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In industries requiring a steady, high-purity supply of oxygen and nitrogen — such as metal production, fabrication, chemical processing, pharmaceuticals, electronics, food & beverage, and more — on-site cryogenic generation ensures reliability, precise quality control, and significant long-term cost savings compared to external cylinder or bulk supplies.

Sanghi Overseas is the dedicated export house of Sanghi Organization, an independent Indian manufacturer with its own production facility near Mumbai. Sanghi Organization designs and builds the plants, while Sanghi Overseas handles all international sales, delivery, commissioning, and support.

This guide explains the cryogenic air separation process step by step and highlights why plants manufactured by the Sanghi Organization (exported via Sanghi Overseas) are trusted for long-term performance and efficiency.

The Cryogenic Process – Step by Step

Sanghi ORG oxygen nitrogen gas plants produce high-purity gases by liquefying atmospheric air at cryogenic temperatures and separating oxygen and nitrogen through fractional distillation based on their boiling points (oxygen –183°C, nitrogen –196°C).

Air Compression Filtered ambient air is compressed to a medium pressure of 32–35 kg/cm² using reliable, efficient compressors.
Purification Compressed air passes through a twin molecular sieve system that removes moisture, CO₂, hydrocarbons, acetylene, and other impurities to ensure clean air enters the cold box.
Cooling in Heat Exchangers Purified air flows through high-efficiency aluminium plate-fin heat exchangers in the insulated cold box, where cold waste nitrogen and product gases provide regenerative cooling and energy recovery.
Refrigeration via Expansion Engine A portion of the air expands in a highly efficient expansion engine, creating the deep refrigeration required for liquefaction while contributing to low overall power use.
Distillation in Double Columns Liquefied air enters the high-pressure and low-pressure distillation columns. Nitrogen (more volatile) is collected from the top; oxygen is withdrawn from the bottom — both at high purity.
Product Recovery and Delivery Gases are warmed to ambient temperature in the heat exchangers and supplied as pipeline gas. The integrated cryogenic liquid oxygen pump (standard feature) allows direct high-pressure cylinder filling (up to 200 kg/cm²) or optional liquid production for storage.

The plant supports continuous industrial operation. After periodic defrost cycles (typically every 8–12 months), it reaches full production in about 8–10 hours.

Why Sanghi Organization Plants Deliver Superior Performance

Sanghi Organization cryogenic oxygen nitrogen gas plants are built for durability, low operating costs, and extended service life:

Medium-pressure design (32–35 kg/cm²) for reduced power consumption
Efficient expansion engine providing excellent refrigeration and energy recovery
Robust cold box and column construction proven to last decades in heavy-duty applications
Compact layout with integrated cylinder filling capability
Specific power consumption as low as ~1.0 kWh per m³ of oxygen for capacities of 250 m³/hr and above
Simultaneous production of 99.6% oxygen and high-purity nitrogen (up to 99.9999% with modifications)

Many Sanghi Organization plants installed 20–30 years ago remain in reliable service today, demonstrating exceptional engineering quality compared to other industrial gas plant manufacturers.

Why Customers Choose Sanghi Overseas

Consistent high-purity output for critical processes
Strong ROI through energy efficiency and minimal downtime
Comprehensive after-sales support with original spares and service, even for older plants

For projects in India, contact the Sanghi Organization directly. For international/export needs, Sanghi Overseas offers end-to-end assistance.

Explore detailed specifications, capacities, and options:

Frequently Asked Questions

What is the main advantage of cryogenic oxygen nitrogen gas plants?
How do Sanghi ORG oxygen gas plants achieve strong energy efficiency?
Why do many users prefer Sanghi ORG nitrogen gas plants?
How long does it take for a Sanghi ORG oxygen gas plant to reach full production after defrost?
Can Sanghi ORG oxygen nitrogen gas plants produce both gases at high purity simultaneously?
What kind of support is available for Sanghi ORG oxygen gas plants and Sanghi ORG nitrogen gas plants?
What purity levels do Sanghi ORG oxygen nitrogen gas plants typically achieve?
What is the typical power consumption for a Sanghi ORG oxygen gas plant?
What is the expected lifespan and maintenance for Sanghi ORG oxygen gas plants?
Are Sanghi Overseas and Sanghi Organization the same as Sanghi Oxygen?

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Sanghi Overseas is the export arm of Sanghi Organization, manufacturing and exporting Oxygen Gas Plants, Nitrogen Gas Plants, Acetylene Gas Plants, Nitrous Oxide Gas Plants, CO₂ Gas Plants, and Gas Plant Ancillaries & Spares, with over 1,100 installations across 90+ countries. With over four decades of engineering excellence, we design and manufacture ISO 9001:2015-certified, energy-efficient, high-performance industrial gas plants that deliver reliable operation, high gas purity, and low operating costs. Our customized solutions are trusted by industries including healthcare, pharmaceuticals, laboratories, steel, fabrication, chemicals, food processing, agriculture, electronics, glass manufacturing, engineering, and oil & gas, making Sanghi Overseas a trusted partner for industrial gas plant projects worldwide.

Backed by advanced manufacturing facilities and experienced engineers, Sanghi Overseas provides complete turnkey solutions, from plant design and manufacturing to installation support, commissioning, technical assistance, and after-sales service. Whether you require a high-capacity Oxygen Gas Plant, Nitrogen Gas Plant, Acetylene Gas Plant, Nitrous Oxide Gas Plant, CO₂ Gas Plant, or premium-quality Gas Plant Ancillaries & Spares, we deliver customized solutions that meet international quality standards and industry-specific requirements. Our commitment to innovation, quality, and customer satisfaction enables businesses worldwide to achieve safe, efficient, and cost-effective industrial gas production.

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