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A system, in certain embodiments, may include a spray coating device having a handle, a fluid head comprising a fluid valve and a trigger coupled to the fluid valve, and a quick disconnect fastener coupling the fluid head with the handle. A system, in other embodiments, may include a spray coating d

A system, in certain embodiments, may include a spray coating device having a handle, a fluid head comprising a fluid valve and a trigger coupled to the fluid valve, and a quick disconnect fastener coupling the fluid head with the handle. A system, in other embodiments, may include a spray coating device having a body, a pivot joint coupled to the body, and a trigger having a lever coupled to the pivot joint. The trigger may be configured to move in a first direction. The system also may include a valve disposed in the body and movable in a second direction crosswise to the first direction, wherein the lever is configured to bias the valve in the second direction.

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1. A system, comprising: a spray coating device, comprising: a handle comprising a first mounting interface;a fluid head, comprising: a fluid passage leading from a fluid inlet to a fluid outlet;a fluid valve disposed along the fluid passage;a pivot joint;a trigger coupled to the fluid valve and the

1. A system, comprising: a spray coating device, comprising: a handle comprising a first mounting interface;a fluid head, comprising: a fluid passage leading from a fluid inlet to a fluid outlet;a fluid valve disposed along the fluid passage;a pivot joint;a trigger coupled to the fluid valve and the pivot joint, wherein the pivot joint is coupled to an intermediate region of the trigger between first and second portions of the trigger, the first and second portions are rotatable about opposite radial sides of a rotational axis of the pivot joint, the first portion comprises a finger grip extending from a first radial side of the rotational axis of the pivot joint externally below the fluid head along the handle, and the second portion comprises a valve press lip extending from a second radial side of the rotational axis of the pivot joint externally above the fluid head over a top portion of the fluid valve to enable overhead actuation of the fluid valve, wherein the first radial side is opposite the second radial side; anda second mounting interface;a latch coupling the fluid head with the handle along the first and second mounting interfaces, wherein the latch is separate from the fluid valve, the latch comprises a hook or pin having a recess, and the latch comprises a cam or threaded fastener that mates with the recess. 2. The system of claim 1, wherein the handle does not include any fluid passages and fluid valves, wherein the handle and the fluid head comprise conduit connectors configured to route an external fluid conduit in front of the trigger from the handle to the fluid inlet of the fluid head, such that the external fluid conduit defines a trigger guard. 3. The system of claim 1, wherein the fluid valve is movable in a direction generally crosswise to a pull direction of the trigger in response to actuation by the trigger. 4. The system of claim 1, wherein the trigger comprises first and second lever portions disposed about an opening that fits about the fluid head, the first and second lever portions are coupled to respective first and second pivot portions of the pivot joint, and the trigger is not coupled to the handle. 5. The system of claim 1, comprising a fluid spray tip coupled to the fluid head, wherein the fluid spray tip is rotatable to unplug the fluid passage. 6. The system of claim 1, wherein the handle comprises a first guide disposed along the first mounting interface, the fluid head comprises a second guide disposed along the second mounting interface, the first and second guides are configured to mate with one another to align the fluid head with the handle along the first and second mounting interfaces, and the first and second guides are separate from the latch. 7. The system of claim 6, wherein the first guide comprises a threadless pin, the second guide comprises a receptacle, and the threadless pin is configured to slide into the receptacle. 8. The system of claim 1, wherein the latch comprises the cam that mates with the recess. 9. The system of claim 1, wherein the trigger is coupled only to the fluid head, and the trigger is configured to convert horizontal motion into vertical motion to actuate the fluid valve. 10. The system of claim 1, comprising: a lever coupled to the trigger;the valve press lip is coupled to the lever; anda valve button disposed over the fluid valve in the fluid head, wherein movement of the trigger in a first direction results in a rotation of the lever and external contact between the valve press lip and the valve button, wherein the external contact results in the valve moving in a second direction crosswise to the first direction, wherein the fluid valve extends completely through the fluid head. 11. The system of claim 1, wherein the fluid head is removably coupled to the handle via a quick disconnect feature that includes the latch and the handle excludes any fluid passages. 12. A system, comprising: a spray coating device, comprising: a spray device body;a pivot joint coupled to the spray device body;a trigger coupled to the pivot joint, wherein the trigger comprises a finger grip external to the spray device body and extending from a first radial side of an axis of rotation of the pivot joint, the trigger comprises a valve press lip external to the spray device body and extending from a second radial side of the axis of rotation, the first and second radial sides are disposed on opposite radial sides of the axis of rotation, and the finger grip is configured to move in a first direction to move the valve press lip; anda valve disposed in the spray device body and movable in a second direction crosswise to the first direction, wherein the valve comprises a valve button exposed external to the spray device body, the trigger is configured to bias the valve in the second direction via external contact between the valve press lip and the valve button, and the valve is configured to move in the second direction in response to actuation overhead by the valve press lip. 13. The system of claim 12, wherein the trigger comprises first and second lever portions disposed about an opening that fits about the spray device body, and the first and second lever portions are coupled to respective first and second pivot portions of the pivot joint. 14. The system of claim 12, comprising a fluid head removably coupled to a dummy handle via a quick disconnect feature, wherein the fluid head comprises the spray device body, the pivot joint, the trigger, and the valve, wherein the dummy handle excludes any fluid passages. 15. The system of claim 14, wherein the fluid head comprises a fluid delivery tip and a spray tip coupled to the fluid delivery tip, wherein the fluid delivery tip is made of ceramic, tungsten carbide, or a combination thereof, and the spray tip is rotatable to unplug the fluid delivery tip. 16. The system of claim 14, wherein the quick disconnect feature comprises a latch coupling the fluid head with the dummy handle, wherein the latch comprises a hook or pin having a recess, and the latch comprises a cam that mates with the recess. 17. The system of claim 14, wherein the quick disconnect feature comprises a latch coupling the fluid head with the dummy handle, wherein the latch comprises a hook or pin having a recess, the latch comprises a cam or threaded fastener that mates with the recess, the fluid head comprises a first guide, the dummy handle comprises a second guide, the first and second guides are configured to mate with one another to align the fluid head with the dummy handle, and the first and second guides are separate from the latch. 18. The system of claim 12, wherein the valve comprises a shaft extending between a ball and the valve button and a spring disposed about the shaft between the ball and the valve button, wherein the valve press lip is configured to move the valve button, the shaft, and the ball in the second direction against the spring in response to movement of the finger grip in the first direction, and wherein the spring is configured to bias the valve button, the shaft, and the ball in a third direction generally opposite from the second direction. 19. The system of claim 12, wherein the finger grip is disposed below the pivot joint externally below the spray device body, and the valve press lip is disposed above the pivot joint externally above the spray device body. 20. The system of claim 12, wherein the first and second directions are perpendicular to one another. 21. The system of claim 12, wherein the valve disposed in the spray device body extends completely through the spray device body in the second direction. 22. A system, comprising: a spray coating device, comprising: a handle;a spray head, comprising: a first passage extending in a first direction completely through the spray head from a first side to a second side of the spray head;a second passage extending through the spray head from the first passage to a liquid spray outlet, wherein the first and second passages are crosswise to one another;a liquid inlet disposed at a first end portion of the first passage on the first side of the spray head;a valve module disposed in the first passage, wherein the valve module comprises a valve button externally exposed at a second end portion of the first passage on the second side of the spray head, and the valve module comprises a movable valve element disposed in the first passage between the liquid inlet and the second passage;a lever coupled to a pivot joint on the spray head, wherein the lever comprises a trigger extending from a first radial side of a rotational axis of the pivot joint externally below the spray head and a valve press lip extending from a second radial side of the rotational axis of the pivot joint externally above the spray head, wherein the lever is configured to rotate in response to an engagement of the trigger to cause the valve press lip to bias the valve button in the first direction, and wherein the first radial side is opposite the second radial side. 23. The system of claim 22, wherein the lever comprises first and second lever portions disposed about an opening that fits about the spray head, the first and second lever portions are coupled to respective first and second pivot portions of the pivot joint, and the first and second lever portions both extend between the trigger and the valve press lip. 24. The system of claim 22, wherein the trigger externally protrudes away from the first side of the spray head, and the valve press lip externally extends along the second side of the spray head. 25. The system of claim 22, wherein the valve module comprises a spring disposed between the valve button and the movable valve element, and a shaft extending through the spring from the valve button to the movable valve element. 26. A system, comprising: a spray coating device, comprising: a handle comprising a first mounting interface;a fluid head, comprising: a fluid passage leading from a fluid inlet to a fluid outlet;a fluid valve disposed along the fluid passage;a pivot joint;a trigger coupled to the fluid valve and the pivot joint;a lever coupled to the trigger, the lever extending from a first radial side of a rotational axis of the pivot joint externally below the fluid head;a valve press lip coupled to the lever and extending from a second radial side of the rotational axis of the pivot joint externally above the fluid head, wherein the first radial side is opposite the second radial side;a valve button disposed over the fluid valve in the fluid head, wherein movement of the trigger in a first direction results in a rotation of the lever and external contact between the valve press lip and the valve button, wherein the external contact results in the fluid valve moving in a second direction crosswise to the first direction, wherein the fluid valve extends completely through the fluid head; anda second mounting interface; anda latch coupling the fluid head with the handle along the first and second mounting interfaces, wherein the latch is separate from the fluid valve, the latch comprises a hook or pin having a recess, and the latch comprises a cam or threaded fastener that mates with the recess.