To measure the flow of liquid,should the orifice flowmeter take pressure port be placed on the upper part?Xi'an Huaheng Instrument Manufacturing Co.,Ltd.

 

　　孔板流量計(jì)的差壓取壓口要根據(jù)管道中流體的性質(zhì)有不同的取壓方法，這和檢測(cè)管道壓力一樣的取壓方法。

 

　　The differential pressure tap of orifice plate flowmeter should have different pressure tapping methods according to the nature of the fluid in the pipeline,which is the same pressure tapping method as that of detecting the pressure in the pipeline.

 

　　當(dāng)管道中的流體是氣體時(shí)，孔板差壓取壓口應(yīng)該在管道中心水平線(xiàn)的上部45°，從管道頂部取壓也可以，這是防止氣體流體中含有的液體進(jìn)入取壓管，即導(dǎo)壓管中影響檢測(cè)的準(zhǔn)確性。

 

　　When the fluid in the pipeline is gas,the orifice plate differential pressure intake should be 45 degrees above the central horizontal line of the pipeline,and the pressure from the top of the pipeline can also be taken.This is to prevent the liquid contained in the gas flow from entering the intake pipe,that is,the pressure guide pipe affects the accuracy of the detection.

 

　　當(dāng)管道中流體為液體時(shí)，孔板差壓取壓口應(yīng)該在管道中心水平線(xiàn)的下方45°的位置，這是為了防止管道流體中含有的氣體進(jìn)入導(dǎo)壓管，影響檢測(cè)的準(zhǔn)確性。

 

　　When the fluid in the pipeline is liquid,the orifice plate differential pressure intake should be located at 45 degrees below the central horizontal line of the pipeline.This is to prevent the gas contained in the pipeline fluid from entering the pressure guide pipe and affect the accuracy of the detection.

 

　　孔板流量計(jì)按國(guó)標(biāo)規(guī)定進(jìn)行設(shè)計(jì)、制造和檢定的標(biāo)準(zhǔn)孔板無(wú)需實(shí)流標(biāo)定，精度高、結(jié)構(gòu)簡(jiǎn)單、制造成本低，但壓力損失在所有標(biāo)準(zhǔn)節(jié)流裝置中最大，不適用于要求壓力損失小的情況，標(biāo)準(zhǔn)孔板廣泛用于石油、化工、冶金、電力等行業(yè)。

 

　　The orifice plate flowmeter designed,manufactured and calibrated according to the national standard does not need real-flow calibration.It has high accuracy,simple structure and low manufacturing cost.However,the pressure loss is the largest in all standard throttling devices,and it is not suitable for situations requiring low pressure loss.The standard orifice plate is widely used in petroleum,chemical,metallurgical,power and other industries.