Metal tube float flowmeter applicable conditions and measured media

Project Overview

For the applicable working conditions, measured media and installation methods of metal tube float flow, metal tube float flowmeter manufacturers to help you give the following suggestions. Metal tube float flowmeter of metal tube conical tube float flowmeter calibre 15~100mm, through the magnetic steel coupling and other means, the displacement of the float is transmitted to the conversion part outside the casing. Compared with the transparent conical tube float flowmeter. It can be used for higher medium temperature and pressure and is not easily broken.

Transparent float flowmeter there are several other structures, such as transparent straight tube float flowmeter is transparent conical tube float flowmeter deformation structure, flow detection element by the orifice plate and conical float plug composition. Metal tube conical tube float flowmeter there are other types or deformation structure. One of the direct approval type through the transparent straight tube and float plug directly observe and read the float position; horizontal installation type can be installed in the horizontal pipeline; straight through the typical structure of the right-angle flow direction is different, do not have to change the direction of flow, can be directly connected to the vertical pipeline, easy to install; float orifice plate type to the float orifice instead of the rotor conical tube, change the flow rate specifications as long as the replacement of the different taper of the float plug, it is more convenient.

• 1、According to the flowmeter function classification can be divided into field indication, pneumatic remote signal output, electric remote signal output, alarm and so on. Transparent tube float flowmeter are field indication type. Sometimes equipped with a proximity switch, the output of the upper and lower limits of the alarm signal. The conversion part of the remote signal output type instrument will convert the float displacement into current or pneumatic analogue signal output, respectively become gas remote float flowmeter and electric remote float flowmeter.
• 2、according to the pipeline connection can be divided into hose connection, flange connection, threaded connection. Transparent tube float flowmeter three connection methods are available, including hose connection is commonly used in the calibre of 10mm below the instrument and the place of low working pressure; threaded connection is commonly used in the calibre of 40mm below the instrument, the scope of use is not wide; flange connection for the calibre of 15 ~ 100mm of the instrument, the application of the most common. Metal tube float flowmeter is usually flange connection, individual models with threaded connection.
• 3、According to the measured fluid classification can be divided into liquid, gas, steam. Most of the float flowmeter the same instrument can measure both liquid and gas. Measurement of steam can only use specially designed metal tube float flowmeter, or in the standard instrument, the addition of additional components, such as the addition of liquid damping with heat sinks, and the indication of the conversion part of the connection with the addition of heat sinks and so on.
• 4、According to the use of classification can be divided into base type, jacket insulation type, explosion-proof type, corrosion-resistant type, blowing flow type. The base type is the most widely used. Jacket insulation type for pipeline temperature is significantly higher (or lower) than the ambient temperature of the occasion. Used for explosive gases or dust when the electric telemetry float flowmeter using explosion-proof type, the current domestic explosion-proof design structure and intrinsically safe explosion-proof design structure type. Corrosion-resistant float flowmeter in contact with the medium of the structural components and floats made of PTFE and other engineering plastics. Blowing flow type flow rate is small, air for 20 ~ 3000L / h, water for 0.3 ~ 100L / h, accuracy requirements are not high. Blow flow type float flowmeter and small self-contained differential pressure regulator composed of one, so that the power source pressure fluctuations or downstream parameter changes caused by perturbations in the flow rate changes, self-adjustment to maintain a constant flow rate.
• 5、According to the measured fluid through the way classification can be divided into full-flow type, split-flow type. Full-flow type refers to the measured fluid flow through all the float flow meter instrument. Shunt type refers to only part of the measured fluid flow through the float and other flow detection part, shunt type float flowmeter installed in the main pipeline on the standard orifice plate and a smaller diameter float flowmeter combination, applied to the pipe diameter greater than 50mm of the larger flow and as long as the local indication of the place.

Attention to the installation of metal tube float flowmeter:

• （1）Mounted vertically on a vibration-free pipe, the fluid flows through the meter from the bottom up.
• （2）A filter should be installed upstream of the instrument when measuring dirty fluids.
• （3）If the fluid itself has pulsation, a buffer tank can be added; if the instrument itself has oscillation, a damping device can be added.
• （4）To exhaust the gas in the meter for liquids.
• （5）If the fluid density and gas pressure and temperature of the use conditions are not consistent with the calibration, make the necessary conversions.