B&C Technologies DP-250 Industrial - Manual (Page 32)

INSTALLATION PROCEDURES
3-18
Figure.3-11 Steam Damper System.
3. Steam Damper Air System Connections
The dryer is manufactured with a pneumatic (piston) damper system which requires an
external supply of compressed air. The air connection is made to the steam damper solenoid valve
which is located at the rear inner top area of the dryer just above the electric service relay box
Air Requirements
Table 3-5 Table For Air Pressure.
Compressed Air Supply Air Pressure
Normal 80 psi
Minimum Supply 70 psi
Maximum Supply 90 psi
Air Connection
Air connection to system 8 mm.
No air regulation or filtration is provided with the dryer. External regulation/ filtration of 80
psi must be provided. It is suggested that a regulator / filter gauge arrangement be added to the
compressed air line just before the dryer connection. This is necessary to insure that correct and
clean air pressure is achieved.
4. Steam Damper System Operations
The dryer steam damper, as. Allows the coil to stay constantly charged eliminating repeated
expansion and contraction. When the damper is opened, the air immediately passes through the
already hot coil, providing instant heat to start the drying process. When the damper is closed,
ambient air is drawn directly into the basket (tumbler), allowing a rapid cool down.