Why is it important to understand the difference between gauge and absolute pressure?

Difference Between Gauge and Absolute Pressure Measurement

Pumps and similar systems are built in a way so as to generate and retain pressure. In gas-based systems such as air compressors, the pressure is fairly low. This is because gasses when compressed incessantly makes air molecules huddle nearer to each other in the application of energy. This pressure doesn’t extend to the tubes or chambers of the compressed air systems.

In brief, pressure can be defined as a force acting over a certain area. It’s most commonly measured in pounds per square inch (psi).

There are multiple systems to measure pressure. Two of the most common ones are absolute and gauge pressure. There are quite a few differences between the two that have considerable impact on their use and measurement. Once the purpose behind measuring pressure is identified, the next step involves choosing which system to use: gauge or absolute pressure. This is a crucial decision since choosing the wrong system can severely impact the accuracy of measurements.

The pressure inside a compressed air system is comparatively lower. Hence, even minor deviations such as 10 psi or 20 psi can lead to major operational issues.

Here are the differences between the two systems in great detail:

Gauge Pressure

It’s one of the most commonly used systems of measurement and uses atmospheric pressure as its base value. So, any chamber will equalize based on the atmospheric pressure, when vented. This makes it easy for calculations and tests since the atmospheric pressure doesn’t have to be subtracted.

Also known as effective pressure, gauge pressure is signified by BARG or BARE and PSIG or PSIE.

Absolute Pressure

Comparatively, absolute pressure is used less frequently, since it signifies zero pressure or a perfect vacuum. A good example of the measurement of absolute pressure can be that of barometric pressure.

Absolute pressure is commonly signified by BARA and PSIA.

Choosing the right system: gauge or absolute pressure

The most fundamental difference between gauge and absolute pressure is that gauge pressure uses atmospheric pressure as its base or zero point whereas absolute pressure uses absolute zero as its base or zero point.

So, if the idea is to measure a type of pressure influenced by atmospheric pressure, it’s best to use a gauge pressure. It will help measure the pressure minus the atmospheric pressure. This is the system used to measure the output of pressure of air compressors.

Again, if the idea is to measure a type of pressure not influenced by atmospheric pressure, absolute pressure is used as a reference. An example of this can be leak testing a sealed container.

VEMC, an authorised Kirloskar pump dealer in Mumbai, supplies centrifugal and industrial water pumps that are ideal for both commercial and industrial operations. We provide the best end-to-end project management services to our clients. For more information on industrial pumps, motors, and other equipment, feel free to contact us at +91 98199 07445. VEMC is ISO 9001:2015 certified and a pioneer in the field of electromechanical engineering products, allied equipment, and services.

How Can You Benefit From KirloSmart Technology For Your Pumps?

KirloSmart is a unique Internet-of-Things (IoT) based software technology that enables users to monitor their pumps remotely from smart devices such as laptops, tablets and mobile phones. No matter where your pumps are located, you can monitor their health and operational behaviour from the comfort of your own location, on a screen. 

The key indicators of a pump’s operating performance are electrical parameters, flow, pressure, temperature and vibration. If the parameter defined range of either is too high, it will indicate that you need to adjust them. With KirloSmart, you have at your fingertips an automated system that is simple, easy to access, and allows you to monitor the pump conditions constantly. 

Here are the pump parameters that the KirloSmart software is capable of monitoring remotely:

  • Pressure
  • Flow
  • Power
  • Voltage
  • Current
  • Frequency
  • Pump and Motor Bearing Temperature
  • Pump and Motor Bearing Vibrations
  • Motor winding temperature
  • Pump run hours 
  • Power factor

With KirloSmart, you can take the route of implementing smart pumps in your facility. An automated system to monitor the pump conditions should ideally increase energy efficiency, minimise downtime and enhance overall operation. Enabling these modern pumps through the KirloSmart technology can offer users a plethora of benefits. Let’s take a look at what these are.

Flexibility: Of course, the ability to monitor the pumps from anywhere opens up a world of possibilities, and allows you to be flexible with regards to your own location.

Reduced operational cost: The cost of both repair and labour can be cut down significantly.

Reduced unplanned breakdown: Since the pump health conditions are monitored constantly, it becomes easier to cut down the number of times that an unplanned breakdown occurs. 

Improved plant and process efficiency: The state of a plant is easier to manage and maintain, and workflows are made even more efficient with the use of IoT pumps. 

Optimized safety and reliability: Remotely monitoring pumps makes the whole process more reliable and safer.

Longer lifespan of equipment: With KirloSmart technology, all the equipment that you use in your plant will gain a longer shelf life through less wear and tear. 

Improved equipment efficiency: All the equipment used in the process will become even more efficient through automation.

Reduced downtime: With labour being conserved and the entire monitoring system automated, equipment downtime can be reduced.

Reduced cost of assets: The cost of items like modems, servers and computers will further be saved.

So, for effective remote management of your pumps, KirloSmart is the smart solution. What’s more, KirloSmart can be deployed for any type and make of pump! The solution was developed indigenously and can cater to customer requirements across segments.

For more information on industrial pumps, motors and other equipment, feel free to contact us on +91 98199 07445. We would be glad to assist you in finding the best match for you, based on your requirements. VEMC is a solar energy company in Navi Mumbai which provides end-to-end project management services to its clients. VEMC is ISO 9001:2015 certified and a pioneer in the field of electromechanical engineering products, allied equipment, and services. For inquiries, contact us at marketing@vemc.co.in.