Model H1301 Recovery and Recycling System
Installation, Operation and Maintenance Manual
Revision-L September, 2019
Page 42 of 105
VI. System Operational Description and Component Review (continued)
F. Pump Out Component Review
After completion of the nitrogen vent cycle, the PLC will verify that conditions in the
process tank are ideal for a pump out sequence. Should conditions not be ideal the
machine may initiate additional cooling and vent cycles or additional inlet recovery
operations. The pump out sequence will not commence until the liquid level in the process
tank has risen to the mid-level of the liquid level switch (PLC input #B4 Activates). Or the
source container has been evacuated to a (-10”) Hg vacuum level (PLC input #A6
Deactivates) with at least a low liquid level indication in the process tank (PLC input #B2
Activates), and in either case, a successful final nitrogen venting sequence has been
accomplished.
Once the pump out sequence has been initiated the Nitrogen Supply solenoid valve SV-5
will open (PLC output #A8 Activates). Nitrogen will travel through the manual ball valve
MV-7 and past the emergency pressure relief valve PV-2 (provides overpressure
protection of the Nitrogen Supply components to 300 psi). The flow will continue through
the nitrogen pressure regulator R2 past the regulator pressure gauge G2, through the SV-
5 solenoid valve and CV-7 check valve, and into the vapor space of the processing tank.
After the pressure in the process tank increases to above the Pressure Controller alarm
#1 set point (PLC input #A3 Deactivates) the outlet solenoid valve SV-4 (PLC output #B2
Activates) will open and the outlet liquid pumps LP1 and LP2 will operate (PLC output #B1
Activates). Liquid AGENT will flow from the process tank through the manual maintenance
ball valve MV-4, through the liquid pump particulate filter F6, and into the inlet port of the
LP1 liquid pump. The pump will boost the liquid from the pump outlet into LP2 liquid
pump. The AGENT will travel past maintenance access valve AV-5, through the outlet
solenoid valve SV-4 and outlet check valve CV-6, and out the outlet port. The flow will
continue through the user connection plumbing and into the valve of the receiving
container.
The pump out sequence will end when the liquid level in the process tank drops below
and stays below the low liquid level sensor in the process tank for eight seconds (PLC
input #A7 Deactivates). If the process tank is below low liquid level, and the source
container is at a (-10”) vacuum level, the machine will stop processing and deactivate the
front panel processing lamp. If the source container is not evacuated, the machine will
automatically begin inlet recovery operations again with the processing lamp illuminated.
In the event that the user is manually pumping AGENT out of the machine using the front
panel toggle switches: never pump out for more than 10 seconds after the low level
indicator of the process tank goes out. Enough AGENT must always remain in the
process tank to provide thermal contact for the temperature sensors and internal cooling
coils of the tank.
To Next Page