Fluid Circulation
Fluid Circulation
Circulation Through Reactor
NOTICE
To prevent equipment damage, do not circulate
fluid containing a blowing agent without consulting
with your material supplier regarding fluid
temperature limits.
Note
Optimum heat transfer is achieved at lower
fluid flow rates with temperature set points at
desired drum temperature. Low temperature
rise deviation errors may result.
To circulate through gun
manifold and preheat hose, see
Circulation Through Gun Manifold, page 62.
1. Follow Startup, page 57.
To avoid injection injury and splashing, do not
install shutoffs downstream of the PRESSURE
RELIEF/SPRAY valve outlets (BA, BB). The
valves function as overpressure relief valves
when set to SPRAY
.Linesmustbe
open so valves can automatically relieve
pressure when machine is operating.
2. See Ty
pical Installation, with circulation, page 15.
Rout
e circulation lines back to respective
comp
onent A or B supply drum. Use hoses
rate
d at the maximum working pressure of this
equi
pment.
3. Set PRESSURE RELIEF/SPRAY valves (SA,
SB) to PRESSURE RELIEF/CIRCULATION
.
4. Set temperature targets. See Targets, page 53.
5. Press
to ci
rculate fluid in jog mode until
A and B temp
eratures reach targets. See
Jog Mode, p
age 62 for more information about
jog mode.
6. Press
to turn on the hose heat zone.
7. Turn on the A and B heat zones. Wait until the
fluid inlet valve temperature gauges (FV) reach
the minimum chemical temperature from the
supply drums.
8. Exit jog mode.
9. Set PRESSURE RELIEF/SPRAY valves (SA,
SB) to SPRAY
.
332636C 61
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