AirVerter Gravity MicroFlex MFG-3100 User manual

2001 Smith Eastern Corporation 2020-11-13
MicroFlex
Smith Eastern Corporation
10630-S Riggs Hill Road •Jessup, Maryland 20794-9425 USA
301-497-7600 •800.937.HVLP (4857) •Fax [phone]
[email protected] •www.airverter.com
Compliance •Quality •Performance •Reliability
User’s
Manual
Gravity
MicroFlex
Model MF
G-3100
US Patents
4,850,809 •4,991,776 •5,217,564
5,044,557 •5,053,807 •5,393,345 •5,609,302
HVLP PAINT SPRAY SYSTEM

AirVerterGravity MicroFlex Spray Gun
DO NOT OPERATE SPRAY GUNS WITHOUT PERSONAL SAFETY EQUIPMENT

AirVerterGravity MicroFlex Spray Gun
DO NOT OPERATE SPRAY GUNS WITHOUT PERSONAL SAFETY EQUIPMENT
Please Read This Owner’s Manual BEFORE
Using Your MicroFlex Spray Gun
Who Should Use A MicroFlex?
The AirVerter®Gravity MicroFlexTM Spray Gun is a precision instrument. It requires meticulous
care and maintenance to achieve its outstanding results.
The MicroFlex uses "micro" fittings and tiny air and fluid passages to spray small amounts of
material. Consequently, the MicroFlex must be faithfully cleaned and maintained.
The MicroFlex requires extremely little fluid and air pressure and requires precise adjustment.
These adjustments, while not able to be adequately described in this manual, are second nature
to trained technicians.
WARRANTY
Smith Eastern Corporation warrants to the Purchaser that the AirVerter®Gravity MicroFlexTM MF-
3100 Spray Gun is free from defects in material or workmanship under normal use and service for
a period of twelve (12) months from the date of purchase.
Should any failure appear during this period, Smith Eastern shall, if given prompt written notice by
the Purchaser, correct such nonconformity by repair or replacement of the nonconforming part,
F.O.B. Smith Eastern’s repair facility. Repair parts are warranted for ninety (90) days from the date
of shipment, but repairs or replacements to original equipment shall not renew or extend the
warranty period of such equipment.
Equipment and parts furnished by Smith Eastern but manufactured by others shall be limited to
the warranty offered by the manufacturer thereof. Smith Eastern reserves the right to limit this
warranty in cases of misuse or abuse. Any modifications to spray guns or recommended
procedures will void the warranty.
The foregoing warranty is exclusive and in lieu of other warranties of quality or performance,
expressed, implied or statutory, including any warranties of merchantability or of fitness for a
particular purpose.
DO NOT OPERATE AIRVERTER

SPRAY GUNS WITHOUT USING PROPER
PERSONAL SAFETY EQUIPMENT INCLUDING RESPIRATOR, GOGGLES
AND SAFETY CLOTHING.
OBSERVE ALL PRECAUTIONS RELATED TO SPRAYING.
THIS EQUIPMENT IS OPERATED USING PRESSURIZED AIR. ALWAYS
DISCONNECT SPRAY GUN F
ROM AIR AND FLUID HOSES AND
DEPRESSURIZE SYSTEM PRIOR TO DISASSEMBLY OR MAINTENANCE.

AirVerterGravity MicroFlex Spray Gun
DO NOT OPERATE SPRAY GUNS WITHOUT PERSONAL SAFETY EQUIPMENT
EQUIPMENT REQUIREMENTS
1. Air Compressor that will hold a minimum of
20 PSI at the gun. Important: Position a
pressure gauge at the end of your air hose
next to the gun to be assured of the PSI
required to satisfactorily spray your coating.
2. High Pressure Air Hose:
a. Air hose lengths up to 50 feet MUST
have an I.D. of 3/8 inch.
b. Air hose lengths greater than 50 feet
MUST have an I.D. of 1/2 inch.
START-UP
1. Attach the air source to the base of the
MFG-3100 Spray Gun
.
BEFORE SPRAYING
1. Before you use your paint, make certain it is
properly mixed. This is particularly true of
multi-component paints. Use a paint shaker,
rotary mixer, or paint paddle to achieve a
homogeneous mixture. We recommend
splitting your paint into two parts; the top will
typically be lighter and the bottom will be
heavier. Completely stir the bottom half of
the paint and slowly add small amounts of
the top half into the heavier bottom.
2. Strain your paint to remove impurities. Use
a cone strainer, or a 100-mesh nylon bag or
equivalent strainer.
3. Thin your paint according to the
manufacturer’s specifications.
4. Needle packings (GG-024) are preset at the
factory and self adjusting. Replace packing
cartridge when necessary.
SPRAYING
1. Air pressure forces paint from the paint
container into the fluid chamber of the gun
and out through the nozzle where the flow of
air breaks the paint stream into tiny particles
(atomization), creating the spray.
a. Needle position controls the amount of
paint flowing through the fluid nozzle.
b. Trigger action controls needle position.
c. The Fluid Control Knob (GG-015) at the
rear of the spray gun controls trigger
action. Turning to the right will reduce
fluid flow; turning to the left increases flow.
2. Adjust the air until you have the desired
atomization. Too much air or fluid pressure
will cause the gun to spray improperly and
will create unnecessary overspray! You
need only a small amount of air as you are
atomizing only a small amount of paint.
3. Align the Flexible Extension (MF-008) to the
desired position.
4. If you are having problems with the
operation of your paint gun, check the
Trouble Shooting Guide at the end of the
manual for possible causes and solutions.

AirVerterGravity MicroFlex Spray Gun
DO NOT OPERATE SPRAY GUNS WITHOUT PERSONAL SAFETY EQUIPMENT
Vertical Fan Pattern
MF-202
Horizontal Fan Pattern
MF-202
Round Pattern
MF-203
CLEANING YOUR GRAVITY MICROFLEX SPRAY GUN
Spray gun performance is directly related to how well it is cleaned after each use.
This is particularly true for the small orifices in the MicroFlex.
WARNING!
Always de-pressurize system prior to any maintenance or disassembly procedure.
Disconnect all air and fluid hoses prior to performing any maintenance operation.
1. Run or pump solvent through the gun to
completely remove paint from the fluid
chamber. Flush passages thoroughly, as
brushes or other devices will not reach most
parts of the fluid chamber. Note: The Fluid
Hose provided is not designed for repeated
detachment and reattachment to the Hose
Barb or Spray Head. If flushing with solvent
cannot clear a clogged Fluid Hose, replace
the Fluid Hose.
2. Wipe the Handle and Needle (GG-014)
clean with solvent and a clean soft cloth.
Use caution to avoid damaging or bending
the needle. Re-lubricate the needle with
Vaseline.
3. Unscrew the Pattern Control Ring (GG-001)
from the Spray Head Assembly to separate
the Adapter Collar (MFG-002) from the
Spray Head Assembly exposing the Fluid
Hose (MF-010).
4. With the wrench provided, remove the
Needle Seat (MFG-3006) from the Spray
Head Assembly. Use caution to avoid
damaging or bending the Hose Barb (MF-
012). Be careful not to lose the Anti-Friction
Washers (MF-003).
5. Unscrew the Hose Barb from the Needle
Seat. Clean the Needle Seat with brush
provided.
6. Unscrew the MicroFlex Air Cap (MF-202 or
MF-203) and clean with solvent ensuring all
passages are absolutely clean.
7. Unscrew the MicroFlex Spray Head (MF-
200) from the Flexible Extension (MF-008).
8. Clean the MicroFlex Spray Head (MF-200)
with solvent ensuring all passages are clean
and free of obstructions. Use caution to
avoid damaging or bending the fluid nozzle
tip.
9. Use the round brush supplied to clean
Needle Packings (GG-024).
10. Inspect to make certain that all paint residue
has been removed from the fluid chambers
in the Spray Head Assembly.
11. Wipe all parts dry with a clean cloth before
reassembling.

AirVerterGravity MicroFlex Spray Gun
DO NOT OPERATE SPRAY GUNS WITHOUT PERSONAL SAFETY EQUIPMENT
Re-Assembly
1. Screw the Spray Head into the Flexible
Extension and attach the Air Cap to the
Spray Head.
2. Attach the Fluid Hose and Hose Barb to the
Needle Seat.
3. Remember to place the larger of the two
Anti-Friction Washers between the Spray
Head (xxx) and the Adapter Collar (MFG-
002)
4. Reattach the Needle Seat to the Spray
Head.
5. Replace the MicroFlex Adapter Collar, Rigid
Extension, Flexible Extension, Anti-Friction
Washers and Pattern Control Ring on the
Spray Head Assembly observing that the
Fluid Hose inside the Adapter Collar is not
kinked.
6. Carefully align the spray head and handle
and insert the needle into the Packing Nut.
7. Tighten the connector stud.

AirVerterGravity MicroFlex Spray Gun
DO NOT OPERATE SPRAY GUNS WITHOUT PERSONAL SAFETY EQUIPMENT
CLEANING ANCILLARY EQUIPMENT
1. Clean all paint residue from the pressure pot
or pump.
2. All fluid passages must be clean and free of
obstructions.
3. All gauges and valves must be clean and in
proper working order.
LUBRICATION INSTRUCTIONS
1. Use Vaseline or a non-silicone grease to
lubricate the gun.
2. Lubricate all threaded connections for ease
of maintenance.
3. Lubricate the needle where it passes
through the needle packing.
4. DO NOT allow lubricant to get into areas
where paint may come into contact with
lubricant.
MICROFLEX MAINTENANCE

AirVerter®Gravity MircoFlex Spray Gun Illustrated Parts Breakdown
9

MicroFlex Gravity Gun Parts List
Part #
NSN
Description
GG-002
4940-01-489-5402
Fluid Nozzle Body
GG-005
4940-01-490-1877
Nozzle Carrier
GG-006
3040-01-489-5406
Air Cap Adapter
Note 1
O-Ring
Note 1
O-Ring
Note 1
Seal
GG-010
5325-01-490-0901
Lock Nut
GG-011
4030-01-490-2068
Fluid Inlet Fitting
GG-012
4940-01-489-5399
Gun Body HVLP
GG-013
4940-01-489-6196
Fan Control Assembly
GG-014-xx
Fluid Needle
GG-015
5355-01-490-0853
Fluid Control Knob
Note 1
Spring Seat
Note 1
Needle Return Spring
GG-018
4940-01-490-2005
Rear Bushing
Note 1
Seal
GG-020
4820-01-489-1925
Air Valve Assembly
GG-021
4820-01-489-1921
Air Valve Poppet
Note 1
O-Ring
Note 1
Air Valve Spring
GG-024
4940-01-490-1897
Needle Seal Cartridge
GG-025
4940-01-489-6203
Trigger
GG-026
4940-01-490-1880
Air Control
GG-027
4730-01-490-1948
Air Inlet Fitting
GG-028
4940-01-490-1964
Trigger Pivot Set
Allen Plug
MF-008
4940-01-457-3754
Flexible Extension
MF-008A
Adjustable Hose Beads SIX BEAD LENGTH
MF-008B
1/4 inch Round Nozzle
MF-008C
1/8 NPT Connector
MF-008D
1/4 ID 90 Degree Nozzle
MF-008T
Flexible Extension Assembly Tool
MF-010
MicroFlex fluid tube 100 foot roll
MF-010-XX
Fluid Hose
MF-012
4940-01-467-7150
Hose Barb w/5 nylon washers
MFG-002
MicroFlex Adapter Collar for GG-100 Gravity Feed Gun
MF-200
4940-01-457-3954
Spray Head Body w/Integral Hose Barb - Fixed Pattern
MF-202
4940-01-457-3301
Air Cap - Fan Pattern

TROUBLESHOOTING
Trouble Probable Cause Remedy
Paint Will Not
Flow
1. Blockage in fluid nozzle
2. Loss of air pressure in cup
3. Loose fluid nozzle
4. Paint hose loose, damaged
or clogged
5. Coating is too thick
6. Loose Needle Packing
1. Clean or replace; strain paint
2. Search for air leaks and
check cup gasket
3. Tighten
4. Tighten, replace or clean;
strain paint
5. Thin the coating
6. Replace packing
Inconsistent
Spray Pattern
(Spits And
Sputters)
1. Running out of paint
2. Loose fluid tube
3. Loss of fluid pressure
4. Loose needle packing
5. Damaged air pressure tube
1. Fill cup or pot, but never to
the top (3/4 max.)
2. Tighten
3. Search for air leaks or
blockages
4. Replace packing
5. Air pressure tube requires
replacing or close inspection
Leakage at
Front of Gun
1. Damaged fluid needle
2. Dirty fluid nozzle
3. Impurities in paint
4. Loose fluid tube
5. Fluid adjustment screwed all
the way out
6. Needle not firmly seated in
the spray head
7. Packing too tight
1. Replace
2. Clean
3. Strain paint
4. Tighten
5. Rotate Fluid Control Knob
(DT-3012) on rear of gun
clockwise
6. Check for spray head
obstruction
7. Replace Packing
Distorted
Spray Pattern
1. Dirty or damaged spray head
2. Dirty or damaged fluid tube
or needle
3. Fluid tube partially clogged
1. Clean or replace
2. Clean or replace
3. Clean

AirVerter®Gravity MircoFlex Spray Gun Illustrated Parts Breakdown
12
Notes

AirVerter®Gravity MircoFlex Spray Gun Illustrated Parts Breakdown
13
Notes