A steam trap includes a body having a flow passageway therethrough between an inlet connectable to a steam pipeline and an outlet connectable to a condensate drain line. The flow passageway has a first flow restriction defined by a first venturi orifice to pass condensate therethrough while restricting the flow of live steam, and a second flow restriction, downstream of the first flow restriction. The second flow restriction is adapted to allow condensate flow therethrough while restricting the flow of flash steam.

A steam trap includes a body having a flow passageway therethrough between an inlet connectable to a steam pipeline and an outlet connectable to a condensate drain line. The flow passageway has a first flow restriction defined by a first venturi orifice to pass condensate therethrough while restricting the flow of live steam, and a second flow restriction, downstream of the first flow restriction. The second flow restriction is adapted to allow condensate flow therethrough while restricting the flow of flash steam.

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 method for reducing emissions from a vessel includes isolating the vessel from a downstream fluid flow line, purging a fluid from the vessel by injecting purging media into the vessel to push the fluid through a check valve of a vent tubing and into the downstream fluid flow line, and draining the purging media from the vessel. A first end of the vent tubing is coupled to the housing of the vessel, and a second end of the vent tubing is coupled to the downstream fluid flow line. Further, the vent tubing includes a check valve disposed between the first end and the second end, and the check valve is configured to allow fluid to flow from the housing to the downstream fluid flow line.

A method for reducing emissions from a vessel includes isolating the vessel from a downstream fluid flow line, purging a fluid from the vessel by injecting purging media into the vessel to push the fluid through a check valve of a vent tubing and into the downstream fluid flow line, and draining the purging media from the vessel. A first end of the vent tubing is coupled to the housing of the vessel, and a second end of the vent tubing is coupled to the downstream fluid flow line. Further, the vent tubing includes a check valve disposed between the first end and the second end, and the check valve is configured to allow fluid to flow from the housing to the downstream fluid flow line.

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 nozzle-type steam trap including a venturi nozzle, an orifice nozzle, or a tunnel structure resistance nozzle minimizes the outflow of steam even when a pressure difference between a drain-water inlet and a drain-water outlet of each nozzle fluctuates, the steam trap being compatible with any usage environments and enabling maintenance and inspection to be easily performed. The nozzle-type steam trap including the venturi nozzle, the orifice nozzle, or the tunnel structure resistance nozzle includes a means for sealing the nozzle by using a drain water. The nozzle-type steam trap further includes a plurality of steam inflow ports and drain-water outflow ports and includes a closure means for determining, for a selected one of the steam inflow ports and a selected one of the drain-water outflow ports, passages of steam and drain water. More preferably, the steam trap includes a swirl flow formation means in the vicinity of the nozzle.

A nozzle-type steam trap including a venturi nozzle, an orifice nozzle, or a tunnel structure resistance nozzle minimizes the outflow of steam even when a pressure difference between a drain-water inlet and a drain-water outlet of each nozzle fluctuates, the steam trap being compatible with any usage environments and enabling maintenance and inspection to be easily performed. The nozzle-type steam trap including the venturi nozzle, the orifice nozzle, or the tunnel structure resistance nozzle includes a means for sealing the nozzle by using a drain water. The nozzle-type steam trap further includes a plurality of steam inflow ports and drain-water outflow ports and includes a closure means for determining, for a selected one of the steam inflow ports and a selected one of the drain-water outflow ports, passages of steam and drain water. More preferably, the steam trap includes a swirl flow formation means in the vicinity of the nozzle.