The Experts below are selected from a list of 12 Experts worldwide ranked by ideXlab platform
Hui Cao - One of the best experts on this subject based on the ideXlab platform.
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Reform of Mechanical Shaft Sealing Self Flush System of Petrochemical Hot Oil Centrifugal Pump
2016Co-Authors: Ya Liu, Hui CaoAbstract:Abstract. Mechanical seal leakage of centrifugal pumps (especially hot oil pumps) is the main fault reason of the petrochemical equipments. The fuction of the sealing Flush system is to maintain the mechanical shaft seal function correctly. The misconduct of Flush system settings will directly lead to the failure of mechanical seal. In this paper, the problems are analyzed for the present mechanical seal Flushing system. When the centrifugal pump is in a standby state, Flushing system may not provide normal Flush flow in self Flush plan. This may lead to surface fouling of the hot mechanical shaft seal, resulting in seal failure. Our research focus on solving these problems. The way is to change the source of Flush fluid, that is to change the Flush plan to External Flush plan or toChange the fluid pipe position
Angel Custodio - One of the best experts on this subject based on the ideXlab platform.
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Failure analysis of mechanical seals
Know and Understand Centrifugal Pumps, 2003Co-Authors: Larry Bachus, Angel CustodioAbstract:This chapter deals with the causes of premature failure of seals with an insight into the components of seals. O-ring is the rubber component of mechanical seals and this controls the temperature, pressure, and chemical resistance of the mechanical seal. The o-ring failure is because of various reasons such as chemical attack, extrusion, split cracked or hard o-ring, compression set, ozone attack, nicks and cuts, and elastomer sticks to the shaft. In addition to the above causes, this chapter also studies the other causes for premature failure of seals such as the springs clog and jam, the shaft frets under the shaft seal, the o-ring gripping the shaft moves, and incorrect installation dimension. This chapter further discusses the environmental controls for difficult sealing applications. Environment controls inside the seals are contributed by the suction bypass, the External Flush, thermal jacketed seal chamber, slurry seal with evacuation line, quench and drain, the heat exchanger, and the double or dual mechanical seal. The double or dual mechanical seal is good to control the environment inside the seal without diluting the pumped product. It establishes a barrier between the pumped fluid and the environment. This chapter also outlines 14 difficult sealing situations and application of the environmental controls to extend the running time of the seal and the pump.
Ya Liu - One of the best experts on this subject based on the ideXlab platform.
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Reform of Mechanical Shaft Sealing Self Flush System of Petrochemical Hot Oil Centrifugal Pump
2016Co-Authors: Ya Liu, Hui CaoAbstract:Abstract. Mechanical seal leakage of centrifugal pumps (especially hot oil pumps) is the main fault reason of the petrochemical equipments. The fuction of the sealing Flush system is to maintain the mechanical shaft seal function correctly. The misconduct of Flush system settings will directly lead to the failure of mechanical seal. In this paper, the problems are analyzed for the present mechanical seal Flushing system. When the centrifugal pump is in a standby state, Flushing system may not provide normal Flush flow in self Flush plan. This may lead to surface fouling of the hot mechanical shaft seal, resulting in seal failure. Our research focus on solving these problems. The way is to change the source of Flush fluid, that is to change the Flush plan to External Flush plan or toChange the fluid pipe position
Larry Bachus - One of the best experts on this subject based on the ideXlab platform.
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Failure analysis of mechanical seals
Know and Understand Centrifugal Pumps, 2003Co-Authors: Larry Bachus, Angel CustodioAbstract:This chapter deals with the causes of premature failure of seals with an insight into the components of seals. O-ring is the rubber component of mechanical seals and this controls the temperature, pressure, and chemical resistance of the mechanical seal. The o-ring failure is because of various reasons such as chemical attack, extrusion, split cracked or hard o-ring, compression set, ozone attack, nicks and cuts, and elastomer sticks to the shaft. In addition to the above causes, this chapter also studies the other causes for premature failure of seals such as the springs clog and jam, the shaft frets under the shaft seal, the o-ring gripping the shaft moves, and incorrect installation dimension. This chapter further discusses the environmental controls for difficult sealing applications. Environment controls inside the seals are contributed by the suction bypass, the External Flush, thermal jacketed seal chamber, slurry seal with evacuation line, quench and drain, the heat exchanger, and the double or dual mechanical seal. The double or dual mechanical seal is good to control the environment inside the seal without diluting the pumped product. It establishes a barrier between the pumped fluid and the environment. This chapter also outlines 14 difficult sealing situations and application of the environmental controls to extend the running time of the seal and the pump.
Sinopec Luoyang - One of the best experts on this subject based on the ideXlab platform.
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Selection of mechanical seals for high-temperature hydrocarbon pumps in refineries
Petroleum Refinery Engineering, 2011Co-Authors: Sinopec LuoyangAbstract:The design of high-temperature hydrocarbon pumps both in China and abroad are compared,and different selection options are described.The required flowrates of External Flush and auto-Flush are calculated and their respective energy requirements are analyzed.The selections of mechanical seals for high-temperature hydrocarbon pumps and relative concerns are discussed in respect of improvement of safety,reliability and energy consumption.
