A dosing valve is provided for ejecting a liquid from a nozzle outlet channel. The dosing valve has a main body, a valve actuating element movable within the main body, and a valve closure element connected to or actuatable by the valve actuating element. The valve closure element is movable within a dosing chamber between an open position, in which it is lifted off from a nozzle sealing seat, and a closed position, in which it lies against the nozzle sealing seat. For the pneumatic activation of the dosing valve, a switching valve is provided by means of which a working chamber of the dosing valve can be selectively ventilated or charged with a pressurized fluid.

A two part airless adhesive spray system is provided herein. This system provides numerous enhancements to the prior art including limiting overspray fog, saving on sprayed material because of a more efficient spray pattern, and providing a stronger bond than that of the air-atomized spray guns of the prior art.

An applicator for dispensing liquid material onto a substrate includes a body, a valve module, and a backpressure control device having a device passage. The body includes an inlet passage, a dispensing outlet passage, and a recirculation outlet passage. The valve module has a dispensing mode and a recirculation mode, and directs the liquid material through the dispensing outlet passage in the dispensing mode and directs the liquid material through the recirculation outlet passage in the recirculation mode. The backpressure control device directs the liquid material through the device passage in the recirculation mode such that a backpressure of the liquid material in the recirculation mode is substantially equal to a backpressure of the liquid material in the dispensing mode. A method of adjusting a backpressure experienced by liquid material is also disclosed.

Device for applying a product, including a frame in which a product conduit is provided, the frame defining a longitudinal bore, the device including a needle mounted in the longitudinal bore, the device including a product application valve formed by a nozzle provided on the frame and a shutter provided at an end of the needle in the product conduit. The needle is configured to be moved along a longitudinal axis between a closed position and an open position of the dispensing valve. The device includes a stop fixed in relation to the needle, and a stop fixed in relation to the frame, configured to limit the return of the needle towards its closed position to an intermediate position between the closed and the open position, by interaction with the stop fixed in relation to the needle, and the stop fixed in relation to the frame has an adjustable position.

The disclosure relates to an applicator (RZ), in particular a rotary atomizer, for the application of a coating agent, in particular a two-component paint, comprising a first coating agent connection (SL) for feeding a first coating agent, in particular a basic resin of a two-component paint, a first coating agent strand (L1-L4), which extends in the applicator (RZ) from the first coating agent connection (SL) and carries the first coating agent, and a first valve (SLV1), which is arranged in the first coating agent strand (L1-L4) and controls the flow of the first coating agent, wherein the first valve (SLV1) can be controlled by a first control signal. It is proposed that a first pressure-relief valve (SLV1), which is actuated by its own medium, is arranged in the first coating agent strand (L1-L4) and, to avoid a problem being caused by excessive pressure, opens automatically when the pressure upstream of the first pressure-relief valve (SLV1) exceeds a certain maximum pressure.

The disclosure relates to a needle valve for controlling a fluid flow of a coating agent (H, SL) in a painting system, particularly for controlling a fluid flow of a two-component mixture consisting of two coating agent components (H, SL), particularly a two-component paint made from a master batch (SL) and a curing agent (H), comprising a valve seat (7) and a displaceable valve needle (7) with a needle stem and a valve head (5), wherein the valve head (5) closes the valve seat (7) in a closed position of the valve needle (7), while the valve head (5) opens the valve seat (7) in an opened position of the valve needle (7). The disclosure provides a flexible membrane (18) which surrounds the valve needle (7) annularly and in a sealing manner upstream before the needle head (5).

The disclosure relates to a coating agent valve (1) for controlling a flow of fluid of a coating agent mixture consisting of two coating agent components (H, SL), in particular a two-component paint consisting of a master batch (SL) and a hardener (H). The coating agent valve according to the disclosure (1) comprises a valve seat, a displaceable valve head (12), a valve drive (15) for displacing the valve head (12) and a displaceable valve needle (14, 20) which connects the valve drive (15) to the valve head (12) and moves the valve head (12) in correspondence with the valve drive (15). The disclosure provides for an automatic reduction in pressure in order to avoid excess-pressure damage upstream from the coating agent valve (1).

A spray bar assembly in a material working system of a ground-engaging machine, such as a rotary mixer, includes a spray bar coupled with an elongate carrier by way of a hinge connector. The elongate carrier is supported between guides mounted upon a housing of a rotor in the material working system, to guide the spray bar assembly for linear movement relative to a frame of the ground-engaging machine. The elongate carrier has openings that register with spray ports in a housing of the system, and the spray bar is tiltable to position spray nozzles within the openings and spray ports or withdraw the spray nozzles from the openings and spray ports.

An applicator for dispensing liquid material onto a substrate includes a body, a valve module body having a valve stem, and a backpressure control device provided in the and having a device passage. The body includes an inlet passage, a dispensing outlet passage, and a recirculation outlet passage. The valve module has a dispensing mode and a recirculation mode, and directs the liquid material through the dispensing outlet passage in the dispensing mode and directs the liquid material through the recirculation outlet passage in the recirculation mode. The valve stem is movable between an open position in the dispensing mode and a closed position in the recirculation mode. The backpressure control device directs the liquid material through the device passage in the recirculation mode such that a backpressure of the liquid material in the recirculation mode is substantially equal to a backpressure of the liquid material in the dispensing mode.

A spray gun having a body formed of a front end, a middle, and a rear end, a gas cap attached to the front end, and a needle that opens/closes a liquid nozzle attached to the middle. The front end has a through-hole extending from a front side, on which the gas cap is disposed, toward the middle. The middle includes a protrusion in the through-hole of the front end and a through-hole leading to a liquid supply port formed in the middle and extending from a front end side through the protrusion toward the rear end. The liquid nozzle is in the through-hole of the protrusion. The needle extends from a rear end side through the through-hole of the middle so that a distal end of the needle is in a distal opening of the liquid nozzle in an insertable/removable manner.