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Your cart is empty.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.
Public entity
2025-08-12 17:37:16
I use this during brazing flow and purge rates work fine. Would definitely recommend for anyone
SR Harris
2025-08-04 13:47:30
Easy visual indicator and adjustment of flow. Logical placement off bottom of regulator.
Jesus Mora
2025-08-02 14:29:59
Buena condición
Junior
2025-07-17 13:35:15
Give me the perfect control over nitrogen
James M Hashbarger
2025-06-20 12:20:58
Showed up on time and in perfect condition. I used on a job the next day worked perfectly. I would highly recommend!Thnaks
oscar
2025-04-29 11:11:06
Excelente lo utilizo para regular la salida de nitrógeno del tanque cuando vamos a soldar cobre con plata
SJK
2025-04-23 17:48:34
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.
calubeda
2025-04-19 18:56:10
I used a different nitrogen flow but this one was easy to use and works everytime.
Rodrigues
2025-04-06 14:37:19
Fácil de usar chegou rápido indico a todos
Exelente
2025-04-04 14:04:21
Buen producto
Dan
2025-03-12 10:29:36
Great product great for purging and brazing refrigeration lines
Pablo Esteban Perowne
2025-02-07 11:09:59
The item arrived in perfect condition and ahead of delivery date. Very pleased with my purchase.
Cliente de
2025-01-26 17:22:09
excelente
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