No, it is not safe to cook on an LPG gas stove if there is no fire or the flame has gone out due to low pressure or an empty cylinder while it is still connected to the regulator valve. Here's why:
Gas leakage: If the flame has gone out, but the gas is still flowing, there might be a leak in the gas supply system. This can lead to a buildup of gas in the kitchen, creating a potentially dangerous and flammable environment.
Explosion hazard: If the gas leaks and accumulates in a confined space, even a small spark or source of ignition can cause an explosion.
Carbon monoxide poisoning: Incomplete combustion of LPG gas can produce carbon monoxide, an odorless and colorless gas that is toxic and can be lethal in high concentrations. Without a flame, the gas won't burn efficiently, increasing the risk of carbon monoxide formation.
Fire hazard: If the gas is leaking and there's an open flame or any source of ignition nearby, it can lead to a fire or even an explosion.
If you notice that the flame has gone out on your gas stove, the first thing you should do is turn off the gas supply immediately at the cylinder's valve. Make sure the knobs on the stove are turned off as well. Avoid using the stove until you can safely determine the cause of the issue or get it checked by a qualified technician.
Remember, safety should always be a top priority when dealing with gas appliances. If you suspect a gas leak or encounter any issues with your LPG gas stove, it's best to seek professional help and refrain from using the stove until the problem is resolved.