Abstract: A steam supply passage incorporates a pressure reducing valve and the passage further incorporates a steam ejector downstream of the pressure reducing valve. A suction portion of the steam ejector is connected to a re-evaporation tank for re-evaporating steam condensate via a suction passage. Passage steam of the pressure reducing valve is used as a driving steam for the steam ejector. In operation, re-evaporated steam within the re-evaporation tank is suctioned by the steam ejector to be mixed with the passage steam. The suction passage incorporates a check valve for preventing reverse flow of steam to the re-evaporation tank.

Abstract: A liquid pressure-feed device is provided wherein a working fluid discharge port can be connected to a liquid generation source side through an external pipe or can be connected to a liquid inlet port of a closed vessel without going through an external pipe. A closed vessel outer opening for opening a working fluid discharge port outwards of a closed vessel is provided and a communication passage for connecting the working fluid discharge port to a liquid inlet port is formed in the closed vessel. When connecting the working fluid discharge port to the liquid generation source side through an external pipe connected to the closed vessel outer opening, a ring member is used to provide closure between the working fluid discharge port and the liquid inlet port and provide communication between the working fluid discharge port and the closed vessel outer opening. Instead, when connecting the working fluid discharge port to the liquid inlet port, a plug member is used to close the closed vessel outer opening.

Abstract: The invention provides a method of diagnosing a system, a method of operating an aggregating system for system diagnosis and an aggregating system for system diagnosis, which are effective for achieving comprehensive and effective system cost reduction. For a target system 1, at least two or more kinds of diagnoses selected from a trap operation diagnosis, a fluid leakage diagnosis, a system improvement diagnosis and maintenance improvement diagnosis are effected in a batch and in reporting the results of these diagnoses in a batch, there are reported an economic advantage MQt? obtained by reduction in a trap-passed seam loss Qt?, an economic advantage MQs, MQp, MQn obtained by reduction in fluid leakage loss Qs, Qp, Qn, an economic advantage Ma obtained by system improvement and an economic advantage Mb obtained by method improvement in a maintenance method.

Abstract: A liquid pressure-feed device is provided wherein, even with a third shaft disposed between a pivot shaft and a second shaft, a sub-arm positioned between the pivot shaft and the second shaft does not obstruct movement of the third shaft. A snap mechanism has a pivot shaft supported within a closed vessel, a float arm and a sub-arm both adapted to rotate about the pivot shaft, a first shaft supported by the float arm, a second shaft supported by the sub-arm, and a spring mounted between the first and second shafts. A liquid discharge valve has a third shaft supported by the float arm, a liquid discharge valve arm mounted to the third shaft, and a liquid discharge valve body mounted to the liquid discharge valve arm to establish and block communication between the interior of the closed vessel and a liquid discharge port. The third shaft is disposed between the pivot shaft and the second shaft and a window is formed in the sub-arm so as not to obstruct movement of the third shaft.

Abstract: Accurate device-condition information of and relating to a number of devices to be managed are collected in an efficient manner. The number of devices to be managed are divided between a direct collection group comprised of some managed devices whose device-condition information are collected by detecting operation by a portable (mobile) unit for device condition detection on each one of these managed devices and an indirect collection group comprised of the other managed devices whose device-condition information are collected by communication between each one of these managed devices and a stationary unit disposed to be capable of detecting the device-condition information of the device.

Abstract: A steam-using facility simulation system for efficiently searching a facility improving approach that is effective in overall improvement of a steam-using facility and a method for searching an approach for improving a steam-using facility are provided. The system includes storage means configured to store steam usage state information of the steam-using facility; input means to which facility improving approach information of the steam-using facility is input; simulating means configured to compute predicted steam usage state information of the steam-using facility after implementation of the improving approach based on the steam usage state information of the steam-using facility stored in the storage means and the facility improving approach information input to the input means; and output means configured to output the predicted steam usage state information of the steam-using facility computed by the simulating means.

Abstract: The object is to facilitate determination of a flow rate of fluid discharged from a discharge opening. Intensity of a supersonic wave generated at and propagated from a discharge opening in association with discharge of the fluid from the discharge opening is determined at a determinate site distant from the discharge opening. And, a propagation distance from the discharge opening to the determination site is determined or investigated. Then, based upon a correlation existent among the intensity of the propagated supersonic wave, the propagation distance and the fluid discharge flow rate from the discharge opening, the fluid discharge rate is obtained from the determined or investigated supersonic wave intensity and the propagation distance.

Abstract: A foreign object in a discharge path defined and formed in a valve case is effectively removed.

Abstract: The invention provides a method of diagnosing a system, a method of operating an aggregating system for system diagnosis and an aggregating system for system diagnosis, which are effective for achieving comprehensive and effective system cost reduction. For a target system, at least two or more kinds of diagnoses selected from a trap operation diagnosis, a fluid leakage diagnosis, a system improvement diagnosis and maintenance improvement diagnosis are effected in a batch and in reporting the results of these diagnoses in a batch, there are reported an economic advantage MQt? obtained by reduction in a trap-passed seam loss Qt?, an economic advantage MQs, MQp, MQn obtained by reduction in fluid leakage loss Qs, Qp, Qn, an economic advantage Ma obtained by system improvement and an economic advantage Mb obtained by method improvement in a maintenance method.

Abstract: The invention provides a method of diagnosing a system, a method of operating an aggregating system for system diagnosis and an aggregating system for system diagnosis, which are effective for achieving comprehensive and effective system cost reduction. For a target system 1, at least two or more kinds of diagnoses selected from a trap operation diagnosis, a fluid leakage diagnosis, a system improvement diagnosis and maintenance improvement diagnosis are effected in a batch and in reporting the results of these diagnoses in a batch, there are reported an economic advantage MQt? obtained by reduction in a trap-passed seam loss Qt?, an economic advantage MQs, MQp, MQn obtained by reduction in fluid leakage loss Qs, Qp, Qn, an economic advantage Ma obtained by system improvement and an economic advantage Mb obtained by method improvement in a maintenance method.

Abstract: A complete test involving the entire number of devices in a large group of managed devices (T) is periodically performed to determine whether the devices are operating normally or have a malfunction; a test result (Ic) is recorded in a management database (Db) for each cycle of the complete test, and a device that has been found to be malfunctioning is repaired or replaced; and the suitability of a device model is determined or a suitable device model is selected for each of the managed devices (T) on the basis of history information (N) about each of the managed devices (T) obtained from the test result (Ic) of the complete test that spans a plurality of cycles, as recorded in the management database (Db).

Abstract: A liquid pressure-feed device having a reduced number of parts and a simple structure is provided. A snap mechanism has a pivot shaft supported within a closed vessel, a float arm and a sub-arm both adapted to rotate about the pivot shaft, a first shaft supported by the float arm, a second shaft supported by the sub-arm, and a spring mounted between the first and second shafts. A float is connected to the float arm and a change-over valve is connected to the sub-arm through a power transfer shaft. There is provided a stopper shaft supported within the closed vessel, there is formed in the float arm a window through which the stopper shaft extends and which restricts a rotational range of the float arm with floating of the float, and there is formed in the sub-arm a window through which the stopper shaft extends and which restricts a rotational range of the sub-arm with descent of the float.

Abstract: An inlet, a valve chest having a diameter larger than that of the inlet, and an outlet are formed in a valve casing. An annular valve seat is formed between the inlet and the valve chest. A valve element for opening and closing the annular valve seat is disposed within the valve chest. A valve stem is projectingly provided on the inlet side of the valve element. A guide member with which an outer periphery of the valve stem comes into sliding contact is provided at inner ends of ribs which project into the valve chest from an inner wall of the inlet. A recess is formed in the valve element to receive therein the ribs projecting to the valve element and also to receive the guide member.

Abstract: The invention provides a method of diagnosing a system, a method of operating an aggregating system for system diagnosis and an aggregating system for system diagnosis, which are suitable for evaluating effectiveness of system improvement. A total receiving steam amount Qi and a total necessary steam amount Qo are grasped. Further, a total amount of steam loss which can be solved by a predetermined system improvement is grasped as a total improvable steam loss amount. Then, based on these respective grasped total amounts, a ration of the total improvable steam loss mount relative to a total unknown steam amount Qx which is a difference between the total receiving steam amount Qi and the total necessary steam amount Qx is obtained as an improvable unknown steam ratio Kts. Or, the unknown steam ratio Kt and an improved unknown steam ratio Kxx or the unknown steam ratio Kx and an apparent improved unknown steam ratio Kxx? is/are obtained.

Abstract: In a steam-heating apparatus in which a heating section formed in a heat exchanger is connected to a steam supply pipe for receiving supply of heating steam and connected also to a condensate-recovering unit for discharging condensate produced as a result of heating, the apparatus includes a steam ejector including a suction chamber connected to the heating section and an inlet for receiving supply of the steam. When the temperature of the heating section or between the heating section and the condensate-recovering unit is dropped by a predetermined value, steam is supplied from the steam supply pipe to the inlet of the steam ejector, and gas in the heating section is sucked into the suction chamber of the steam ejector.

Abstract: In a steam-heating apparatus in which a heating section formed in a heat exchanger is connected to a steam supply pipe for receiving a supply of heating steam and connected also to a condensate recovering unit for discharging condensate produced as a result of heating, the apparatus includes a steam ejector including a suction chamber connected to the heating section and an inlet for receiving supply of steam. When the temperature of the heating section or between the heating section and the condensate recovering unit is dropped by a predetermined value, steam is supplied from the steam supply pipe to the inlet of the steam ejector, and gas in the heating section is sucked into the suction chamber of the steam ejector.

Abstract: In a steam-heating apparatus in which a heating section formed in a heat exchanger is connected to a steam supply pipe for receiving a supply of heating steam and connected also to a condensate recovering unit for discharging condensate produced as a result of heating, the apparatus includes a steam ejector including a suction chamber connected to the heating section and an inlet for receiving supply of steam. When the temperature of the heating section or between the heating section and the condensate recovering unit is dropped by a predetermined value, steam is supplied from the steam supply pipe to the inlet of the steam ejector, and gas in the heating section is sucked into the suction chamber of the steam ejector.

Abstract: A mobile leakage detecting device according to the present invention is provided for simplifying detecting operations of a leak portion and enhancing operational efficiency, and is characterized by microphones for detecting ultrasonic waves generated at a fluid leak portion, an input device for inputting positional information of the leak portion in a searching area detected based on output signals from the microphones, a photograph device for photographing the leak portion, a display device for indicating the positional information inputted by the input device and photographed image information of the leak portion obtained by the photograph device and data processing device for relating with one another and storing the output data from the microphones, positional information inputted by the input device and photographed image information obtained by the photograph device on the same leak portion.

Abstract: The invention provides a method of diagnosing a system, a method of operating an aggregating system for system diagnosis and an aggregating system for system diagnosis, which are effective for achieving comprehensive and effective system cost reduction. For a target system 1, at least two or more kinds of diagnoses selected from a trap operation diagnosis, a fluid leakage diagnosis, a system improvement diagnosis and maintenance improvement diagnosis are effected in a batch and in reporting the results of these diagnoses in a batch, there are reported an economic advantage MQt? obtained by reduction in a trap-passed seam loss Qt?, an economic advantage MQs, MQp, MQn obtained by reduction in fluid leakage loss Qs, Qp, Qn, an economic advantage Ma obtained by system improvement and an economic advantage Mb obtained by method improvement in a maintenance method.