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d. Shut-off valves for each dryer should be installed in the supply, return, and drip trap return lines. This will
allow the dryer to be isolated from the supply and return mains if the dryer needs maintenance work.
e. Install an inverted bucket steam trap and check valve for each unit at least 12 inches below steam coil as
close to the coil as possible.
1. A trap with a capacity of 1,000 pounds of condensate per hour at 126 psi is needed for each unit.
f. A 3/4" vacuum breaker should be installed for each unit in the piping. This will prevent the condensing
steam from causing a vacuum inside the coil and possibly damaging the coil.
g. The supply and return lines should be insulated. This will save energy and provide for the safety of the
operator and maintenance personnel.
h. Water pockets in the supply line, caused by low points, will provide wet steam to the coil possibly causing coil
damage. ALL horizontal runs of steam supply piping should be pitched 1/4 inch for every one (1) foot back
toward the steam supply header causing any condensate in the line to drain to the header. Install a bypass
trap in any low point to eliminate wet steam.
IMPORTANT: Flexible hose and couplings must be used. Coil failure due to hard plumbing connections
will VOID THE WARRANTY.