On Tue, 14 Nov 2017 00:52:49 +0630, Oumati Asami wrote:

On 14-Nov-17 12:17 AM, wrote:


I found the make but still need to find out the model number.



Home Depot's web site has a lot of them - after you click on the
product - there is a link to "specifications" that might help.
... graphs for flow characteristics; pressure ranges and limits, etc
Here's just one example ..

https://www.homedepot.com/catalog/pd...76134d9f7f.pdf

John T.

Thanks for the link.

I'm not sure how to read the flow rates chart. The legend says it's
based on a 50 psi differential. When the flow rate is zero, the fall off
is zero. So, there is no fall off. In this case, what's the pressure of
the system? Is it 50 psi lower than the input pressure (thus, the 50 psi
differential)?

By the way, what I'm interested in is the output pressure when no valve
is open. I just recall I have never mentioned this before.

Now that I'm thinking about this, I wonder how a pressure regulator can
regulate water pressure when no valve is open. A regulator can regulate
water pressure only when at least one valve is open. In such a case, the
regulator limits how much water flows out, thus, regulating the water
pressure. If no valve is open the pressure on both ends of the regulator
must be equal. Am I right?

You're wrong.