Nordson OptiMix Reference guide

Low-Pressure
OptiMixtSystem
Customer Product Manual
Part 303783B
NORDSON CORPORATION DAMHERST, OHIO DUSA
For parts and technical support, call the Industrial Coating
Systems Customer Support Center at [phone] or
contact your local Nordson representative.
This document is subject to change without notice.
Check http://emanuals.nordson.com for the latest version.

E1999 Nordson Corporation
All rights reserved
303 783B
Issued 5/99
Manual 14-25
Nordson Corporation welcomes requests for information, comments and inquiries about its products.
Address all correspondence to
Nordson Corporation
555 Jackson Street
Amherst, OH 44001
Notice
This is a Nordson Corporation publication which is protected by copyright. Original copyright date 1998. No part of
this document may be photocopied, reproduced, or translated to another language without the prior written consent
of Nordson Corporation. The information contained in this publication is subject to change without notice.
Trademarks
100 Plus, Blue Box, ChromaFlex, CleanSleeve, CleanSpray, Control Coat, Cross-Cut, Easy Coat, Econo-Coat,
Excel 2000, Flow Sentry, Isocoil, Isocore, Iso-Flo, Nordson, the Nordson logo, PRX, Pro-Flo, RBX, Ready-Coat,
Rhino, Select Coat, Select Cure, Shur-Lok, Smart Spray, System Sentry, Thread Coat, Tribomatic, and Versa-Spray
are registered trademarks of Nordson Corporation.
CPX, CanWorks, Excel 2000, OptiMix, PowderGrid, Pulse Spray, SCF, Versa-Coat, Versa Screen, Package of
Values, and Swirl Coat are trademarks of Nordson Corporation.
Loctite is a registered trademark of Henkel Loctite Corporation.

Table of Contents i
E1999 Nordson Corporation
All rights reserved 303 783B
Issued 5/99
Manual 14-25
Table of Contents
1. Safety 1.....................................................
Qualified Personnel 1.......................................
Intended Use 1.............................................
Regulations and Approvals 1.................................
Personal Safety 2...........................................
High-Pressure Fluids 3....................................
Fire Safety 4...............................................
Halogenated Hydrocarbon Solvent Hazards 5................
Action in the Event of a Malfunction 5.........................
Disposal 5.................................................
2. Description 6.................................................
Specifications 7............................................
3. Installation 8.................................................
4. Operation 12.................................................
Startup 12.................................................
Checking the Ratio 12.......................................
Full System Flush 13........................................
Relieving Pressure 13....................................
Flushing System 14......................................
Quick Flush 15.............................................
Resin Flush 16.............................................
Shutdown 16...............................................
5. Maintenance 17...............................................
6. Troubleshooting 17............................................

Table of Contents
ii
E1999 Nordson Corporation
All rights reserved
303 783B
Issued 5/99
Manual 14-25
7. Hydraulic Section Repair 18....................................
Low-Pressure Resin Pump 18................................
Disconnecting the Hydraulic Section from the Air Motor 19.......
Disassembling the Hydraulic Section 20.....................
Honing the Cylinder 20....................................
Rebuilding the Foot Valve Housing 22.......................
Rebuilding the Upper Ball Check Assembly 22...............
Connecting the Hydraulic Section to the Air Motor 23.........
Low-Pressure Catalyst Pump 24..............................
Disconnecting the Hydraulic Section from the Unit 24.........
Disassembling the Hydraulic Section 25.....................
Honing the Cylinder 25....................................
Assembling the Hydraulic Section 26.......................
1:1 Fluid Section Pump 27.................................
2:1 Fluid Section Pump 28.................................
3:1 Fluid Section Pump 29.................................
Repairing the Air Motor 30...................................
Servicing Signal Valves 31................................
Servicing the Main Valve 32...............................
Servicing the Pilot Valve 34................................
8. Parts 36.....................................................
Material Pump Rebuild Kit 37................................
Pilot Valve Rebuild Kit 37....................................
1:1 Fluid Section Rebuild Kit 37..............................
2:1 Fluid Section Rebuild Kit 38..............................
3:1 Fluid Section Rebuild Kit 38..............................
Main Valve Rebuild Kit 38....................................
Gasket Kit 39..............................................
Signal Valve Rebuild Kit 39..................................
Piston Seal Rebuild Kit 40...................................
Manifold Rebuild Kit 40......................................

Low-Pressure OptiMix System 1
E1999 Nordson Corporation
All rights reserved 303 783B
Issued 5/99
Manual 14-25
Low-Pressure OptiMix System
Read and follow these safety instructions. Task- and equipment-specific
warnings, cautions, and instructions are included in equipment
documentation where appropriate.
Make sure all equipment documentation, including these instructions, is
accessible to persons operating or servicing equipment.
Equipment owners are responsible for making sure that Nordson
equipment is installed, operated, and serviced by qualified personnel.
Qualified personnel are those employees or contractors who are trained
to safely perform their assigned tasks. They are familiar with all relevant
safety rules and regulations and are physically capable of performing
their assigned tasks.
Use of Nordson equipment in ways other than those described in the
documentation supplied with the equipment may result in injury to
persons or damage to property.
Some examples of unintended use of equipment include
Susing incompatible materials
Smaking unauthorized modifications
Sremoving or bypassing safety guards or interlocks
Susing incompatible or damaged parts
Susing unapproved auxiliary equipment
Soperating equipment in excess of maximum ratings
Make sure all equipment is rated and approved for the environment in
which it is used. Any approvals obtained for Nordson equipment will be
voided if instructions for installation, operation, and service are not
followed.
1. Safety
Qualified Personnel
Intended Use
Regulations and Approvals

Low-Pressure OptiMix System
2
E1999 Nordson Corporation
All rights reserved
303 783B
Issued 5/99
Manual 14-25
To prevent injury follow these instructions.
SDo not operate or service equipment unless you are qualified.
SDo not operate equipment unless safety guards, doors, or covers are
intact and automatic interlocks are operating properly. Do not bypass
or disarm any safety devices.
SKeep clear of moving equipment. Before adjusting or servicing
moving equipment, shut off the power supply and wait until the
equipment comes to a complete stop. Lock out power and secure the
equipment to prevent unexpected movement.
SRelieve (bleed off) hydraulic and pneumatic pressure before adjusting
or servicing pressurized systems or components. Disconnect, lock
out, and tag switches before servicing electrical equipment.
SWhile operating manual spray guns, make sure you are grounded.
Wear electrically conductive gloves or a grounding strap connected to
the gun handle or other true earth ground. Do not wear or carry
metallic objects such as jewelry or tools.
SIf you receive even a slight electrical shock, shut down all electrical or
electrostatic equipment immediately. Do not restart the equipment
until the problem has been identified and corrected.
SObtain and read Material Safety Data Sheets (MSDS) for all materials
used. Follow the manufacturer’s instructions for safe handling and
use of materials, and use recommended personal protection devices.
SMake sure the spray area is adequately ventilated.
STo prevent injury, be aware of less-obvious dangers in the workplace
that often cannot be completely eliminated, such as hot surfaces,
sharp edges, energized electrical circuits, and moving parts that
cannot be enclosed or otherwise guarded for practical reasons.
Personal Safety

Low-Pressure OptiMix System 3
E1999 Nordson Corporation
All rights reserved 303 783B
Issued 5/99
Manual 14-25
High-Pressure Fluids
High-pressure fluids, unless they are safely contained, are extremely
hazardous. Always relieve fluid pressure before adjusting or servicing
high pressure equipment. A jet of high-pressure fluid can cut like a knife
and cause serious bodily injury, amputation, or death. Fluids penetrating
the skin can also cause toxic poisoning.
If you suffer a fluid injection injury, seek medical care immediately. If
possible, provide a copy of the MSDS for the injected fluid to the health
care provider.
The National Spray Equipment Manufacturers Association has created a
wallet card that you should carry when you are operating high-pressure
spray equipment. These cards are supplied with your equipment. The
following is the text of this card:
WARNING: Any injury caused by high pressure liquid can be
serious. If you are injured or even suspect an injury:
SGo to an emergency room immediately.
STell the doctor that you suspect an injection injury.
SShow him this card.
STell him what kind of material you were spraying.
MEDICAL ALERT—AIRLESS SPRAY WOUNDS: NOTE TO PHYSICIAN
Injection in the skin is a serious traumatic injury. It is important to treat
the injury surgically as soon as possible. Do not delay treatment to
research toxicity. Toxicity is a concern with some exotic coatings injected
directly into the bloodstream.
Consultation with a plastic surgeon or a reconstructive hand surgeon may
be advisable.
The seriousness of the wound depends on where the injury is on the
body, whether the substance hit something on its way in and deflected
causing more damage, and many other variables including skin
microflora residing in the paint or gun which are blasted into the wound.
If the injected paint contains acrylic latex and titanium dioxide that
damage the tissue’s resistance to infection, bacterial growth will flourish.
The treatment that doctors recommend for an injection injury to the hand
includes immediate decompression of the closed vascular compartments
of the hand to release the underlying tissue distended by the injected
paint, judicious wound debridement, and immediate antibiotic treatment.

Low-Pressure OptiMix System
4
E1999 Nordson Corporation
All rights reserved
303 783B
Issued 5/99
Manual 14-25
To avoid a fire or explosion, follow these instructions.
SGround all conductive equipment in the spray area. Use only
grounded air and fluid hoses. Check equipment and workpiece
grounding devices regularly. Resistance to ground must not exceed
one megohm.
SShut down all equipment immediately if you notice static sparking or
arcing. Do not restart the equipment until the cause has been
identified and corrected.
SDo not smoke, weld, grind, or use open flames where flammable
materials are being used or stored.
SDo not heat materials to temperatures above those recommended by
the manufacturer. Make sure heat monitoring and limiting devices are
working properly.
SProvide adequate ventilation to prevent dangerous concentrations of
volatile particles or vapors. Refer to local codes or your material
MSDS for guidance.
SDo not disconnect live electrical circuits while working with flammable
materials. Shut off power at a disconnect switch first to prevent
sparking.
SKnow where emergency stop buttons, shutoff valves, and fire
extinguishers are located. If a fire starts in a spray booth,
immediately shut off the spray system and exhaust fans.
SShut off electrostatic power and ground the charging system before
adjusting, cleaning, or repairing electrostatic equipment.
SClean, maintain, test, and repair equipment according to the
instructions in your equipment documentation.
SUse only replacement parts that are designed for use with original
equipment. Contact your Nordson representative for parts
information and advice.
Fire Safety

Low-Pressure OptiMix System 5
E1999 Nordson Corporation
All rights reserved 303 783B
Issued 5/99
Manual 14-25
Halogenated Hydrocarbon Solvent Hazards
Do not use halogenated hydrocarbon solvents in a pressurized system
that contains aluminum components. Under pressure, these solvents
can react with aluminum and explode, causing injury, death, or property
damage. Halogenated hydrocarbon solvents contain one or more of the
following elements:
Element Symbol Prefix
Fluorine F “Fluoro-”
Chlorine Cl “Chloro-”
Bromine Br “Bromo-”
Iodine I “Iodo-”
Check your material MSDS or contact your material supplier for more
information. If you must use halogenated hydrocarbon solvents, contact
your Nordson representative for information about compatible Nordson
components.
If a system or any equipment in a system malfunctions, shut off the
system immediately and perform the following steps:
SDisconnect and lock out system electrical power. Close hydraulic and
pneumatic shutoff valves and relieve pressures.
SIdentify the reason for the malfunction and correct it before restarting
the system.
Dispose of equipment and materials used in operation and servicing
according to local codes.
Action in the Event of a
Malfunction
Disposal

Low-Pressure OptiMix System
6
E1999 Nordson Corporation
All rights reserved
303 783B
Issued 5/99
Manual 14-25
See Figure 1. The low-pressure OptiMix system is designed for use in air
spray, air electrostatic, and HVLP applications, both manual and
automatic. The high-volume displacement of the base and catalyst
pumps keep duty cycles low even at high volume output requirements.
This low-pressure system offers a choice of three ratio ranges; 2:1 to
18:1, 4:1 to 35:1, and 6:1 to 55:1. There are three separate catalyst
pump systems, one for each ratio range.
1425001A
Fig. 1 Low-Pressure OptiMix System Assembly
2
. Description

Low-Pressure OptiMix System 7
E1999 Nordson Corporation
All rights reserved 303 783B
Issued 5/99
Manual 14-25
Refer to Table 1 for a list of the specifications necessary to operate the
low-pressure OptiMix system.
Table 1 Low-Pressure OptiMix System Specifications
Fluid-to-Air Pressure Ratio (1)
Low Pressure
4:1
High Pressure
16:1
Conversion Coating
4:1 13:1
Delivery: Liters per min
(gallons per min) (4)
15 cycles (2)
30 cycles
60 cycles
2.725 (0.72)
5.450 (1.44)
10.901 (2.88)
1.192 (0.315)
2.385 (0.630)
4.769 (1.260)
2.725 (0.72)
5.450 (1.44)
10.901 (2.88)
1.192 (0.315)
2.385 (0.630)
4.769 (1.260)
Fluid outlet connection 1/4in. NPS (f) 1/2-20 JIC (f) 1/4in. NPS (f) 1/2-20 JIC (f)
Cycles per liters (gallon)(4) 5.52 (20.8) 12.7 (47.6) 5.52 (20.8) 12.7 (47.6)
Liters (gallons) per cycles (4) 0.181 (0.048) 0.079 (.021) 0.181 (0.048) 0.079 (0.021)
Fluid pressure range kg/cm2
(psig) (3) 4.2−22.4 (60−320) 16.8−89.6
(240−1600)
4.2−22.4 (60−320) 16.8−89.6
(240−1600)
Minimum air line size
recommended (ID)
9.5 mm (3/8in.) 9.5 mm (3/8in.) 9.5 mm (3/8in.) 9.5 mm (3/8in.)
Air motor: Diameter 82.6 mm (31/4in.) 133.4 mm (51/4in.) 82.6 mm (31/4in.) 82.6 mm (31/4in.)
Overall dimensions
l x d x h
615 x 615 x 1179 mm
(24 x 24 x46 in.)
821 x 385 x 1179 mm
(32 x 15 x 46 in.)
615 x 615 x 1179 mm
(24 x 24 x46 in.)
615 x 615 x 1179 mm
(24 x 24 x46 in.)
Normal operating air pressure 1.05 to 5.6 kg/cm2(15 to 80 psig)
Maximum air pressure
recommended
7.0 kg/cm2(100 psig)
High-pressure hoses ID 6.4 or 9.5 mm (1/4or 3/8in.)
Air inlet connection 3/8in. NPT (f)
Ratio range 2:1−55:1 1:1−7.8:1 0.5%−4.5% 1%−10%
(1) Choose the proper fluid to air pressure ratio to achieve the required fluid pressure at the lowest pump cycling rate within a
realistic air pressure range of 1.05 to 5.6 kg/cm2(15 to 80 psig). Mid-range ratios (16:1) are desirable where fluid pressure of 35
to 84 kg/cm2(500 psig to 1200 psig) are required.
(2) 1 cycle = 2 strokes.
(3) Fluid pressure capability based upon a normal operating air pressure range of 1.05 to 5.6 kg/cm2(15 to 80 psig).
(4) Delivery listed is resin pump only. Ratio required will be determined to calculate maximum unit delivery.
Specifications

Low-Pressure OptiMix System
8
E1999 Nordson Corporation
All rights reserved
303 783B
Issued 5/99
Manual 14-25
WARNING: Allow only qualified personnel to perform the
following tasks. Observe and follow the safety instructions in
this document and all other related documentation.
1. See Figure 2. Connect the solvent supply line from the solvent feed
to the solvent inlet (3) on the mixing block (4).
2. Connect the fluid line from the catalyst supply to the catalyst pump
inlet (15).
3. Connect the fluid line from the resin supply to the resin pump
inlet (16).
4. Connect the main air to the air input (12) on the mixer manifold (2).
The main air pressure should not be set above 7 bar (100 psi).
5. Connect the static mixer to the material outlet (6).
6. Fill catalyst pump lube cup (8) and the resin lube cup (13) with
solvent chamber fluid.
7. Apply grease to slave arm mechanism (14).
8. Set the catalyst pump to the desired ratio.
a. Refer to Table 2. Look at the ratio chart to find the correct pinhole
setting for the desired ratio.
NOTE: Both slave arm and fixed arm must have pins in same pinhole
setting.
b. See Figure 3. Remove the pin from the slave arm (1) and move it
to the desired pinhole setting (2).
c. Remove pins from fixed arm (3) and move it to the desired pinhole
setting (2).
9. Connect the spray device to the static mixer.
10. Flush unit with solvent compatible with material to be mixed. Refer to
Full Systems Flush in the Operations section.
3
. Installation

Low-Pressure OptiMix System 9
E1999 Nordson Corporation
All rights reserved 303 783B
Issued 5/99
Manual 14-25
1425002A
14
1
2
5
7
8
9
10
11
12
13
3
4
6
5
15 16
Fig. 2 System Components
1. Bleed-type master air valve
2. Mixer manifold
3. Solvent inlet
4. Mixing block
5. Ratio test sampling tubes
6. Material outlet for static mixer
7. Catalyst pump
8. Catalyst pump lube cup
9. Resin pump
10. Air motor
11. Air regulator knob
12. Air input
13. Resin pump lube cup
14. Slave arm mechanism
15. Catalyst pump inlet
16. Resin pump inlet

Low-Pressure OptiMix System
10
E1999 Nordson Corporation
All rights reserved
303 783B
Issued 5/99
Manual 14-25
Table 2 Low-Pressure Ratio Chart
Position cc/Cycle 1:1 OptiMix System 2:1 OptiMix System 3:1 OptiMix System
Hole Base Pump cc/Cycle Ratio cc/Cycle Ratio cc/Cycle Ratio
1 182 9.93 18.3:1 5.2 35:1 3.31 54.94:1
2 182 14.90 12.2:1 7.8 23.33:1 4.968 36.6:1
3 182 19.87 9.15:1 10.4 17.5:1 6.625 27.47:1
4 182 24.84 7.3:1 13 14:1 8.28 21.98:1
5 182 29.81 6.1:1 15.6 11.66:1 9.93 18.31:1
6 182 34.78 5.23:1 18.2 10:1 11.59 15.7:1
7 182 39.75 4.57:1 20.8 8.75:1 13.25 13.73:1
8 182 44.71 4.06:1 23.4 7.77:1 14.9 12.21:1
9 182 49.68 3.66:1 26 7:1 16.56 10.98:1
10 182 54.65 3.33:1 28.6 6.36:1 18.21 9.99:1
11 182 59.62 3.05:1 31.2 5.83:1 19.875 9.15:1
12 182 64.59 2.8:1 33.8 5.38:1 21.53 8.45:1
13 182 69.56 2.6:1 36.4 5:1 23.187 7.84:1
14 182 74.53 2.44:1 39 4.66:1 24.84 7.32:1
15 182 79.50 2.28:1 41.6 4.375:1 26.5 6.867:1
16 182 84.46 2.15:1 44.2 4.117:1 28.15 6.46:1
17 182 89.43 2:1 46.8 3.88:1 29.81 6:1
3
. Installation (contd.)

Low-Pressure OptiMix System 11
E1999 Nordson Corporation
All rights reserved 303 783B
Issued 5/99
Manual 14-25
1425004B
2
1
3
Fig. 3 Ratio Pin Settings
1. Slave arm
2. Pinhole settings
3. Fixed arm

Low-Pressure OptiMix System
12
E1999 Nordson Corporation
All rights reserved
303 783B
Issued 5/99
Manual 14-25
WARNING: Allow only qualified personnel to perform the
following tasks. Observe and follow the safety instructions in
this document and all other related documentation.
When the system has been flushed and the proper ratio has been set,
the system is ready to supply the fluid to the spray devices.
See Figure 4.
NOTE: The manifold handle controls the fluid flow. When the manifold
handle is up, base and catalyst material is supplied to the spray device.
In the down position, base and catalyst material is exited to the ratio test
sampling tubes. In the middle position the flow of material stops.
1. Place a container under the two ratio test sampling tubes (8) and turn
the manifold handle (7) to the down position.
2. Slowly increase the air pressure until the system begins to stroke and
a smooth flow of resin and catalyst are present.
NOTE: Should the resin pump cavitate and build up pressure in the
catalyst pump, a relief valve will let catalyst flow into a plastic overflow
bottle.
3. Return the mix manifold handle (7) to the middle position.
4. The operator should then perform a ratio check.
To check the ratio, the system must be in operating condition. Both resin
and catalyst pumps should be purged through the mixer manifold.
Perform the following steps for initial start-up tests or tests during
production. See Figure 4.
1. Perform a quick flush.
CAUTION: There will be some residual pressure left in the
system.
2. Place a container under the ratio test sampling tubes (8) and turn the
manifold handle (7) down.
4
. Operation
Startup
Checking the Ratio

Low-Pressure OptiMix System 13
E1999 Nordson Corporation
All rights reserved 303 783B
Issued 5/99
Manual 14-25
3. Place a graduated beaker under each ratio test sampling tube and
slowly increase the pressure until the pump gradually begins to
stroke.
4. Fill the graduated beaker to the desired levels and then slowly
decrease the pressure back to zero.
5. Check fluid levels on graduated beakers and make adjustments to the
catalyst pump if necessary. When desired levels are reached,
operator is now ready to load paint out to spray device.
6. Turn the manifold handle back to the up position and increase system
air back to working pressure.
7. Trigger the spray device into the container until the mixed material is
present. The system is now ready for painting.
NOTE: Flush new or rebuilt pumps with solvent prior to introducing
coating to the system. When changing coating materials or colors, flush
the pump to remove all traces of the old material before introducing a
new one into the system.
Perform a full system flush
Sto change colors
Sto do maintenance on the system
Sfor daily shutdown.
Relieving Pressure
1. Turn off the main air supply.
2. Carefully trigger the spray device to relieve pressure. See Figure 2.
Place a container under the ratio test sampling tubes (5).
3. Turn the manifold handle to the down position to relieve pressure in
the system.
4. Close the ratio test sampling tubes by turning the manifold handle to
the center position.
Full System Flush

Low-Pressure OptiMix System
14
E1999 Nordson Corporation
All rights reserved
303 783B
Issued 5/99
Manual 14-25
Flushing System
Introduce solvent through the intake siphon tube of both catalyst and
resin pumps. Refer to the material manufacturer’s recommendation for
cleaning solvent.
NOTE: It is recommended to leave solvent in the OptiMix after flushing.
1. See Figure 2. Close the bleed-type master air valve (1), and turn the
air-regulator knob (11) to zero bar/psi.
2. Open the bleed-type master air valve (1).
1425005A
1
6
5
7
8
42 3
Fig. 4 Mixer Manifold
1. Resin fluid line
2. Catalyst solvent needle valve
3. Resin solvent needle valve
4. Solvent inlet
5. Mixing block
6. Catalyst fluid line
7. Manifold handle
8. Ratio test sampling tubes

Low-Pressure OptiMix System 15
E1999 Nordson Corporation
All rights reserved 303 783B
Issued 5/99
Manual 14-25
3. See Figure 4. Turn the manifold handle (7) to the up position.
Trigger the spray device and slowly open the regulator until the
system begins pumping.
4. Allow the pump to cycle slowly until all the paint is flushed out of the
lines. Release the trigger—the pump will stall against the pressure.
5. Turn the air regulator knob to zero.
6. Trigger the spray device to relieve line pressure.
7. Turn the manifold handle to the down position.
8. Slowly open the regulator until the system starts pumping solvent
through the ratio test sampling tubes (8). Use a container to catch
the solvent as it flows out through the ratio test sampling tubes.
9. Turn the air regulator knob to zero and turn the manifold handle to the
middle (off) position. The system is now flushed.
Flush the system often enough to prevent fluid from reacting or curing in
the mixer, hoses, and spray devices. Contact your material manufacturer
for the effective pot life of the material you are using.
1. See Figure 4. Make sure that the manifold handle (7) is in the off
position.
2. Slowly open the solvent needle valves (2) on the catalyst side of the
manifold.Apply proper solvent pressure to push mixed material out.
3. Trigger the spray device until clear solvent is present.
4. Close the solvent needle valve on the catalyst side of the manifold.
5. Slowly open the solvent needle valve (3) on the resin side of the
manifold. Apply proper solvent pressure to push mixed material out.
6. Trigger spray device until resin in mix manifold is flushed out.
7. Close the resin side needle valve (3).
8. Trigger the spray device to relieve pressure.
NOTE: Make sure the solvent needle valves are closed completely to
avoid unwanted solvent from flowing into catalyzed material.
Quick Flush

Low-Pressure OptiMix System
16
E1999 Nordson Corporation
All rights reserved
303 783B
Issued 5/99
Manual 14-25
To do a resin flush, complete the following steps:
1. Turn off the main air pressure.
2. Bleed off pressure in all paint lines.
3. See Figure 3. Push slave arm pin (2) in to disconnect catalyst pump.
4. See Figure 4. Slowly open the catalyst solvent needle valves (2).
Apply proper solvent pressure to push mixed material out.
5. Flush resin pump by introducing solvent and running resin pump until
clean solvent is pushed all the way to the gun tip. (Catalyst pump is
disabled during this process.)
6. Repeat step 5 with new resin.
7. When new resin is purged, turn off air pressure, reconnect the slave
arm pin and begin spraying.
8. Trigger devise until catalyzed paint is present at gun tip.
1. See Figure 4. Place the manifold handle (7) to the middle position.
2. Perform a full system flush. Refer to Full System Flush in this
section.
3. Maintain pressure on the resin and catalyst pump.
4. Stop the resin pump with the shaft in the up position. Turn off air to
avoid injury.
5. See Figure 2. Empty the resin solvent chamber fluid cup (8). Clean
and refill with solvent chamber fluid.
6. Empty catalyst solvent chamber fluid cup (13). Clean and refill with
solvent chamber fluid.
CAUTION: If the pump is stopped in the up position, any
polyester residue on the shaft could air dry and harden. The
abrasive buildup could attack the upper seal.
7. Cycle the pumps so that they can be left in the down position during
the shutdown period.
Resin Flush
Shutdown