Natural gas filters

Mad Dog_2

You may even take it a step further and bounce that gas around with a few extra loop-te-loops. Shake that dirt right out. Mad Dog

<A HREF="http://www.heatinghelp.com/getListed.cfm?id=210&Step=30">To Learn More About This Professional, Click Here to Visit Their Ad in "Find A Professional"</A>

Mark Eatherton1

Does anyone know of such a beast?

I'm dealing with some old and evidently dirty gas mains on a project here in Denver. The strainer/screen assemblies on Munchkin gas valves is getting blocked with this crap and causing early (6 months) gas valve failure.

Can anyone recommend an in line gas filter for use with natural gas?

Thanks!

ME

To Learn More About This Professional, Click Here to Visit Their Ad in "Find A Professional"

Mike T., Swampeast MO

Web search revealed lots of filters for compressed natural gas applications (like in vehicles) and huge industrial filters for high-pressure (100s of pounds) systems but none for residential low-pressure.

The one "in-line" residential natural gas filter I saw (from a non-US website) was a wye strainer with what looked like quite fine stainless steel mesh.

bigugh_4

Drip leg?

remember the old drip leg. I wonder if you set one up that was a pipe size ot two larger than fuel line,to slow down the gas flow just before it enters the gas valve if that wouldn't do the trick Cheap and easy. The old gas line were charged with water to keep the caulked joints tight. and the drip leg helped dry and clean out the gas just before entering the Gas train, anyhow!

Mike T., Swampeast MO

One of My Goofy Ideas

Why not pipe in a short (1'?) section of large (2"?) horizontal black iron at the transition from old to new gas piping?

Velocity would make a nosedive and if the particles that could make it through cause a problem then I'd have to say:

1) particles aren't the problem

2) suspect gasseous contaminates

Greg Swob

NG filters

Mark- we use them on a lot of industrial, (mostly agricultural irrigation) applications, but they are readily available. Happy to send you one if you wish or I could look up supplier & cost information and get back to you. The units we use are typically 1" FPT inlet/outlet, about 8" or 9" long with a nut assembly for inspection or cleaning the screens. Let me know if you'd like a follow-up on this. Greg

ScottMP

Heres an old one

I found this on a old hot water heater.

Scott

To Learn More About This Professional, Click Here to Visit Their Ad in "Find A Professional"

curious_2

maxitrol

gerry gill

scott- wasn't there some

material like brass (steel) wool in that assembly also?

Mark Eatherton1

More information...

The gas main is 4" ID, and travels less than 30 feet from the meter to the loads. The loads consist of 1 each 2.5 million btuH boiler, and three 199,000 btuH boilers. I'm thinking it's not a drip leg issue, because the gas has to travel 10 vertical feet to get to the boilers, and there is a main drip leg in the line serving the mechanical room. I'm also thinking that the filter needs to be used with 11" WC gas pressures, and have a MINIMAL pressure drop on it.

I'm also thinking it's something like a VOC that's in the gas, and not something that's being kicked into suspension due to excesive velocities.

Thanks to all for their input so far, and I look forward to more posts.

ME

To Learn More About This Professional, Click Here to Visit Their Ad in "Find A Professional"

Glen

not for that application

If the piping is that corroded - replace it. Even if you in stall an approved and rated strainer - it will clog and interupt service. Plus it may not be approved under your gas code. Replacing the pipe - while a pain in the neck - may in the long run save you and your client $$$ and grief.

bigugh_4

looked at filters/natgas

and first one up was
http://www.king-filter.com/kingdec11pub_files/page0010.htm

St louis Mo. co. I'd bet they'd engineer your need!

ScottMP

absolutly

you got it right.

To Learn More About This Professional, Click Here to Visit Their Ad in "Find A Professional"

Unknown

Mark most gas utilities

will provide them for you if you request them.

Dale

Filters

Sounds like a utility problem, if it were my company we would install a strainer on our side ( as much to protect our regulator and meter ) then we would service that. We get oil sometimes and put in a drip on our main and a colacer near the customer. On your side maxitrol makes gas filters that are good quality. I'm sure there are other brands, I would also drip each run to each burner. As gas becomes more expensive other sources open up some of which may not be processed ( cleaned ) as well as some of the old transmission feeds.

Mark Eatherton1

It IS a utility problem...

and after speaking with one of their field supervisors, he agreed to come in and clean his mains, replace all the equipment (meter, reg etc) and install a filter that THEY will service on a regular basis. When asked if this was a probelm system wide, he said "No, only in that neighborhood. It's just dirt."

At least they fessed up. Now if I can get them to cover the cost of the 4 valves I've had to replace, along with my labor, I'll be a happy camper.

Thanks to everyone for their input!

ME

To Learn More About This Professional, Click Here to Visit Their Ad in "Find A Professional"

Noel Kelly

gas filter source

Mark - check out www.fiorentini.com ( they have a distributor in Texas I believe).

Noel Kelly

RadPro

Natural Gas Filter

Mark: We often see low pressure applications where we build an oversize filter to keep pressure drop down. Look at filterfabmfg.com or call me at 800-899-6927. Thanks, Ed