The Experts below are selected from a list of 138 Experts worldwide ranked by ideXlab platform
Stan Shiels - One of the best experts on this subject based on the ideXlab platform.
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Applying mechanical Seals to centrifugal pumps
Stan Shiels on Centrifugal Pumps, 2004Co-Authors: Stan ShielsAbstract:To optimize Seal application it is necessary to know the fluid characteristics and the pump hydraulic specification. In addition, knowledge of the pump operating envelope and the potential variations in Seal cavity fluid condition associated with the extremes of suction and discharge conditions must also be known. The key areas affecting the success of a mechanical Seal application in a centrifugal pump are—the hydraulic characteristics of the pump; the variations of conditions which the pump and Seal will encounter; and the flushing arrangements used to control the Seal environment; and the Seal design. The two primary areas of mechanical Seal application for a centrifugal pump are—control of the environment in which the Seal must operate and the selection of the correct mechanical Seal. The correct Seal design involves an understanding of the constraints imposed within the process. It also requires knowledge of the extremes of pump operation and how these extremes reflect on the potential Seal cavity conditions, so that flushing arrangements can be tailored to optimize the Seal environment. The ultimate responsibility should lie with the pump user, as the Seal Vendor cannot be expected to predict the range of conditions the Seal will be exposed to. Only when pump operation, including all potential transient conditions, is reviewed, can a mechanical Seal application be optimized.
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Chapter 27 – Failure of mechanical Seals in centrifugal pumps: Part one
Stan Shiels on Centrifugal Pumps, 2004Co-Authors: Stan ShielsAbstract:Publisher Summary To arrive at the true cause of Seal failure it is usually necessary to perform one or more of the following tasks—review the pump's design, review the piping system and vessels, define the fluid characteristics, understand the pump's operating envelope and process transients, review the pump's start-up procedure, review the pump's repair procedures, review the mechanical Seal design, and review the mechanical Seal flushing arrangement. This chapter deals with the first three potential areas of concern. While inspection of parts of a failed Seal often reveals some clues as to the condition of the Seal at or preceding the time of failure, the events that create this condition are more often linked to the true cause of failure. Since the mechanical Seal Vendor who may be asked to replace or repair the Seal, is seldom cognizant of the potential conditions that prevailed preceding failure, it is asking much of them to provide a conclusive diagnosis of failure. Much of this analysis, therefore, rests with the pump user, who may work with the Seal Vendor/repairer in determining the root cause.
C Mitchell - One of the best experts on this subject based on the ideXlab platform.
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WSDOT INTERMODAL DATA LINKAGES FREIGHT ITS OPERATIONAL TEST EVALUATION FINAL REPORT PART 1: ELECTRONIC CONTAINER SealS EVALUATION
2002Co-Authors: M Jensen, M Williamson, R Sanchez, A Newton, C MitchellAbstract:In mid-1999, in response to the U.S. Department of Transportation's (USDOT) request for participation in the Intelligent Transportation Systems (ITS) Intermodal Freight Field Operational Test (FOT) Program, the Washington State Department of Transportation (WSDOT) entered into a partnership with public and private organizations to test and evaluate ITS solutions for an "Intermodal Data Linkages ITS Operational Test". As the main element of this test, electronic intermodal container Seals (E-Seals) were tested and evaluated in two scenarios: (1) to support U.S. Department of Agriculture (USDA) operations concerning in-bond shipments of containerized produce shipments being moved by truck from the Port of Tacoma across the international border into British Colombia, and (2) to support U.S. Customs (USCS) operations in tracking in-bond auto parts shipments via container ships from Japan to the Port of Tacoma, and then being moved by truck from the Port of Tacoma across the international border into British Colombia. SAIC served as the "Independent Evaluator" for this deployment. This report presents a discussion of the SAIC Evaluation Team findings from the deployment experience. The results of this evaluation, along with corresponding conclusions and recommendations, are detailed in this report. Several key conclusions are summarized as follows: The concept of a disposable, low-cost E-Seal technology was confirmed. Considering the system was the first prototype E-Seal system tested in an operational environment within the United States, the system performed well. The test validated the E-Seal operational concept across two different intermodal freight supply chains. (1) Technology challenges early in the test were successfully overcome. As the FOT began, the original E-Seal design faced challenges with broadcast speed being too slow to read moving trucks. Through cooperative efforts between the system integrator and the E-Seal Vendor, the system was successfully re-engineered to broadcast at a sufficiently increased rate to support roadway speed conditions. (2) The flexibility exhibited by the stakeholders was key to the test's success. USDA and Maersk Sealand modified the initial procedures early in the test to accommodate initial operational problems. Additionally, Westwood Shipping undertook several activities to shield its customers from any disruptions and worked with a new motor carrier (as did USDA and Maersk Sealand) to ensure the test would occur within the time constraints. This report is Part 1 of two reports. A second volume of this report entitled, "Part 2: Freight ITS Traffic Data Evaluations," is being published separately. Part 2 covers two additional projects evaluated as part of the WSDOT Intermodal Data Linkages FOT; however these two projects are not technically related to or integrated with the E-Seal deployment.
M Jensen - One of the best experts on this subject based on the ideXlab platform.
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WSDOT INTERMODAL DATA LINKAGES FREIGHT ITS OPERATIONAL TEST EVALUATION FINAL REPORT PART 1: ELECTRONIC CONTAINER SealS EVALUATION
2002Co-Authors: M Jensen, M Williamson, R Sanchez, A Newton, C MitchellAbstract:In mid-1999, in response to the U.S. Department of Transportation's (USDOT) request for participation in the Intelligent Transportation Systems (ITS) Intermodal Freight Field Operational Test (FOT) Program, the Washington State Department of Transportation (WSDOT) entered into a partnership with public and private organizations to test and evaluate ITS solutions for an "Intermodal Data Linkages ITS Operational Test". As the main element of this test, electronic intermodal container Seals (E-Seals) were tested and evaluated in two scenarios: (1) to support U.S. Department of Agriculture (USDA) operations concerning in-bond shipments of containerized produce shipments being moved by truck from the Port of Tacoma across the international border into British Colombia, and (2) to support U.S. Customs (USCS) operations in tracking in-bond auto parts shipments via container ships from Japan to the Port of Tacoma, and then being moved by truck from the Port of Tacoma across the international border into British Colombia. SAIC served as the "Independent Evaluator" for this deployment. This report presents a discussion of the SAIC Evaluation Team findings from the deployment experience. The results of this evaluation, along with corresponding conclusions and recommendations, are detailed in this report. Several key conclusions are summarized as follows: The concept of a disposable, low-cost E-Seal technology was confirmed. Considering the system was the first prototype E-Seal system tested in an operational environment within the United States, the system performed well. The test validated the E-Seal operational concept across two different intermodal freight supply chains. (1) Technology challenges early in the test were successfully overcome. As the FOT began, the original E-Seal design faced challenges with broadcast speed being too slow to read moving trucks. Through cooperative efforts between the system integrator and the E-Seal Vendor, the system was successfully re-engineered to broadcast at a sufficiently increased rate to support roadway speed conditions. (2) The flexibility exhibited by the stakeholders was key to the test's success. USDA and Maersk Sealand modified the initial procedures early in the test to accommodate initial operational problems. Additionally, Westwood Shipping undertook several activities to shield its customers from any disruptions and worked with a new motor carrier (as did USDA and Maersk Sealand) to ensure the test would occur within the time constraints. This report is Part 1 of two reports. A second volume of this report entitled, "Part 2: Freight ITS Traffic Data Evaluations," is being published separately. Part 2 covers two additional projects evaluated as part of the WSDOT Intermodal Data Linkages FOT; however these two projects are not technically related to or integrated with the E-Seal deployment.
M Williamson - One of the best experts on this subject based on the ideXlab platform.
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WSDOT INTERMODAL DATA LINKAGES FREIGHT ITS OPERATIONAL TEST EVALUATION FINAL REPORT PART 1: ELECTRONIC CONTAINER SealS EVALUATION
2002Co-Authors: M Jensen, M Williamson, R Sanchez, A Newton, C MitchellAbstract:In mid-1999, in response to the U.S. Department of Transportation's (USDOT) request for participation in the Intelligent Transportation Systems (ITS) Intermodal Freight Field Operational Test (FOT) Program, the Washington State Department of Transportation (WSDOT) entered into a partnership with public and private organizations to test and evaluate ITS solutions for an "Intermodal Data Linkages ITS Operational Test". As the main element of this test, electronic intermodal container Seals (E-Seals) were tested and evaluated in two scenarios: (1) to support U.S. Department of Agriculture (USDA) operations concerning in-bond shipments of containerized produce shipments being moved by truck from the Port of Tacoma across the international border into British Colombia, and (2) to support U.S. Customs (USCS) operations in tracking in-bond auto parts shipments via container ships from Japan to the Port of Tacoma, and then being moved by truck from the Port of Tacoma across the international border into British Colombia. SAIC served as the "Independent Evaluator" for this deployment. This report presents a discussion of the SAIC Evaluation Team findings from the deployment experience. The results of this evaluation, along with corresponding conclusions and recommendations, are detailed in this report. Several key conclusions are summarized as follows: The concept of a disposable, low-cost E-Seal technology was confirmed. Considering the system was the first prototype E-Seal system tested in an operational environment within the United States, the system performed well. The test validated the E-Seal operational concept across two different intermodal freight supply chains. (1) Technology challenges early in the test were successfully overcome. As the FOT began, the original E-Seal design faced challenges with broadcast speed being too slow to read moving trucks. Through cooperative efforts between the system integrator and the E-Seal Vendor, the system was successfully re-engineered to broadcast at a sufficiently increased rate to support roadway speed conditions. (2) The flexibility exhibited by the stakeholders was key to the test's success. USDA and Maersk Sealand modified the initial procedures early in the test to accommodate initial operational problems. Additionally, Westwood Shipping undertook several activities to shield its customers from any disruptions and worked with a new motor carrier (as did USDA and Maersk Sealand) to ensure the test would occur within the time constraints. This report is Part 1 of two reports. A second volume of this report entitled, "Part 2: Freight ITS Traffic Data Evaluations," is being published separately. Part 2 covers two additional projects evaluated as part of the WSDOT Intermodal Data Linkages FOT; however these two projects are not technically related to or integrated with the E-Seal deployment.
R Sanchez - One of the best experts on this subject based on the ideXlab platform.
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WSDOT INTERMODAL DATA LINKAGES FREIGHT ITS OPERATIONAL TEST EVALUATION FINAL REPORT PART 1: ELECTRONIC CONTAINER SealS EVALUATION
2002Co-Authors: M Jensen, M Williamson, R Sanchez, A Newton, C MitchellAbstract:In mid-1999, in response to the U.S. Department of Transportation's (USDOT) request for participation in the Intelligent Transportation Systems (ITS) Intermodal Freight Field Operational Test (FOT) Program, the Washington State Department of Transportation (WSDOT) entered into a partnership with public and private organizations to test and evaluate ITS solutions for an "Intermodal Data Linkages ITS Operational Test". As the main element of this test, electronic intermodal container Seals (E-Seals) were tested and evaluated in two scenarios: (1) to support U.S. Department of Agriculture (USDA) operations concerning in-bond shipments of containerized produce shipments being moved by truck from the Port of Tacoma across the international border into British Colombia, and (2) to support U.S. Customs (USCS) operations in tracking in-bond auto parts shipments via container ships from Japan to the Port of Tacoma, and then being moved by truck from the Port of Tacoma across the international border into British Colombia. SAIC served as the "Independent Evaluator" for this deployment. This report presents a discussion of the SAIC Evaluation Team findings from the deployment experience. The results of this evaluation, along with corresponding conclusions and recommendations, are detailed in this report. Several key conclusions are summarized as follows: The concept of a disposable, low-cost E-Seal technology was confirmed. Considering the system was the first prototype E-Seal system tested in an operational environment within the United States, the system performed well. The test validated the E-Seal operational concept across two different intermodal freight supply chains. (1) Technology challenges early in the test were successfully overcome. As the FOT began, the original E-Seal design faced challenges with broadcast speed being too slow to read moving trucks. Through cooperative efforts between the system integrator and the E-Seal Vendor, the system was successfully re-engineered to broadcast at a sufficiently increased rate to support roadway speed conditions. (2) The flexibility exhibited by the stakeholders was key to the test's success. USDA and Maersk Sealand modified the initial procedures early in the test to accommodate initial operational problems. Additionally, Westwood Shipping undertook several activities to shield its customers from any disruptions and worked with a new motor carrier (as did USDA and Maersk Sealand) to ensure the test would occur within the time constraints. This report is Part 1 of two reports. A second volume of this report entitled, "Part 2: Freight ITS Traffic Data Evaluations," is being published separately. Part 2 covers two additional projects evaluated as part of the WSDOT Intermodal Data Linkages FOT; however these two projects are not technically related to or integrated with the E-Seal deployment.