Commercial Service Regulators - Principles of Operation

[@conqwiztadore2213]

Oh my god, amazing break down on how a pressure regulator works. My instructor was using a black an white 2d photocopy of a regulator to explain how a regulator works. Thank you for the video!

[@pq9254]

This was a great video!

[@rojoroax4111]

Valuable contribution, thank you very much!

[@ENGbOT-re9ox]

Question: How come for a 627 regulator (and others) if we reach the maximum inlet pressure than the trim size regulator can handle, how come the flow capacity at the max inlet pressure is way less than the flow capacity with an inlet pressure that's half the max inlet pressure? Example: Table 9 - Type 627 Capacities for NPS 2 body size and orifice size = 1/2 in - Outlet Press = 60 PSIG; Inlet pressure: 300 PSIG => Capacity = 79,000 SCFM. For the same regulator, same outlet pressure, if inlet pressure = 750 PSIG => Capacity = 32,000 SCFM. Thanks for your help!

[@pq9254]

The orifice will dictate that if the max pressure is not adequate. Instead of maxing out spring, you could up the orifice

[@pq9254]

Or maybe just the capacity of the reg can’t handle that increased inlet pressure. Maybe everything just needs to be increased. Reg head, diaphragm etc

[@LeighBowden-vz9kj]

@@pq9254 correct that you met pressure doesn’t matter the orifice can only plan so much gas pass

[@nathanielkerenweaver8987]

nice video. It seems like the downstream pressure is a function of atmospheric pressure and upstream pressure? if a high pressure weather system comes in wouldn't that result in too much downstream pressure? A spike in upstream pressure will have a similar effect right?

[@pq9254]

If the orifice is oversized, what kind of problems would I see?

[@ОООГАЗАВТОМАТ]

It’s interesting 👍 cool regulators👍

[@tonyjames1953]

Just a quick question: gas supply is on, but nothing is coming out for the pilot light. Any ideas why?

[@Camlo89]

Pilot light ? Your referring to a pilot on an appliance ?

[@leviatan61]

Hi Control Team, do you know how the vent chamber works? and how the vent pressure chamber can be calculated?

[@mehranghodosi3992]

When the pressure is very high....the vent works...and gas realise in air....and pressure below difragm is low

[@pq9254]

The vent has a set pressure based on the spring. If the reg started to fail, allowing higher pressure in, if the pressure reaches a certain level, the vent spring will give and high pressure will vent out keeping the inside of the building safe

[@지우개-g6l]

thank you

[@wetwingnut]

When the diaphragm fails (note I said "when" not "if") this regulator will fail open. Surely that can't be how real regulators fail. What am I missing?

[@spencer516]

The regulator will fail open and will relieve out of the atmospheric vent/ relief vent

[@MrAHSAN912]

fisher jeon regulator nh 150 please send diagram this regulator sensing

[@nathanielkerenweaver8987]

nice video. It seems like the downstream pressure is a function of atmospheric pressure and upstream pressure? if a high pressure weather system comes in wouldn't that result in too much downstream pressure? A spike in upstream pressure will have a similar effect right?

[@nathanielkerenweaver8987]

nice video. It seems like the downstream pressure is a function of atmospheric pressure and upstream pressure? if a high pressure weather system comes in wouldn't that result in too much downstream pressure? A spike in upstream pressure will have a similar effect right?

[@mehranghodosi3992]

I think in different (high pressure from sea)weather regulator works in low pressure

[@mehranghodosi3992]

Because regulator works in atmosphere pressure

[@Camlo89]

That’s where an internal relief valve comes in handy it reliefs that spike in pressure just in case to protect downstream pressure