| 摘要 |
The present invention pertains to a condensate trap for a condensing furnace comprising a housing having an inlet adapted to be connected to a condensing heat exchanger, an outlet for flue gas and an outlet for condensate. The housing has a chamber therein, a valve seat defining an opening from the chamber, a float valve in the chamber adapted to close the opening, and a drain orifice in the outlet for condensate forming a dam to prevent negative pressure from undesirably dislodging the float valve from the opening. The drain orifice is constructed and arranged to retain condensate at a level higher than that of the bottom of the valve seat.
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