Characteristic Analysis and Experiment of a Flow Distribution Valve

The comprehensive characteristics of flow distribution valve in water system are analyzed. The flow balance valve can change the drag efficient according to the condition of system, and can measure the flowrate. The structure of the flow distribution valve is introduced, and the theoretical calculation formula for the regulating valve are derived. A rated flowrate from 10.65m3/h to 20.48m3/h are offered in the numerical work. Fluent CFX analyses show good behaviours: through the benefits of V-ball valve good linearity and regulation characteristics, when the valve throttling, the system flow can maintain a relatively stable state, it can be conducived to improve the measurement accuracy of the distribution valve. The experimental results show that the measure accuracy is less than 5.8%.

Computational design optimization of industrial single piece ball valve to enhance the flow performance

The characteristics of flow through the fluid flow system largely depends on the control valves and their performance. Ball valves are one among the major valves widely used in various industries due to their simple construction and ease of manufacturing. Thus investigating flow characteristics of these valves is most essential to minimize the losses due to friction and cavitation caused within the valve body. The main objective of the current work is to carry out the computational fluid dynamics analysis using Ansys® Fluent® as solver and Solidworks® as 3D modelling tools to investigate the flow patterns through the single piece ball valve to determine the various flow characteristic and there by suggest design optimization for improved flow rate and performance. Various designs of ball valve such as BVD1, BVD2 and BVD3 were tested through CFD simulation. The simulation results reveals that BVD1 and BVD2 are failed in bidirectional flow characteristics. However BVD3 shows the significant improvement in all the flow characteristics.

Sterilizer Reliability Analysis Using Reliability Block Diagram Based on Failure Identification Through Fault Tree Analysis

A sterilizer is a pressurized steam vessel used to boil palm oil. The condition of the sterilizer at PT .X often emits steam at the door and body of the stew. Throughout 2020, there were 12 critical components that were frequently damaged, such as ball valve, actuator, exhaust valve, packing door, elbow, condensate nozzle, liner, pipe, condensate valve, strainer valve, pipe flange, and packing flange. Fault Tree Analysis is an analysis tool that graphically translates the combinations of errors that cause system failures. Reliability Block Diagram is a diagramming method for showing how reliability components contribute to the success or failure of a complex system. Based on the results of the failure calculation using fault tree analysis, the probability of failure of the horizontal sterilizer component is the ball valve 12.2%, exhaust valve 10.9% actuator 6%, door packing 0.24%, elbow 0.24%, condensate nozzle 4.8%, liner 8.61%, 0.25% pipe, 0.21% condensate valve, 4.4% filter valve, 0.22% pipe flange and 0.27% packing flange. The reliability value of the horizontal sterilizer from the calculation using the reliability block diagram is 85.69% if it operates for 8 hours, 62.93% if it operates for 27 hours, 39.6% if it operates for 54 hours, 13.34% if it operates for 117 hours. o'clock. o'clock. o'clock. hours and 1.81% when operating for 234 hours. To maintain reliability above 60%, the preventive maintenance schedule is: Every 80 hours of operation a door packing inspection is carried out. Every 234 hours of operation, elbow tubing and flanges are checked. Every 300 hours of operation, a pipe inspection is carried out. Every 450 operational hours an inspection is carried out on the ball valve, condensate nozzle, liner, actuator, and exhaust valve. Every 30 hours of operation, valve condensate, filter valves and packing flanges are checked.

SIMULASI PENGARUH BUKAAN VALVE TERHADAP PRESSURE DROP DAN KAVITASI PADA CONTROL VALVE TIPE BALL VALVE DENGAN MENGGUNAKAN SOFTWARE AUTODESK CFD (COMPUTATIONAL DYNAMICS FLUID)

Control valve merupakan suatu instrumen yang digunakan dalam proses industri dan memiliki peran yang sangat penting. Sebagai final control element¸control valve digunakan untuk mengatur aliran fluida agar mampu mengimbangi adanya gangguan serta tetap menjaga variable proses tetap berada pada set point yang diinginkan. Simulasi pengaruh bukaan valve terhadap pressure drop dan kavitasi pada control valve menggunakan autodeks CFD (2019). Kavitasi adalah suatu keadaan yang disebabkan oleh berubahnya fase cairan yang sedang dialirkan dari fase cair menjadi fase uap sehingga menimbulkan gelembung-gelembung. Timbulnya gelembung tersebut disebabkan oleh menurunnya tekanan hingga berada di bawah tekanan uap jenuh cairan tersebut. Adapun variable tetap yang digunakan adalah tekanan 4 atm, 5 atm, 6 atm dan bukaan valve 50 %, 70 %, 90 % dan variable terikat Penurunan tekanan (∆P), Bilangan reynold (NRe), Kavitasi (CN). Di dalam penggambaran geometri valve menggunakan autodeks fusion 360. Untuk bukaan valve yang kecil yaitu 50% penurunan tekanannya sebesar 1.84 atm dengan tekanan awal 5 atm. Bilangan Reynold tertinggi pada bukaan valve 90% dengan bilangan reynold 78,352 dan aliran yang terbentuk adalah turbulen. Indeks kavitasi terendah adalah sebesar 9.47 dan yang tertinggi 36.7. Pada percobaan ini dapat dilihat antara variable terikat, penurunan tekanan dan kavitasi serta variabel bebas bukaan valve dan tekanan yang paling berpengaruh.