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b. The steam supply piping to the dryer must include a 12-inch rise along with a drip trap and check valve.
This will prevent any condensate from entering the steam coil.
c. Flexible hoses or couplings must be used. The dryer vibrates slightly when it runs and this will cause the
steam coil connections to crack if they are hard piped to the supply and return mains.
d. Shut-off valves for each dryer should be installed in the supply line, return line, and drip trap return line.
This will allow the dryer to be isolated from the supply main and the return main if the dryer needs
maintenance work.
e. Install an inverted bucket steam trap and check valve at least 12-inches below the steam coil as
close to the coil as possible.
1) An inverted bucket steam trap with capacity of 1,400 pounds of condensate per hour @ 125 psi is
required for each dryer.
f. A 3/4” vacuum breaker should be installed. This will save energy and provide for the safety of the
operator and maintenance personnel.
g. Water pockets in the supply line, caused by low points, will provide wet steam to the coil possibly causing
steam coil damage. ALL horizontal runs of steam supply piping should be pitched 1/4-inch for every one
(1) foot back towards the steam supply header causing the condensate in the line to drain to the header.
Install a bypass trap in any low point to eliminate wet steam.
STEAM DAMPER SYSTEM