Adjustable PRV?

crozdog

Hi, Is the SD PRV adjustable? From memory it's factory set to release at about 10PSI/14.5mpa/1 bar on pressure.

I want to release at half that pressure.

richard

Don't know about the SD one, but with the newer generation variants you can reduce the blow off pressure by unscrewing the top

Smaug

Yep.

Can calibrate the cracking pressure with a pressure gauge in the line up.

Some of them have a lock nut / spanner so that the adjustment can be locked down after calibrated.

crozdog

Thanks Larry

DonMateo

I bought one of these that works well. We calibrated it to 1.15 bar the only bad thing is it isnt a vacuum valve.

richard

@DonMateo said: I bought one of these that works well. We calibrated it to 1.15 bar the only bad thing is it isnt a vacuum valve.

Hi. May I ask why you set it at 1.15 bar. I would have gone to about 0.65 bar gauge.

Smaug

This illustrates reasonably well:

https://www.youtube.com/watch?v=6OZZElPMdSI

punkin

Great Job Larry. Jeff's a natural.

Smaug

@punkin said: Great Job Larry. Jeff's a natural.

Naw. He sounds (and looks) like a gawd damned leprechaun.

Not that I'm racist or anything.

Also, bunch of gaffs. But gets the job done with respect to intended purposes.

Purpose? Oh! Well,,,,safety is sexy.

punkin

Well you sound all stuffy like someone's butler. You can tell him i said that too. :)

crozdog

Thasnk Larry - that's perfect