STEAM REQUIREMENTS (Steam Drying Tumblers)

Size of steam service pipe is dependent upon many variables (length, tees, high pressure system, low pressure system, etc.) Specific pipe size

information should be obtained from the steam system supplier or a qualified steam fitter.

STEAM CONNECTIONS (Steam Drying Tumblers)

INSTALLING STEAM SOLENOID VALVE AND MAKING STEAM INLET CONNECTIONS

High pressure machines require a (constant) 80 to 100 psig (5.62 to 7.03 kg/sq. cm) steam service for optimum operation. Low pressure machines require a (constant) 10 to 15 psig (.70 to 1.05 kg/sq. cm) steam service for optimum operation. The following steps outline procedure for installing steam solenoid valve and connecting steam service.

a.Install a manual shut-off gate valve in condensate return line after steam trap for each coil.

b.Connect steam solenoid valve to related steam coil inlet connection with nipples, flex hoses, unions, tee and pressure relief valve. See Figure 24 for a typical installation.

c.Install a gate shut-off valve in steam supply line, Figure 24. Connect shut-off gate valve outlet to solenoid steam valve inlet connection.

aWARNING

The flexible steam hoses connecting the solenoid steam valve to the coil inlets must have a 125 psig (pounds per square inch gauge) (8.79 kg/sq. cm) working pressure. A shut-off gate valve must be installed upstream from the solenoid steam valve. This way, steam can be shut off for maintenance purposes, or in the event the hose ruptures.

The steam solenoid valve must be supported so minimum load is exerted on the steam coil inlet connections.

INSTALLING STEAM TRAP AND MAKING CONDENSATE RETURN CONNECTIONS

Steam trap must be installed and coil outlet connections must be connected to condensate return lines. The following steps outline the procedure for installing steam trap and connecting condensate return lines. See Figure 24 for a typical installation.

a.Connect a flexible hose to each steam coil outlet, Figure 24.

b.Install a strainer to the ends of each flexible hose.

c.Install a steam trap to each strainer.

IMPORTANT: Steam trap must be installed a minimum of 10 inches (25.4 cm) below steam coil outlet connections, see Figure 24.

d.Install a gate shut-off valve to each steam trap.

e.Connect to condensate return lines.

aWARNING

The flexible steam hoses connecting the coil outlet connections and steam traps must have a minimum of 125 psig (pounds per square inch gauge) (8.79 kg/sq. cm.) working pressure. A shutoff gate valve must be installed downstream from each steam trap so the condensate return line can be isolated in event a steam trap requires maintenance.

Each steam trap must be supported so minimum load is exerted on the coil outlet connection.

M412616

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