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Uniweld NV1 Nitro Vue Flow Indicator with 1/4" Flare Fittings Single-Gas Flowmeter, Regular, Silver

4.6 4.6 out of 5 stars 805 ratings
$64.93
FREE Returns
Eligible for Return, Refund or Replacement within 30 days of receipt
This item can be returned in its original condition for a full refund or replacement within 30 days of receipt.
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Purchase options and add-ons

  • Easy to read flow indicator label and the precision adjustable valve give complete control over the low flow of nitrogen gas
  • Bright orange float ball visually confirms the flow of nitrogen gas
  • Purge the copper lines at 20+ SCFH and then reduce the flow to Braze at 3-5 SCFH during the brazing process
  • Protected from over pressure with a reseatable safety blow off that opens at 200 psi
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Uniweld NV1 Nitro Vue Flow Indicator with 1/4" Flare Fittings Single-Gas Flowmeter, Regular, Silver

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What's in the box

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    • Product Description

    Uniweld NV1 NitroVue Nitrogen Flow Indicator is nitrogen purging simplified. The easy to read flow indicator label and the precision adjustable valve give complete control over the low flow of nitrogen gas during the brazing of copper tubing in Air Conditioning and Refrigeration systems. The bright orange float ball visually confirms the flow of nitrogen gas and allows the technician to first "Purge" the copper lines at 20+ SCFH and then reduce the flow to "Braze" at 3-5 SCFH during the brazing process thus conserving its consumption and reducing operating cost. The nitrogen must be flowing to displace the oxygen inside the tubing during the brazing process, preventing internal oxidation and the resulting scale. Scale build up inside the tubing can cause blockage in the TXV and within the Air Conditioning and Refrigeration system resulting in premature failure. If the orange ball does not rise in the tube there is no flow of nitrogen, only static pressure and oxygen is not being displaced. The NV1 must be connected to a Nitrogen Regulator with the delivery pressure set at 60 psi to control the nitrogen gas pressure. The NV1 can be used with complete confidence because it is protected from over pressure with a reseatable safety blow off that opens at 200 psi.

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    Customer reviews

    4.6 out of 5 stars
    4.6 out of 5
    805 global ratings

    Customers say

    Customers like the quality, ease of use, value, and nitrogen saving of the brazing kit. For example, they mention it works as designed, is easy to read, and is good value for the money. That said, some say it saves a lot of nitrogen when brazing copper lines sets.

    AI-generated from the text of customer reviews

    60 customers mention46 positive14 negative

    Customers like the quality of the product. They say it works as designed, is easy to use, and works every time. Customers also mention that it's durable, and is well made from machined aluminum.

    "Showed up on time and in perfect condition. I used on a job the next day worked perfectly. I would highly recommend!Thnaks" Read more

    "I used a different nitrogen flow but this one was easy to use and works everytime." Read more

    "This Uniweld nitrogen flow indicator is nicely made from machined aluminum and is easy to use...." Read more

    "...Appears well made and durable enough to keep loose in the tool box/bag unlike the bulkier ones...." Read more

    16 customers mention16 positive0 negative

    Customers find the product easy to use and great for quick set up when flowing nitro for brazing. They also say it's easy to read, so there's no more wasting nitrogen or rebrazing due to blown out.

    "I used a different nitrogen flow but this one was easy to use and works everytime." Read more

    "...flow indicator is nicely made from machined aluminum and is easy to use...." Read more

    "Easy to use it dose the job good" Read more

    "...Purging and brazing was so much easier.Easy to install, control and tells you if you still have nitrogen in the pipes...." Read more

    8 customers mention8 positive0 negative

    Customers appreciate the value of the product. They say it works great and saves them money, time, and frustration.

    "You'll save a lot of money, time and frustration with this device...." Read more

    "Great lower cost alternative!!! Works brilliantly and markings make it absolutely fool-proof!..." Read more

    "Worth every penny and easy to use" Read more

    "...You can trickle the flow or blow it out. The device is well worth the money." Read more

    4 customers mention4 positive0 negative

    Customers are satisfied with the nitrogen saving of the product. They mention that it saves a lot of nitrogen when brazing copper lines and prevents gas from wasting.

    "watch a you tube video on it. saves your gas from wasting, it is tough enough for the tool bag...." Read more

    "This will save a lotta nitrogen when Im brazing copper lines sets" Read more

    "Easy to read, no more wasting nitrogen or rebrazing due to blown out silfos!..." Read more

    "Saves nitrogen..." Read more

    3 customers mention3 positive0 negative

    Customers like the flow regulator. They mention it's a good flow regulator, the flow indicator works well, and the meter is durable.

    "NV1 Nitro Vue Flow Indicator works well. Can easily see flow & seems very durable." Read more

    "Nice flow meter..." Read more

    "Good flow regulator..." Read more

    WORKS BRILLIANTLY!!!
    5 Stars
    WORKS BRILLIANTLY!!!
    Great lower cost alternative!!! Works brilliantly and markings make it absolutely fool-proof! Regulation is not as accurate as the more expensive rigs but the amount of nitrogen used is comparable. Some have noted it not fitting, due to clearance to the bottle. Be advised that this rig needs to be mounted in a straight, downward position. My regulator outlet sits approximately 4 1/4” from the center of the bottle and leaves about a 1/4” clearance. Overall, I’m extremely pleased with it performance and price point.
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    Top reviews from the United States

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    James M Hashbarger
    5.0 out of 5 stars As advertised
    Reviewed in the United States on January 1, 2024
    Verified Purchase
    Showed up on time and in perfect condition. I used on a job the next day worked perfectly. I would highly recommend!
    Thnaks
    Helpful
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    calubeda
    5.0 out of 5 stars It really works
    Reviewed in the United States on November 7, 2023
    Verified Purchase
    I used a different nitrogen flow but this one was easy to use and works everytime.
    Helpful
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    common sense
    4.0 out of 5 stars Does the job.
    Reviewed in the United States on June 22, 2015
    Verified Purchase
    I really like this but there is one short coming. Not all regulators hang at the same access port orientation. On my rig my flow indicator is not vertical, but more like going from 11 o clock to 5 o clock if you drew a line through them on a clock. Still works, but doesn't hang perfectly. In my case, the pressure regulator (obviously are movable) rotates just so far and hits the tank so it's not possible to get it straight by moving the regulator. I have leaned the nitrogen tank against the side of a house at an angle, and got the flow indicator vertical that way. It's a small thing that doesn't hurt the end result, but a nuisance to me anyway.
    8 people found this helpful
    Helpful
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    SJK
    5.0 out of 5 stars Uniweld NV1 NitroVue Nitrogen Flow Indicator
    Reviewed in the United States on May 30, 2020
    Verified Purchase
    This Uniweld nitrogen flow indicator is nicely made from machined aluminum and is easy to use. It is very compact and uses a simple flow ball with a color scale marked 3-5 SCFH for brazing and yellow for 20+ SCFH for purging. It has built-in 200-psi overpressure protection. I made up a short piece of 3/8” copper tubing with a couple of flare fittings so I could set it up for vertical use for my nitro tanks. I find it great for quick set up when flowing nitro for brazing. No more bulky and fragile nitro flow gauge setup needed for brazing and to get banged around on the job all day long. This little flow indicator seems to be working just fine for my needs.
    Helpful
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    simpleman
    5.0 out of 5 stars Save money on nitro
    Reviewed in the United States on January 21, 2022
    Verified Purchase
    You'll save a lot of money, time and frustration with this device. Unfortunately not many people I know in my trade want to braze with nitro flowing the line set. Probably because they want to go right of the regulator without a flow meter. That's a big mistake. This device keeps the copper from oxidizing on the inside as well as helps to cool the copper quickly in combo with wet rags after brazing. It flows slow so you'll be able to stretch that tank of nitrogen to its fullest! Cha-ching!
    Helpful
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    Jay
    5.0 out of 5 stars Uniweld NV1
    Reviewed in the United States on February 18, 2022
    Verified Purchase
    The precise metering of Nitrogen should make my tank last forever thus offsetting the initial cost. Appears well made and durable enough to keep loose in the tool box/bag unlike the bulkier ones. It will work well to sweep wet mobile A/C systems next to my high pressure Nitrogen leak down test set-up. A worthy addition.
    Helpful
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    Zippyzap
    5.0 out of 5 stars Work well
    Reviewed in the United States on March 16, 2020
    Verified Purchase
    I completed my first evaporator brazing job with this set, works as advertised. The price is a little steep though.
    Helpful
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    Top reviews from other countries

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    Dan
    5.0 out of 5 stars Uniwield
    Reviewed in Canada on February 24, 2021
    Verified Purchase
    Great product great for purging and brazing refrigeration lines
    One person found this helpful
     Report
    Cliente de Amazon
    5.0 out of 5 stars exelente
    Reviewed in Mexico on December 2, 2020
    Verified Purchase
    excelente
    Report
    Pablo Esteban Perowne
    5.0 out of 5 stars Uniweld NV1
    Reviewed in the United Kingdom on March 5, 2021
    Verified Purchase
    The item arrived in perfect condition and ahead of delivery date. Very pleased with my purchase.
    Report
    dany ouellet
    5.0 out of 5 stars Perfect
    Reviewed in Canada on August 9, 2020
    Verified Purchase
    Work great
    Report
    danny josele gongora medrano
    5.0 out of 5 stars Muy bueno
    Reviewed in Mexico on December 16, 2018
    Verified Purchase
    Muy buena calidad
    Report