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How High Pressure Nitrogen Can Work for You?
There are numerous applications that require high pressure nitrogen. Some of those applications are gas assist – plastic injection molding; storing large volumes of nitrogen and laser cutting. Many companies are currently using high pressure cylinders/ dewars for these applications. There are numerous disadvantages of using high pressure cylinders/ dewars such as running out during operation; cost and safety. The biggest problem is not being able to use all of the gas from the cylinder/ dewar. If you require 1000 psig and are using 2200 psig cylinders you are sending back almost half of the unused nitrogen. A way to eliminate this problem is to generate high pressure nitrogen in house. There are typically two ways to boost the nitrogen pressure from a nitrogen generator. Below are two main methods to generate high pressure nitrogen.
Air-operated nitrogen boosters:
Air operated nitrogen boosters consist of a large and small area reciprocating air driven piston directly coupled by a connecting rod. The gas piston functions in a high-pressure gas barrel section. High-pressure inlet and outlet check valves are enclosed in each gas barrel end cap. When air is supplied to the air drive inlet, the air drive section that includes a cycling spool and pilot valves provide a constant reciprocating action. To prevent air contamination from entering the gas stream, dynamic seals are used. Cooling is provided through an intercooler on the interstage line and by routing the cold exhausted drive air through an individual jacket that surrounds the gas barrel.
Advantages:
1. 100% oil-free
2. Air operated – no electrical energy used
3. Ideal for dangerous areas since no electricity is required
Reciprocating nitrogen boosters:
There are both oil free and oil lubricated units available. The application the industry requires specifically will dictate which system is best suited for that application.
Reciprocating compressors use pistons driven by a crankshaft. They are multi-staged, and are normally driven by an electric motor. The discharge pressure of a nitrogen generator varies but normally operates between 75 psig and 150 psig. The nitrogen is directed into the intake side of the booster compressor. At this point the nitrogen will go through the various stages of compression until it reaches the required operating pressure of the application. If the high pressure nitrogen booster is oil lubricated design the nitrogen will then enter a filtration system to get rid of any oil carryover. If any trace amounts of oil cannot be tolerated in the process an oil-free compressor is your best option. From there the nitrogen will be stored in high pressure DOT cylinders and regulated down to the necessary point of use pressure.
Advantages:
1. Designed for constantly active applications
2. Best suited for … high flow applications
A knowledgeable and experienced nitrogen generator supplier will be able work with you to determine which technology works best for you.
Author Resource:-
Pat McCloskey has established himself as a renowned leading supplier of non-cryogenic nitrogen generators in North America. Determining the appropriate sized generators based on specific company need is something Pat takes very seriously. His company's nitrogen gas generators produce dry gas from a compressed air source; in the quantity you need, at low cost. Purchasing nitrogen gas generators from Pat guarantees quality nitrogen generation products backed by unsurpassed service as well as the best warranties in the industry.
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