Parr Instrument 4575/76 HP/HT - Manual (Page 8)

P a r r I n s t r u m e n t C o m p a n y
4575/76 HP/HT Pressure Reactors
8
Pressure Gage
Magnetic Drive
Thermocouple
/ Thermowell
Head
Thermocouple /
Thermowell
Cooling Loop
Propellers
Stirring Shaft
Dip Tube
Liquid
Sampling
Valve
Gas Inlet Valve
Gas Release Valve
Fixed Head
Identify the Valves
Gas Inlet Valve
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 has an attached fitting which
provides a socket for attaching the A506HC pressure
hose furnished with the reactor.
Gas Release Valve
The gas release valve is installed on the gage adapt-
er. Gas released from this valve will be drawn from
the head space 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 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.