NATIONAL MACHINERY NA2000 User manual
INSTRUCTIONS FOR:
SPRAY GUN
Model: NA2000
Thank you for purchasing a National Machinery product. Manufactured to a high standard this product will, if used according to these
instructions and properly maintained, give you years of trouble free performance.
NA2000 - 1095 - (1) - 180400
1. SAFETY INSTRUCTIONS
IMPORTANT: PLEASE READ THESE INSTRUCTIONS CAREFULLY. NOTE THE SAFE OPERATIONAL REQUIREMENTS, WARNINGS AND CAUTIONS.
USE THIS PRODUCT CORRECTLY, WITH CARE AND FOR THE PURPOSE FOR WHICH IT IS INTENDED. FAILURE TO DO SO MAY CAUSE
DAMAGE AND/OR PERSONAL INJURY AND WILL INVALIDATE THE WARRANTY. PLEASE KEEP INSTRUCTIONS SAFE FOR FUTURE USE.
2. DESCRIPTION & SPECIFICATION
3Familiarise yourself with the application and limitations of this product, as well as the potential hazards.
pWARNING! Disconnect the spray gun from the air supply before changing accessories, servicing or performing any maintenance.
3Maintain the spray gun in good condition (use an authorised service agent).
3Replace or repair damaged parts. Use recommended parts only. Non-authorised parts may be dangerous and will invalidate the warranty.
3Keep the spray gun clean for best and safest performance.
3Ensure the air system is capable of supplying enough air for the spray guns air consumption.
3Wear approved safety respiratory protection, safety eye goggles and latex gloves to protect against the harmful effects of paint spray.
3Remove ill fitting clothing. Remove ties, watches, rings, and other loose jewellery, and tie back long hair.
3Locate the spray gun in an adequate working area, keep area clean and tidy and free from unrelated materials, and ensure there is
adequate ventilation and lighting.
3Keep children and unauthorised persons away from the working area.
3When not in use ensure the air supply is turned off.
3Avoid unintentional starting.
7DO NOT point spray gun at yourself, other persons or animals.
7DO NOT carry the by the hose, or yank the hose from the air supply.
7DO NOT use the spray gun for any purpose other than for which it is designed.
7DO NOT allow untrained persons to operate the spray gun.
7DO NOT operate the spray gun if any parts are missing or damaged as this may cause failure and/or personal injury.
7DO NOT direct air from the air hose at yourself or others.
3When not in use disconnect the spray gun from the air supply.
The NA2000 is a suction feed spray gun which has adjustable air, fluid and spread controls.
SPECIFICATION
NA2000 Suction Spray Gun
Air pressure, max. . . . . . . . . . . .116psi (8 bar)
Air consumption, max. . . .7cfm (200 litres/min)
3.1. Ensure the air valve is in the "off" position before connecting to the air supply.
3.2. You will require a minimum air pressure of 65psi/4.5 bar to operate the gun.
pWARNING! Ensure air supply is clean and does not exceed 116psi/8 bar. Too high an air pressure or unclean air will shorten
the life of the gun due to excessive wear and may be dangerous, possibly causing damage and/or personal injury.
3.3. Drain the air supply tank daily. Water in the air line will damage the gun and contaminate the paint.
3.4. Clean the air inlet filter screen weekly. For recommended
hook-up, see diagram to right.
3.5. Line pressure should be increased to compensate for
unusually long air hoses (over 8 metres). The minimum
hose diameter should be 10mm I.D. and fittings must
have the same inside dimensions.
3.6. Keep hose away from heat, oil and sharp edges.
Check hoses for wear, and make certain that all
connections are secure.
3.7. The input connection on the gun is 1/4 BSP.
3. AIR SUPPLY
HOOK UP
fig. 1
4. OPERATING INSTRUCTIONS
4.1. GENERAL
4.1.1. For best results, it is important to handle the gun correctly. It should be held perpendicular
to the surface being sprayed and moved parallel with it. Start the stroke before squeezing
the trigger and release the trigger before finishing the stroke. This will enable you to
accurately control the gun and material (fig. 2).
4.1.2. Spray from a distance of 200 to 250mm depending on fluid and air pressure (3 - 4.5 bar).
The material deposited should always be even and wet. Each stroke must overlap the preceding
stroke to obtain a uniform finish. To reduce over-spray and obtain maximum efficiency,
spray with the lowest possible air pressure.
4.1.3. Controlling the fan spray and the fluid
a) The amount of fluid and spread can be controlled by regulating the control screws (fig.1).
b) As the width of the spray is increased more material must be allowed to pass through
the gun to obtain the same coverage on the increased area.
c) The direction of the fan spray, either horizontal or vertical, is obtained by turning the air
nozzle to the desired position then tightening the retaining ring.
Disconnect from the air supply before attempting any maintenance or cleaning. When reassembling after maintenance, take care when
screwing parts together. Always hand assemble to avoid cross-threading, using tools only for the final tightening. If a part cannot easily be
turned by hand, check that you have the correct part or unscrew, realign and try again. DO NOT use excessive force when reassembling.
5.1. Spray gun
5.1.1. Immerse only the front end of the gun in solvent (fig. 3), until the solvent just covers the fluid connection.
5.1.2. Use a bristle brush and solvent to wash off accumulated paint.
5.1.3. Do not immerse the entire gun in solvent. This will cause packing to dissolve and dry out. Dirty solvent may also clog the narrow
passages in the gun.
5.1.4. Wipe the outside of the gun with a solvent dampened rag.
5.1.5. Lubricate the gun daily with a light machine oil. Be sure to lubricate the fluid needle packing, air valve
packing, side port control packing and trigger pivot point. Do not use lubricants containing silicone.
5.1.6. When finished spraying, flush the gun through with clean thinners.
5.2 Air nozzle, fluid nozzle and needle assembly
5.2.1. To clean the nozzles, soak in solvent to dissolve any dried material, then blow clean with air.
Handle all nozzles carefully and do not make any alterations in the gun.
5.2.2. If you need to probe the holes in the nozzles, be sure to use a tool that is softer than brass; do not use metal instruments.
5.2.3. Adjust the fluid needle valve so that when the gun is triggered, air flow occurs before fluid flow.
5. MAINTENANCE & CLEANING
fig. 3
NA2000 - 1095 - (1) - 180400
THE PROBLEM THE CAUSE THE SOLUTION
Fluid flow is too high for the
pressure and air flow.
Air pressure and air quantity too
high for paint flow
Air entering the fluid supply
One of the horn holes may be
blocked (A). In order to check it, turn
the air cap 180O, if the faulty pattern
is now upside down the hole must
be cleaned
Possible paint build-up between fluid
nozzle and air cap.
1. Increase air pressure by adjusting regulator and increase air
flow by air control.
2. Reduce paint flow with fluid control.
3. Paint may be too thick. If so, dilute it.
1. Reduce air pressure by adjusting regulator.
2. Reduce air flow by air control and increase paint flow with
fluid control.
1. Tighten the connection between the gun and the cup.
2. Tighten fluid nozzle with gun spanner.
3. Needle packing passing air - tighten packing screw or
replace O-ring.
3. Check whether paint pot is empty or air hole in lid is blocked.
1. Place the air cup in solvent.
2. Clean hole with compressed air or with a wooden toothpick.
DO NOT use a metal probe which will damage the hole.
1. Clean the air cap and the fluid nozzle, check also that they
match correctly.
2. Check needle for damage.
6. TROUBLESHOOTING
Poor atomization / heavy centre pattern
Heavy atomization poor centre pattern
Heavy right or left side pattern
Top heavy or bottom heavy pattern
Intermittent spray pattern
fig. 2
