Sigma Labs Inc (SASI)

[peafunke]

Oxidizer valve is used to mix two forms of fuel. Probably liquid oxygen and some other liquid fuel. ( or air and
Fuel). It usually looks like a Venturi that uses either a ball actuated or variable pneumatic valve to control flow of the liquid into the flow. The fuel will either be pressurized or get 'sucked ' into the Venturi created by the low pressure due to the in the Venturi. Think of a stream or tier that pinches. The flow increases at this location. With any fluid, this creates a low pressure. It also is a good place to 'mix' fuel. Which in this place is oxygen of some sort.

Hope that's not too wordy.