Abstract：Aiming at the problem that the switch valve in the pVTt gas flow standard device affects the measurement result of the nozzle outflow coefficient, the relationship between the flow area and the opening of the high vacuum butterfly valve and the high vacuum ball valve in the pVTt gas flow standard device is analyzed, and the formulas of the mass flow rate of the two valves with time are respectively derived; the best timing positions of the two valves are calculated ; design experiments have verified that the best timing points of the butterfly valve and ball valve used are located at the valve opening position of 4.5° and 2.5°, respectively.
李宁,向德华,周艳,朱宁,陈炜骄,徐旷宇. pVTt法气体流量标准装置开关阀时间系统差补偿方法[J]. 计量学报, 2021, 42(8): 1012-1017.
LI Ning,XIANG De-hua,ZHOU Yan,ZHU Ning,CHEN Wei-jiao,XU Kuang-yu. Compensation Method of Time System Difference of On-off Valve of pVTt Gas Flow Standard Device. Acta Metrologica Sinica, 2021, 42(8): 1012-1017.
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2021, Vol. 42 
