What is Chemical Flow Meter?
Chemical Flow Meter is also known as chemical resistant flow meter. It is a flow meter used to measure common chemical fluid media. In chemical production control and metering, between chemical reaction storage tanks, or chemical raw material feed pipelines.
Sino-Inst offers a wide range of liquid and gas flow meters to help you regulate the flow of water, petroleum products, fuels, chemicals and more.
So how do choose the most suitable Chemical Flow Meter? Hope you can find the answer after reading this article.
Featured mechanical & digital flow meter for chemicals
Gear Flow Meter – A New Choice for Chemical Liquids
Gear Flow Meters produced by Sino-Inst has high machining accuracy and precise installation. The rotation of the gear is scanned by non-contact. Each tooth produces a pulse. The resolution is very high. The cylindrical gear transmitter can measure very small flow. Quantitative small volume of liquid.
The new Gear Flow Meter made of PTFE is widely used in the chemical industry and laboratories. 98% nitric acid and sulfuric acid resistant to hydrofluoric acid. It has not been corroded after long-term continuous use.
Gear Flow Meter is suitable for:
- Resin and glue measurement
- Hydraulic oil, lubricating oil, grease measurement
- Fuel oil measurement
- Ink, asphalt measurement
- Liquid nitrogen, freezing liquid, solvent measurement
- Edible oil, fish oil and food filling measurement
- Chemical and anti-corrosion requirements fluid measurement
- Fluid quantitative control system
Extended reading: High-quality hydraulic fluid flow meters
Chemical flow meters types
The following will explain the flowmeters commonly used in the chemical industry.
- Electromagnetic flowmeter. When a conductive fluid flows through an electromagnetic field, the velocity of the fluid can be obtained by measuring the voltage. The electromagnetic flowmeter has no moving parts and is not affected by the fluid. The accuracy of measuring conductive liquids when the tube is full is very high. The electromagnetic flowmeter can be used to measure the flow rate of the slurry fluid.
- DP flowmeter can be used to measure the flow rate of most liquids, gases and steam. Positive displacement flow meter (PD). The PD flowmeter is used to measure the volumetric flow rate of liquid or gas. It introduces the fluid into the measuring space and counts the number of rotations. Impellers, gears, pistons or orifices are used to divert fluids.
- Vortex flowmeter. The vortex flowmeter is to place a non-streamlined vortex generator in the fluid, and the speed of the vortex is proportional to the speed of the fluid to calculate the volume flow. The vortex flowmeter is suitable for measuring liquid, gas or steam. It has no moving parts and no fouling problem. The vortex flowmeter generates noise and requires the fluid to have a higher flow rate to generate the vortex.
- Thermal mass flow meter. The fluid velocity is measured by measuring the increase in the temperature of the fluid or the decrease in the thermal sensor.
- Coriolis flowmeter. This kind of flowmeter uses a vibrating fluid tube to produce a deflection corresponding to the mass flow rate for measurement.
- Turbine flowmeter. When the fluid flows through the turbine flowmeter, the fluid causes the rotor to rotate. The rotation speed of the rotor is related to the speed of the fluid. From the average flow rate of the fluid felt by the rotor, the flow rate or total amount is derived.
- Ultrasonic flowmeter. The propagation time method and the Doppler effect method are methods often used in ultrasonic flowmeters to measure the average velocity of the fluid. Like other speed meters, it is a meter that measures volume flow.
Electromagnetic flowmeters can measure the flow of general conductive liquids. It can also measure the volume flow of liquid-solid two-phase flow, liquid with high viscosity, strong acid, strong alkali, and salt liquid medium.
For chemical liquids, as long as they are conductive liquids, electromagnetic flowmeters can measure them.
But we need to choose the appropriate lining and electrode according to the characteristics of the chemical liquid.
You can refer to the liner and electrode material usage table below.
Lining material selection：
|
Lining material |
Linner |
Main performance |
Application |
Diameter |
|
Rubber |
Neoprene(CR) |
1. It has excellent flexibility. High tearing force. Good wear resistance. |
1. <60℃ |
DN65~DN1600 |
|
Polyurethane Rubber(PU) |
1. It has excellent wear resistance (equivalent to ten times that of natural rubber) |
1. <80℃ |
DN25~DN500 |
|
|
Silicone rubber |
1. It has excellent flexibility. High tearing force. Good wear resistance. |
1. <180℃ |
DN40~DN1600 |
|
|
Fluoroplastics |
PTFE(F4) |
1. It is a material with the most stable chemical properties in plastics. Can withstand boiling hydrochloric acid, sulfuric acid, nitric acid and aqua regia. It is also resistant to concentrated alkali and various organic solvents. Not resistant to the corrosion of chlorine trifluoride, high temperature oxygen trifluoride, high flow rate liquid fluorine, liquid oxygen, and ozone. |
1. <120℃ |
DN10~DN1600 |
|
Teflon F46(FEP) |
1. The chemical properties are equivalent to PTFE |
1. <180℃ |
DN10~DN200 |
|
|
PFA |
1. The chemical performance is equivalent to F46 |
1. <180℃ |
DN10~DN300 |
Electrode material selection:
| Material | Medium |
| 316L | Domestic water, industrial water, raw water, urban sewage, etc. |
| Hastelloy B (HB) | Sodium hydroxide ammonium hydroxide alkali solution and weak organic acid |
| Hastelloy C (HC) | Oxidizing salt solution (Fe+++, Cu++, seawater) |
| Titanium (Ti) | 1. Salt solution (chloride, sodium salt, potassium salt, ammonium salt, sea water, etc.) 2. Alkaline solution (such as concentration less than 50% potassium hydroxide solution) |
| Tantalum(Ta) | 1. Hydrochloric acid, sulfuric acid, oxidizing acid, aqua regia 2. Chlorine dioxide, ferric chloride, hypochlorous acid, sodium cyanide, lead acetate, etc. |
| Platinum (Pt) | Acid, alkali, salt solution |
| Tungsten carbide (WC) | Handled neutral industrial sewage and domestic sewage. Resistant to solid particle interference |
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Of course, in addition to electromagnetic flowmeters. To measure acidic media, oval gear flowmeters, vortex flowmeters, and turbine flow sensors made of acid-resistant materials can also be used. The parts in contact with the medium are made of acid-resistant materials, which can resist general acidic substances.
Such fluids include solvents, solutions, ethanol, diesel, and clean water.
Turbine flow meters are less expensive and usually have chemical flow sensors that have a compact design.
These flow meters are volumetric, meaning that they can measure liquids passing through them either indirectly or directly.
Some of the advantages of using turbine flow meters are that they have high accuracy, can measure high pressure, and have a large measuring range.
When the clamp-on ultrasonic flowmeter is working, the liquid does not directly contact the flowmeter. So it is suitable for various corrosive liquids. But its accuracy rate is relatively low.
Extended reading: Sludge flow meter for sewage treatment return activated sludge system
Commonly used chemical liquid-flowmeter recommendation
| Chemical Fluids | Available Flow Meters |
| Sulfuric acid | Electromagnetic flowmeter, PTFE gear flowmeter |
| Acetic acid | Electromagnetic flowmeter, PTFE gear flowmeter |
| Hydrochloric acid | Electromagnetic flowmeter, PTFE gear flowmeter |
| Chemical sewage | Electromagnetic Flowmeter |
| Liquid nitrogen | Cryogenic turbine flowmeter |
| Hydrogen peroxide | Electromagnetic Flowmeter |
| Asphalt | Gear flow meter |
Of course, the choice of flowmeter also needs to be determined according to the actual measurement parameters.
More chemical liquid flow measurement solutions
Sino-Inst, Manufacturer for Chemical Flow Meters. These chemical flow meters are easy to use and install on hose ends, pumps or fluid transfer systems. These chemical flow meters are designed for today’s pesticides, fertilizers, and many other chemicals.
Each chemical flow meter has different measurement materials and different measurement characteristics. Compatible with other chemical liquids or oils.
Sino-Inst’s Chemical Flow Meters, made in China, Having good Quality, With better price. Our flow measurement instruments are widely used in China, India, Pakistan, US, and other countries.
If you are not sure which chemical flow meter is right for your measurement? Please feel free to contact our sales engineers. Based on years of experience in measuring chemical fluid flow, we will help you find the right chemical flow meter.
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Wu Peng, born in 1980, is a highly respected and accomplished male engineer with extensive experience in the field of automation. With over 20 years of industry experience, Wu has made significant contributions to both academia and engineering projects.
Throughout his career, Wu Peng has participated in numerous national and international engineering projects. Some of his most notable projects include the development of an intelligent control system for oil refineries, the design of a cutting-edge distributed control system for petrochemical plants, and the optimization of control algorithms for natural gas pipelines.