Unist 4210 Series User manual

Low Volume
Spray Nozzles
Operation Manual

Questions or part orders:
1-800-253-5462 (US & Canada)
1-616-949-0853 (International)
Low Volume Spray Nozzles Operation Manual
Copyright © 2018 Unist, Inc.
06/29/2018 V1.0

Connecting to an SPR-2000™
controller will give each nozzle
its own uid and air supply.
This gives the most consistent
spray results since uid and air
supply are consistent for each
nozzle. This is the preferred
method.
Solenoid
valve
bank
Connecting to an SPR-2000™
controller will give each nozzle
its own air supply, but they will
share a uid line (daisy chained).
This approach has fewer
connections back at the solenoid
valve bank, but is more susceptible
to having nozzles spray differently
due to differing uid pressures at
each nozzle.
Solenoid
valve
bank
Compressed air
Low Volume Spray Nozzles Quick Start Guide
4210 series (standard nozzles)
Pressurized uid supply
Connection Options
Compressed air
1. Direct Operation (page 7)
3. Manual Valve Operation (page 9)
2. Daisy Chain Operation (page 8)
Pressurized uid supply
Manual
valve
Compressed air
Pressurized uid supply
Connect uid
AConnect uid supply D
Connect air
BAdjust E
Connect air supply
C
Connect uid Connect uid supply
Connect air Adjust
Connect air supply
AD
B E
C
A
A
A
E
E
B
B
B
B
B
C
D
D
B
BB
Connect uid
A
Connect air
B
Connect air supply
C
Connect uid supply
D
Adjust
E
E
E
C
A
A
D
D
E
E
C
Elbow at liquid port
ends daisy chain

Connecting to an SPR-2000™ controller will give each
nozzle its own its own uid supply, air supply, and
actuation air.
Low Volume Spray Nozzles Quick Start Guide
4230 series (remote nozzles)
1. Remote Operation (page 10)
Remote
adjustment
solenoid
valve bank
Compressed air
Pressurized uid supply
Connect uid
A
Connect air
B
Connect atomizing air
C
Connect air supply
D
Connect uid supply
E
Adjust
F
A
F
F
A
E
C
B
B
C
D

Important Operator Information
Consult this documentation in all cases where this caution symbol appears. This symbol is used to inform
you of any potential HAZARD or actions that require your attention.
Use of this equipment in a manner other than that specied by Unist, Incorporated may compromise design integrity
and become unsafe.
WARNING: This equipment is not intended for use in explosive environments.
ADVERTENCIA: Este equipo no está diseñado para uso en atmósferas explosivas.
AVVERTIMENTO: Questa apparecchiatura non è inteso per l’uso in ambienti esplosivi
WARNUNG: Das Ausrüstung darf in einer explosiven Umgebung NICHT verwendet werden.
AVERTISSEMENT: Cet équipement n’est pas prévu pour une utilisation dans des environnements explosifs

Identifying Symbols
Caution - ISO 7000-0434B

Table Of Contents
Introduction ...........................................................................................................................................1
Thank You..................................................................................................................................1
System Requirements ...............................................................................................................1
How It Works ..................................................................................................................................... 2-3
Installation ....................................................................................................................................... 4-10
Mounting....................................................................................................................................4
Dimensions ......................................................................................................................4
Articulating Arm................................................................................................................4
Adjustable Magnet Mount ................................................................................................4
Modular Mounting System ...............................................................................................4
Modular Mounting System Assembly .................................................................................... 5-6
Fluid & Air Connections ....................................................................................................... 7-10
4210 Series (Direct Operation) ........................................................................................7
4210 Series (Daisy Chain Operation) ..............................................................................8
4210 Series (Manual Valve Operation) ............................................................................9
4230 Series (Remote Operation)...................................................................................10
Startup & Operation ..................................................................................................................... 11-13
Preliminary...............................................................................................................................11
At The Nozzle (4210 Series Only) .................................................................................11
At The Valve Stack (4230 Series Only)..........................................................................11
Prime The System ............................................................................................................. 12-13
Ensure Air Is Connected ................................................................................................12
Ensure Fluid Is Connected ............................................................................................13
Adjust The Spray Pattern ........................................................................................................13
Adjust The System For Pressure Drops ..................................................................................13
Troubleshooting ........................................................................................................................... 14-15
Rebuild Kit Instructions ............................................................................................................... 16-19
Appendix A: 4210 Series Drawing ....................................................................................................20
Appendix B: 4230 Series Drawing ....................................................................................................21
Appendix C: 4210 Series Part Numbering Scheme .........................................................................22
Appendix D: 4230 Series Part Numbering Scheme .........................................................................23
Appendix E: Low Volume Spray Nozzle Spray Patterns .................................................................24
Notes....................................................................................................................................................25

1
Thank You
Thank you for your purchase of the Unist Low Volume
Spray Nozzles. Please take the time to read this operation
manual to take full advantage of your new nozzles.
System Requirements
Air supply pressure: 40-100 psi [3-7 bar]
(dry ltered compressed air)
Fluid supply pressure: 20-100 psi [1.4-7 bar]
Maximum cycle rate: 200 cycles per min
Operating temp range: 40-150˚F [4-65˚C]
Fluid viscosity range: 31-3500 SUS
Introduction
Fine tune uid ow
rate independently
with needle valve
(LIQUID)
Integral valve features
immediate on/off
control
Pressurized uid
connection
(LIQUID)
Fine tune air ow
rate independently
with needle valve
(AIR)
Actuation &
atomizing air
(AIR)
Delivers consistent &
controlled spray pattern
Standard Low Volume Spray Nozzle (4210 Series)
Remote Low Volume Spray Nozzle (4230 Series)
Atomizing air
(Atomize)
Actuation air
connection
(On/Off) Pressurized uid
connection
(Liquid)
Delivers consistent &
controlled spray pattern
Remote Low Volume Spray Nozzles
utilize needle valves that are built into
the solenoid valve. This allows
adjustment of the spray pattern if
the nozzle is in a hard to reach area.
Figure 1: Standard Low Volume Spray Nozzle
Figure 2: Remote Low Volume Spray Nozzle

2
The Low Volume Spray Nozzle has an integral valve that maintains uid pressure right to the tip of the nozzle, and uses
the air signal to actuate a diaphragm that operates the nozzle. This provides immediate on and off control, which
eliminates lag and prevents messy uid drips.
Pressurize uid is in the area highlighted in red. When the nozzle is off, the piston assembly is sealed against the
small O-ring at the tip of the nozzle. When the nozzle is on, the piston assembly is pulled away from the small O-ring,
as shown in Figures 3 and 4.
How It Works
Figure 3: Turning the Low Volume Spray Nozzle on
Figure 4: Up-close view of the piston assembly pulled
away from the small O-ring (nozzle spraying)

3
A compressed air signal from the valve goes to the chamber highlighted in red. When the nozzle is on, the chamber
is pressurized. When the nozzle is off, the chamber is not pressurized and the spring forces the piston assembly
against the bottom O-ring, turning the uid ow off, as shown in Figures 5 and 6.
How It Works
Figure 5: Turning the Low Volume Spray Nozzle off
Figure 6: Up-close view of the piston assembly
pushed up against the small O-ring (nozzle closed)

4
Mounting
Dimensions
Articulating Arm
If your nozzle came with an articulating arm, thread
the stud into the nozzle and then mount the arm
where desired.
Adjustable Magnet Mount
If your nozzle came with an adjustable magnet mount,
screw the bar clamp into the nozzle and then mount the
magnet mount where desired.
Modular Mounting System
If your nozzle came with a modular mounting system,
assembly is shown on the next page.
Installation
1.25 in.
[31.8 mm]
2.27 in.
[57.7 mm]
1.71 in.
[43.4 mm]
1.25 in.
[31.8 mm]
2.00 in.
[50.8 mm]
1/4-20 Mounting hole
M6 X 1 Mounting hole
Figure 7: Low Volume Spray Nozzle dimensions
Figure 8: Articulating arm
Figure 9: Adjustable magnet mount
Figure 10: Modular mounting system

5
Modular Mounting System Assembly
Mounting the nozzles using the modular mounting
system requires three items:
1. The modular mounting kit (PN 301409-WW-HH, where
WW is the length of the horizontal rods in inches and HH
is the length of the vertical rods in inches).
2. A bar clamp and nozzle stud kit, one for each nozzle to
be mounted (PN 301596). This kit includes a 1/4-20 x 3/4”
SHCS bolt, a stainless steel sleeve, and a bar clamp.
3. The Low Volume Spray Nozzle(s) to be mounted.
When you are assembling the modular mounting kits,
you will need the following tools:
• A 3/16” Allen wrench for bar clamps
• A 3/32” Allen wrench for the set screw in the
base clamp
Note: Assembly is easier if you do it with the mount
lying at, then stand it up when it has been assembled.
1. Lay out the pieces, ensuring you have the vertical and
horizontal bars separated and matched.
2. Slide the nozzle mounting clamps onto the horizontal
bars. The number of clamps on each bar is dependent
on your specic nozzle arrangement. When the clamp
is at the desired position, tighten the clamp on the
horizontal bar.
Installation
Low Volume
Spray Nozzle
Vertical
rod
Horizontal
rod Nozzle
mounting
clamps
Bar clamp
Base plate
Stainless
steel sleeve 1/4-20 x
3/4” SHCS bolt
Figure 11: Complete modular mounting system
Figure 13: Sliding on the nozzle mounting clamps
Figure 12: Laying out the pieces

6
Figure 15: Sliding horizontal bars into clamps
3. Slide a bar clamp on the vertical bars, one for each
horizontal bar in the mount. When the clamp is at the
desired height, tighten the clamp on the vertical bar.
4. Slide the horizontal bars into the clamps on the
vertical bar and tighten.
5. Attach the base plate to the mount, and tighten the two
set screws.
6. Stand the mount up, so it is standing on the base
plates.
7. Attach the nozzles to the nozzle mounting clamps.
a. Slide the stainless steel sleeve into the bar clamp.
b. Insert the 1/4-20 bolt from the bottom of the
mounting clamp, through the sleeve, into the nozzle
body, and tighten until the nozzle is secure.
c. Mount the assembly where desired, and adjust the
angle and position of the nozzles by loosening the
bar clamp on the horizontal bar, and sliding or
rotating the nozzle as needed.
Installation
Figure 14: Sliding on the bar clamps
Figure 16: Attaching the base plates
Figure 17: Attaching Low Volume Spray Nozzles
Figure 18: Inserting sleeve & bolt

7
4. Connect the black nylon tubing between the AIR port
of the valve and the AIR port of the nozzle. Repeat for
the remaining nozzles.
5. Connect compressed air to the inlet of the regulator on
the top of the valve stack.
6. Connect pressurized uid to the liquid inlet on the
bottom of the valve stack.
The nozzles in the 4210 standard family can be connected
to a controller, such as the SPR-2000™controller, so that
each nozzle has its own uid and air supply (is directly
connected) or so that they share a uid line (daisy
chained). The direct method (Figure 19) is preferred
because it gives consistent uid and air pressure across all
nozzles in the bank. The daisy chain approach (Figure 20),
has fewer connections back at the solenoid valve bank,
but is more susceptible to variations due to differing uid
pressures at each nozzle. The same options are available
with a manual air valve, although it is rare a manual valve
is used with more than one nozzle.
Fluid & Air Connections
4210 Series (Direct Operation)
1. Connect clear nylon tubing to the LIQUID port of the
nozzle. Route the tubing to the valve stack. Ensure that
there is no uid pressure on the valve stack, and plug a
straight male quick disconnect tting into the appropriate
female quick disconnect of the valve stack.
2. Remove the nut from the male quick disconnect and trim
the tube length such that it will just slide over the barb
on the tting.
3. Slide the nut onto the hose and then push the tube onto
the barb of the quick disconnect. Use a 1/2” wrench to
keep the male quick disconnect from rotating and tighten
down the nut with a 3/8” wrench. Repeat for the remaining
valve/nozzle combinations.
Installation
Compressed air
SPR-2000™
Pressurized uid supply
6
5
Fully Assembled
Figure 19: 4210 Series (direct operation)
1
4
312

8
4210 Series (Daisy Chain Operation)
Fluid ports can be daisy chained together, but
performance will vary depending on how many nozzles
are in the chain, the length of the tubing between
nozzles, and how many nozzles are spraying at the
same time. Tubing should be kept as short as possible
for best response time and performance.
1. Connect clear nylon tubing between a pressurized
uid supply and the LIQUID port of the rst nozzle in
the chain.
2. Insert the uid supply tubing into output side of tee
on the rst nozzle, route the tubing, and insert it into the
input side of second nozzle’s tee. Repeat this for each
nozzle in the chain.
3. At the last nozzle in the chain (this has an elbow for
the LIQUID input and not a tee), attach the uid tubing
into the elbow.
4. Connect black nylon tubing between the outlet of each
valve to the AIR port of each nozzle.
5. Connect compressed air to the regulator on the inlet of
the valve stack.
Installation
Pressurized uid supply
Compressed air
1
54
Solenoid
valve bank
2
3
Fully Assembled
Figure 20: 4210 Series (daisy chain operation)
Use an elbow at the end
of the daisy chain
Use a tee for the
beginning and middle
of the daisy chain

9
3. Connect black nylon tubing between the
manual valve and the AIR port of the nozzle.
4210 Series (Manual Valve Operation)
When an electronic controller is not used, a manual valve
operation is also an option.
1. Connect clear nylon tubing between a pressurized
uid supply and the LIQUID port of the nozzle.
2. Connect compressed air to the manual valve.
Installation
Figure 21: 4210 Series (manual valve operation)
Fully Assembled
Compressed air
Pressurized uid
Manual
valve
1
3
2

10
4. Connect black nylon tubing between the On/Off air
port of the valve and the On/Off air port of the nozzle.
Repeat for the remaining valve/nozzle combinations.
5. Connect the red nylon tubing between the Atomize air
port of the valve and the Atomize air port of the nozzle.
Repeat for the remaining valve/nozzle combinations.
6. Connect compressed air to the inlet of the regulator
on the top of the valve stack.
7. Connect pressurized uid to the liquid inlet on the
bottom of the valve stack.
4230 Series (Remote Operation)
The nozzles in the 4230 remote family can be connected
to a controller, such as the SPR-2000™controller,
so that each nozzle has its own Liquid, Atomize air, and
On/Off air supply. The compressed air will turn the nozzle
on and off. The liquid and atomize air are used to create
the nozzle spray.
1. Connect the clear nylon tubing to the Liquid port of
the nozzle. Route the tubing to the valve stack. Ensure
that there is no uid pressure on the valve stack, and
plug a 90 degree male quick disconnect tting into the
appropriate female quick disconnect of the valve stack.
2. Remove the nut from the male quick disconnect and
trim the tube length such that it will just slide over the
barb on the tting.
3. Slide the nut onto the hose and then push the tube
onto the barb of the quick disconnect. Tighten down the
nut with a 3/8” wrench. Repeat for the remaining valve/
nozzle combinations.
Installation
Fully Assembled
1
1
4
4
2
3
5
5
Figure 22: 4230 Series (remote operation)
Compressed air
SPR-2000™
6
7
Pressurized uid supply

11
2. Close the Liquid needle valve on the lower part of
the solenoid valve that is attached to a nozzle by
turning the needle valve clockwise until the needle
valve is closed.
3. Repeat for each solenoid valve in the stack at the
controller.
4. Use the controller to turn off all the solenoid valves in
the stack. If using the SPR-2000™with the factory
supplied program, this is already done.
This procedure is for setting up and operating the spray
nozzles using a Unist SPR-2000™controller. If other
controllers are used, the details will change, but the
general approach will still be valid. This assumes the
nozzles have already been installed.
Preliminary
At The Nozzle (4210 Series Only)
1. Close the LIQUID needle valve on the side of the
nozzle body by turning the needle valve clockwise until
the needle valve is closed.
2. Close the AIR needle valve on the other side of
the nozzle body by turning the needle valve clockwise
until the valve is closed, then open it 1/2 turn
counter-clockwise.
3. Repeat for each nozzle.
At The Valve Stack (4230 Series Only)
1. Close the Atomize needle valve on the top of
solenoid valve that is attached to a nozzle by turning
the needle valve clockwise until the valve is closed,
then open it 1/2 turn counter-clockwise.
Startup & Operation
Figure 23: Closing LIQUID needle valve
Figure 24: Closing AIR needle valve
Figure 25: Closing Atomize needle valve
Figure 26: Closing Liquid needle valve
Figure 27: Turning off solenoid valves

12
Prime The System
Ensure Air Is Connected
1. Actuate the solenoid valve and ensure air is coming
out of the attached nozzle using the prime button on the
SPR-2000™controller.
a. If no air is coming out, refer to the
Troubleshooting: Air not coming out of nozzle
section of this manual (page 9).
2. (4210 series) Close the AIR needle valve on the side
of nozzle body. (4230 series) Close the Atomize needle
valve at the top of the solenoid valve.
3. Repeat for each nozzle.
5. Ensure all uid connections between the solenoid
valves and the Liquid ports on the nozzles are secure,
then turn on uid pressure to the solenoid valve stack.
6. Ensure that the uid pressure coming to the controller
is above 20 psi [1.4 bar].
a. If you have a Unist tank, you can turn on uid
pressure by sliding the manual slide valve on the
tank towards the regulator.
7. Turn on air pressure to the solenoid valve stack,
and set the air pressure with the regulator. The pressure
should be above 40 psi [3 bar] for one nozzle. If you are
using multiple nozzles at the same time, the pressure
should be greater than 40 psi [3 bar], but should not
exceed 100 psi [7 bar]. For a system with 2 to 4 nozzles,
40 psi [3 bar] is generally a good starting point.
Figure 28: Checking all uid connections
Figure 29: Turning on uid pressure from tank
Startup & Operation
Figure 30: Actuate each solenoid valve with prime button
Figure 31: Closing AIR needle valve
Figure 32: Closing Atomize needle valve