Nitrogen Flowmeter 0.25–2.5 L/min - Hakko FX-791

Overview

The Hakko FX-791 is a compact nitrogen flowmeter engineered for use with Hakko N₂ soldering iron systems. It provides precise flow regulation and monitoring, enabling controlled nitrogen supply for lead-free soldering applications. The unit features an integrated pressure gauge and gas discharge valve for safe, reliable operation.

Key Features

• Compact, space-saving design measuring 70×121×134 mm
• Flow rate range: 0.25 to 2.5 L/min with fine adjustment capability
• Recommended operating range: 0.5 to 1.5 L/min (adjustable per tip shape)
• Integrated pressure gauge for discharged gas monitoring (0.2 MPa / 2.0 kgf/cm²)
• Gas discharge valve for safe on/off control
• Compatible with various Hakko N₂ soldering iron models
• Supports high-purity nitrogen supply (99.9% concentration at ~1 L/min output)
• Ideal for lead-free solder applications

Technical Specifications

Applications

The FX-791 flowmeter is essential for nitrogen-assisted soldering systems, particularly in lead-free solder applications where precise gas flow control ensures consistent joint quality and reduced oxidation. Suitable for electronics manufacturing, rework stations, and precision soldering environments.

Important Notes

The gas flow control knob is designed for fine adjustment only. Do not use it to open or close the N₂ gas supply, as this may damage the unit. Use the dedicated gas discharge valve for on/off control. The Hakko FX-780 N₂ gas generator must be purchased separately.

Scope of Delivery

• FX-791 Nitrogen Flowmeter
• Instruction manual