Abstract: A monitoring system is disclosed. The monitoring system comprises: a nozzle steam trap (3) including a supply portion (10) into which water vapor is supplied, and a discharge portion (11) which discharges liquid water contained in the water vapor; a temperature measurer (20) that measures a temperature of the discharge portion; a transmitter (24) that transmits temperature information containing the temperature measured by the temperature measurer; a receiver (7) that receives the temperature information; a determiner (8) that determines whether an abnormality is present in the nozzle steam trap based on the temperature information; and a notifier (9) that issues a notice when the determiner determines that the abnormality is present. A first discharge-side reference temperature lower than the boiling point of the water and a second discharge-side reference temperature higher than the boiling point of the water are set for the discharge portion.

Abstract: 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.

Abstract: 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.

Abstract: A monitoring system is disclosed. The monitoring system comprises: a nozzle steam trap (3) including a supply portion (10) into which water vapor is supplied, and a discharge portion (11) which discharges liquid water contained in the water vapor; a temperature measurer (20) that measures a temperature of the discharge portion; a transmitter (24) that transmits temperature information containing the temperature measured by the temperature measurer; a receiver (7) that receives the temperature information; a determiner (8) that determines whether an abnormality is present in the nozzle steam trap based on the temperature information; and a notifier (9) that issues a notice when the determiner determines that the abnormality is present. A first discharge-side reference temperature lower than the boiling point of the water and a second discharge-side reference temperature higher than the boiling point of the water are set for the discharge portion.

Abstract: 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.

Abstract: An orifice nozzle-type steam trap, a Venturi nozzle-type steam trap, and/or a tunnel-structured resistance tube-type steam trap are provided capable of coping with a change in the discharged amount of a drain due to, for example, a variation in the amount of steam used resulting from the operating condition of steam-based equipment, seasonal external factors and/or a variation in the working pressure difference between the inlet and outlet of a steam trap. A strainer filter can be provided that eliminates strength insufficiency due to the miniaturization of strainer screens of these nozzle-type steam traps, retains the forms of the screens, allows the screens to be easily attached to and detached from the strainers, and/or makes maintenance, such as screen cleaning, easy.