If you plan to switch to PNG gas stove or move to a home with a PNG connection, you might be wondering if your current LPG gas stove will be compatible with it. Moreover, most gas stoves are designed for LPG, while your home might have a PNG connection.
An LPG gas stove isn’t directly compatible for use with PNG or vice versa. However, switching to PNG won’t require buying a new gas stove. You may convert a gas stove from LPG to PNG by making some adjustments.
Why Can’t Every Gas Stove Use Both LPG and PNG?
All gas stoves are designed for either LPG or PNG (mostly LPG) and are only compatible with the specified fuel. To use an LPG gas for PNG, you must convert it to make it compatible with PNG first.
This is simply due to differences in the properties of the two gasses and their corresponding stoves. PNG has a much lower calorific value than LPG, which means you need a larger amount of PNG to generate the same amount of heat. As a result, the nozzle in a PNG gas stove has a much wider diameter to facilitate adequate gas flow. A nozzle designed for LPG won’t deliver adequate PNG for a proper flame.
Moreover, LPG is also denser and heavier than PNG, which results in higher pressure. While gas stoves designed for LPG operate at about 2.75 kPa, PNG gas stoves operate at 1.1 kPa. Hence, piped natural gas doesn’t have enough pressure to work properly in an LPG gas stove. This is why converting an LPG gas stove to a PNG one involves adjusting the gas pressure.
How To Convert An LPG Gas Stove To A PNG Gas Stove?
You can convert your LPG gas stove to PNG yourself and save money. However, it is recommended to hire a technician to make the necessary adjustments to your LPG gas stove and make it PNG-compatible.
- A screwdriver
- Teflon tape
- A very small spanner
- A small wrench
Step 1: Dismantle The Gas Stove
Start by removing all the detachable parts of the LPG gas stove. These include burners, pan supports, spill trays, and O-rings. You may have to unscrew the burners and spill trays first if they’re screwed to the body of the appliance.
Step 2: Check And Detach The Components
Before you take out the burners, turn the gas stove upside down to check how the Bundy pipe is connected to the burner inlet pipes. You’ll have to reattach the burners exactly like that later once you’re done. For now, unscrew and loosen the Bundy pipes to detach them from the burner. If your gas stove has a glass top, be careful about the surface on which you place it upside down.
Step 3: Unscrew The Jet Nozzles
Now that you have removed the burners, you will notice small nozzles at the end of the Bundy pipes. Known as jets, these regulate the amount and pressure of the gas entering the mixing tube. Carefully detach the jets by unscrewing them from the Bundy pipes using the spanner. Please pay attention to the numbers and the corresponding positions of the jet and remember them for later.
Step 4: Replace Old Nozzles With LPG-Compatible Nozzles
This is the most important step in the conversion process. To make your gas stove PNG-compatible, you need a jet with a wider passage, or nozzle with a larger diameter. The boring on an LPG gas stove jet is rather tiny. You can either insert a thick needle or something similar to widen the boring or replace the component altogether with a CNG gas stove jet.
Step 5: Assemble The Gas Stove
Now the conversion is done; just reassemble the gas stove by putting all the detached parts back in their place. Don’t mix up the jets – make sure to put them back in their respective positions as per their numbering. Before you replace the jets, wrap some Teflon tape around the area that stays inside the Bundy pipe to prevent leakage.
Here are some further technical guidelines by Mahanagar Gas that will help you in PNG installation at your home, including gas meters, pipelines, ventilation, and spacing.
If you find the conversion process complicated, you may also buy a brand new PNG gas stove like Surya Flame Smart Gas Stove with 3 burners and ISO certification.
Can You Use Your PNG-converted Gas Stove For LPG?
No, after conversion to PNG, you can use your LPG gas stove with PNG only – it will no longer work with LPG. The wider boring in the jet will result in a dangerously strong flame that can pose a severe safety hazard. This is due to the high pressure and calorific value of LPG.
To use a PNG-converted gas stove for LPG, you need to dismantle your gas stove, replace the LPG nozzles with PNG nozzles, and reassemble the gas stove.
Now that you have learned how to convert an LPG gas stove for PNG, you no longer have to pay a technician for it. However, if you find it too complex or difficult, feel free to contact your gas distributor and request an LPG to PNG conversion. Either way, you can buy an LPG gas stove you really like and then convert it to PNG to suit your needs.