3. AIR SUPPLY
Recommended supply system is shown below.
3.1.
Ensure that the spray gun trigger is in the "off" position before connecting to the air supply.
3.2.
You will require an air pressure between 30 and 40psi, and an air flow according to the specification.
p
WARNING!
Ensure that the air supply is clean and does not exceed 58psi while operating the spray gun.
Too high an air pressure and/or unclean air will shorten the product life, due to excessive wear, and
may cause damage and/or personal injury.
3.3.
Drain the air tank daily. Water in the air line will damage the spray gun and
invalidate your warranty.
3.4.
Clean compressor air inlet filter weekly.
3.5.
Line pressure should be increased to
compensate for unusually long air
hoses (over 8 metres).
The minimum hose diameter should be
1/4 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.
4. OPERATING INSTRUCTIONS
4.1.
For best results, handle the gun correctly. It should
be held perpendicular to the surface being sprayed
and moved parallel to it. Start the stroke before
squeezing the trigger and release the trigger before
finishing the stroke. This will give more accurate
control of the gun and the material (see right).
4.2.
Spray from a distance of 6 to 10 inches, depending
on the material and the atomizing pressure. 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 atomizing air pressure.
4.3.
Controlling the fluid and the fan spray:
a) As the width of the spray is altered so the fluid flow
must be adjusted to maintain the same coverage.
Use the fluid control screw (C in Section 6).
c) The direction of the fan spray, either horizontal
or vertical, is adjusted by turning the air nozzle
to the desired position and then tightening the
retaining ring.
Disconnect form the air supply before attempting any maintenance or cleaning. When reassembling after
maintenance, be sure to take care when screwing parts together. At first screw parts hand tight to avoid
cross-threading. 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 the
front end of the gun only
in solvent until the solvent
just covers the fluid connection.
5.1.2.
Use a bristle brush and solvent to wash off accumulated paint.
5. MAINTENANCE & CLEANING
5.1.3.
Do not immerse the entire gun in solvent. This will cause lubricants to dissolve and packing to
dry out. Dirty solvent may also clog the narrow passages in the gun.
5.1.4.
Wipe the outside of the gun with a dampened solvent 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 them in solvent to dissolve any dried material then blow them 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.
THE PROBLEM
THE CAUSE
THE SOLUTION
Fluid flow is too high for
the air pressure and flow
Air pressure and flow too
high for fluid flow
Air entering the fluid supply
Horn hole (A) blocked. In
order to check, turn the air
cap 180
O
, if the faulty pattern
is now upside down the
hole must be cleaned.
Possible paint build-up
between fluid nozzle and
air cap (A).
1. Increase air pressure by adjusting
regulator (A) and increase flow
adjusting regulator (B).
2. Reduce paint flow with regulator (C).
3. Paint may be too thick. If so, dilute it.
1. Reduce air pressure by adjusting
regulator (A).
2. Reduce air flow by adjusting regulator
(B) and increase fluid flow with
regulator (C).
1. Tighten the connection between the
gun and the cup.
2. Tighten fluid nozzle with gun spanner.
3. Check if cup vent hole is blocked.
4. Check if cup is empty.
1. Place the air cap 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 that they match.
2. Check needle for damage.
6. TROUBLESHOOTING
7. DECLARATION OF CONFORMITY
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
Signed by Mark Sweetman
For Jack Sealey Ltd. Sole importer into the UK of Sealey Power Products.
Declaration of Conformity
We, the sole importer into the UK, declare that the products listed here are in conformity with the following
standards and directives.
The construction files for these products are held by the
manufacturer and may be inspected, by a national authority,
upon request to Jack Sealey Ltd.
Spray Guns
Models HVLP-750.V2 & HVLP-751.V2
97/23/EC Pressure Equipment Directive
93/68/EEC CE Marking Directive
22nd October 2001
HVLP750.V2 & 751.V2 - 1 - 221001
