/ Liuliang / 
 I. Overview 
 JHLG series is to measure the flow orifice meter differential pressure generating device, with a variety of differential pressure gauge or differential pressure transmitter can measure the flow of various fluids in the pipeline. Throttling device orifice flowmeter, including ring chamber orifice, nozzle and so on. Throttling device orifice flowmeter and differential pressure transmitter supporting the use of measurable liquid, steam, gas flow, orifice flow meters are widely used in petroleum, chemical, metallurgical, power, light industry and other sectors. 
 The fluid filled pipe, when they flow through the pipeline throttling device, the beam will be at the cutting device cutting pieces of partial contraction, so that the velocity increases, static pressure is low, so in cutting pieces will be produced before pressure drop, the pressure difference, the greater the flow of media flow, resulting in cutting pieces before and after the greater pressure, so by measuring the differential pressure orifice flow meter to measure the size of fluid flow. This measurement method is based on law of conservation of energy and flow continuity law as the benchmark. 
 Intelligent throttling device (orifice meter) is the set of flow, temperature, pressure detection in one, and can be temperature and pressure compensation for a new generation of automatic meter, the orifice flowmeter uses advanced computer technology and micro-power new technologies, powerful, compact, simple, easy to use. 
 Second, characteristics 
 ▲ throttling device orifice flowmeter structure easy to copy, simple, solid, stable performance, reliable, long duration, low prices. 
 ▲ plate calculated using international standards and processing 
 ▲ orifices wide range of applications, all single-phase flow can be measured, some mixed-phase flow can also be applied. 
 ▲ standard throttle device without real-calibration, can be put into use. 
 ▲ a body orifice meter installation easier, no impulse control, can be directly connected to differential pressure transmitters and pressure transmitters. 
 Characteristics of Intelligent orifice flowmeter 
 ▲ intelligent use of monocrystalline silicon pressure sensor 
 ▲ accuracy, improve self-diagnostic function 
 ▲ Smart Smart orifice flowmeter orifice flowmeter to adjust its range of self-programmable. 
 ▲ Smart orifices can display the cumulative flow, instantaneous flow, pressure, temperature. 
 ▲ with online, dynamic full compensation, the smart orifice flowmeter also has a self-diagnosis, self-set range. 
 With a variety of communication interfaces ▲ 
 ▲ stability 
 ▲ wide measuring range, greater than 10:1 
 Intelligent orifice flowmeter specifications 
 ▲ accuracy: ± 0.075% 
 ▲ High stability: better than 0.1% FS / Year 
 ▲ High Static Pressure: 40MPa 
 ▲ 5 years continuous work without adjustment 
 ▲ negligible temperature, static pressure of 
 ▲ higher than the pressure of anti-