Question about Imperial IFS40 Deep Fryer

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I need to know what the orifice size is for an IFS-40 imperial deep fryer. (Natural gas and porpane) someone put sodier and drilled them out and they are burning to yellow and it carboning up real bad.

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Without buying new burners, try adjusting the air so just the very tip of the flame starts to turn yellow or white.

Posted on Jul 21, 2009


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Imperial ifs40 fryer suiting up.

If you don't know that you are doing you should buy them. You need one for each burner, 3 or 4 for most models. Yes they can be drilled out going only one way, using lettered drill bits that are hard to find. The regulator on the back normally has to be adjusted also. If either is wrong, the flame will be to big or to small to heat correctly. At least buy one orifice and check the size hole, they are not expensive $5 -$10 if you do a little searching for a good price.

The Part Numbers are:
Orifice - NAT. Gas 1625-36
Orifice - L.P. Gas 1625-51

You MUST use Lettered drill bits for size, Like A-Z If it was drilled with any normal size bits 1/16 type bits it will NOT be correct! There should be a number stamped on the orifice, unless it was drilled out. Most people never mark the door that the gas type was changed, causes all types of problems for the service men.
Can you give more details to your problems? I couldn't find the hole sizes right off, but have seen it listed.

Apr 07, 2015 | Imperial IFS40 Deep Fryer

1 Answer

Pilot goes out after fryer reaches operating temp. Replaced milli-volt generator already.

sometimes the hole in the pilot tube gets dirty and needs cleaned in the old days the gas man had a tiny drill bit he reamed it with .

Mar 05, 2015 | Imperial IFS-40 - Gas Deep Fryer - 40 Lb -...

1 Answer

Can I tell just by looking at a deep fryer if it's nat gas or propane

It should be listed on the label unless it was changed at some point. The only way to tell is to use numbered drill bits to see what size hole is in each brass orfice of the burners, usually 3 to 5. The manual will list the orfice size for LP or NAT by the fryer BTU output. Most manuals can be found online, if you don't have a copy. This will require removing part of at least one burner to check the hole size. New orfices are normally about $20 each, most are marked on the side of the brass orfice. Note: some people drill out the holes to convert LP to NAT gas. Don't trust what is marked on the orfice, be sure to check with a drill bit. Small numbered bits can be hard to locate in most hardware stores. Found mine at Harbor Freight Tools.

Sep 23, 2014 | Imperial IFS-40 - Gas Deep Fryer - 40 Lb -...

1 Answer

Deep fryer catching on fire

From the video it appears many things could be wrong. The baffles and burner tubes could be clogged, the burner itself can be clogged, the flue is blocked, or this unit is using the wrong type of gas, ie: propane on a natural gas fryer.
Recommended steps for troubleshooting.
1. Verify proper gas type. Natural or Propane.
2. Check Burners, tubes, and baffles, clean all soot and debris from them.
3. Check for and remove any obstructions from the flue.

Apr 27, 2013 | Kitchen Appliances - Others

1 Answer

Yes have an imperial elite efp-40 and its natural gas but we are switching it to propane and they sent us a piece with no instruction and says goes in under the on off pilot know but when we took off there...

Due to differences between natural gas and propane, they require differing amounts of gas supplied to the burner. This is controlled by the size of the opening where the gas goes into the burner. The mechanism for control is called an "ORIFICE," which usually is made of brass, and looks like a short, fat bolt, with a tiny hole at the center of the bolt head. The difference between the orifices for each gas is accomplished simply by varying the size of that hole.
There is a conversion kit that you can buy at the hardware store. It is fairly simple to do.
Typically it involves switching out orifices, which look like a short bolt with a hole in the middle. Take out the old, put in the new.

Jul 23, 2011 | Imperial IFS40 Deep Fryer

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You will need a conversion kit from natural gas, most of this kit contains gas valve spring, burner and pilot orifice. Check the nearest authorized dealer in your area and ask buy the appropriate conversion for your fryer.

May 28, 2011 | Imperial IFS40 Deep Fryer

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Imperial ifs 40: gas comes out of jet and the burners work fine for a moment, then the flame ignites inside the burner and makes a worbling noise every now and then popping. is this low gas...

Check your manual and make sure your burner is configured for the gas that you are using. In most cases, there is an orifice that needs to be changed for using LP, or a screw setting that needs to be changed- most new appliances ship with a "city gas" configuration ( AKA NG - Natural Gas) and need to be configured for LPG (Liquified Propane Gas). The fitting(s) that need to be changed are tagged. This is due to the pressure difference between NG and LPG. Propane (LPG) runs at a higher pressure.
You state that your fryer is LPG. If you are running it on NG ("city gas") you need to consult your manual for converting it to NG. Outside of making sure that you are set up for the right gas, you should not have to make any other adjustments. For safety reasons, gas regulator pressure adjustments are for the most part no longer possible on gas appliances.

Mar 21, 2011 | Imperial IFS40 Deep Fryer

2 Answers

Late combustion on ifs 40 deep fryer. How do I fix this?

check if the unit receives standard gas pressure as rated on nameplate.

Mar 14, 2011 | Imperial IFS40 Deep Fryer

1 Answer

Imperial deep fryer model: IFS-40

Sounds like the pilot is dirty,if you have propane gas this is your issue,replace the pilot either way.

Aug 22, 2008 | Imperial Kitchen Appliances - Others

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