The present disclosure relates to a condensate trap for a gas furnace for collecting and discharging condensate generated in a heat exchanger and an exhaust pipe, the condensate trap including: a first inlet through which the condensate generated in the heat exchanger is introduced; a second inlet through which the condensate generated in the exhaust pipe is introduced; a first passage through which the condensate introduced from the first inlet passes; a second passage through which the condensate introduced from the second inlet passes; a discharge port through which the condensate, having passed through the first passage and the second passage, is discharged outside; and a backflow prevention device disposed on the first passage and configured to prevent backflow of air, wherein the backflow prevention device includes: a housing; and a core which is movably disposed in the housing, and which in response to an amount of the condensate introduced from the first inlet being less than or equal to a predetermined amount, prevents backflow of the air by closing the first passage.

The invention relates to a gas-liquid separator (2) for separating at least one liquid component, in particular H.sub.2O, from a gaseous component, in particular H.sub.2, the separator comprising at least one container (6) which is supplied with a medium via an inlet (16), at least the liquid component of the medium being separated in at least one container (6) and the separated component of the medium being discharged from the at least one container (6) via a discharge valve (46) with the remaining gaseous component of the medium, in particular H.sub.2, being recirculated into an outflow line (5) via a first outlet (18). According to the invention, in addition to the liquid component, in particular H.sub.2O, a gaseous component N.sub.2 is separated from the medium by the gas-liquid separator (2).

The discharge valve unit includes: a valve case configured to be detachably attached to the housing and including a second reservoir for liquid configured to communicate with the first reservoir when the valve case is attached to the housing; and a second valve mechanism disposed in the second reservoir and including a second discharge hole having a larger opening diameter than that of the first discharge hole and a second valve member accommodated in the second reservoir and configured to open and close the second discharge hole. The second valve mechanism includes a spring configured to bias the second valve member in a valve opening direction. When a pressure of the second reservoir increases to a predetermined value, the second valve member closes the second discharge hole against a biasing force of the spring.

The discharge valve unit includes: a valve case configured to be detachably attached to the housing and including a second reservoir for liquid configured to communicate with the first reservoir when the valve case is attached to the housing; and a second valve mechanism disposed in the second reservoir and including a second discharge hole having a larger opening diameter than that of the first discharge hole and a second valve member accommodated in the second reservoir and configured to open and close the second discharge hole. The second valve mechanism includes a spring configured to bias the second valve member in a valve opening direction. When a pressure of the second reservoir increases to a predetermined value, the second valve member closes the second discharge hole against a biasing force of the spring.

This Venturi nozzle steam trap comprises a body, a strainer, a drain reservoir, and a Venturi nozzle, characterized in that the drain reservoir includes a drain vent of the Venturi nozzle and a non-drain vent, and is disposed in an upper section of a vapor transport piping structure provided with the steam trap, the drain vent is placed in a position lower than the non-drain vent, and a height difference between the drain vent and the non-drain vent is continuously varied by using a rotatable components on the same axis as that of the vapor transport piping structure.

This Venturi nozzle steam trap comprises a body, a strainer, a drain reservoir, and a Venturi nozzle, characterized in that the drain reservoir includes a drain vent of the Venturi nozzle and a non-drain vent, and is disposed in an upper section of a vapor transport piping structure provided with the steam trap, the drain vent is placed in a position lower than the non-drain vent, and a height difference between the drain vent and the non-drain vent is continuously varied by using a rotatable components on the same axis as that of the vapor transport piping structure.

A condensate trap for a furnace system includes a trap inlet configured to receive combusted gases, a condensate chamber coupled to the trap inlet and configured to trap condensate, a trap outlet coupled to the condensate chamber and configured to exhaust the combusted gases, a header box inlet configured to receive condensate from a header box, and a condensate outlet configured to drain condensate from the condensate chamber. Combusted gas that passes through the condensate trap provides heat to condensate within the condensate trap to thaw frozen condensate or to prevent condensate from freezing.

A condensate trap for a furnace system includes a trap inlet configured to receive combusted gases, a condensate chamber coupled to the trap inlet and configured to trap condensate, a trap outlet coupled to the condensate chamber and configured to exhaust the combusted gases, a header box inlet configured to receive condensate from a header box, and a condensate outlet configured to drain condensate from the condensate chamber. Combusted gas that passes through the condensate trap provides heat to condensate within the condensate trap to thaw frozen condensate or to prevent condensate from freezing.

A multiple application orifice steam trap apparatus of the present invention includes: an orifice steam trap that has an orifice hole and is connected to a live steam delivery pipe to prevent leakage of live steam and discharge only condensate water; a back pressure adjustment unit that is connected to the rear end of the orifice steam trap from which condensate water is discharged and adjusts back pressure of the orifice steam trap; and a meter that is disposed at any one of or both between the front of the back pressure adjustment unit and the orifice steam trap or at the rear of the back pressure adjustment unit and measures any one or both of temperature and pressure at any one or both of the front and rear of the back pressure adjustment unit.

A multiple application orifice steam trap apparatus of the present invention includes: an orifice steam trap that has an orifice hole and is connected to a live steam delivery pipe to prevent leakage of live steam and discharge only condensate water; a back pressure adjustment unit that is connected to the rear end of the orifice steam trap from which condensate water is discharged and adjusts back pressure of the orifice steam trap; and a meter that is disposed at any one of or both between the front of the back pressure adjustment unit and the orifice steam trap or at the rear of the back pressure adjustment unit and measures any one or both of temperature and pressure at any one or both of the front and rear of the back pressure adjustment unit.