B&C Technologies DE Series Commercial - Manual (Page 20)

Important: Insulate all steam and return lines for the safety of the operator and service technician.
Important: All steam components must be rated for a minimum of 200 psi (14 bar) working pres-
sure. Shut off valves must be installed upstream of the steam inlet, and downstream of the steam
trap so that the equipment can be isolated for maintenance or emergency.
Important: Support all steam lines and components to minimize the load on the steam connections
to the dryer.
Obtain steam service piping from a steam system supplier or a qualified steam fitter.
Use a minimum of 12 inch (300mm) rise above the header to prevent condensate from draining
into the dryer. Do not make a steam connection to the header with a horizontal/downward facing
tee or elbow.
Wherever possible, horizontal runs of steam lines must gravity drain to the steam header. Water
pockets or improperly drained headers will yield poor results due to wet steam.
Install a union and valve in the steam supply and return lines for ease of service.
For best performance, install an inverted bucket trap with strainer and a check valve. Avoid ther-
mostatic traps. For best results, install the trap at least 18 inches (450mm) below the inlet and as
close to the machine as possible. Install the trap according to the instructions with the unit, noting
the steam flow direction. If the steam is gravity returned to the boiler, install a vacuum breaker
and check valve in the return line near the machine. Note that all return plumbing must be below
the return inlet.
To prevent eventual water hammer, route all return lines below steam outlets.
Table 3.1: DE Series Steam Condensate Loading
Steam Pressure Machine
DE-30 DE-50 DE-75 DE-120 DE-170
60 PSIG 904.7 99.5 lbs/hr 143.7 lbs/hr 221.1 lbs/hr 414.5 lbs/hr 607.9 lbs/hr
70 PSIG 898 100.2 lbs/hr 144.8 lbs/hr 222.7 lbs/hr 417.6 lbs/hr 612.5 lbs/hr
80 PSIG 891.9 100.9 lbs/hr 145.8 lbs/hr 224.2 lbs/hr 420.5 lbs/hr 616.7 lbs/hr
90 PSIG 886.2 101.6 lbs/hr 146.7 lbs/hr 225.7 lbs/hr 423.2 lbs/hr 620.6 lbs/hr
100 PSIG 880.8 102.2 lbs/hr 147.6 lbs/hr 227.1 lbs/hr 425.7 lbs/hr 624.4 lbs/hr
125 PSIG 868.3 103.7 lbs/hr 149.7 lbs/hr 230.3 lbs/hr 431.9 lbs/hr 633.4 lbs/hr
3.5 Steam Damper
The DE-120 and DE-170 are manufactured with a pneumatic (piston) damper system which re-
quires 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. See Table 3.2 on page 18 for details.
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