Graco 310538M User Manual
Instructions–Parts List
Therm–O–FlowR
Automatic Dispense Valves
Air–operated dispense valves. For professional use only.
Important Safety Instructions
Read all warnings and instructions in this manual.
Save these instructions.
310538M
EN
Model 918483 Shown
Table of Contents
List of Models 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Warnings 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Troubleshooting 10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Service 11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Parts 20. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Accessories 43. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Dimensions 45. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Technical Data 47. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Graco Standard Warranty 48. . . . . . . . . . . . . . . . . . . . . .
Graco Information 48. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
List of Models
Valve
Type
TOF 194485 Snuff Back 120 V / 6 241 bar, 24 MPa (3500 psi) 10 bar, 1 MPa (150 psi) 20
TOF 918483 Snuff Back 120 V / 6 241 bar, 24 MPa (3500 psi) 10 bar, 1 MPa (150 psi) 22
TOF 918639 Snuff Back 120 V / 6 241 bar, 24 MPa (3500 psi) 10 bar, 1 MPa (150 psi) 26
TOF+ 243694 Base Seal 240 V / 8 241 bar, 24 MPa (3500 psi) 10 bar, 1 MPa (150 psi) 28
TOF 200 297266 Snuff Back Swirl 240 V / 8 241 bar, 24 MPa (3500 psi) 10 bar, 1 MPa (150 psi) 30
TOF+ 243695 Base Seal H.F. 240 V / 8 241 bar, 24 MPa (3500 psi) 10 bar, 1 MPa (150 psi) 31
TOF+ 243696 Snuff Back 240 V / 8 241 bar, 24 MPa (3500 psi) 10 bar, 1 MPa (150 psi) 33
TOF C27340 Base Seal Ambient 241 bar, 24 MPa (3500 psi) 10 bar, 1 MPa (150 psi) 35
TOF C34068 Base Seal 120 V / 6 241 bar, 24 MPa (3500 psi) 10 bar, 1 MPa (150 psi) 37
TOF C34079 Base Seal 120 V / 6 241 bar, 24 MPa (3500 psi) 10 bar, 1 MPa (150 psi) 39
TOF C50592 Base Seal 120 V / 6 241 bar, 24 MPa (3500 psi) 10 bar, 1 MPa (150 psi) 41
Part
No. Type
918512 Snuff Back Ambient 241 bar, 24 MPa (3500 psi) 10 bar, 1 MPa (150 psi) 24
Voltage /
No. of Pins
Maximum Fluid Working
Pressure
Maximum Air Input
Pressure
Parts
Page
2 310538
Warnings
The following Warnings are for the safe setup, use, grounding, maintenance, and repair of this equipment. The
exclamation point symbol alerts you to a general warning and the hazard symbols refer to procedure–specific risks.
Refer back to these Warnings. Additional product–specific warnings may be found throughout the body of this
manual where applicable.
WARNING
EQUIPMENT MISUSE HAZARD
Equipment misuse can cause the equipment to rupture, malfunction, or start unexpectedly and
INSTRUCTIONS
result in serious injury.
D This equipment is for professional use only.
D Read all instruction manuals, warnings, tags, and labels before operating the equipment.
D Use the equipment only for its intended purpose. If you are uncertain, call your Graco distribu-
tor.
D Do not alter or modify this equipment. Use only genuine Graco parts and accessories.
D Check the equipment daily. Repair or replace worn or damaged parts immediately.
D Do not exceed the maximum air working pressure of 1 MPa (10 bar, 150 psi) to the applicator.
D Do not exceed the maximum fluid working pressure of 24 MPa (241 bar, 3500 psi) to the
applicator or manifold.
D Never exceed the recommended working pressure or the maximum air inlet pressure stated on
your pump or in the Technical Data on page 47.
D Be sure that all spray/dispensing equipment and accessories are rated to withstand the maxi-
mum working pressure of the pump. Do not exceed the maximum working pressure of any
component or accessory used in the system.
D Route hoses away from traffic areas, sharp edges, moving parts, and hot surfaces.
D Do not expose Graco standard hoses to temperatures above 180_F (82_C) or below –40_F
(–40_C). Do not expose Graco electrically heated hoses to temperatures above 400° F
(222° C) or below –40_F (–40_C).
D Do not expose Graco standard hoses to temperatures above 180_F (82_C) or below –40_F
(–40_C).
D Do not use the hoses to pull the equipment.
D Use only fluids and solvents that are compatible with the equipment wetted parts. See the
Technical Data sections of all the equipment manuals. Read the fluid manufacturer’s warnings.
D Always wear protective eyewear, gloves, clothing, and respirator as recommended by the fluid
and solvent manufacturers.
D Wear hearing protection when operating this equipment.
D Comply with all applicable local, state and national fire, electrical and other safety regulations.
310538 3
WARNING
HOT SURFACE AND FLUID HAZARD
Heated fluid can cause severe burns and can cause equipment surfaces to become very hot.
D Wear protective gloves and clothing when operating this equipment in a heated system.
D Do not touch the metal heat sink when the surface is hot.
D Allow the equipment to cool thoroughly before servicing.
Some heated systems are designed to dispense Polyurethane (PUR) heated materials. PUR
systems are supplied with ventilation hoods, and require proper ventilation and specially designed
system components.
SKIN INJECTION HAZARD
Spray from the applicator, hose leaks, or ruptured components can inject fluid into your body and
cause extremely serious injury, including the need for amputation. Fluid splashed in the eyes or on
the skin can also cause serious injury.
D Fluid injected into the skin might look like just a cut, but it is a serious injury. Get immediate
surgical treatment.
D Do not point the applicator at anyone or at any part of the body.
D Do not put hand or fingers over the front of the applicator.
D Do not stop or deflect fluid leaks with your hand, body, glove, or rag.
D Follow the Pressure Relief Procedure on page 11 whenever you are instructed to: relieve
pressure; stop dispensing; clean, check, or service the equipment; or install or clean a tip or
nozzle.
D Tighten all the fluid connections before operating the equipment.
D Check the hoses, tubes, and couplings daily. Replace worn, damaged, or loose parts immedi-
ately. Permanently coupled hoses cannot be repaired; replace the entire hose.
D ALWAYS wear eye protection and protective clothing when installing, operating, or servicing this
dispensing equipment.
D Do not remove or modify any part of the applicator; this can cause a malfunction and result in
serious bodily injury.
D Use extreme caution when cleaning or changing tips. If the tip clogs while applying material,
ALWAYS follow the Pressure Relief Procedure on page 11, then remove the tip to clean it.
D NEVER wipe off build-up around the tip or air cap until pressure is fully relieved.
4 310538
WARNING
FIRE, EXPLOSION, AND ELECTRIC SHOCK HAZARD
Improper grounding, poor air ventilation, open flames, or sparks can cause a hazardous condition
and result in fire or explosion and serious injury.
D Ground the equipment and the object being sprayed. The Automatic Dispense Valve is
grounded through proper connection of pin E inside the electrical control panel to truth earth
ground inside the electrical control panel. See Grounding on page 9.
D Ground the equipment and the object being sprayed, and all other electrically conductive
objects in the dispense area. Proper grounding dissipates static electricity generated in the
equipment. See Grounding on page 9.
D Do not use this equipment with flammable liquids.
D Keep the dispense area free of debris, including solvent, rags, and gasoline.
D If there is any static sparking or you feel an electric shock while using the equipment, stop dis-
pensing immediately. Do not use the equipment until you have identified and corrected the
problem.
D Make sure all electrical work is performed by a qualified electrician only.
D Have any checks, installation, or service to electrical equipment performed by a qualified electri-
cian only.
D Make sure all electrical equipment is installed and operated in compliance with applicable
codes.
D Make sure power is disconnected when servicing and repairing equipment.
D Before operating the equipment, extinguish all open flames or pilot lights in the dispense area.
D Do not smoke in the dispensing area.
D Keep liquids away from the electrical components
D Disconnect electrical power at the main switch before servicing the equipment.
D Never exceed maximum wattage of the supply unit.
TOXIC FLUID HAZARD
Hazardous fluids or toxic fumes can cause serious injury or death if splashed in the eyes or on the
skin, swallowed, or inhaled.
D Provide fresh air ventilation to avoid the buildup of vapors from the fluid being dispensed.
D Know the specific hazards of the fluid you are using.
D Store hazardous fluid in an approved container. Dispose of hazardous fluid according to all
local, state and national guidelines.
D Always wear protective eyewear, gloves, clothing and respirator as recommended by the fluid
and solvent manufacturer.
D Avoid exposure to heated material fumes.
310538 5
Installation
Install the automatic applicator as follows:
D mount the automatic dispense valve
D attach dispense tip, nozzle, or swirl
D connect the air lines
D connect material hose
D connect the electrical cable
D make sure the automatic dispense valve is
grounded
Mount the Automatic Dispense Valve
Mount the automatic dispense valve to the mounting
bracket on a stationary support or robotic arm (Fig. 1),
using two socket head screws (300) and two flat
washers (50). Be sure to position the insulation
block (280) and insulation tape (290) between the
dispense valve and the mounting bracket.
280
Attach Dispense Tip, Nozzle, or Swirl
Attach a dispense tip and a nozzle adapter, or a nozzle
adapter alone, to the automatic dispense valve.
Dispense Tip and Nozzle Adapter Attachment
Attach dispense tip (B) to the automatic dispense
valve.
1. Select a nozzle adapter (C) and a dispensing
tip (B).
2. Install the tip and then use the nozzle adapter (C)
to secure the tip to the seat adapter (D).
50
300
Fig. 1
290
D
A
Fig. 2
B
C
6 310538
Installation
Nozzle Attachment
Attach a nozzle (C) to the automatic dispense valve.
1. Select a nozzle.
2. Install nozzle adapter (C) on the seat adapter (D).
3. Install nozzle in nozzle adapter (E).
D
C
E
Fig. 3
Swirl Nozzle Attachment
1. Install swirl adapter (C) on seat adapter (D).
2. Install swirl applicator head (E).
3. Install swirl nozzle (F).
D
C
E
F
Fig. 4
310538 7
Installation
Connect Air Lines to Dispense Valve
CAUTION
Only use air fittings that are rated at a temperature
equal to or higher than the operating temperature of
your fluid dispensing system. Lower rated air fittings could melt and cause damage to the automatic dispense valve.
These valves are air to open and air to close with a
spring to bias them closed. Use a 4–way exhausting
solenoid to operate these valves.
Making sure to connect the appropriate air lines to the
appropriate ports (see Fig. 5), securely connect air
lines to dispense valve air ports (G).
1/8” npt
open
360
G
close
1/8” npt
Connect Material Hose to Dispense Valve
Securely connect the material hose to the dispense
valve material inlet port (A). See Fig. 5.
Connecting Electrical Cable to Dispense
Valve
Connect electrical cable plug from your Therm–O–
Flow or Therm–O–Flow Plus hose or control.
A
1/2” npt
Fig. 5
Snuff–Back Valve Shown
8 310538
Installation
Grounding
WARNING
FIRE, EXPLOSION, AND ELECTRIC
SHOCK HAZARD
To reduce the risk of fire, explosion, or
electric shock:
D The power source conduit is not an ad-
equate ground for the system. The unit
must be grounded to either the building
ground or a true earth ground.
D A qualified electrician must complete
all grounding and wiring connections
and check the resistance.
D Refer to your local code for the requirements for
a “true earth ground” in your area.
D Also read and follow the warnings on page 5.
Ground the automatic dispense valve:
1. Connect the connector from a heated hose to the
receptacle on the dispense valve.
Ground lead
coming from pin
E is fastened to
the bracket.
D
C
E
B
F
A
Fig. 6
3
5412
67
Ground lead
coming from contact 8 to true
earth ground.
Fig. 7
TI0305
2. Connect the electrical cable to the electrical control
panel.
3. Verify that socket contact E on six pin models (see
Fig. 5) or contact eight on eight pin models (see
Fig. 7) , inside control panel receptacle, is connected to true earth ground.
310538 9
Some solutions require disassembling the automatic dispense valve. Always relieve system pressure before per-
retaining ring (170)
forming these procedures.
See PARTS section for the parts that need to be serviced.
Problem Cause(s) Solution(s)
Air leaks from automatic dispense valve
Material leaks from front of
automatic dispense valve
Material leaks from automatic
dispense valve body
Automatic dispense valve
does not shut off
Automatic dispense valve
does not shut off
Automatic dispense valve
does not shut off
Automatic dispense valve
does not heat material
10 310538
Troubleshooting
WARNING
To reduce the risk of serious injury whenever you are instructed to relieve pressure, always follow
the Pressure Relief Procedure (page 11).
Loose air connections Check air connections.
Worn o-rings Replace o-rings (90) and (100) in cylin-
der base.
Worn ring Replace ring (110) in cylinder base.
Seal, spacer or retaining ring is worn Replace rod seal (150), spacer (160),
and retaining ring (170).
Obstruction inside dispense valve Remove seat adapter (10). Check and
replace if necessary, rod seal (150),
spacer (160), and retaining ring (170).
Worn needle Check and replace needle (140), if
necessary.If replacing needle, you must
disassemble dispense valve.
Worn seat (Base seal models) Check and replace seat (10) if neces-
sary.
Seal not installed correctly Check seal (70) and replace if necesSeal is worn
Loose air connections Check air connections.
Worn needle-seal interface Check and replace, if necessary, needle
Worn spring-piston interface Disassemble dispense valve. Check
Spring broken or not installed correctly Disassemble dispense valve. Check
Loose heater wires Check and reconnect wire connections.
Loose sensor wires Check and reconnect wire connections.
Heater unit failed Replace heater. See page 17.
Sensor failed Replace sensor. See page 17.
Temperature controller failed Replace temperature controller.
No power to heating circuitry Apply power to heating circuitry.
sary.
(140), rod seal (150), spacer (160), and
.
If replacing needle, you must disas-
semble dispense valve
and replace, if necessary, needle (140),
and spring (370).
and replace, if necessary, needle (140),
and spring (370).
Service
Pressure Relief Procedure
WARNING
HOT SURFACE AND FLUID HAZARD
The material and equipment will be
hot! To reduce risk of injury, wear eye
protection, gloves and protective clothing
when installing, operating, or servicing
this dispensing system.
SKIN INJECTION HAZARD
The system pressure must be manually
relieved to prevent the system from
starting or spraying accidentally. Fluid
under high pressure can be injected
through the skin and cause serious
injury. To reduce the risk of an injury
from injection, splashing fluid, or moving
parts, follow the Pressure Relief
Procedure whenever you:
D are instructed to relieve the pressure
D stop spraying/dispensing
D install or clean the nozzle
D check or service any of the system
equipment
This procedure describes how to relieve pressure from
the automatic dispense valve. See your supply unit or
system documentation for instructions on relieving
pressure for the entire dispensing system. Use this
procedure whenever you shut off the dispense valve
and before checking or adjusting any part of the
system, to reduce the risk of serious injury.
1. Shut off the material supply.
2. Shut off electrical power to the automatic dispense
valve.
3. Close all self bleeding air supply valves for supply
unit.
4. Have a container ready to catch the drainage, then
bleed off material pressure by actuating the dispense valve.
5. Shut off air supply to valve.
NOTE: If you suspect that the nozzle or hose is
completely clogged, or that pressure has not
been fully relieved after following the steps
above, very slowly loosen the tip guard,
retaining nut or hose end coupling to relieve
pressure gradually, then loosen completely. Then
clear the tip/nozzle or hose.
PRESSURIZED FLUID HAZARD
High pressures can cause serious personal injury. Be sure to open the dis-
pense valve during system heat-up to
alleviate pressure which might occur in
the system due to material expansion.
310538 11
Service
Prepare to Service Automatic
Dispense Valve
If the unit is hot, determine whether or not you can
service the unit after it has cooled down. Some materials, like polyurethanes, may cure permanently when
cooled and exposed to air, preventing you from disassembling the dispense valve. If you are working with
such a material, service the unit while the material is at
a temperature where the material is soft enough to
work with. If the material can be reheated at a later
time, you can service the unit after it has cooled,
reheating the material as necessary.
Perform this procedure before servicing the automatic
dispense valve.
1. Relieve the system pressure.
WARNING
To reduce the risk of serious injury, whenever you
are instructed to relieve pressure, always follow the
Pressure Relief Procedure (page 11).
2. Make sure material flow has been shut off.
3. Make sure system air has been shut off.
4. Remove power from the automatic dispense valve.
WARNING
HOT SURFACE AND FLUID HAZARD
The material and equipment will be
hot! To reduce risk of injury, wear eye
protection, gloves and protective clothing
when servicing this dispensing system
component.
5. If the material in the dispense valve can be reheated, wait for the dispense valve to cool thoroughly before servicing it.
If the material in the dispense valve cures permanently when cooled and/or exposed to air, service
the unit while the material is at a temperature
where the material is soft enough to work with.
12 310538
Service
Service the Automatic Dispense Valve
Some dispense valve seals and o-rings can be replaced while the dispense valve is still mounted.
However, to replace the needle, you must remove the
automatic dispense valve from the mounting bracket
and disassemble it.
Prior to installation, lubricate all seals and o-rings with
115982 Graco thermal lubricant (3 oz. cartridge) or an
equivalent lubricant. Check with the material supplier
for a compatible lubricant.
50
300
A
Disconnect Automatic Dispense Valve from
Mounting Bracket
Remove the automatic dispense valve from its mounting bracket.
1. Perform the procedures in Prepare to Service
Automatic Dispense Valve on page 12.
WARNING
HOT SURFACE AND FLUID HAZARD
The material and equipment may be
hot! To reduce risk of injury, wear eye
protection, gloves and protective clothing
when servicing this dispensing system
component.
2. Disconnect the cable plug from receptacle on
dispense valve (H). See Fig. 8 on page 13.
3. Disconnect air lines from dispense valve air
ports (G).
Fig. 8
4. Disconnect material hose from material inlet
port (A).
5. Separate the dispense valve body from the temperature conditioning manifold if used:
Reconnect Automatic Dispense Valve to Mounting
G
Snuff–Back Valve Shown
H
Bracket
Reconnect the automatic dispense valve to its mounting bracket. See Fig. 8.
1. Reconnect air lines to dispense valve air ports (G).
2. Reconnect the electrical cable plug to the receptacle (H).
3. Reconnect the material hose to the dispense valve
material inlet port (A).
310538 13
Service
Disassemble Automatic Dispense Valve
310
370
240
70
A
140
30
Fig. 9
To disassemble the automatic dispense valve:
1. Relieve automatic dispense valve pressure.
Snuff–Back Valve Shown
200
210
190
260
250
90
390
230
3. Remove the cable plug from the automatic dispense valve.
a. Remove the two screws (230) from the con-
nector cover. Then remove the connector
cover.
b. Remove the two socket head screws [Fig. 9,
Item (200)], two washers (210).The heater
cartridge (270) and
sensor (320) will come out of the dispense
valve body (Fig. 15).
4. Remove the four socket head screws (310) and
pull cylinder cap (260) and cylinder base (240)
from the dispense valve body (190). The needle
and piston remain with the cap and base.
5. Remove cap from base.
6. Remove needle from either the cap or the base
(depending on which piece it went with.) When the
needle is separated from the base, the closure
spring (370) falls out.
7. Using an o-ring pick, remove dispense valve body
seal (70).
WARNING
To reduce the risk of serious injury whenever you
are instructed to relieve pressure, always follow the
Pressure Relief Procedure (page 11).
2. Make sure you have removed the dispense valve
from its mounting.
14 310538
Service
8. Disassemble adapter assembly (Fig. 10):
a. Unscrew nozzle adapter (C).
b. Remove three socket head screws (30 in
Fig. 9).
c. Remove seat adapter (10). Contains seat on
base seal valves.
d. Remove retaining ring (170) from adapter seat
(Fig. 10). Not on base seal guns.
e. Remove seal (150) and spacer (160) from
adapter seat (Fig. 10). Not on base seal guns.
f. Remove o-ring (20) from adapter seat.
70
20
160
150
C
170
Reassemble Automatic Dispense Valve
Prior to installation, lubricate all seals and o-rings with
115982 Graco high temperature grease (3 oz. cartridge), or an equivalent lubricant. Check with the
material supplier for a compatible lubricant.
To reassemble the automatic dispense valve:
1. Make sure all parts are free of solid material
residue.
2. Reassemble adapter assembly (Fig. 10):
a. Lubricate and replace o-ring (20).
b. Lubricate and replace seal (150) and spacer
(160). Make sure the seal energizer faces
toward the material pressure.
c. Replace retaining ring (170).
d. Replace seat retainer (10).
e. Insert and tighten three socket head screws
(30 in Fig. 9).
f. Screw on nozzle adapter (C).
Fig. 10
10
Snuff–Back Valve Shown
3. Lubricate then replace dispense valve body
seal (70). Make sure the seal energizer faces
toward the material pressure.
310538 15
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