Trigger-operated valve parts for liquid electrostatic spray guns
Order the correct valve and trigger-linked parts
“Trigger valve” can refer to different parts in a spray-gun repair order. Locate the fault and ordered item on the gun’s parts drawing: the trigger lever, air valve, fluid needle and seat, or the related seals and return spring. Record the complete gun reference before selecting a replacement.
Trigger-linked air valves, fluid shutoff needle/seat parts and associated mechanical linkage, springs and seals for hand-held liquid electrostatic spray guns. Powder-gun trigger electronics, standalone dispensing valves on page 3100, automatic-gun actuation systems and complete spray guns are outside this replacement-part scope.
CNFX editorial research · Sources checked October 19, 2026 · 3 sources
One trigger operates distinct air, fluid and electrical functions
Sames’ Nanogun+ Airspray manual DRT7105 H describes a sequence: air-valve opening, high-voltage engagement and then paint-needle opening. A magnetic sensor detects trigger position. The high-voltage switch can disable that function. This is a coordinated gun mechanism, not one interchangeable solenoid valve. [1]
Graco’s Pro Xp air-assisted manual diagnoses air leakage from the gun front separately from fluid leakage. It points to the air valve for the former, and to the fluid needle, seat or tip sealing for the latter. Identify the affected circuit before ordering parts. [2]
02
Gun version and trigger style determine the parts reference
The September 2026 Sames Nanogun+ Airspray brochure lists two-finger and four-finger trigger equipment versions. Supply the actual equipment number and trigger arrangement with the repair request. [3]
Graco’s 3A2495M parts table lists needle assembly 24N780 for its 60 kV guns and 24N781 for its 85 kV guns. It lists air valve 24N633 separately. Match the applicable model and series in the manual rather than selecting a needle by appearance. [2]
Sames’ current parts table likewise distinguishes the trigger, needle and air valve. Its air-valve drawing includes a magnet, and the manual ties that magnet’s arrangement to triggering. Obtain the complete ordered subassembly and the maker’s service checks. [1]
03
Lever, closing parts, springs and seals in the repair scope
Mark the supplied items on the exploded drawing and identify which mating parts remain in service. State the circuit served by each seal and spring.
Sames’ manual lists air-valve seals and a separate gun seal set. Graco also identifies an air-seal repair kit separately from the needle assembly. A kit name needs its contents checked against the intended repair. [1][2]
Part or feature
Detail for the replacement order
Trigger lever and linkage
Gun model, trigger style, pivot/fasteners and contact with the actuation mechanism.
Valve stem / fluid needle
Needle assembly reference and matched nozzle/seat arrangement; distinguish it from the air-valve shaft.
Valve seat
The fluid-closing surface or seat housing, with the corresponding needle and supplied seals.
Return spring
Identify the air-valve or fluid-needle spring and its location; specify the original reference.
Seals and O-rings
Individual reference or repair-kit contents, location, circuit and coating/cleaning compatibility.
04
Circuit-specific ratings and acceptance records
Use the original gun documentation to define the replacement’s fit and service conditions. Specify post-service air and fluid shutoff checks together with the required electrical and triggering checks for that gun.
Field
What the ordered part needs
Flow rate (L/min)
The coating, pressure and matched needle/nozzle arrangement; establish flow on the assembled gun.
Response time (s)
Define the measured event: trigger movement, air delivery, fluid opening or electrical signal, with the test conditions.
Leakage rate (mL/min, for liquid)
Test medium, pressure, closed-valve condition, measurement point and approved acceptance limit.
Operating temperature (°C)
Coating, cleaning and ambient exposure for the identified part.
Supply voltage (V DC, if applicable)
Identify the electrical device and connector. A mechanical trigger/needle assembly has no assumed solenoid supply.
Power consumption (W, if applicable)
The named sensor or actuator and its supply; keep it separate from whole-gun/control-unit data.
Ingress protection
The enclosure or electrical assembly to which the maker assigns the rating.
Body material
The actual air-valve or wetted housing, identified separately on the drawing.
Seal material
The exact supplied seal reference and compatibility with the coating and cleaning medium.
Port size
The named air/fluid connection or internal part interface, with its full designation.
Weight (kg)
Individual valve, needle kit or complete subassembly, with the included-parts list.
05
Attach the gun nameplate and marked parts drawing
Paste it into your enquiry below or into an email to a maker, then replace every bracket.
Gun: [maker; equipment number; model/series; liquid process; manual revision]
Fault/part: [air shutoff / fluid shutoff / linkage / triggering signal; observed condition]
References: [marked drawing; part and kit numbers; trigger style; included items]
Media: [coating; cleaning fluid; material data; operating conditions]
Interfaces: [needle/seat/nozzle; air valve; spring/seal locations; electrical connections if present]
Acceptance: [fit; circuit shutoff; required gun electrical/triggering checks; service record]
Supply: [exact subassembly; seals and wear parts; approved installation/service instructions]
Explore company information and manufacturing capabilities, then discuss the scope of your project with a relevant supplier.
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Compiled and source-reviewed by the CNFX editorial team.
Match the valve parts to the spray-gun model, seat and trigger mechanism, with wetted-material compatibility and the gun maker's assembly requirements confirmed. How we source and review
· Page last updated 18 October 2026
Buyer questions
Does the same trigger necessarily open air and paint simultaneously?
Check the gun’s sequence. Sames’ DRT7105 H describes air, high voltage and paint-needle events in sequence on Nanogun+ Airspray. [1]
Can the same fluid needle be assumed for every Pro Xp voltage version?
Use the applicable model table. Graco’s 3A2495M lists different needle assemblies for the 60 kV and 85 kV guns. [2]
Why include a photograph of the fitted trigger with the equipment number?
The Sames brochure lists equipment with different trigger styles, including two-finger and four-finger versions. The actual version helps identify the correct replacement scope. [3]
Sources and what still needs a direct check
Sources checked 2026-10-19. Graco and Sames manuals identify separate service parts in particular liquid electrostatic guns. Sames’ current brochure distinguishes equipment versions. The references do not establish cross-brand interchangeability or universal component ratings.
