Uniweld
Nitro Vue Flow Indicator with 1/4” Flare
The UW-NV1 NitroVue™ helps technicians visually confirm nitrogen flow while purging and brazing copper tubing in HVAC/R systems.
Technical snapshot
Key NitroVue™ flow settings.
The UW-NV1 uses a bright orange float ball, a clear viewing tube and a precision adjustable valve to help control nitrogen flow during HVAC/R brazing work.Nitrogen purging and brazing
Confirm flow before heat goes on the copper.
The NitroVue™ is built for HVAC/R technicians who purge copper pipework with nitrogen during brazing. It shows when nitrogen is flowing, helps control the flow rate, and supports cleaner internal pipework by reducing oxygen inside the tubing.
- Bright orange float ball gives quick visual confirmation of nitrogen movement.
- Precision adjustable valve controls the low nitrogen flow used during brazing.
- Clear purge and braze flow bands help technicians move from high purge flow to lower brazing flow.
- Aluminium body with open viewing windows protects the tube while keeping the indicator easy to read.
- Designed for use with a nitrogen regulator set to the correct delivery pressure.
What it helps protect
Nitrogen flow displaces oxygen inside copper tubing during brazing. Keeping nitrogen moving helps reduce internal oxidation and scale that can later travel through refrigeration and air conditioning systems.
- Copper line sets during brazing and installation work.
- TXVs, filters, valves and small internal system passages.
- System cleanliness before evacuation and commissioning.
Flow window guide
Read the ball, then set the flow.
The flow indicator label gives technicians a quick way to move from an initial purge to a lower brazing flow while keeping visual confirmation at the tool.
Connect the UW-NV1 to a nitrogen regulator and set the delivery pressure to suit the tool’s operating instructions.
Open the valve until the orange ball rises into the purge range, then allow nitrogen to displace oxygen inside the tubing.
Adjust the valve down to the braze range so nitrogen continues moving without excessive consumption.
If the ball does not rise, check the cylinder, regulator, valve position and connections before brazing.
Use the UW-NV1 downstream of a suitable nitrogen regulator and connect using the 1/4 in flare fitting path.
The ball should rise when nitrogen is moving. Static pressure alone does not confirm flow through the copper line.
Use the needle valve to move between purge and braze flow settings during installation or service work.
Nitrogen and brazing checks
Set up the system before opening the torch.
The NitroVue™ is a flow-control and indication accessory. Use it with suitable nitrogen equipment, correct regulator settings and proper brazing procedures for the job site.
Related Uniweld products
Useful products for nitrogen, charging and service work.
Internal Omni Tools links for related Uniweld equipment and the wider product range.Useful information & documents
UW-NV1 resources.
Omni Tools product and range links, plus the official Uniweld NitroVue™ product page.Omni Tools links
Manufacturer information
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