admin, Author at ACCUMAX

What is CGWA?

General Information

As the world is facing shortage of natural resources due to excess and irregular consumption, the Government is stepping forward to preserve the same. There is an excessive usage of water by the industrial premises. To control the wastage and have the accurate record of consumed water, the Ministry of Jal Shakti formed Central Ground Water Authority (CGWA) under Environmental Protection Act.

The functions of the CGWA statutory body are to issue NOC to various industrial and mining projects for extracting the water from the ground in prior. It states the technical specifications for water meter based on the consumption of industry.

Accumax offers Digital water flow meter as per CGWA guidelines:

Design of Magnetic Flow Meter

General Information

The design of the magnetic flow meter is such that the area having direct contact with the water withstands the corrosion. The inside body is made up of polytetrafluoroethylene (PTFE) liner and Stainless Steel electrodes. The straight structured flow design increases the accuracy of the flow measurement and identifies the pressure drop in the same. It is used to measure liquids like water, wastewater, slurries, and other corrosive liquids. The conductivity of the liquid should be equal to or more than 10 micro siemens/cm. The advanced flow meter can measure the flow of liquid from both directions – forward and backward. The low flow range will show less accuracy in large-sized flow meters compared to a small-sized flow meter. Generally, the accuracy remains at 0.5% of full scale.

Different Types of Flow Meters

General Information

The flow meter works on specific predefined conditions. Constant updation in technology has made possible to detect the fluid velocity and send the data directly to the system to maintain record.There are various types of flow meters like

Electromagnetic
Turbine
Ultrasonic
Vortex
Venturi
Coriolis
Oval gear
Thermal mass,etc.

To increase the accuracy of flow rates, it is advisable to learn and install right flow meter as per requirement.

What are Flow Meter applications?

General Information

Flow meters are widely applicable to track the volume of fluid, gas or steam in industries as

Effluent Treatment Plants (ETP)
Pharmaceutical
Pulp & Paper
Food & Sugar
Automation & Process industries
R.O plants
Textile

Sewage Treatment Plant (STP)
Chemical
Mining
Ceramic
Beverage
Steel
Agriculture

They are also helpful to maintain standard quality of the product by accurate measurements.

What are Flow Meters?

General Information

Flow meter devices are used to measure the volume and velocity of fluids, steam or gas flowing through pipes. These meters are also named as – digital water meter, flow indicator, flow sensor, flow gauge, telemetry meters, magnetic flow meters, liquid meter, gas meter, etc. They measure the flow at bore well, streams, rivers, water or oil tanks, gas stations, etc. They also add green values to the environment preserving resources.

The choice of flow meter depends on the nature of liquid passing through pipes. Flow meters are highly accurate with long life span and low maintenance. They can measure the flow easily in all directions- forward, reverse, upward and downward. Digital flow meters track the real time flow enhancing accuracy.

Why Electromagnetic Flow Meter

General Information

Electromagnetic Flow Meters represent about 24% of all flow meters sold today. Applications for dirty liquids are found in the water, wastewater, mining, mineral processing, power, pulp and paper, and chemical industries. Water and wastewater applications include custody transfer of liquids in force mains between water/wastewater districts. Magnetic flow meters are used in water treatment plants to measure treated and untreated sewage, process water, water, and chemicals. Mining and mineral process industry applications include process water and process slurry flows and heavy media flows.

With proper attention to materials of construction, the flow of highly corrosive liquids (such as acid and caustic) and abrasive slurries can be measured. Corrosive liquid applications are commonly found in chemical industry processes and in chemical feed systems used in most industries. Slurry applications are commonly found in the mining, mineral processing, pulp and paper, and wastewater industries.

All measurement principles have their strengths and weakness, which determine when they are the best option.

PROS

The obstruction to the flow is almost nil and therefore this type of meters can be used for measuring heavy suspensions, including mud, sewage and wood pulp.No pressure loss.
They are practically unaffected by variation in density, viscosity, pressure and temperature.
There is no pressure head loss in this type of flow meter other than that of the length of straight pipe which the meter occupies..
They are not very much affected by upstream flow disturbances.Less maintenance.
The meters are suitable for most acids, bases, water and aqueous solutions because the lining materials selected are not only good electrical insulators but also are corrosion resistant.

CONS

Electrical Conductivity of the liquid media required should be equal to or more than 5μS/cm.
Incrustation can cause errors.
Only effective on conductive fluids and materials such as unmixed hydrocarbons and gases cannot be measured.
As the meter always measures the volume rate, the volume of any suspended matter in the liquid will be included.
To avoid any trouble which would be caused by entrained air, when the flow tube is installed in a horizontal pipe-line, the electrodes should be on the horizontal diameter.
To avoid any trouble which would be caused by entrained air, when the flow tube is installed in a horizontal pipe-line, the electrodes should be on the horizontal diameter.