2000 Hook-up Book

a a Thermo Dynamic Steam Trap with Integral Strainer Spira-tec Loss Detector Figure II-8 Draining Steam Main where Trap must be at Higher Level Steam Main H Set down about 2"

a Condensate Main

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Generous Collecting Pocket

Loop Seal (where “L” exceeds “H”)

In some cases, the existence of other service or process lines alongside the stream main is combined with the need to lift the condensate from the drip point to higher level. Without the loop seal, clearance of condensate from length L and replacement with steam means that for appreciable times steam passes up length H and holds the trap closed, although condensate may be collecting in the pocket. The arrangement shown minimizes this prob lem and gives most consistent performance of the trap.

L

HOOK-UP DIAGRAMS

Figure II-9 Condensate Drainage to Reinforced Plastic Return Line, with Overheat Protection

T44 Temperature Control (set to open at temperature limit of pipe)

High Temperature Drain

On some extended sites, steam distribution is under ground and drip points are inside “steam pits”. Steam main drip traps should dis charge into gravity return systems, but at times it may be necessary to connect them directly to a pumped conden sate line. To avoid failure of plastic or fiberglass piping caused by high temperature from steam leakage when eventually the trap becomes worn, a cooling chamber and control as shown can be used. If the temperature of the con densate leaving the chamber ever reaches the safe limit, the control valve opens. Condensate is discharged above grade, where it can be seen, until its temperature falls again below the limiting value.

Condensate Return Pipe

Cooling Chamber

Steam Main

Main Drip Steam Trap

Diffuser

Check Valve

Spira-tec Loss Detector

Supervised Start-up Valve

Check Valve

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