The Types of Nitrogen Purging Systems

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Impurities, oxidation, and unwanted vapors (or gases) can occur within many industrial manufacturing systems. The presence of these gases runs the risk of creating a hazardous or explosive environment within the system. Nitrogen purging is the safest method for eradicating any potentially damaging or threatening ambiance by using a technique that implements an inert nitrogen atmosphere.

Industries such as pharmaceuticals, oil and gas, and chemicals integrate the process of nitrogen purging as an essential part of their daily operation. Where the presence and the contamination of threatening gases are likely, a nitrogen purge system is an absolute requisite.

The Method of the Nitrogen Purge

Nitrogen purging is a method of successful displacement of any dangerous gas, harmful vapor, damaging oxygen, or unwanted moisture to ensure the environment within the equipment or a system is dry.

Purging is a well-established and long recognized use of nitrogen gas. For example, tanks that are full of hydrocarbon liquids have vapor space that exists at the top of the tank where hydrocarbon vapors gather. When emptying an atmospheric tank, the air is drained and can become subject to friction or static electricity, which can easily ignite or explode. A nitrogen purging system, however, functions to eradicate the vapor space with nitrogen gas, thwarting the hazard of explosion.

A nitrogen purging system is ideal for substances that attract water by either absorption or adsorption. Substances like this include ethanol, glycerin, methanol, and concentrations of sulfuric acid, lye, or honey.

The Merits of a Nitrogen Purging System

The main objective of a nitrogen purging system is to purify pipes and other components in a manufacturing process that can house various contaminants. Nitrogen is a reliable inert gas that is both economical and safe. The benefit of a nitrogen purge is that it eradicates the risks associated with unsafe elements, including oxygen. It creates a more stable, dry, and safe environment. Depending on the method of nitrogen purging used, the nitrogen may flow at either low or high pressures.

What are the Different Kinds of Nitrogen Purging Systems?

There are four main processes for a nitrogen purge, each of which requires different equipment. The four processes involved include:

  • Displacement purging
  • Dilution purging
  • Pressure transfer of liquids
  • Pressure hold vacuum process

Displacement purging

Manufacturing equipment that is designed with a basic cross-section (such as pipelines) is ideal for displacement purging. This functions by using a scraping piston (or pig) which is thrust by the pressure of the nitrogen. As the scraping piston propels through the line, it purges the unwanted matter. The volume of the pipeline determines the amount of nitrogen that is needed to perform this task. There is no mixing involved (as in the dilution method) and it is possible to separate nitrogen and additional material with an inert fluid.

Dilution purging

Systems that are more complex than a straightforward pipeline, and equipment that includes cross-sections, are ideal for dilution purging. An example of this includes columns, reactors, or kilns. The nitrogen is mixed with the specific gas needed to be purged in the system. The mixture is purged from the entry point to the exit point. Emphasis is placed on the location(s) of these two points. Diluting combined with displacing the unwanted matter results in the creation of a more inert atmosphere.

Pressure transfer of liquids

In some instances, the objective is to move liquids without the use of a pump. Nitrogen is the perfect choice to pressurize the headspace inside the container or system in order to do so. This is particularly useful where space is constricted or where materials that influence pump efficiency are present. By using the pressure transfer of liquids, the chance of oxidation is significantly reduced.

The pressure-hold vacuum process

There may be conditions present that prevent the nitrogen from sweeping away harmful substances. In this case, the container is instead pressurized with nitrogen. This creates the conditions for dilution to occur and the material is then vented. The pressure hold vacuum process is then repeated. This is an effective method for containers that have only one opening. The amount of nitrogen needed for this process is based on how many times pressurized purges are needed to reduce the unwanted contaminant to the desired level.

On Site Gas is the Leader in Nitrogen Purging Systems

On Site Gas is best-in-class when it comes to matching nitrogen purging systems to your needs. To learn more about which nitrogen purging system is best for you, consult with a member of our customer care team today. Our experts are here to help you choose the nitrogen purging solution that works for you.

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On Site Nitrogen Gas Systems vs. The Competition

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When you need a top-quality system producing continuous, high-purity nitrogen for your business operations, there is no other choice but On Site Gas. We will provide you with the perfect system to meet your needs, fit your budget, and ensure higher revenue and return on investment.  

Other Companies Can’t Compete with On Site Gas 

The founder of On Site Gas, Frank X. Hursey, was a pioneer in the field of pressure swing absorption technology. As the National Aeronautics and Space Administration (NASA) was making strides by sending men to the moon, Mr. Hursey was an integral part of its technological team. He helped develop the oxygen systems that allowed astronauts to breathe while in orbit. After his career with NASA, he took the knowledge he gained and created On Site Gas — a company that designs and builds oxygen- and nitrogen-generating systems that manufacturers can use at their production facilities.  

On Site Gas is known as the industry leader in the production of nitrogen and oxygen generation systems that businesses across many industries can use to replace nitrogen or oxygen cylinder or bulk delivery. This not only allows a company to have a constant, uninterrupted flow of oxygen and nitrogen, but it also saves  up to 80% over traditional gas delivery methods.  

All our products are proudly made in the United States and shipped around the world.. Our reach and experience also put us in the lead over our competition with over 30 years of experience. On Site Gas has established a global reach providing the best products on the market to companies in over 100 countries. 

On Site Gas founded by such a notable figure in space exploration combined with more than 30 years in business, makes this company the best choice when you need a nitrogen generation system. Other companies have followed us but have far less experience in a field where precision custom design is crucial to commercial applications. On Site Gas uses the latest technology to create oxygen or nitrogen generation systems that can be specifically designed to suit any company’s requirements. If you run a business in any of the following fields, our systems will likely benefit your production and pay for itself: 

  • Food packaging 
  • Electronics manufacturing 
  • Metal and heat treating 
  • Manufacturing processes 
  • Adhesive purge 
  • Medical procedures 

The Generators We Provide Are Just Right for Your Business 

Every business has its own specific needs and demands. Nitrogen generation systems are not a one-size-fits-all solution, which is why On Site Gas specializes in providing a wide variety of systems and go above and beyond by custom designing the specs to suit your exact needs. If you are not sure where to start, consider the most popular products that our clients find to be perfect for their applications. 

  • Pressure Swing Absorption (PSA) nitrogen generator systems. PSA systems are known for their ease of use, as they create nitrogen by simply separating it from oxygen in the air around you.  
  • Nitrogen membrane generators. One of our top-selling items, these turn-key generator systems arrive at your location ready for you to attach to your system.  
  • Nitrogen container systems. These systems are cost-effective and highly efficient. They are built right into an ISO container that can be transported to your facility easily by truck and can be hooked up when they reach your site. 
  • Nitrogen cylinder filling systems. If you are accustomed to using bottled gas and wish to eliminate the need for delivery, these systems allow you to fill your cylinders with nitrogen. 
  • Custom engineered nitrogen generation systems. When your applications require very detailed specifics, our custom engineered systems are the way to go. They are designed to meet your specs so that they are a perfect fit for your individual needs. 
  • Used nitrogen generators. On Site Gas also offers a variety of nitrogen generation systems that have served other companies, but have been completely refurbished and made new for your company. 

As you can see, our inventory is vast and our custom design capabilities mean that the sky is truly the limit when it comes to what you can do with your unique nitrogen generator system. 

Clients Choose On Site Gas Over the Competition 

When you work with On Site Gas to create a perfect solution for your nitrogen generation needs, you know you are getting a top-quality product from a company that has built a strong reputation for more than 30 years. We are focused on our brand and have developed innovations that you can’t expect from anywhere else. Other companies that try to build other products that are not related to nitrogen generation simply can’t keep up with the technology that On Site Gas develops. 

We are a large company that can also provide creative solutions to your company’s demands. Regardless of your size, location, or specialty, On Site Gas can assure you that investing in our systems will save you money and increase your revenue for years to come. Reach out to us today to learn more.  

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Nitrogen Gas Generators for Heat Treating

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Heat Treating, Nitrogen Gas
Nitrogen gas is a lightweight, odorless gas that is common and unassuming, yet, without it, the heat treating process wouldn’t be nearly as effective. This common gas, when produced at a purity of 95% to 99.999% by our N2 generators, is instrumental to ensure a strong and beautiful end result, whether in a kiln or a furnace.

How Nitrogen Gas Helps with Heat Treating

During the heat treating process, two things are found in abundance: heat and pressure. Whether metal or another material is undergoing the heat treating process, oxygen is the enemy. Any metal over 600 degrees Fahrenheit will oxidize if it comes into contact with oxygen. This causes the product to become discolored and weakened. Even if it finishes the heat treating process intact, the item will not be as strong or as beautiful as it could be if no oxygen was present.
That’s where nitrogen gas comes in. Heat treating facilities use nitrogen gas to purge the oxygen from the air to guarantee their product will not come into contact with this quality-ruining gas. With a never-ending supply of nitrogen gas from an N2 generator, they can consistently keep the air free from oxygen and shield the iron, steel, and other metals from oxidization.

How On Site Gas Systems Helps Heat Treating Companies

Since nitrogen gas is so crucial to heat treating, it’s clear that it would be detrimental to run out of the supply during the process. With an N2 generator from On Site Gas Systems, this no longer has to be a concern. Companies can produce their own pure nitrogen gas right onsite, so they can rest easy knowing they will never run out.
Beyond that, heat treating companies love their N2 generators from On Site Gas Systems because they don’t have to bother with scheduling deliveries of nitrogen cylinders, and then waiting around for the driver to show up. They also don’t have to panic if a truck breaks down or there is inclement weather that causes the deliveries to be halted.
Heat treating companies especially love the amount of money they save with an N2 generator from On Site Gas Systems. Not only does an N2 generator quickly recoup the cost of the initial investment in the amount of nitrogen gas it produces, it also improves the quality of the product that is manufactured so less money is wasted on ruined materials.
If you are ready to improve the efficiency of your heat treating process, contact us today. We would love to get you set up with a custom N2 generator system to meet your manufacturing needs.

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