ANALISA TEGANGAN PADA PLUG VALVE MENGGUNAKAN METODE ELEMEN HINGGA BERBASIS SIMULASI

Plug Valve adalah katup gerakan rotasi seperempat putaran yang menggunakan plug meruncing atau silinder untuk menghentikan atau mengarahkan laju aliran fluida. Plug Valve bisa dipakai mulai dari tekanan atmosfir hingga 10.000 psi (69.000 KPa) dan suhu dari 50 hingga 1.500 0F. Dalam penelitian ini, dilakukan analisa tegangan yang terjadi pada body plug valve akibat tekanan laju aliran fluida menggunakan Metode Elemen Hingga Ansys Workbench. Pada penelitian ini, body plug valve diberikan variasi tekanan Working Pressure berdasarkan standard ASME B16.34 pada suhu material 300ºC yang kemudian dengan Test Pressure hingga tegangan yang terjadi mencapai batas Yield Tensile Strength material ASTM A216 Grade WCB yaitu sebesar 280 MPa. Hasil tegangan yang didapat berdasarkan hasil simulasi pada body plug valve yang dimodelkan didalam software Ansys Workbench didapatkan bahwa pada Working Pressure 1.02 MPa tegangan maksimum yang terjadi sebesar 3.7625 MPa, selanjutnya pada Test Pressure 16 MPa didapatkan tegangan maksimum sebesar 59.02 MPa, lalu pada Test Pressure 36 MPa didapatkan tegangan maksimum sebesar 132.8 MPa, kemudian pada Test Pressure 56 MPa didapatkan tegangan maksimum sebesar 206.57 MPa, dan pada Test Pressure 76 MPa didapatkan nilai tegangan maksimum sebesar 280.35 MPa. Berdasarkan variasi tekanan yang diberikan pada body valve didapatkan, pada test pressure 76 MPa tegangan maksimum yang terjadi sudah melewati nilai batas Yield Tensile Strength dari material yang dipakai, dalam kondisi ini body plug valve akan mengalami kegagalan distrosi deformasi plastis (plastic deformation), dimana semua perubahan yang terjadi akan terjadi secara permanen dan akan terus berlanjut hingga mencapai batas tegangan maksimum material. Kata kunci: Body, Plug Valve, Tegangan Maksimum, Pressure

Design, Analysis And Experimental Study Of Worm And Worm Gear Pair For Plug Valve Application

The design procedure, load capacity, mathematical model, analysis of worm and worm gear for plug valve has not been investigated, which is a great barrier for the users. This research focuses on addressing these issues by design of gear, developing mathematical model, dynamic analysis of gear and experimental study to find out efficiency of worm gear for plug valve application.

Simple Integration of Sensory Functions

The digitalization of the Industry is one of the megatrends taking place, but many companies struggle to follow this trend. The main reason is the absence of simple solutions for the integration of sensory functions, which are applicable to the existing system. Therefore, this paper discusses the aspects of simplicity in the context of integrating sensory functions into existing systems, to support the development of digitalized products.Two general requirements can be formulated for a solution to be applicable simple: The first requirement is affected by the product structure. The solution must affect the least possible amount of modules and must not interfere with the interfaces of the modular platform. The second requirement is affected by the effort to model the behaviour of the desired information and the possible data a sensory function is delivering. The effort to develop a reliable solution has to be compared with the commercial potential of the solution.To consider the mentioned requirements, the paper explains three approaches to assess the simplicity of solutions on an example of the desired monitoring of the functions of a rotary plug valve.

Development of a cold plug valve with fluoride salt

Experimental studies have been developed on a new freeze plug concept for safety valves in facilities using molten salt. They are designed to allow the closure of an upstream circuit by solidifying the molten salt in a section of the device and to passively melt in case of a loss of electric power, thus releasing the upper fluid. The working principle of these cold plug designs relies on the control of the heat transfer balance inside the device, which determines whether the salt inside the cold plug solidifies or melts. The device is mainly composed of steel masses that are dimensioned to provide sufficient thermal heat storage to melt the salt and thus open the cold plug after the electric power is stopped. The final goal of the work is to provide useful recommendations and guidelines for the design of a cold plug for the emergency draining system of a molten salt reactor. Some numerical thermal simulations were performed with ANSYS mechanical (Finite Element Method) to be compared with results of the experiments and to make extrapolations for a new component to be used in a reactor.