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flued
A shell or flued boiler is an early and relatively simple form of boiler used to make steam, usually for the purpose of driving a steam engine. The design marked a transitional stage in boiler development, between the early haystack boilers and the later multi-tube fire-tube boilers. A flued boiler is characterized by a large cylindrical boiler shell forming a tank of water, traversed by one or more large flues containing the furnace. These boilers appeared around the start of the 19th century and some forms remain in service today. Although mostly used for static steam plants, some were used in early steam vehicles, railway locomotives and ships.
Flued boilers were developed in an attempt to raise steam pressures and improve engine efficiency. Early haystack designs of Watt's day were mechanically weak and often presented an unsupported flat surface to the fire. Boiler explosions, usually beginning with failure of this firebox plate, were common. It was known that an arched structure was stronger than a flat plate and so a large circular flue tube was placed inside the boiler shell. The fire itself was on an iron grating placed across this flue, with a shallow ashpan beneath to collect the non-combustible residue. This had the additional advantage of wrapping the heating surface closely around the furnace, but that was a secondary benefit.
Although considered as low-pressure (perhaps 25 psi (1.7 atm)) today, this was regarded as high pressure compared to its predecessors. This increase in pressure was a major factor in making locomotives (i.e. small self-moving vehicles) such as Trevithick's into a practical proposition.
Hello all.
Im in the process of planning to upgrade the boiler in the house, doing the job on my own.
Its currently an old radiator system & old open flued GloWorm Ultimate 40 CF housed in a fireplace fitted back in 1993.
(I presume at one point there would have been a back boiler in...
What rear flued combis are available now
Flexicom?
Do Baxis eco blue range offer the rear option, so to speak:omg_smile:
Is it on all the ecoblue range or just the advance, can't find much info
Or any others that are smallish (not intergas, no room)
Alright guys? Just a quick one.
If there is 2 open flued fires in the same room, totalling 13kw combined, but the room used to be 2 rooms eith the dividing wall now removed, does it now need a vent?
Or is adventitious air still applicable as it used to be 2 rooms?
Hi all, could anyone please help. I require an open flued boiler for training purposes, I know they are rarer than hens teeth, any help would be greatly appreciated.
Thanks
Hi, I wonder if I could get some advice. A friend of mine has a Keston boiler, approx 10yrs old, which after many faults over the years has finally given up the ghost! She lives in a mid-link property with the boiler fitted on an internal wall. The boiler has a twin 50mm flue system. To install...
Hi there,
I am about to sort out a service for my boiler. It is open flued, in a compartment, and the compartment is ventilated via ducts from the loft which go well above the insulation.
My question is - Although there is plenty of ventilation in the loft, it is from vents around the eaves of...
Hi there,
I am almost finished with my Gas Training Portfolio, however, I am struggling to tick off the Flue Flow and Spillage tests part of it. The Gas Engineer that I work with just doesn't get any work on Gas fires or Open Flued Appliances.
I was hoping that there was a kind Gas Engineer on...
hi guys , this might be a stupid question but here goes. My dear mom is about to be moved back home after a recent illness and she has now got a bed in what was the lounge. Now theres gas fire in this room and im not sure if there could be some kind of emergency shut off on the supply pipework...
I've just popped something in my halogen oven and stood at my kitchen window to have a cigarette, exactly 3 metres away, and noticed the heat shimmer from the morning sun (can see the shadows against my wall tiles) being pulled in through the open window. I then noticed the cigarette smoke...
it seems strange we eradicated the open flued water heater 20 years ago does anyone else feel its time for open flued boilers to follow them onto the scrap pile ? i think there are a decreasing number of installers who are realy competent to work on these now and it will get worse as some one...
do u guys fga open flu boilers and bbu's as standard or just if mi's say so, and in the absence of mi's where do u stick probe ??
many thanks in advance
are there any rear flue boilers out there ive got a sd620 to replace and a top flue will reguire a lot of cupboards removing cutting etc as at present a top flue would be through the eaves
Hi lads, jus doing my gas portfolio (not yet qualified) been servicing fires and BBU wit a mate but i've never serviced a flued convector. would you take the fire off the wall, or do you jus strip it down an clean the burner etc? no smoke bomb required i guess? smoke test once fire is back...
Hi everyone newbie here.
I am looking for some advice.
Have been asked to remove old Range Powermax 185:eek:(needs constant resetting and customer wants rid, not interested in fixing:D)
Want to fit megaflo and boiler instead.
Only problem is that i have to flue boiler 9mtrs to external...
highland
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Hi everyone newbie here.
I am looking for some advice.
Have been asked to remove old Range Powermax 185:eek:(needs constant resetting and customer wants rid, not interested in fixing:D)
Want to fit megaflo and boiler instead.
Only problem is that i have to flue boiler 9mtrs to external...
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