Abstract: Provided is a flow control valve including a valve body including a flow path, a first poppet fixed in the valve body including an inlet through which a fluid flows in, and an outflow hole through which the fluid flows out to the flow path of the valve body, a second poppet fixed in the valve body including an outlet through which the fluid flows out, and an inflow hole through which the fluid flows in from the flow path of the valve body, a sleeve to adjust an area of the outflow hole, a spool formed to slide along an external surface of the second poppet, and bellows of which one end is coupled with the first poppet and the other end is coupled with the spool.

Abstract: There is provided a mixture ratio stabilizer for a liquid propellant rocket engine which comprises: a body internally having a chamber and a fuel supply hole communicating with an end of the chamber to receive fuel from a fuel supply pump, an oxidizer inlet, and a fuel outlet; a spool guide in the chamber and including a plurality of first orifices for the fuel outlet and the fuel supply hole to communicate with each other; a bellows in the chamber and having one end adjacent to the spool guide and the other end positioned adjacent to the oxidizer inlet, to expand and contract in accordance with the pressure of an oxidizer which flows into the oxidizer inlet; and a spool having a part placed in the spool guide.

Abstract: There is provided a mixture ratio stabilizer for a liquid propellant rocket engine which comprises: a body internally having a chamber and a fuel supply hole communicating with an end of the chamber to receive fuel from a fuel supply pump, an oxidizer inlet, and a fuel outlet; a spool guide in the chamber and including a plurality of first orifices for the fuel outlet and the fuel supply hole to communicate with each other; a bellows in the chamber and having one end adjacent to the spool guide and the other end positioned adjacent to the oxidizer inlet, to expand and contract in accordance with the pressure of an oxidizer which flows into the oxidizer inlet; and a spool having a part placed in the spool guide.