Features integrated gas orifice flowmeter orifice flowmeter medium flow through the pipeline There are several ways, but the most widely used, the most common is the differential pressure flowmeter. It gauge and differential pressure by throttling device or by a throttling device, together with a differential pressure transmitter together constitute the second table. A long history of use throttling device, have been standardized in the international and domestic. Throttling device is a component when the differential pressure measurement, people use it to generate the fluid pressure in the pipe. The use of lead pipes to transfer pressure generated by the front and rear differential throttling device to the differential pressure transmitter, and then entered into the secondary instrument, will show the instantaneous flow or accumulation of fluid in the pipe flow. Use adjustable flow meter can also be adjusted. Throttling device structure is simple, accurate measurement, reliable, maintenance, maintenance is very convenient. Gas orifice flowmeter uses LG / FB Standard ring chamber orifice, flange plate throttling device is no scale of flow measurement devices, which with pneumatic, electric or dual bellows differential pressure transmitter differential pressure transmitter supporting the use. Pressure in the metallurgical, chemical, petroleum, power industrial systems continuously measure the medium temperature ≤400 ℃ of liquid, gas and steam flow through the orifice plate produced by the differential pressure transmitter signal into an output signal proportional, then There are secondary instrument or regulator, to be measured flow records, direction or regulation. Throttling the flow meter works throttling device is caused by man-made medium flow restrictor in the pipeline. When the measured medium flow stream holidays means, resulting in a local contraction, stream concentration, the flow rate increases, the static pressure is reduced, so in the orifice upstream and downstream sides of generating a static pressure differential. This was the difference between the static pressure and the flow rate of a certain function, the greater the flow, generated by static pressure difference larger, so by measuring the differential pressure method, can be measured is the flow rate. Gas orifice flowmeter structure features a donut take pressure standard orifice plate: the case of standard orifice plate. Due to achieve a donut to take pressure, improve the measurement accuracy, shorten the minimum required length of straight pipe installation can be widely used in various sectors. 2, fillet drilling alone take pressure standard orifice plate: the case of standard orifice plate. When the diameter of 400 mm or more, the use of this form. Pressure way to take pressure flange drilling alone, to take pressure equalizing ring round or square to take pressure equalizing ring. Shank-well format for holes or nonstandard round orifice and so on. 3, flange pressure standard orifice: the case of standard orifice plate. Whether it is the pipe diameter, and its upstream and downstream pressure tap centers are located on both sides of all kinds from the end face of each orifice 1:00 (25.5mm) at refining system widely used this form. 4, to take pressure away from the standard orifice diameter: the case of standard orifice plate. Pressure way to take pressure pipeline. Upstream pressure hole center is located at the front of the plate to double pipe diameter. End face of the inner diameter of the tube and a half where the center is located downstream of the hole to take pressure away from the orifice plate after. 5, small orifice: the case of non-standard plates. For measuring the measurement within 10 to 50 mm diameter fluid. 6, double plate: two standard orifice by a certain distance from each other in a straight pipe installed components. Depending on the direction of the stream, the front anti-called secondary orifice hole behind the plate called a master plate. Auxiliary plate section than m1 is greater than the primary orifice section than m. Two plates with a liquid wall constitutes a similar nozzle. It is used to measure the low Reynolds number flow or high viscosity fluids. 7, round orifice: the case of non-standard orifice plate, suitable for dirty, or analysis of the bubbles, or measuring fluid flow containing solid particles, the lower the measurement accuracy. 8, conical entrance orifice: the case of non-standard plates. Circular cone angle with the center line was 45 °, this conical entrance orifice can be applied to a very low Reynolds number of occasions, but not less than 25 mm pipe size. 9, other. Gas orifice flowmeter features 1) Standard hole version - has high accuracy, easy installation, using a wide range of low cost characteristics. Widely used in flow measurement with a variety of media. 2) the standard nozzle - with a high temperature high pressure, impact resistance, long life, large measuring range and high measurement accuracy. Suitable for high temperature and high pressure steam power plant flow, thermal network path, large fluid flow velocity measurement. Has two forms: A: ISA1932 nozzle (standard nozzle) B: Long Neck nozzles. 3) classical Venturi tube Venturi nozzle - with a pressure loss, high accuracy, short length of straight pipe before, long life characteristics. 4) wing wind measuring device - a small pressure loss, a shorter front straight, measure stability characteristics. 5) Double Venturi tube - with a pressure loss is small, measuring stability, suitable for round or rectangular duct air flow measurement. Specifications: DN80-4000mm (or length × width). 6) Circular plates, round orifice, eccentric orifice - have clogging, short front and rear straight pipe characteristics. Suitable for blast furnace gas, coke oven containing powdered coal, etc., measuring impurities pay much gas and liquid. 7) dual circular nozzle orifice 1/4 - use a variety of low Reynolds number flow state, widely applied in a variety of low flow measurement of liquid flow rate, gas. 8) Annubar - with a pressure loss is small, easy installation features. Applicable circular, rectangular pipe flow measurement. 9) limiting orifice - have limiting buck characteristics. Applies to limit the flow or blood pressure. 10) single and double rooms to balance container - for level, drum level.