Uniweld UNF3 Nitrogen Flow Indicator with 1/4-Inch Female Flare Inlet Connection and 1/4-Inch Male Flare Outlet Connection


Uniweld UNF3 Nitrogen Flow Indicator with 1/4-Inch Female Flare Inlet Connection and 1/4-Inch Male Flare Outlet Connection
Updated on : September 15, 2017
Category : Gas Regulators
Price Starting at: : $51.12
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Uniweld UNF3 Nitrogen Flow Indicator with 1/4-Inch Female Flare Inlet Connection and 1/4-Inch Male Flare Outlet Connection

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Amazon Price: $62.27 $51.12 You save: $11.15 (18%). (as of December 12, 2017 6:12 am – Details). Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on the Amazon site at the time of purchase will apply to the purchase of this product.

*New and improved version is the Uniweld NV1 Nitrogen Flow Indicator* Uniweld UNF3 Nitrogen Flow Indicator provides extremely low pressure precision gas flow control for nitrogen purging applications during the brazing of copper tubing in Air Conditioning and Refrigeration systems. 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. The UNF3 Nitrogen Flow Indicator uses a float ball to visually confirm the nitrogen is flowing and allows the technician to first flush the copper lines at 25-35 CFH and then reduce the flow to 3-4 CFH during the brazing process thus conserving and saving nitrogen. If the ball does not rise in the tube there is no flow of nitrogen only static pressure and oxygen is not being displaced. The UNF3 maximum inlet pressure is 50 PSI and must be connected to a Nitrogen Regulator with 1/4 inch male flare outlet connection (Uniweld Part No. RHP400, RHP500, RHP800 – Sold Separately) to control the nitrogen gas pressure.

Customer Reviews

Guarantees flow with visual indicator, takes out the guesswork knowing you have purge and limits waste.

 on August 5, 2017
By CRS
Works as described, with the price of gasses rising and the necessity ,for brazing with nitrogen as a page not going away anytime soon, this unit keeps you in line not wasting gas, and with its indicator ball floating on a stream of gas while in use, theres no more guessing if its actually purging your lines.

Thank you Uniweld.

2 people found this helpful.
 on July 22, 2016
By Keith Adelbai
Does what It supposed to do!

Very useful inert gas flow rate meter

 on May 21, 2017
By Delvis Gari
Wish it had better graduations for inert gas flow rate but it does the job. The metal body seems solid, however, the plastic flow rate indicator housing feels cheaply made. Overall, for the price paid this is a very nice adjustable flow rate meter from Uniweld but it could use some minor design tweaks to make it outstanding.

I recommend

 on May 15, 2017
By Sean "Skip" Hunt
Works like a charm

Five Stars

 on June 21, 2017
By Jose Gerardo Castaneda Zapata
great

nice tool

 on May 25, 2017
By hhottboy
works as advertised

Uniweld customer service rocks

2 people found this helpful.
 on October 25, 2013
By josh hwang
I thought I had gage opened on my Nitrogen for the flow meter running.

Five Stars

 on August 14, 2017
By Vlady
exelente

Five Stars

 on September 8, 2017
By fred eller
A+

A great tool to use to save on nitrogen when brazing

One person found this helpful.
 on August 15, 2015
By Don S.
A great tool to use to save on nitrogen when brazing. Sure the ball doesn’t come up onto the scale at 3 cfh but you can still read it. I have saved enough on nitrogen to pay for it already. A must have for anyone that brazes copper for HVAC.

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