Abstract: A spray gun for spraying fluent materials having a high concentration of particulate matter. The spray gun is connected to a source of pressurized air and a source of spray materials. The air and spray materials mix in a nozzle, atomizing the fluid in the spray materials before the mixture is discharged from the spray gun. A valve is provided to control the flow of the spray materials. A conduit passes through the valve to provide a secondary source of air to atomize the fluid in the spray materials. The valve is also configured to ensure that no spray materials can enter the chamber of the valve when the valve is the closed position.

Abstract: A spray gun for spraying fluent materials comprising a valve chamber, a nozzle connected to the chamber at one end thereof, inlet and outlet ports communicating with the valve chamber, and a valve element having a hollow interior displaceable in the chamber between closed and open positions. The valve element is operable in the closed position to extend between the inlet and the outlet ports to allow flow of material through the inlet into the hollow interior of the valve element and out through the outlet. The valve element in the open position is operable to split the flow through the inlet into: a first partial flow through the hollow interior of the valve element and out of the hollow interior and the valve chamber through the outlet; and a second partial flow through the spray nozzle, whereby the flow through the outlet is uninterrupted when the inlet is receiving the material under pressure.

Abstract: A valve for dispensing liquids having a high content of particulate material through a spray gun operates between open and closed positions which ensures continuous recirculation of at least a portion of the spray material. The spray gun has an inlet nipple and an outlet nipple for the spray material and the valve has a valve element with a hollow interior providing a flow passage for continuous communication between the inlet and outlet nipples. In the open position only a part of the circulating liquid is discharged through the spray nozzle and in the closed position, all of the material is recirculated. The valve element has a forward position which in the open position apportions the flow of liquid between the interior of the nozzle and the interior of the valve element, and a closed position which blocks flow from the inlet nipple to the interior of the nozzle and directs all of the flow through the valve interior to the outlet nipple.