Fluid Circulation
32 309812D
Fluid Circulation
Circulation Through Reactor
To circulate through gun manifold and preheat hose, see
page 33.
Use this procedure to purge air from pumps, heat-
ers, and lines.
WARNING
Read warnings, page 8. Do not circulate fluid contain-
ing a blowing agent without consulting with your mate-
rial supplier regarding fluid temperature limits.
1. Load fluid with feed pumps, page 25.
WARNING
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. Lines must be open so valves can automati-
cally relieve pressure when machine is operating.
2. Route air purge lines back to respective compo-
nent A or B supply drum. Use hoses rated at the
maximum working pressure of this equipment.
See F
IG. 1, page 10.
3. Set PRESSURE RELIEF/SPRAY valves (SA,
SB) to PRESSURE RELIEF.
4. Circulate fluid with feed pumps until air is purged
through pumps.
5. Set PRESSURE RELIEF/SPRAY valves (SA,
SB) to SPRAY.
TI3593a
SA
SB
BA
BB
TI3591a
SA
SB