Selection of chlorine flow meter

The STF series of electronic target flowmeters (electronic targets) are a new type of flow measurement instrument developed by utilizing the latest capacitive force sensors, as well as advanced digital-to-analog conversion technology and microelectronics. The use of chip-level capacitive force sensors and an efficient anti-overload structural design are the key factors that enable this new product to achieve high precision and stability. It not only boasts high sensitivity but also offers measurement accuracy comparable to that of positive-displacement flowmeters. Additionally, thanks to its unique resistance to interference and impurities, it can replace conventional flowmeters for measuring flow rates; it is particularly well-suited for challenging conditions such as high viscosity, dirty media, substances prone to solidification or clogging, as well as extreme temperatures and highly corrosive environments. 【Product Parameters】 Product Name: STF Chlorine Flow Meter Diameter: DN15～DN3000mm and larger Nominal Pressure: 0.6～42MPa Operating Temperature: -200～+500℃; higher temperatures available upon agreement with the manufacturer Accuracy: ±0.2～±1.5%FS Range Ratio: 1:10 Body Material: Carbon steel ； Stainless steel (or as required by the user) (fluorine-lined). Power supply: built-in 3.6VDC lithium battery (to be replaced every two years) ； External 24VDC supply (optional); output signal: 4–20mA two-wire system ； Pulse 0～1000HZ ； RS232/RS485 (or available upon customer request); Protection rating: IP65; Explosion protection rating: Intrinsically safe E*allCT4 ； Explosion-proof ExdllCT4 compliance standard: Enterprise standard Q/BET05-06; Display on the meter head: Cumulative flow ； instantaneous flow rate ； Operating temperature ； Operating pressure (only available in temperature and pressure compensated versions) ； Bar-shaped full-scale percentage ； Fault self-check Connection type: tapered pipe thread (DN15-80mm) ； Clamped type (DN15-300mm) ； Double flange type (DN15-500mm) ； Other connection methods can be agreed upon with the manufacturer. The factory recommends the use of plug-in target flowmeters that are easy to install and cost-effective, available in sizes from DN40 to DN3000mm and larger. 【Product features】 · The entire instrument has no moving parts; its plug-in design makes it easy to disassemble. · A variety of materials resistant to corrosion and extreme temperatures can be used (such as Hastelloy, titanium, etc.). · The entire unit can be designed to be completely sealed with no dead corners (using welding), ensuring no leakage points and allowing it to withstand pressures up to 42 MPa. · The instrument comes equipped with a self-checking function, making it easy to identify any faults. · The sensor does not come into contact with the fluid being measured, thus eliminating the risk of component wear and ensuring safe and reliable operation. · Dry calibration can be carried out on-site, using a weight-based method. Calibration can be carried out through simple key operations. There are various installation options available; the online insertion type, for example, results in lower installation costs. It features integrated temperature and pressure compensation, allowing for direct output of mass or standard cubic volume. Optional functions include small-signal rejection, nonlinear correction, and adjustable filtering time. It is capable of accurately measuring the flow rate of gases and liquids under various conditions – normal temperatures, high temperatures up to 500 degrees, and low temperatures down to -200 degrees. The measurement accuracy reaches 0.2%, with good repeatability of around 0.05–0.08%. Measurement is fast, and the pressure loss is low, at only about 1/2 of that of standard orifice plates. It has strong resistance to interference and impurities. The flow range can be adjusted by replacing the flow restrictor element as needed. It features a low-power battery for on-site display, enabling direct reading of values online; the display screen can show both instantaneous and cumulative flow rates, along with percentage bar graphs. Installation is simple and easy, and maintenance is straightforward. There are multiple output options, allowing for the remote transmission of various parameters. It also has strong resistance to vibrations, enabling measurement of pulsating flows within a certain range

I have been in contact with the following types: orifice plates, flange-mounted pressure taps, and dual-flange differential pressure transmitters for measurement; however, pressure tap elbows tend to get clogged and are difficult to deal with. Vortex flow meters (with a sound-generating element and a separate probe) are acceptable, but not very stable, as they are prone to interference. Target flow meters have been tested, and their measurement performance is decent; the key lies in the connection between the target rod and the sensing components, as well as the sealing method

Orifice plate, flange-based pressure tapping, measurement using a double-flange differential pressure transmitter. If it is a double-flange differential pressure transmitter that is used for measurement and there are no pressure tap pipes installed, then why could the pressure tap pipes still get clogged? It’s not the installation of a pressure guide tube

Corrosion-resistant porous orifice flow meter

This post was last edited by hyzhen924 on 2020-1-12 at 22:01; it refers to that connection pipe used for pressure measurement, which is about 400 mm long

A flange-mounted pressure tap orifice plate refers to a type of orifice plate whose pressure tapping ports are located on the flange; it does not mean that the differential pressure transmitter is connected via a flange – it is still the pressure tapping tubes that are used for taking pressure readings