Graham 1 Series - Section 2 - Installation Instructions; B) Typical Installation of Closed Loop with Total Recovery

Graham Corporation
10
B) Typical Installation of Closed Loop with Total Recovery
This arrangement provides for the total recirculation of the service liquid. A heat exchanger is
added to the system to remove the heat of compression, friction, and condensation from the
service liquid before it is re-introduced to the pump.
The service liquid level in the separator of a total recovery system should be at or slightly
below the centerline of the pump shaft. A provision should be made for a high level overflow.
This will prevent starting the pump while it is full of liquid, which will damage the pump or
overload the motor.
A
E
B
D
L
J
N
M
K
Drain Make-up
Overflow
Cooling
Liquid
Cooling
Liquid Inlet
Process
Inlet
Gas
Outlet
G H
LG
C
F
A- Inlet Check Valve G- Shut-off or Throttling Valve
B- Pressure Gauge
(vacuum gauge for vacuum
service or compound gauge for compressor
service)
H-
J-
K-
Compound Gauge
Liquid Ring Pump
Recirculation Pump (recommended)
C-
D-
Vacuum Relief Valve
(not required for
compressor service)
Level Gauge
L-
Trap or Loop Seal
(required if dis-
charge pressure is above atmospheric
pressure)
E- Separator M- Drain Valve
F- Service Liquid Cooler N- Make-Up Valve
Closed Loop-Total Recovery
Diagram 2