Will 2psig to 14 w.c. natural gas line regulator allow gas to flow when input pressure is 14 w.c. ?

[JamesFromAustin]

I'm asking because I need to have my line pressure increased to 2 psig because of new construction in back yard that is far away and has high nat gas load. The new structure will share the nat gas line with existing house which is currently running at normal gas pressure. I will need to increase nat gas pressure to 2 psig, so if I can install the regulator to existing house before the gas company increases pressure, that would be great. Otherwise I have a chicken and egg problem.

will a 2psig to 14 w.c. line regulator allow gas to flow when line pressure is only 14 w.c. ? I'm guessing line pressure is 14 w.c. I don't know, just using it as an example and will let plumber worry about those details.

thanks guys.

 

[Reach4]

Same answer as if you asked if a 1/4 inch pipe supplied with 60 psi from the street would pass water to your house: of course. But the pressure and flow rate will be reduced.

But what you really want to know is what the pressure drop will be at a given flow rate. In gas regulators, they use the term "droop" as one of the characteristics to describe how the pressure drops with more flow. So add "droop" to your searches.

Also know that 100 cuft of natural gas is about 100,000 BTU

In your earlier thread, Breplumb said

UPC has all the charts in appendix.
Pressure regulators can be sized to do what you need. We go to the regulator distributor, they engineer the regulator and order or fit up from their stock.

 

[Sponsor]

 

[Fitter30]

From 2 lb reg need to get to 7" Nat gas then the equipment reg will get to 3.5" at most burners

 

[Fitter30]

Same answer as if you asked if a 1/4 inch pipe supplied with 60 psi from the street would pass water to your house: of course. But the pressure and flow rate will be reduced.

But what you really want to know is what the pressure drop will be at a given flow rate. In gas regulators, they use the term "droop" as one of the characteristics to describe how the pressure drops with more flow. So add "droop" to your searches.

Also know that 100 cuft of natural gas is about 100,000 BTU

In your earlier thread

Delete

 

[JamesFromAustin]

Am I thinking about this wrong? I'm thinking something that is designed for 2psig inlet pressure is going to be so strong that if it sees a weak inlet pressure of 7 w.c. it will not allow anything thru?

When I look at the Maxitrol 325-L series, their chart input pressure only go from to 0.5 psi up to 2 psi, that sort of tells me it won't work the way I wished it would.

 

[Reach4]

Yes, wrong.

See https://www.maxitrol.com/325-l-line-pressure-regulators-2-psi/

 

[Fitter30]

What sizes a regulator is orfice size and the spring. This company has a branch in Austin and rep Maxitrol. All we need is a few pieces of information: line size, inlet pressure, outlet pressure, BTU load, natural gas or LP, indoor or outdoor, and the regulator’s application.

Gas Regulators - Oslin Nation Co.

Oslin Nation Co. is proud to be a gas regulator distributor for the areas of Austin, Dallas, Houston, and San Antonio, Texas.

onco-tx.com

512-806-7600

 

[JamesFromAustin]

Just following up on this. The answer is yes, A medium pressure nat gas regulator will allow low pressure thru. Spoke with my plumber today and he installed today.

 

[Fitter30]

Just following up on this. The answer is yes, A medium pressure nat gas regulator will allow low pressure thru. Spoke with my plumber today and he installed today.

With the spring that's in it and orfice might not give you what you wànt. Reg that is to big won't control. post 7