Nitrogen Generator

How To Correctly Select A Nitrogen Generator For Industrial Heat Treatment Equipment

Before selecting a nitrogen generator, it's essential to understand the specific nitrogen requirements of different furnace types during operation:

Mesh Belt Furnace:

Features: Continuous production, high output, suitable for large-scale heat treatment of small and medium-sized parts, such as carburizing, quenching, and tempering.

Nitrogen Requirements:

● High and Stable Flow Rate: Due to continuous production, a continuous and stable nitrogen supply is required to maintain the protective atmosphere within the furnace.

● Moderate Purity Requirements: Depending on the heat treatment process, there are certain purity requirements for nitrogen, typically above 99%.

● Low Pressure Requirements: Generally, the furnace pressure is not high, so the nitrogen supply pressure requirement is not high.

● Dew Point Requirements: Depending on specific process requirements, a lower dew point may be necessary to prevent oxidation or decarburization.

Pit Furnace:

Features: Intermittent production, suitable for heat treatment of large parts such as long shafts and discs, including carburizing, nitriding, quenching, and tempering.

Nitrogen Requirements:

● Large Flow Rate Fluctuations: Nitrogen flow rate requirements vary at different stages such as charging, heating, holding, and cooling. Start-up and heating phases may require larger flow rates for rapid atmosphere replacement.

● High Purity Requirements: Especially for processes requiring bright heat treatment, high nitrogen purity is required to prevent surface oxidation of parts.

● Moderate Pressure Requirements: The furnace has good sealing properties, so the nitrogen supply pressure requirement is not high, but sufficient pressure must be ensured to overcome pipeline resistance.

● Dew Point Requirements: Depending on specific process requirements, a lower dew point may be required.

Vacuum Furnace:

Features: Performs heat treatment under vacuum or low-pressure atmosphere, suitable for precision parts requiring extremely high surface quality and deformation control, such as mold steel and aerospace components.

Nitrogen Requirements:

● Relatively small usage: Primarily used for furnace purging, cooling, or as a gas source for some low-pressure atmosphere processes.

● Extremely high purity requirements: To avoid disrupting the vacuum environment and affecting product quality, nitrogen purity is extremely high, typically 99.99% or higher.

● Low pressure requirements: Primarily used for atmosphere replenishment; pressure requirements are not high.

● Extremely low dew point requirements: Dry nitrogen must be used to ensure vacuum levels and avoid the influence of moisture on materials.

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