LGK series orifice flowmeter is a differential pressure generating device for measuring flow. With various differential pressure gauges or differential pressure transmitters, it can measure the flow of various fluids in the pipeline. The throttling device of orifice flowmeter includes annular chamber, orifice plate, nozzle, etc. Orifice flowmeter throttling device is used together with differential pressure transmitter to measure the flow of liquid, steam and gas. It is widely used in petroleum, chemical industry, metallurgy, electric power, light industry and other departments< br />
Main technical parameters < br / >
1. Nominal diameter: DN 15 -- DN 1000 (mm) < br / >
2. Nominal pressure: up to 10MPa < br / >
3. Working temperature: - 50 -- 550 < br / >
4. Range ratio: 1:3,1:4 < br / >
5. Pressure measurement methods: flange pressure measurement, angle connection pressure measurement, diameter distance pressure measurement < br / >


Installation precautions < br / >
1. Before the installation of orifice plate, check whether the number and size of throttling device meet the requirements of pipeline installation position& nbsp;< br />
2. When installing new pipeline system, the orifice plate must be installed after pipeline flushing and cleaning& nbsp;< br />
3. Pay attention to the installation direction of orifice plate+& rdquo; The number one should be toward the beam& nbsp;< br />
4. The center of orifice plate should coincide with the center line of pipeline, and the concentricity error should not exceed 0.015 (1 / & beta- 1) The value of& nbsp;< br />
5. When the orifice plate is installed in the pipeline, its end face shall be vertical to the pipeline axis, and the Perpendicularity Error shall not exceed & plusmn; 1°。< br />
6. The sealing gasket used for clamping orifice plate (including ring chamber and flange, ring chamber and orifice plate) shall not protrude into the inner wall of pipeline after clamping& nbsp;< br />
7. The orifice plate must be installed tightly without leakage. Therefore, the installation work must be carried out before the pipeline pressure test& nbsp;< br />
8. The pressure pipe shall be laid vertically or obliquely, and its inclination shall not be less than 1:12. The inclination of the fluid with higher viscosity should be increased< br />
9. In order to avoid the distortion of differential pressure signal transmission, the positive and negative pressure pipes should be laid as close as possible, and anti freezing measures should be taken in severe cold areas< br />
10. When the orifice plate is installed on the vertical main pipe, the position of pressure tap can be arbitrarily selected on the plane of pressure tap & nbsp< br />
11. The pressure pipe shall be made of pressure resistant and corrosion-resistant materials according to the nature of the medium to be tested. Its inner diameter shall not be less than 6 mm and its length shall preferably be within 16 M< br />