Abstract: A heat exchanger is provided in which steam locking is prevent and which allows steam condensate generated in heat transfer tubes to quickly flow down into a condensate outlet chamber. The heat exchanger includes a shell (1) in which a plurality of heat transfer tubes (5) are disposed. The shell (1) has an inlet (2) for fluid to be heated through which fluid to be heated flows in and an outlet (3) for heated fluid through which heated fluid flows out. The heat transfer tubes (5) are penetratingly fixed, at their ends, to a tube plate (7). The tube plate (7) has an end face covered by partition chamber cases (8) and (9) provided with a top steam inlet (10) through which steam flows in and a bottom condensate outlet (11) through which condensate flows out.

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 service condition, a cause of a malfunction, or another aspect of a device in a large group of devices to be managed can be analyzed in an accurate and efficient manner. 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 for each cycle of the complete test, and a device that has been found to be malfunctioning is repaired or replaced; and analysis data G, E are created showing a malfunctioning frequency (N) of each of the managed devices (T) on the basis of the test result (Ic) of the complete test that spans a plurality of cycles.

Abstract: Either a complete overhaul for replacing with recommended devices the entire number of devices in a large group of managed devices T, or a partial overhaul for repairing or replacing with recommended devices only those managed devices T that are malfunctioning is selectively performed as an initial overhaul. A complete test involving the entire number of the managed devices T is then periodically performed to determine whether the devices are operating normally or have a malfunction. Any devices found to be malfunctioning during any complete test are repaired or replaced with recommended devices.

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: 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: Disclosed is a system for supporting sales and maintenance activities of steam traps by a seller of the traps to a customer. The system utilizes an aggregating system which effects a step of inputting stored diagnostic result data and model confirmation result data from a diagnostic device which has diagnosed a working condition of each of a plurality of existing steam traps installed in a customer's plant. Based on the diagnostic result data, a first total steam loss amount due to malfunction of steam traps is calculated, the first total steam loss amount comprising aggregation of steam leak amounts of all the existing steam traps. Based on the model confirmation result data, a second total steam loss amount is calculated, which comprises aggregation of differences between inherent steam leak amounts of the existing steam traps under their normal working conditions and inherent steam leak amounts of recommended steam traps under their normal working conditions.

Abstract: A system for supporting sales and maintenance activities of steam traps by a seller of the traps to a customer.

Abstract: In a thermally-actuated steam trap, a valve casing is formed therein with an inlet, a valve chest and an outlet, and a valve seat member is disposed between the valve chest and the outlet. Within the valve chest, there is further provided a temperature control element including two disk-like wall members and a diaphragm member provided between the wall members. The diaphragm member is secured at the peripheral edge to both the wall members, and the inner space formed thereby accommodates an expansible medium. The diaphragm member carries a valve member cooperating with the valve seat member at the side opposite the expansible medium side, and in the central region of the valve member directed toward the diaphragm member is provided a recess portion which becomes deeper as it proceeds toward the center.

Abstract: A steam trap operation detector provided with a vibration detecting section and a arithmetric section. The detecting section includes a probe, a diaphragm for generating ultrasonic vibration in response to mechanical vibrations sensed by the probe and a vibration sensor for converting the ultrasonic vibration into an electrical signal. The detector also includes an arthimetric section for receiving an amplified signal from the vibration sensor and processing the same into information indicative of the operation of the steam trap.