Possible issues with Roots meters in turbine meters

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1. The technical parameters of the Roots flowmeter comply with the relevant parts of GB 3836.1-2000 "Electrical Equipment for Explosive Gas Environments Part 1 General Requirements" and GB3836.4-2000 "Electrical Equipment for Explosive Gas Environments Part 4 Intrinsic Safety Type" i "Aging" standards. Basic parameters such as measurement range, pressure loss, connection method, etc. nominal diameter mm flow rate range m3/h initial flow rate m3/h maximum pressure loss Pa nominal pressure Mpa Temperature resistance ℃ connection method: 32 0.8-16 0.05 120 1.0-20-80 flange connection 1-20 0.05 120 1.0-20-80 flange connection 40 1.5-30 0.07 130 1.0-20-80 flange connection 1.5-40 0.07 180 1.0-20-80 flange connection 50 1-60 0.07 180 1.0-20-80 flange connection 1.2-85 0.07 210 1.0-20-80 flange connection 80 1.4-100 0.07 220 1.0-20-80 flange connection 1.2-140 0.08 220 1.0-20-80 flange connection 2.9-200 0.15 220 1.0-20-80 flange connection 100 3.1-250 0.11 240 1.0-20-80 flange connection 2.7-300 0.11 280 1.0-20-80 flange connection 4.1-450 0.11 300 1.0-20~80 flange connection 4.5-500 0.11 540 1.0-20~80 flange connection 150 8.1-650 0.65 580 1.0-20~80 flange connection 10-800 0.76 590 1.0-20-80 flange connection 12.5-1000 0.76 600 1.0-20-80 flange connection 13.3-1200 0.76 700 1.0-20-80 flange connection 200 31-1600 1.15 650 1.0-20-80 flange connection 250 75-3000 8.00 450 1.0-20-80 flange connection

2. Which is more precise, ultrasonic, turbine, or Roots flowmeter? Different applications have different requirements. What are the differences in the use of acoustic, turbine, and Roots gas flow meters in natural gas metering? Author: Shanghai Keqi Instrument Co., Ltd. Currently, the widely used flow meters in natural gas flow measurement include gas turbine flow meters, gas ultrasonic flow meters, gas Roots flow meters, etc. These types of flow meters each have their own advantages and disadvantages. Gas ultrasonic flowmeter is a new flow measurement method that has emerged in recent years. Its design is relatively complicated, so its price is also relatively high. At present, there are relatively few manufacturers that can produce it, and its scope of use is only limited to natural gas transmission pipelines. Most of them are openly used by large enterprises. As the scope of use expands, production costs are gradually decreasing, and there is a trend towards replacing gas turbine flow meters. Its measurement accuracy is high and maintenance is minimal. Please visit http://www.keqi-sensor.com. 2. Gas turbine flowmeter is a velocity type flow measurement instrument. When the fluid flows into the flowmeter, it is rectified and accelerated by the leading fluid (or rectifier). Due to the angle between the turbine blades and the fluid flow direction, the turbine generates a rotational torque. After overcoming the friction torque and fluid resistance torque, the turbine begins to rotate. Within a certain flow range, the angular velocity of turbine rotation is proportional to the fluid volume flow rate. According to the principle of electromagnetic induction, a magnetic sensor is used to sense a pulse signal proportional to the fluid volume flow rate from a synchronously rotating reference wheel. The signal is amplified, filtered, and shaped before being sent to an intelligent volume correction instrument for processing along with temperature, pressure, and other signals, and displayed on an LCD screen. High precision and easy measurement. H

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