Pressure Relief Valve Leaking

Stoker Coal Boilers automatically feed the coal and have controls and pumps just like any conventions boiler. They are intended to be used as a primary heat and often have domestic hot water coils as an added bonus. They can be set up independently or in dual sytem with your existing oil/gas boiler. They can accommodate both hot water base board or steam plumbing.
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Yanche
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Posts: 3032
Joined: Fri. Dec. 23, 2005 12:45 pm
Stoker Coal Boiler: Alternate Heating Systems S-130
Coal Size/Type: Anthracite Pea
Location: Sykesville, Maryland

Post Fri. Apr. 27, 2012 2:27 pm

For those of you looking to download code documents, many of the codes are available for free download here:

https://bulk.resource.org/codes.gov/

Most are one or more revisions out of date, but still quite useful since not much changes in a new release.

You will note many of the codes incorporate copyrighted documents, frequently some ICC or NFPA code. Take a look at an associated site:

https://public.resource.org/index.html

for a discussion about the legality of this resource. Basically when your state or city government makes a law that incorporates a copyrighted document as part of the that law, that specific law and referenced document becomes a public document, not subject to copyright.

You will find the same ICC code in many states laws. Some are simply image scans of the code book. More desirable are the true pdf file ones because they are searchable with a pdf reader. I can tell you the Maryland codes are searchable.
Yanche
Alternate Heating Systems S-130
Stoker Boiler burning Anthracite Pea Coal

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lsayre
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Posts: 12232
Joined: Wed. Nov. 23, 2005 9:17 pm
Stoker Coal Boiler: AHS S130 Coal Gun
Coal Size/Type: Blaschak Anthracite Pea
Other Heating: Resistance Boiler (13.5 KW)
Location: N/E Ohio, between Medina and Wadsworth

Post Fri. Apr. 27, 2012 3:02 pm

I've heard that each time a PRV opens it weakens it a bit. Is this generally true?

PS: I've heard the same for electrical breakers....
-Larry

Democracy rests upon the principle that collective wisdom arises from a pool of individual ignorance. A Republic rests squarely upon objective law, and fundamentally upon those laws which restrict the scope and actions of government.

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steamup
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Posts: 1209
Joined: Fri. Oct. 03, 2008 12:13 pm
Stoker Coal Boiler: Axeman-Anderson AA-130, Keystoker K-6
Hand Fed Coal Boiler: HS Tarm 502 Wood/Coal/Oil
Coal Size/Type: pea, buck, rice
Location: Napoli, NY

Post Fri. Apr. 27, 2012 9:10 pm

lsayre wrote:I've heard that each time a PRV opens it weakens it a bit. Is this generally true?

PS: I've heard the same for electrical breakers....
This is not true. Any safety device needs to be tested per manufacturer's recommendations. Some B&G relief valves I have purchased have a tag on them recommending a yearly opening via the lever. I assume this is to ensure that they do not stick closed as I have had valves do.

What you need to be concered about is that corrosion or sediment does not get under the seat.

Electrical breakers should be tested or flipped yearly also. Commercially, testing is available but it is not economical for residential size breakers.

However, using a circuit breaker as a switch will eventually weaken it if it is not rated for switching duty. For instance, a building where someone come in and turns on the lights with the circuit breaker would be a concern. Switching rated breakers are a must for this application. This is known as SWD rated.
Steamup

"You must learn from the mistakes of others. You can't possibly live long enough to make them all yourself."
Sam Levenson
"Make everything as simple as possible, but not simpler."
Albert Einstein

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lsayre
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Posts: 12232
Joined: Wed. Nov. 23, 2005 9:17 pm
Stoker Coal Boiler: AHS S130 Coal Gun
Coal Size/Type: Blaschak Anthracite Pea
Other Heating: Resistance Boiler (13.5 KW)
Location: N/E Ohio, between Medina and Wadsworth

Post Fri. Apr. 27, 2012 9:30 pm

steamup wrote:This is not true. Any safety device needs to be tested per manufacturer's recommendations. Some B&G relief valves I have purchased have a tag on them recommending a yearly opening via the lever. I assume this is to ensure that they do not stick closed as I have had valves do.

What you need to be concered about is that corrosion or sediment does not get under the seat.

Electrical breakers should be tested or flipped yearly also. Commercially, testing is available but it is not economical for residential size breakers.

However, using a circuit breaker as a switch will eventually weaken it if it is not rated for switching duty. For instance, a building where someone come in and turns on the lights with the circuit breaker would be a concern. Switching rated breakers are a must for this application. This is known as SWD rated.
Steamup, thanks for clarifying this for me.
-Larry

Democracy rests upon the principle that collective wisdom arises from a pool of individual ignorance. A Republic rests squarely upon objective law, and fundamentally upon those laws which restrict the scope and actions of government.

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Blackdiamonddoug
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Posts: 328
Joined: Wed. Jun. 11, 2008 8:52 am
Stove/Furnace Make: axemen 260 rebuilt by Matt
Stove/Furnace Model: stoker AA 260
Location: haverhill Ma

Post Fri. Nov. 09, 2012 3:06 pm

I like to install a flush valve in parell to the
Safety to get rid of the dirty water traped in front of safty
until it lifts

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