What letter should be used to replace the flowmeter code | electric valve, flowmeter, and liquid level

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1. Automatic control identification symbol for flow meters

The automatic control identification symbol for flow meters mainly follows national standards and P&ID graphic specifications, with the core identifier being the letter "F" combined with functional suffixes. 1. National Standard Symbol Specification (GB/T 2625-2010) Flow meters start with the letter "F" in the instrument tag number, and use suffix letters to indicate specific functions: • FI: flow indicator (F represents Flow, I represents Indication) • FR: flow recorder (R represents Recording) • FC: flow controller (C represents Control) What are the models of flow meters for low-pressure and high flow air measurement? Flow meters that can be used for low-pressure and high flow air measurement mainly include the LWQ series Models such as V10FD-L, Songye Bian LUGB, P100-PLG, etc.

1. LWQ Series Compressed Air Flow Meter This spine finger series includes multiple products suitable for low-pressure air measurement. Among them, Guangzhou Dongyi Automation Technology Co., Ltd.s universal integrated temperature, pressure, flow sensors, and intelligent flow integrator have the characteristics of wide flow range ratio (Qmin/Qmax=20:1), 1.0 level measurement accuracy, low pressure loss, and low initial flow rate. It has low sensitivity to fluid disturbance, supports multiple signal outputs, and is suitable for gas and air metering scenarios in urban pipelines and industrial fields; The LWQ-B-40 DN40 caliber produced by Shanxi Kaifeite Instrument Co., Ltd. is a speed flow instrument that can integrate temperature and pressure sensors to achieve automatic compensation and compression factor correction. It has excellent low-pressure and high-pressure meteri

2. The V10FD-L low-pressure field defect type MFC/MFM product from Beijing Sersus Instrument Technology Co., Ltd. is suitable for non corrosive gases below 1MPa. The measurement range covers 5SCCM-250SLM and is divided into three levels: small range (5SCCM-10SLM), medium range (10SLM~30SLM), and large range (30SLM~250SLM). It adopts the principle of differential pressure mass flow measurement without thermal drift and response lag, with a response speed of 100ms and no need for preheating. It supports digital analog compatibility and can communicate with a computer through analog secondary meters, PLC or digital interfaces to complete parameter setting and flow display.

III. LUGB type compressed air flowmeter is a product of Jiangsu Xianda Instrument Co., Ltd., which supports multiple calibers such as DN12

5, DN150, DN200, etc. Different calibers correspond to different flow ranges, and functional codes such as temperature and pressure compensation, output signals, and connection methods can be selected as needed to adapt to low-pressure and high flow air measurement scenarios of different specifications.

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