Boiler pressure relief

Post Reply
 
Dave 1234
Member
Posts: 788
Joined: Tue. Nov. 13, 2012 9:05 am
Stoker Coal Boiler: 1948 International boiler, EFM S-20 stoker
Coal Size/Type: Buck,

Post by Dave 1234 » Thu. Aug. 29, 2019 8:23 am

Anybody have good luck with industrial boiler relief valves ?

The cheessy valves that most use work,but they drip.

Any good ones out there? Or do they all leak some ?

Dave

 
lzaharis
Member
Posts: 2366
Joined: Sun. Mar. 25, 2007 8:41 pm
Location: Ithaca, New York
Stoker Coal Boiler: Keystoker KAA-4-1 dual fuel boiler
Hand Fed Coal Boiler: former switzer CWW100-sold
Coal Size/Type: rice
Other Heating: kerosene for dual fuel Keystoker/unused

Post by lzaharis » Thu. Aug. 29, 2019 9:05 am

The tested and approved relief valves are not supposed to leak. If yours is leaking it probably has some debris in it causing it to drip. If it was made in china-not Taiwan/Formosa that is another matter, as I can provide you with first hand experience with the Chinese made junk. If it does not stop dripping it needs to be sent to the scrapper as the plunger seal is probably damaged/deformed.

You can always buy a new relief valve and a spare from a Buderus boiler dealer.

 
User avatar
McGiever
Member
Posts: 10130
Joined: Sun. May. 02, 2010 11:26 pm
Location: Junction of PA-OH-WV
Stoker Coal Boiler: AXEMAN-ANDERSON 130 "1959"
Hand Fed Coal Boiler: BUCKET A DAY water heater
Hand Fed Coal Stove: Warm Morning 414A
Coal Size/Type: PEA,NUT,STOVE /ANTHRACITE
Other Heating: Ground Source Heat Pump and some Solar

Post by McGiever » Thu. Aug. 29, 2019 11:15 am

Never had a drip that was caused by anything but a rust particle that I caused to be wedged in the mating seal surfaces...it would flush away after a try or two by flipping the lever again.
My dripper was on a old bucket a day hot water heater I hastily plumbed in for "testing" purposes...for old boilers I like adding a wye-strainer to catch and collect moving particles...pumps don't like particles either and aren't cheap.

https://www.supplyhouse.com/Apollo-Valves-5900601 ... esh-Screen

Image

You're on your own as for correct size and price, just bringing food for thought. :)


 
User avatar
Rob R.
Site Moderator
Posts: 17980
Joined: Fri. Dec. 28, 2007 4:26 pm
Location: Chazy, NY
Stoker Coal Boiler: EFM 520
Hand Fed Coal Stove: Chubby Jr

Post by Rob R. » Fri. Aug. 30, 2019 3:45 pm

Dave, I have had good luck with Bell & Gossett relief valves.

Most relief valves leak from debris, or a failed/undersized expansion tank.

 
User avatar
Rob R.
Site Moderator
Posts: 17980
Joined: Fri. Dec. 28, 2007 4:26 pm
Location: Chazy, NY
Stoker Coal Boiler: EFM 520
Hand Fed Coal Stove: Chubby Jr

Post by Rob R. » Sat. Sep. 07, 2019 7:18 am

I installed mine with a Watts brand relief valve in 2011, and noticed that it was leaking a little once I shut the boiler down. I used B&G valves on my dad's and brother's EFMs, and those are still working great - so I decided to try and find one for my boiler. I managed to score a NOS unit on ebay for $45 and will be installing it before I fire the EFM up for another season.

Attachments

IMG_20190906_184519610_BURST001.jpg
.JPG | 257.5KB | IMG_20190906_184519610_BURST001.jpg

 
User avatar
coaledsweat
Site Moderator
Posts: 13763
Joined: Fri. Oct. 27, 2006 2:05 pm
Location: Guilford, Connecticut
Stoker Coal Boiler: Axeman Anderson 260M
Coal Size/Type: Pea

Post by coaledsweat » Sat. Sep. 07, 2019 8:12 am

McGiever wrote:
Thu. Aug. 29, 2019 11:15 am
Never had a drip that was caused by anything but a rust particle that I caused to be wedged in the mating seal surfaces...it would flush away after a try or two by flipping the lever again.
My dripper was on a old bucket a day hot water heater I hastily plumbed in for "testing" purposes...for old boilers I like adding a wye-strainer to catch and collect moving particles...pumps don't like particles either and aren't cheap.

https://www.supplyhouse.com/Apollo-Valves-5900601 ... esh-Screen

Image

You're on your own as for correct size and price, just bringing food for thought. :)
I thought the code says nothing between the boiler and PRV?


 
Dave 1234
Member
Posts: 788
Joined: Tue. Nov. 13, 2012 9:05 am
Stoker Coal Boiler: 1948 International boiler, EFM S-20 stoker
Coal Size/Type: Buck,

Post by Dave 1234 » Sat. Sep. 07, 2019 8:26 am

Rob R. wrote:
Fri. Aug. 30, 2019 3:45 pm
Dave, I have had good luck with Bell & Gossett relief valves.

Most relief valves leak from debris, or a failed/undersized expansion tank.
Good morning men,

Sorry for this delay, I went to Fla. for the storm.

Rob, I did the same "el'cheapo", valve on my boiler. Nice thing is, it's not to much trouble to swap out ...... Gotta do it .

Dave

 
User avatar
McGiever
Member
Posts: 10130
Joined: Sun. May. 02, 2010 11:26 pm
Location: Junction of PA-OH-WV
Stoker Coal Boiler: AXEMAN-ANDERSON 130 "1959"
Hand Fed Coal Boiler: BUCKET A DAY water heater
Hand Fed Coal Stove: Warm Morning 414A
Coal Size/Type: PEA,NUT,STOVE /ANTHRACITE
Other Heating: Ground Source Heat Pump and some Solar

Post by McGiever » Sat. Sep. 07, 2019 10:01 am

coaledsweat wrote:
Sat. Sep. 07, 2019 8:12 am
I thought the code says nothing between the boiler and PRV?
Not what I was saying but I can see where that could be misunderstood.

The wye strainer is a system strainer and has flow any time a pump runs.

 
User avatar
coaledsweat
Site Moderator
Posts: 13763
Joined: Fri. Oct. 27, 2006 2:05 pm
Location: Guilford, Connecticut
Stoker Coal Boiler: Axeman Anderson 260M
Coal Size/Type: Pea

Post by coaledsweat » Sat. Sep. 07, 2019 11:26 am

OK, that makes sense.

 
Dave 1234
Member
Posts: 788
Joined: Tue. Nov. 13, 2012 9:05 am
Stoker Coal Boiler: 1948 International boiler, EFM S-20 stoker
Coal Size/Type: Buck,

Post by Dave 1234 » Fri. Sep. 27, 2019 3:59 pm

Well today was the day..... Found a pair of NOS B&G 30 Lb. prv's on flebay for 50 bucks. The one installed on my boiler is holding nicely. The second one will go into my buddys new EFM 700 soon. I'll never use a cheesy el'cheepo again.

Dave

Post Reply

Return to “Stoker Coal Boilers Using Anthracite (Hydronic & Steam)”