Pentech PSG1003 User manual

1
PENTECH, INC.
Operating Manual –Parts Manual
July, 2008
Issue 4
Plural Component
Impingement Mixing
Mechanical Purge Spray Gun
Palm Spray Gun
Pentech, Inc.
7256 21st Street East
Sarasota, FL 34243
Phone: [phone]
Fax: [phone]
www.pentech.us

2
Contents
CONTENTS and LIST of FIGURES 2
TECHNICAL DATA, PALM SPRAY GUN 3
OVERALL VIEW, PALM SPRAY GUN 4
PALM SPRAY GUN PACKAGE LIST 5
OPTIONAL ITEMS 5
SAFETY INFORMATION and WARNINGS 6
GENERAL OPERATION OVERVIEW 7
THEORY of OPERATION 8
PRESSURE BALANCE 9
IMPORTANT TIPS for OPERATION 9
METHOD OF ATTACHING PALM GUN COUPLING 10
BLOCK/WHIP HOSE TO HEATED HOSE ASSEMBLY 11
INITIAL GUN START-UP 12
NORMAL GUN START-UP 13
PALM GUN ROUND PATTERN MIX MODULE DETAILS 14
PALM GUN FLAT PATTERN MIX MODULE DETAILS 15
MODULE / PCD CHART 16
SPRAYING and NORMAL OPERATION 17
GUN SHUT DOWN and CLEANING 18
TROUBLESHOOTING 19
PARTS IDENTIFICATION SECTION 20
REPAIR and TOOL KIT LIST 21
HANDLE ASSEMBLY, EXPLODED VIEW 22
HANDLE ASSEMBLY, PARTS LIST 23
MODULE / PCD CHART 22
AIR CYLINDER ASSEMBLY, EXPLODED VIEW 24
AIR CYLINDER ASSEMBLY, PARTS LIST 25
COUPLING BLOCK / WHIP HOSE ASSEMBLY, EXPLODED VIEW 26
COUPLING BLOCK / WHIP HOSE ASSEMBLY, PARTS LIST 27
FLUSH TANK ASSEMBLY, EXPLODED VIEW 28
FLUSH TANK ASSEMBLY, PARTS LIST 29
PENTECH WARRANTY 30
PENTECH, INC. INFORMATION 30
List of Figures
PALM GUN OVERALL VIEW 4
ATTACHING PALM GUN WHIP HOSE ASSEMBLY TO HEATED HOSE 11
PALM GUN ROUND PATTERN MIX MODULE DETAILS 14
PALM GUN FLAT PATTERN MIX MODULE DETAILS 15
HANDLE, EXPLODED VIEW 22
AIR CYLINDER, EXPLODED VIEW 24
COUPLING BLOCK / WHIP HOSE, EXPLODED VIEW 26
FLUSH TANK, EXPLODED VIEW 28

3
Palm Spray Gun
Technical Details
Maximum Fluid Working Pressure 3500 psi
Minimum Air Inlet Pressure 100 psi
Maximum Air Inlet Pressure 130 psi
Minimum Material Output 1lb. / min.
Maximum Material Output 6 lbs. / min.
Maximum Fluid Temperature 200 F.
Air Inlet Size ¼” npt, Quick Disconnect Nipple
A Component (ISO) Inlet Size
B Component (POLY) Inlet Size
Dimensions: Height –6”
Width –2”
Length –3 ½”
Weight 1.74 lbs.
Wetted Parts Aluminum, Stainless Steel, Carbon
Steel, Teflon, Chemically Resistant
Plastic and O-Rings
Plural Component
Air Operated
Impingement Mixing
Mechanical Purge

4
Trigger Paddle
Air Cylinder Assembly
Air Cap
Material Shutoff Valves
Coupling Block
Whip Hose, Air
Whip Hose, Material
Filter / Swivel Assembly
Handle
Assembly
Trigger Guard
Check Valve
Air / Safety Valve
Palm Spray Gun
Overall View
Pattern Air Control Valve

5
The Palm Spray Gun Package
Includes
PSG1003 Palm Spray Gun Package
Includes:
PSG2100 Palm Gun Complete
PSG5300 Coupling Block / Whip Hose Assembly, 3 Ft.
PSG9000 Tool Kit
Includes: 1 PSG9009 Nut Driver, 5/16
1 PSG9010 Combination Wrench
1 PSG9011 Pin Vise, Small
1 PSG9015 Drill Index, #61-#80
1 PSG9012 Drill Bit, 7/64” x 6”
1 PSG9014 Drill Bit, .149
PSG100 Manual, Operating and Parts Identification
Note: Palm Gun Package comes ready to spray with:
PSG9001-13 (.013 Round Pattern Mix Module)
PSG9004-24 (.024 Round Pattern Pattern Control Disc)
Optional Items
PSG8000-A Flush Tank Assembly (Recommended)
PSG7017 Adapter Fitting Assembly, (To Graco Hoses)
PSG7016 Adapter Fitting Assembly, (To Glascraft Hoses)
BD6000 Adapter Block Assembly, (To Gusmer Style Coupling Block)
BD6100 Adapter Block Assembly, (To Graco Style Coupling Block)
BD6200 Adapter Block Assembly, (To Glascraft Style Coupling Block)

6
Safety Information & Warnings
Before operating the Palm Gun, personnel should fully understand the contents,
recommendations, and safety notes contained in this manual.
Failure to follow these guidelines may result in severe bodily injury or damage to
equipment and property.
The safety guidelines outlined in this manual are not intended to be all inclusive.
A certain degree of knowledge of general industrial safety practices as used in
the spray applied coatings and foam industry are required to insure operator
safety.
Aluminum Parts Hazard
Do not use 1,1,1–trichloroethane, methylene chloride, or other halogenated
hydrocarbon solvents, or fluids containing these solvents in the Palm Gun. These
solvents are capable of causing a serious chemical reaction, and possible
rupture when used in pressurized aluminum equipment.
Personal Protection
The operator and personnel in the vicinity of this equipment must ensure their
personal safety by wearing:
Protective eye wear
Protective clothing and gloves
Protective breathing apparatus, supplied fresh air system, or approved
respirator.
Injection Hazard:
This equipment operates at high fluid pressure and is capable of injecting
chemicals into skin.
Do not place hands or fingers in area of spray pattern.
Never point spray gun in the direction of other personnel.
Close material supply valves before leaving spray gun unattended.
Relieve all pressure before servicing or cleaning this equipment.
If chemicals have pierced skin, seek immediate medical attention.
Chemical Materials and Fumes:
Read and understand Material Safety Data Sheet (MSDS) provided by
chemical manufacturer.
Store and dispose of waste chemicals in accordance with manufacturers
guidelines.

7
GENERAL OPERATION OVERVIEW
Gun Safety Devices:
The Palm Gun has three methods of putting the gun in the safe mode.
# 1. Air Safety Valve:
The gun will not trigger without air pressure to the air cylinder.
To engage the air safety valve, turn handle counterclockwise to off
position. The air valve will vent air pressure contained in the gun handle
and air cylinder.
# 2. Material Shut off Valves:
The gun will not dispense material with the A & B manual valves closed.
To engage manual valve safety, turn manual valves clockwise until closed.
# 3. Emergency Shut Off Button:
Located at the rear of the air cylinder. If air pressure to the gun is lost, this
button can be pushed in to stop material flow through the gun.
Hose Orientation:
With gun pointing away from operator, A component hose and manual valve is
on operators left. B component hose and manual valve is on operator’s right.
Air Hose connection:
Insure that air safety valve is in the closed, / safe position.
Air hose is connected by inserting male quick disconnect fitting located at end of
whip hose into female quick disconnect air fitting located in heated hose bundle.
When gun is not in use, keep air fittings free of dirt and debris.
Coupling Block:
The A & B material hoses, air hose / coupling block are connected to the gun
handle by the coupling block bolt. Ensure that the sealing o-rings are in place for
the A & B material and air passage. Before attaching the coupling block to handle,
open the air valve to blow out any dirt or debris that may be in air line.
Material Shut Off Valves:
The A & B material shut off valves control the on/off flow of material to the gun.
Do not open a manual valve unless the gun is connected, or, the coupling block
material ports are directed into a suitable container.

8
Theory of Operation
Pushing Trigger:
When the gun is triggered, air is directed by the trigger spool valve to the air
cylinder. This moves the valving rod rearward from the PCD, past the A and B
ports. This allows material to flow through the A and B ports in the mix module.
As A and B material enters the center of the mix module, the two streams
impinge with each other at high pressure and velocity and start the mixing action.
They then travel forward and exit through the pattern control disc (PCD / Spray
Tip) and form the spray pattern.
Releasing Trigger:
When the trigger is released, the trigger spool valve directs air to the air cylinder
which push’s the valving rod forward. This closes the A and B ports in the mix
module, and push’s the remaining mixed material in the center of the module out
through the PCD. The valving rod stops its forward travel by contacting the rear
of the PCD. At this point, all mixed material is cleared from the mix module, PCD,
and the gun is ready to be triggered again.
Orientation of Mix Module Orifices
Round Pattern
The A and B orifices in the round pattern module are offset to each other. This
offset imparts rotation to the A & B material streams in the center of the module,
which along with the round orifice in the PCD, results in a round spray pattern.
See Page 14
Fan Pattern
The A & B orifices in the fan pattern module are in line with each other as no
rotation of the A & B material streams is required for the fan pattern PCD.
See Page 15

9
Pressure Balance
Due to the low output capabilities of the Palm Gun, it is important to properly size
the A and B material orifices in the mix module. The chart on page 16 can serve
as a guide.
Many conditions can affect the A & B pressure balance.
1. Material viscosity difference of A & B components.
2. Material temperature,
3. Spray pressure.
4. Filter cleanliness.
5. Mix module orifice size.
When starting up the Palm Gun, the A & B mix module orifices should be drilled
out to the same size.
When spraying, the A & B gauges will be indicating back pressure caused by any
restrictions, (A & B orifice size, filters, viscosity, etc.)
The gauges may, or may not read exactly equal. This is normal.
Providing the proportioner is being supplied with an adequate amount of material,
free of air bubbles, the ratio of A to B will be correct.
A pressure difference at the gauges does not mean the gun is spraying off
ratio.
Depending on the conditions listed above, a pressure difference between the A &
B pressure gauges may be seen. Gauge readings of 500 -700 psi pressure
difference will still yield a good mix. Always test spray material to check for
proper mixing action and cure.
If further balancing of the pressures is desired, the orifice corresponding to the
higher reading gauge may be very carefully enlarged with the next larger size
drill bit. The module ports can also be enlarged equally to account for uneven
orifice wear.

10
Important Tips for Operation
Air cap and mating front face of gun must be very clean and free of nicks to
insure a good seal. No gasket is used here.
Air cap bolts must be tightened with a wrench until tight.
Consult your material supplier for the proper cleaning and flushing solvent to use.
Ensure that cleaning solvents do not cause swelling of o-rings.
Do not soak o-rings or mix module in solvent. Solvent may be used for cleaning,
and then dried off.
Air flow to air cap should remain on whenever material shut off valves are open.
Misting in air pattern indicates a leak at the module seat area. Tighten air cap
bolts snugly.
Do not submerge the entire gun in cleaning solvent as damage to the trigger
spool valve o-rings will result.
Lubricate air line inlet daily, 2-3 drops of air tool oil only.
Apply a light coat of wax or grease to exterior of gun daily to prevent overspray
build up.
Use only the proper sized drills for sizing module ports, or cleaning the PCD
orifice.
Attaching the Palm Gun To
The Heated Hose Assembly
Determine whether the Palm Gun whip hoses will be connected directly to the
standard 10 Ft. heated whip hose assembly with adapter fittings, or if an adapter
block will be used.
See pages 10 & 11
The use of the adapter block permits the Palm Gun and whip hose assembly to
be removed quickly from a standard coupling block. This feature allows the
applicator to switch between different types of guns, depending on the jobs
requirements. The palm gun and its coupling block / whip hose assembly can be
removed, set aside, and remain totally sealed until its next use.

11

12
Initial Gun Start Up
Install Coupling Block / Whip Hose Assembly to Heated Hose Set:
1. Attach Coupling Block / Whip Hose Assembly to existing heated hose
bundle using either adapter fittings, or adapter blocks. See page 9.
Check to see that A & B material shut off valves are closed.
2. Turn on hose heat and machine heaters. Set temperature, and allow
machine to reach spray temperature.
3. Pressurize equipment, bleed air from coupling block / whip hose
assembly into suitable waste container. Equalize A & B component
pressure gauges at correct spray pressure.
Assemble Palm Spray Gun:
1. Remove air cap, PCD, and mix module. Check ports in mix module
with proper size drill bit. See page 5 and 14. Replace mix module
being careful to align pin in slot around module seat. Replace PCD,
and air cap. Tighten bolts securely with wrench.
2. Check to see that basket filters are in place. Check to see that A & B
material, and air o-rings are in place.
3. Apply a light coat of grease or wax to gun to prevent overspray from
sticking.
4. Plug in air supply whip hose. Briefly open air safety valve to ensure air
line is free of debris.
5. Attach gun to coupling block using 5/16” nut driver.
6. Open air / safety valve at bottom of gun.
7. Open pattern air valve ¼ to ½ turn.
8. Slowly open A & B material shut off valves 1 ½ turns. Check for
material mist in pattern or material leakage at air cap.
Gun is now ready to spray.
Aim off target, spray off target until good pattern develops.

13
Normal Gun Start Up
Assemble Palm Gun:
1. With air cap, PCD, and mix module removed, use flush tank or solvent
squeeze bottle to insure that basket filter ports and ports to mix module
seat are clean and open. A drill of the proper diameter can be used to
clear build-up that may be present.
2. Check ports in mix module to ensure they are clean and properly sized.
See page 14 for details on drilling the mix module.
3. Apply a very light coating of lithium grease to the module seat and
exterior of the mix module.
4. Push small end of module over the end of the valving rod. Carefully
align module locating pin with grove in module seat ring. Push module
fully into seat area. Re-check alignment of locating pin in slot.
5. Check to see that the orifice in the PCD is clean. Orifice may be
carefully cleaned with proper drill size. See page 14. Apply a light coat
of grease to PCD. Put PCD into place over large end of mix module.
6. Line up slot in rear of air cap with air port in mating gun face. Apply a
light coat of grease to bolts and tighten until very snug with wrench.
Apply light coat of grease to air cap to prevent overspray build-up.
7. Plug in air supply whip hose, open air / safety valve at bottom of gun.
8. Open pattern air valve ¼ to ½ turn. Trigger gun to check for proper
operation.
9. Slowly open A & B material shut off valves 1 ½ turns. Check for mist in
pattern, or leakage around air cap.
10. Check for leakage at rear seal packing nut. Nut should be only tight
enough to prevent leakage. Do not over tighten.
Gun is now ready to spray.
Aim off target, spray off target until a good pattern develops.

14

15

16
Module / PCD Chart
PART APPROX. OUTPUT
ITEM # NUMBER DESCRIPTION PATTERN AT 24" DRILL # DRILL SIZE
8 PSG9001-13 Module, Mix, Round Pattern 1.25 - 2 Lbs./Min. 80 .0135
9 PSG9003-20 PCD, Round Pattern, .020 4" - 6" 76 .020
8 PSG9001-13 Module, Mix, Round Pattern 1.5 - 2.5 Lbs./Min. 80 .0135
9 PSG9004-24 PCD, Round Pattern, .024 6" - 10" 73 .024
8See Note Below Module, Mix, Round Pattern 2.5 - 4 Lbs./Min. 76 .020
9 PSG9020-28 PCD, Round Pattern, .028 8" - 12" 70 .028
8See Note Below Module, Mix, Round Pattern 4 - 6 Lbs./Min. 70 .028
9 PSG9021-36 PCD, Round Pattern, .036 10" - 12" 64 .036
ROUND SPRAY PATTERN
CLEAN OUT DRILL
Note:
Module is Part # PSG9001-13 Drilled by customer to size shown.
PART APPROX. OUTPUT
ITEM # NUMBER DESCRIPTION PATTERN AT 24" DRILL # DRILL SIZE
8 PSG9002-13 Module, Mix, Fan Pattern 1.25 - 2 Lbs./Min. 80 0.0135
9 PSG9005 PCD, Fan Pattern, 6" - 7"
9 PSG9006 PCD, Fan Pattern, 7" - 8"
FAN SPRAY PATTERN
Do Not Drill
Do Not Drill
CLEAN OUT DRILL
Flow rates and pattern width is approximate, and will
vary depending on material viscosity, temperature, and pressure.

17
Spraying and Normal Operation
Note: The Palm Gun comes standard with 3 ft. unheated whip hoses. Their
purpose is to limit operator fatigue by providing more flexibility, as well as saving
the wear and tear on the more expensive heated whip hose assembly.
Due to the small amount of unheated material in the whip hoses, it may take a
moment for the heated material to reach the gun and the spray pattern to fully
develop. Subsequent triggering will yield a good pattern instantly.
Start by spraying off target to check spray pattern.
Position the spray gun perpendicular to work surface whenever possible.
Overlap passes of the round pattern by approximately 1/3 for even application of
coatings and foam.
Due to the direct impingement mixing of the Palm Gun, it may be triggered while
aiming at the project surface without producing an ISO spit, or off ratio material.

18
Gun Shutdown and Cleaning
Removing Palm Gun from Coupling Block:
1. Close A & B material shut off valves on coupling block.
2. With pattern air still on, trigger gun repeatedly to relieve pressure in
material ports.
3. Turn off pattern air valve.
4. Close air safety valve on coupling block.
5. Remove gun from coupling block.
Flushing Gun:
1. Fill flush tank approximately ½ full with suitable gun cleaning solvent.
2. Attach gun to flush block on flush tank. Check to see that A & B
material o-rings, and air port o-ring is in place.
3. Insure that A & B flush valves on flush block are closed. Attach air
supply hose to flush tank to pressurize. Leave air supply hose
connected.
4. Attach air whip hose from gun to quick disconnect on tank.
5. Open air/safety valve to provide air to gun.
6. Open A flush valve and trigger gun into suitable waste container until
solvent comes out of PCD. Close A flush valve.
7. Open B flush valve and trigger gun into suitable waste container until
solvent comes out of PCD. Close B flush valve.
8. Trigger gun repeatedly to relieve pressure in material ports.
9. Remove two air cap bolts and air cap. Place in small container of
cleaning solvent.
10. Remove PCD. Trigger gun to remove mix module. Clean ports in mix
module with the proper drill size and solvent. Blow off and store dry to
prevent swelling in solvent.
11. Repeat steps 6 and 7 above. This step flushes gun without the
restriction caused by the small ports in the module. Allow enough
solvent flow thru ports to thoroughly flush ports and basket filters.
12. Disconnect gun from flush block and remove o-rings. Store o-rings dry.
Remove basket filters. Check for debris in basket filters. Basket filters
may be stored in cleaning solvent.
13. Disconnect flush tank air supply.
Note: Once familiar with gun operation and cleaning, gun may be left attached to
flush tank until next use.
To clean overspray from gun, a rag that has been soaked in suitable solvent may
be wrapped around gun for 15 –20 minutes to soften overspray.
Do not submerge gun in solvent as o-rings in air cylinder and trigger valve
may be damaged.

19
Troubleshooting
PROBLEM CAUSE SOLUTION
Veryslight air leakage at sides of air cap This is normal No action required
Valving rod does not acuate No air pressure Connect air supply, open valve
Low air pressure Set air pressure to 100-130 psi
Rear seal packing nut too tight Loosen packing nut
Mist from PCD when not triggered Air cap bolts loose Tighten air cap bolts with wrench
Air cap gun face surface dirty Clean surfaces, check for nicks
Module bore worn out Replace module
Excessive overspray Excessive air flow to air cap Reduce air flow with needle valve
Fluid pressure set to high Reduce fluid pressure
Round pattern is misshapened PCD orifice is dirty Clean with proper cleanout drill
PCD orifice worn Replace PCD
Pressure imbalance Module ports dirty Clean ports with proper cleanout drill
Module ports worn Re-dril module ports to next larger size
A& B viscosity not equal Adjust temperature of A& B
Basket filters dirty Clean basket filters
Gelled, or hardened material in air Material crossover, air in hoses Clean or replace check valves
passages feeding air air cap
Material leakage at rear seal Rear seal packing nut too loose Tighten packing nut slightly
Rear seal worn or damaged Replace rear seal
Rapid material buildup on PCD or air cap Insuficient air flow to air cap Increase air flow
Worn orifice in PCD Replace PCD
Gun triggers slowly O-rings dry Lubricate with air tool oil
Air leakage under trigger paddle Damaged spool valve o-rings Replace spool valve o-rings
Damaged or worn piston o-ring Replace piston o-ring

20
Parts Identification
Section