The Henan SIA Traffic Instrument Co., Ltd. XF0 series throttling device Profile 

 The XFO series throttling device is a device in a fluid flowing through the pipeline within a pipeline flow, the jet will be formed in the throttle at a local contraction, so that the flow rate increases, the static pressure is reduced, so cutting pieces before and after the static pressure (or throttling flowmeter). 

 Throttling flowmeter of the XFO series throttling device is a typical differential pressure flowmeter. Is currently used to measure the flow of gas, liquid and vapor is the most commonly used as a flow meter in industrial production. According to the survey, the flow meter used in the steel mills, oil refineries and other industrial production systems (70-80)% of the throttling flowmeter. In the whole field of industrial production, the throttling flowmeter accounted for more than half of the total flow meter. Throttle flow meter so to get such a wide range of applications, mainly because it has two very prominent advantages: 

 ① structure is simple, easy to install, reliable, low cost, but also with a certain accuracy. Can meet the needs of the engineering survey. 

 ② have a long history of use, rich, reliable experimental data, design and processing have been standardized. Standard design for processing throttling flowmeter does not require the actual calibration of flow can also be known within the uncertainties 

 The second advantage, the throttling flowmeter on the manufacture and use are very convenient. Because of a flow meter, especially large flow measurement with the flow of juice, will encounter various difficulties in the test. 

 Throttling flowmeter of the XFO series throttling device usually by the fluid flow can be converted into a differential signal throttling device and measuring differential pressure and composition of the flow differential pressure gauge. Throttling device installed in the circulation pipeline, also known as the "device", which includes cutting pieces of the device and before and after the pressure of straight pipe. The display device is also known as "secondary device", which includes the desired instrument in the measurement of differential pressure signal pipe Lee. 

 Done a lot of research work in many countries on the throttling device. Of AGA (American Gas Association) and ASME (American Society of Mechanical Engineers) began from the beginning of this century the experiments of the throttling device, the results were published in 1969 and 1971 reports. DIN (German Industrial Standard), early on the throttle device provided to 1969 have been six amendments to the International Organization for Standardization (ISO), a summary of the results of research on the basis of, respectively, in 1967 and 1968 the published ISO/R541 and ISO/R781 international standards as a throttling device. 1980, two files of the previous amendments, published a suitable orifice plates, nozzles and Venturi tubes international standard ISO 
 5167. China published in 1981, the National Standard GB flow measurement throttling device 
 2624, then the diagonal pressure flange pressure standard orifice plate and angle joint standard nozzle pressure to specific provisions. 

 Using a standard throttling device, the nature and status of the fluid must meet the following conditions: 

 ① fluid must be filled with the piping and throttling device, and continuously flowing through the pipeline. 

 ② the fluid must be Newtonian fluid, the physical and thermodynamic uniform, single-phase or single-phase, including the gas mixture, solution and dispersion of particles less than o. A 
 m of the colloid. Not more than 2% (mass components) in the gas uniformly dispersed solid particles or liquid is not more than 5% (volume composition) dispersed bubbles, can also be considered to be single-phase fluid. But its density shall be taken as the average density. 

 The ③ fluid flows through the cutting pieces intersect. 

 The ④ fluid flow does not change over time or changes very slowly. 

 ⑤ fluid flows through the throttle before the jet is parallel to the pipe axis, no swirl. 

 Standard throttling device is not used for flow measurement of dynamic flow and critical flow. 

 Please contact 

 Sales Manager: Zeng ultra- 

 Sales Hotline: 18637313237 

 15517300086 

 Tel :0373-2,677,766 

 Fax :0373-2,678,899 

 QQ: 
 83,380,304 

 Post Code: 453 700 

 Address: Grace Avenue, Xinxiang City, Henan Province, the western part of high-Bay northbound 

 Name: Henan Airlines Traffic Instrument Co., Ltd. 

 Home: http://www.hnxhyb.com.cn/