|信息来源： 华恒 | [ 2019-05-07] 点击量： 302|
Installation method and precautions of orifice plate flowmeter pressure intake port,Xi'an Huaheng Instrument Manufacture:orifice plate flowmeter designed,manufactured and calibrated according to the national standard does not need real flow calibration,has high accuracy,simple structure and low manufacturing cost,but the pressure loss is the largest in all standard throttling devices,and is not suitable for situations requiring low pressure loss.Standard orifice plate is widely used.Petroleum,chemical,metallurgical,electric power and other industries.
Installation method of orifice flowmeter pressure tap:
1.When the measured fluid is liquid,in order to prevent air bubbles from entering the pressure guide pipe,the pressure take-off port should be located at the position below 45 degrees below the center line of the process pipeline,and the positive and negative pressure take-off port should be in the symmetrical position with the pipeline,both of them should be on the same horizontal plane.
2.When the measured fluid is gas,in order to prevent the liquid(condensate)from entering the pressure guide pipe,the pressure take-off port should be located at the position of less than 45 degrees above the central pipeline of the process pipeline,and the positive and negative pressure take-off ports should be in the same horizontal line when they are in the symmetrical position with the pipeline.
3.When the measured fluid is steam,the condensate level in the condenser should be kept constant and the height of the condensation surface on the positive and negative pressure guide tubes should be consistent.When the positive and negative pressure ports are in the symmetrical position with the pipeline,they should be on the same horizontal plane.
The above three kinds of orifice flow meters can be installed symmetrically with the pipeline and on the same side of the pipeline.