EFM 520....How long???

Re: EFM 520....How long???

PostBy: LsFarm On: Sun Dec 02, 2012 9:40 pm

I wonder if anyone tries using a good quality RTV sealant on the rubber gasket for the coil?

On my AA, I had some pretty significant rust under the rubber gasket, but I didn't want to to a cut=out and reweld,
so I sandblasted the pitted surface, and LIGHTLY buttered the steel and the matching gasket surface of the old gasket.
I had and still have no leaks..

I shut down my boiler every summer, and only once gave the nuts on the plate a 'tweak' with a wrench.

I think that the good quality RTV [I use Permatex 'Ultra-Black' ] creates a waterproof seal that is NOT dependant on the 'crush'
of the rubber gasket to keep water from migrating between the steel and gasket.

Ive got to believe that with a new, clean steel surface and a new soft rubber gasket, that a THIN coal of Ultra-Black would assure
a waterproof seal for decades.

Just a thought. I don't think any other type of sealant would do the job, they all get hard, except RTV.

Greg L
LsFarm
 
Stoker Coal Boiler: Axeman Anderson 260
Hand Fed Coal Boiler: Self-built 'Big Bertha' SS Boiler
Baseburners & Antiques: Keystone 11, Art Garland

Re: EFM 520....How long???

PostBy: MATTHEW D. On: Wed Nov 27, 2013 8:29 pm

I serviced a efm 520 today and noticed the DHWC was dripping a little. Not sure if I should replace the gasket. I need a second opinion. Should I replace it or let them get a few more years out of this one :gee: :?: What do you guys think??
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MATTHEW D.
 
Stove/Furnace Make: AXEMAN-ANDERSON & EFM
Stove/Furnace Model: 130 & 900 x 2

Re: EFM 520....How long???

PostBy: 009to090 On: Wed Nov 27, 2013 8:46 pm

Jeez, you have all the fun!

Run.... Run Fast, Run Far...
:out:

MATTHEW D. wrote:I serviced a efm 520 today and noticed the DHWC was dripping a little. Not sure if I should replace the gasket. I need a second opinion. Should I replace it or let them get a few more years out of this one :gee: :?: What do you guys think??
009to090
 
Stoker Coal Boiler: EFM 520 HighBoy
Hot Air Coal Stoker Stove: DVC-500 x 2
Coal Size/Type: Anthracite Rice

Visit Lehigh Anthracite

Re: EFM 520....How long???

PostBy: Wood'nCoal On: Wed Nov 27, 2013 11:23 pm

Nah, that should be good for a few more years. :shock:
Wood'nCoal
 
Stoker Coal Boiler: 1959 EFM 350
Hand Fed Coal Stove: Harman Magnafire Mark I
Coal Size/Type: Rice and Chestnut
Other Heating: Fisher Fireplace Insert

Re: EFM 520....How long???

PostBy: anthony7812 On: Thu Nov 28, 2013 7:50 am

You guys have it all wrong! Just put the cover back on and bamm problem is gone see! :hangover: Great work Matt, thats some impressive work. We dont have any stoker repair/service folks around here anymore. I have a friend who went to SUNY Delhi for an HVAC degree, I asked him did they go over stokers at all? Nope never, thats sad really.
anthony7812
 
Stoker Coal Boiler: VanWert VA 400
Hand Fed Coal Stove: Harman Mark III
Coal Size/Type: Buck/Nut/Anthracite

Re: EFM 520....How long???

PostBy: MATTHEW D. On: Thu Nov 28, 2013 8:21 am

Wood'nCoal wrote:Nah, that should be good for a few more years. :shock:

But I'm afraid it might start rusting the boiler if I don't replace it :lol: .....
MATTHEW D.
 
Stove/Furnace Make: AXEMAN-ANDERSON & EFM
Stove/Furnace Model: 130 & 900 x 2

Re: EFM 520....How long???

PostBy: titleist1 On: Thu Nov 28, 2013 9:32 am

as Clay Matthews would say....just put a fathead on it! :)
titleist1
 
Hot Air Coal Stoker Stove: Harman Mag Stoker (old style) one in basement, one in workshop
Hand Fed Coal Stove: Harman Mark III on standby for long power outages
Coal Size/Type: Rice/Anthracite; Nut/Anthracite

Re: EFM 520....How long???

PostBy: Dennis On: Thu Nov 28, 2013 12:24 pm

MATTHEW D. wrote:
Wood'nCoal wrote:Nah, that should be good for a few more years. :shock:

But I'm afraid it might start rusting the boiler if I don't replace it :lol: .....


between you and your welder,it will be just like new. :up:
Dennis
 
Hand Fed Coal Boiler: AHS/WOC55-multi-fuel/wood,oil,coal
Coal Size/Type: Anthracite/stove size

Re: EFM 520....How long???

PostBy: Scottscoaled On: Thu Nov 28, 2013 1:21 pm

LsFarm wrote:I wonder if anyone tries using a good quality RTV sealant on the rubber gasket for the coil?

On my AA, I had some pretty significant rust under the rubber gasket, but I didn't want to to a cut=out and reweld,
so I sandblasted the pitted surface, and LIGHTLY buttered the steel and the matching gasket surface of the old gasket.
I had and still have no leaks..

I shut down my boiler every summer, and only once gave the nuts on the plate a 'tweak' with a wrench.

I think that the good quality RTV [I use Permatex 'Ultra-Black' ] creates a waterproof seal that is NOT dependant on the 'crush'
of the rubber gasket to keep water from migrating between the steel and gasket.

Ive got to believe that with a new, clean steel surface and a new soft rubber gasket, that a THIN coal of Ultra-Black would assure
a waterproof seal for decades.

Just a thought. I don't think any other type of sealant would do the job, they all get hard, except RTV.

Greg L


I have used several new age sealants with pretty good results. There is a product at the auto parts stores called the "right stuff" that works real good if the surface is cleaned. That makes its own gasket. If I use a gasket, I coat both sides with the little tube of car t-stat rtv. Both ways have worked well.
Scottscoaled
 
Stoker Coal Boiler: EFM 520x4, 700. Van Wert 1200.
Hot Air Coal Stoker Furnace: EFM 150, Keystoker 150
Coal Size/Type: Lots of buck

Visit Lehigh Anthracite