Liquid Expansion Steam Trap - How It Works
The Liquid Expansion Steam Trap senses condensate temperature and opens
to allow flow only when the condensate temperature is below the setpoint,
well below saturated steam temperature. The condensate forms a liquid
seal ahead of each steam trap preventing live steam losses. Also,
the sensible heat in the condensate between steam temperature and
the trap discharge temperature is used for heating. These steam traps
have an open temperature factory set at 40 deg F up to 200 deg F.
It has a very small orifice and will not respond to verying loads,
thus it limits is application range.