is connected
to a dip tube which extends to a point near the
bottom of the cylinder. This valve includes an
adapter which provides a socket for attaching
the A506HC pressure hose furnished with the
reactor.
Gas Release Valve
The gas release valve is installed in a port
without any attachments installed on the
underside of the head. Gas released from this
valve will be drawn from the headspace of the
vessel.
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
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 reactor
before withdrawing a sample from the
sampling valve.
Pressure Gage
Stirring Shaft
Safety Rupture
Disc
Cooling Coil
Dip Tube
Adjustable Impeller(s)
Fixed Head Shown
Liquid
Sampling
Valve
Stirrer Support Bracket
Thermocouple/
Thermowell
Thermocouple
Magnetic Drive
Gas Release Valve
Gas Inlet Valve