What is a "venturis" ?

Question

Goes from a gas grill control panel to the lighter casting. Is it supposed to be exposed to air because there is an inch gap?

Answer 1

Simply put, the venturi is the air/gas mixing tube between the orifice and the burner. The opening you see is the primary air opening, it allows air to the burner and is sometimes adjustable, depending on the manufacturer.

Answer 2

I believe that you are asking about that little "screen" that fits onto the gas valve of the gas grill.

What it does, is suck air into the orifice workings, so that the flames will be blue instead of yellow.

All things, need oxygen, propane, acetelyne, gas to produce a blue flame, which is hotter than a yellow flame. Yellow flame means its not getting fed with oxygen, and its not burning at its hottest peak. When its blue, its efficient, or even when its invisible, but, you wont find that on burners that are less than industrial.

It needs to be on there, if you have two burners, then each one, (just look on the bottom of the grill, where the burner from the inside, will have two hoses, or one hose coming into the "working unit", or the gas valve, and it will have a pipe going from the burner to the gas valve and on the end, there will be a small screen, that is oval like the pipe, and it fits on the valve).

I wish you well..

Jesse

Answer 3

short version:

A Venturi is designed to create high and low pressures - thereby mixing the fuel with air to combine an optimin fuel mix to burn.
Most common venturi's are the throats of carburetors - kind of shaped like an hour glass. As air is suck into the intake of the engine - it will creat a low pressure to draw out the gas.

On your BBQ Grill you adjust your choke - to get the maximum heat. Yellow flame = cold and Blue flame = hot

Answer 4

Seems like you and the first answerer never took Physics in school. It's the orifice or tube that narrows down to create low air pressure to suck in air with the propane. Works like a carburetor.