Eno oven making orange flames

[gwebster]

My Eno oven is 5 years old and for a couple of years one of the gas rings has been giving an orange flame more than a blue one. This makes the pans black and I imagine uses more gas.

I am in Dodecanese/Turkey area and thought it might be the local camping gas. I changed the small fitting, is it called a needle valve , from one hob to the other and the orange flames were slightly improved on the side which was worse, but are still present on both sides to some extent.

Any ideas are welcome.

If it is the needle valves where would I buy them, please?

 

[colvic987]

have you tried any of the following

cleaned the underneath of burner top to get rid of any rust particles.

tried a new regulator.

 

[DogWatch]

My Eno oven is 5 years old and for a couple of years one of the gas rings has been giving an orange flame more than a blue one. This makes the pans black and I imagine uses more gas.

I am in Dodecanese/Turkey area and thought it might be the local camping gas. I changed the small fitting, is it called a needle valve , from one hob to the other and the orange flames were slightly improved on the side which was worse, but are still present on both sides to some extent.

Any ideas are welcome.

If it is the needle valves where would I buy them, please?

Not remotely an expert, so I will be interested to hear diagnostics on this. But, from memories of school chemistry, blocking the air on a bunsen burner made the flame lose power and turn yellow, the same with a brazing tool. So alike the poster before me, I would start looking for rust etc. under the jets that maybe preventing a good flow of air to mix in with the gas.

I could be 100% wrong here so am not proffering an answer, merely thinking out loud and trying to learn a bit.

 

[bonny]

A yellow flame is caused because there is insufficient air being drawn in. Check near the jet, there should be an air opening just past the jet and the gas passing the opening causes air to be drawn in. There may be dust blocking the vent or a spiders web. The principle is exactly the same as "DogWatch" described with the bunsen burner. As for using more gas, unless the jet itself has been damaged, the gas flow will not have changed, although because you are not getting proper combustion the heat will be lower so your kettle would take longer to boil, so you will use more gas.

 

[colvic987]

the burner top is cast iron and generally rusts in time.

or the aluminium ring might be partially blocked.

 

[rob2]

The burner cap does not actually sit completely in contact with the stove top. There are slight protrusions to hold it about 1mm off, allowing secondary aeration. Unfortunately, cleaning will over time block this gap with grease. When completely blocked, the flame will be yellow and stand off (won't light right at the cap) and maybe won't light all round.

Unscrew the cap and clean underneath. Yes, there may be some rust, but the greasy film is more likely the culprit.

Certainly the Plastimo manual advises removal and cleaning on an annual basis - so the screw doesn't seize.

Rob.

 

[colvic987]

The burner cap does not actually sit completely in contact with the stove top. There are slight protrusions to hold it about 1mm off, allowing secondary aeration. Unfortunately, cleaning will over time block this gap with grease. When completely blocked, the flame will be yellow and stand off (won't light right at the cap) and maybe won't light all round.

Unscrew the cap and clean underneath. Yes, there may be some rust, but the greasy film is more likely the culprit.

Certainly the Plastimo manual advises removal and cleaning on an annual basis - so the screw doesn't seize.

Rob.

its an eno, no screws to hold it down, the fiddle clamp sits over the burners holding them down. but a grease film would be a definate culprit to his yellow flame

 

[daveyw]

As Dogwatch and Bonny have said-Lack of air. Clean the dust and dirt from the burner tube..

Blue flame - Good
Yellow flame - Bad - Lack of air
Orange Flame - Don't panic - dust and rust burning. Tap any cooker with a burner on and you will see the flame turn orange as the disturbed dust/rust burns

 

[gwebster]

have you tried any of the following

cleaned the underneath of burner top to get rid of any rust particles.

tried a new regulator.

Have cleaned everywhere but the regulator is old and will replace now, i have a spare with me. Thanks for the advice

 

[gwebster]

A yellow flame is caused because there is insufficient air being drawn in. Check near the jet, there should be an air opening just past the jet and the gas passing the opening causes air to be drawn in. There may be dust blocking the vent or a spiders web. The principle is exactly the same as "DogWatch" described with the bunsen burner. As for using more gas, unless the jet itself has been damaged, the gas flow will not have changed, although because you are not getting proper combustion the heat will be lower so your kettle would take longer to boil, so you will use more gas.

Thanks Bonny and everone who answered, i will get cleaning and looking for rust.

 

[gwebster]

As Dogwatch and Bonny have said-Lack of air. Clean the dust and dirt from the burner tube..

Blue flame - Good
Yellow flame - Bad - Lack of air
Orange Flame - Don't panic - dust and rust burning. Tap any cooker with a burner on and you will see the flame turn orange as the disturbed dust/rust burns

Which bit is the burner tube please?

 

[gwebster]

answer, maybe

I may have the answer , from a gas technician who knows eno ovens well, to the orange gas flame issue. There is no air vent. The air enters under the lower ring on the hob, made of aluminium. This distorts with heat and time and alters the air access. So must order a new one, he says.

Who would have thought of that?

 

[Juggler7823]

Eno spares

There has been several threads recently about this problem on Eno cookers. I (on advice from Skipper_stu) believe that your gas technician friend is correct. Can you ask your friend where spares can be obtained from. The UK agent, Alde?, won't answer the phone nowadays, possibly gone bust!

I may have the answer , from a gas technician who knows eno ovens well, to the orange gas flame issue. There is no air vent. The air enters under the lower ring on the hob, made of aluminium. This distorts with heat and time and alters the air access. So must order a new one, he says.

Who would have thought of that?

 

[colvic987]

I may have the answer , from a gas technician who knows eno ovens well, to the orange gas flame issue. There is no air vent. The air enters under the lower ring on the hob, made of aluminium. This distorts with heat and time and alters the air access. So must order a new one, he says.

Who would have thought of that?

why dont you file out the area again, so air can enter under the ring.

 

[Juggler7823]

Its a thin ally casting at the edge and is distorted more than the thickness. Filing would leave nothing left! Still looking for a UK spares supplier

 

[Juggler7823]

My Eno oven is 5 years old and for a couple of years one of the gas rings has been giving an orange flame more than a blue one. This makes the pans black and I imagine uses more gas.

I am in Dodecanese/Turkey area and thought it might be the local camping gas. I changed the small fitting, is it called a needle valve , from one hob to the other and the orange flames were slightly improved on the side which was worse, but are still present on both sides to some extent.

Any ideas are welcome.

If it is the needle valves where would I buy them, please?

Southampton Calor Gas centre, socal.co.uk are now the agents for ENO in the Uk. The models changed around 2006 so check the details given below. You need the semi rapid burner crown ring (£19) for the small burner and the rapid burner crown ring (£25) for the bigger burner. All in stock

 

[gwebster]

There has been several threads recently about this problem on Eno cookers. I (on advice from Skipper_stu) believe that your gas technician friend is correct. Can you ask your friend where spares can be obtained from. The UK agent, Alde?, won't answer the phone nowadays, possibly gone bust!

02380 788155 southampton calor gas only speak to peter Spedver ( not sure of last name). He really know these ovens.