Choosing the right Nitrogen regulator

I am currently electrician/ restricted AC installer (18 kw) I am looking for a nitrogen regulator to purchase. I am working as a Split AC Installer (18kw max)

Since starting in this field I have come to use the equipment before me, taught and trained well, but now wish to by my own regulator.

There are a few trusted brands I know of. my workmates tend to use a Tesuco dual guage. 6000kpa. I nearly just bought it for $360 of eBay.... but its lead me to ask more question

The others on eBay vary from 1000kpa, 4000kpa and the 6000kpa. Some have dual readings ( tank pressure + outlet pressure) and some have just the 1 guage.

For my line of work, where I am simply nitrogen pressure testing before releasing gas with A410 or R32, why what regulator should I use?

I would suggest the 4000kPa dual gauge model.

Test pressures are based on gas temperatures of 50 - 55°C, I look at R410a as a start point but check with which type of refrigerant you expect to work with.

Dual gauges, nothing worse than starting a test and having the bottle empty on you.

Great pointers there. thank you. I am only working with 410a and occasionally R32

I have just spent the last hour researching 410a + R32 temps. So many questions!!

Does the 6000kpa refer to the regulators secondary outlet pressure capability?
If that is the case (for examples sake) would a 1000kpa reg still do the job, but just take longer to pressurise the system. What is the corrolation?

Yes 6000 kPa is the outlet pressure.

A 1000kPa would only reach 1000 however long you left it.

Primary cylinder pressure is normally 15200 kPa so never connect the cylinder directly to anything other than a regulator.

Hi
Don't forget safety valves it is very important after regulator valve
Also in room your charging N2 it should be has safety out let and inlet air

Completely another method is deep vacuum and an electronic vacuum gauge.
Any small fall of vacuum indicates a leak.
Than you need N2 to locate it.
It's quicker, less dangerous, [no high N2 pressure], cheaper and if you do a good job and there are no leaks, less stuff to carry.

Another way of doing something we all take for granted.....:)