The gas pressure port is preferably in the upper part of the pipe; the liquid pressure port is below the side but not directly below, and the deposition particles will block the pressure port; if the steam is taken, the pressure port is installed at the side of the pipe. Principle analysis Rite Hite Style Industrial High Speed Roller Door
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First, the installation notes of the orifice flowmeter 1. The gas pressure port is preferably in the upper part of the pipeline; the liquid pressure port is below the side but not directly below, the sediment particles will block the pressure port; if the steam is taken, the pressure port On the side of the pipe; 2. Do not make mistakes in the direction of the orifice plate. The mark "+" is positive, "-" is negative, and "+" is the direction in which the fluid comes. 3. The pressure guiding pipe drawn from the positive and negative pressure port should be kept parallel under any circumstances. 4. The orifice plate should generally be used with the differential pressure transmitter. When connecting the pressure guiding tube and the differential pressure transmitter, pay attention to it. Negative pressure should not be reversed, "H" is positive, "L" is negative; 5. If the gas is measured, the differential pressure device is recommended to be placed above the pipeline, and if the liquid is placed at the lower part of the pipeline, if the steam is equipped with a condensation tank, it should be Keep the condensate tanks at the same level. 6. Straight pipe section requirements, according to the calculation book to calculate the length of the front and rear straight pipe sections required to install the orifice plate, usually 10D after the first 20D to install (D refers to the diameter of the orifice plate) throttle device V cone flowmeter and orifice plate Flowmeter performance comparison: V cone flowmeter (also known as inner cone, V cone, V-cone flowmeter) is a new generation of differential pressure flowmeter measuring instrument, with special throttle device conical tube and universal differential pressure The transmitter and the secondary instrument are combined. The conical tube is a patented product that has been greatly improved in the old differential pressure device. It consists of a circular measuring tube and a special core that is placed in the measuring tube and coaxial with the measuring tube. The core body and the cylindrical surface of the measuring tube form a different-diameter annular overflow crack, and the flow of the fluid is throttled, and the throttling process is similar to that of the annular orifice plate and the classic venturi. The special structure of the conical tube effectively eliminates the performance problems of the orifice plate and the nozzle, so that the sharp edge abrasion and the leakage of the throttling member such as the orifice plate are not permanently used in the application process, and the knot can be The flow velocity gradient in the pre-flow tube and the pre-existing non-axisymmetric velocity propagation for additional effective flow rectification (rectification) enable highly accurate and highly turbulent flow measurements. The conical tube flowmeter can be used to measure various liquids, gases and vapors. It is a dream replacement product for dilapidated gauges such as size orifices. It provides an effective, improved industrial and energy measurement result. Reliable measurement of the wrist.
Second, the product performance mechanism Brief analysis of the orifice flowmeter can have such excellent skills and performance? The most primitive reason is due to its simple and scientific and reasonable structure and the resulting throttling mode. It should be said that the tapered tube is the skill of the annular orifice plate and the classic venturi tube. It combines the performance characteristics of the annular orifice plate, the classic venturi tube, the wear-resistant orifice plate and the tapered inlet orifice plate. Eliminating the measurement performance of the orifice plate, resulting in a new type of throttling flow measurement instrument with "selective genetic hybridization" characteristics. The primary measurement performance of the size orifice plate: 1 In the course of application, the frictional edge ablation and fouling of the outflow throttling element are additionally reduced, resulting in a slow change of the outflow coefficient, resulting in a flow measurement difference pool that is difficult to restrain. 2 In the middle and low Reynolds number measurement area, the outflow coefficient changes with the change of flow conditions, resulting in a large scale of measurement. 3 The installation of straight pipe sections is too high, and the seriousness of the installation of the orifice plate is difficult to meet the standard. It often causes the use of additional installations, which is often difficult to quantitatively evaluate. 4 pressure loss is large.
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