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Thermodynamic steam traps
combine reliability, simplicity and efficiency
of operation.
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With just one moving part - a
hardened stainless steel disc - they give a
blast discharge with clean, tight shut-off.
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Able to withstand superheat,
waterhammer, corrosive condensate, freezing and
vibration.
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The TD trap is the first
choice for removal of condensate from steam
distribution systems.
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Thermodynamic steam traps are
simple, robust and reliable and can operate up to very high
temperatures and pressures.
The trap operates by means of the dynamic effect of flash
steam as it passes through the trap. The only moving part is
the disc above the flat face inside the control chamber or
cap.
On start-up, incoming
pressure raises the disc, and cool condensate plus air is
immediately discharged from the inner ring, under the disc,
and out through three peripheral outlets. Hot condensate
flowing through the inlet passage into the chamber under the
disc drops in pressure and releases flash steam moving at
high velocity. This high velocity creates a low pressure
area under the disc, drawing it towards its seat.
At the same time, the flash
steam pressure builds up inside the chamber above the disc,
forcing it down against the incoming condensate until it
seats on the inner and outer rings. At this point, the flash
steam is trapped in the upper chamber, and the pressure
above the disc equals the pressure being applied to the
underside of the disc from the inner ring. However, the top
of the disc is subject to a greater force than the
underside, as it has a greater surface area. Eventually the
trapped pressure in the upper chamber falls as the flash
steam condenses. The disc is raised by the now higher
condensate pressure and the cycle repeats. |
