A spray system for spraying a liquid, comprising: a liquid tank; a metering body having a fluid inlet connected to the liquid tank and a fluid outlet;Butterfly Valves a spray nozzle assembly connect to the fluid outlet for receipt of the liquid; a first gas passageway adapted for connection to a pressurized gas supply, the first gas passageway communicating with and through the spray nozzle wherein during operation pressurized gas is adapted to atomize the liquid delivered to the spray nozzle; Needle Valvesa valve between the fluid inlet and the fluid outlet providing a variable orifice adapted to adjust liquid flow rate; and a fixed orifice between the fluid inlet and the fluid outlet adapted to control flow rate at a low output of liquid delivery.GATE VALVES A needle valve assembly comprising: a valve body having an inlet and an outlet and a fluid passageway extending therebetween, a valve chamber arranged along a valve axis being interposed along the fluid passageway with an annular valve seat being arranged about the valve axis; a needle valve slidable in the valve chamber toward and away from the valve seat, the needle valve having a conical control surface wherein a variable orifice is formed between the conical control surface and the valve seat; and a fixed orifice formed through the needle valve, the fixed orifice connecting the inlet and the outlet in parallel fluid circuit with the variable orifice. According to one preferred embodiment, a spray system for various liquid applications includes a metering body connected to a liquid tank, a spray nozzle assembly, and a pressurized gas supply. In such system, a flow rate of liquid entering the metering body from the liquid tank is controlled by a valve assembly including a variable orifice and a fixed orifice. In an open variable orifice position, the liquid flow rate is controlled by a flow area of the variable orifice adjustable by a slidable needle valve, while a minimum liquid flow rate is maintained by a fixed orifice within the needle valve. In a closed variable orifice position, the liquid flow rate is controlled only by the size of the fixed orifice. The liquid regulated by the valve assembly is then transported into the spray nozzle assembly where the liquid is atomized by a gas stream from the pressurized gas supply forming a liquid spray. According to one embodiment of a needle valve assembly, the needle valve has a conical valve control surface and sits in a valve body which includes an inlet and an outlet and a fluid passageway extending therebetween. The needle valve is slidable in a valve chamber toward and away from an annular valve seat arranged about the valve axis wherein a variable orifice is formed between the conical control surface and the valve seat. The needle valve also includes a fixed orifice maintaining a minimum flow rate and connecting the inlet and the outlet of the valve body in a parallel fluid circuit with the variable orifice.

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