Graco Therm-O-Flow Series Operation manual

310538N
EN
Instructions-Parts List
Therm-O-Flow®
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.
Model 918483 Shown

Table of Contents
2310538N
Table of Contents
List of Models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Technical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Graco Standard Warranty . . . . . . . . . . . . . . . . . . . 48
Graco Information. . . . . . . . . . . . . . . . . . . . . . . . . . 48
List of Models
Valve
Type
Part
No. Type
Voltage /
No. of Pins
Maximum Fluid Working
Pressure
Maximum Air Input
Pressure
Parts
Page
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
918512 Snuff Back Ambient 241 bar, 24 MPa (3500 psi) 10 bar, 1 MPa (150 psi) 24
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

Warnings
310538N 3
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
result in serious injury.
• This equipment is for professional use only.
• Read all instruction manuals, warnings, tags, and labels before operating the equipment.
• Use the equipment only for its intended purpose. If you are uncertain, call your Graco distributor.
• Do not alter or modify this equipment. Use only genuine Graco parts and accessories.
• Check the equipment daily. Repair or replace worn or damaged parts immediately.
• Do not exceed the maximum air working pressure of 1 MPa (10 bar, 150 psi) to the applicator.
• Do not exceed the maximum fluid working pressure of 24 MPa (241 bar, 3500 psi) to the applicator or
manifold.
• Never exceed the recommended working pressure or the maximum air inlet pressure stated on your
pump or in the Technical Data on page 47.
• Be sure that all spray/dispensing equipment and accessories are rated to withstand the maximum
working pressure of the pump. Do not exceed the maximum working pressure of any component or
accessory used in the system.
• Route hoses away from traffic areas, sharp edges, moving parts, and hot surfaces.
• Do not expose Graco standard hoses to temperatures above 180F (82C) or below –40F (–40C). Do
not expose Graco electrically heated hoses to temperatures above 400F (222C) or below –40F
(–40C).
• Do not expose Graco standard hoses to temperatures above 180F (82C) or below –40F (–40C).
• Do not use the hoses to pull the equipment.
• 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.
• Always wear protective eyewear, gloves, clothing, and respirator as recommended by the fluid and
solvent manufacturers.
• Wear hearing protection when operating this equipment.
• Comply with all applicable local, state and national fire, electrical and other safety regulations.
INSTRUCTIONS

Warnings
4310538N
WARNING
HOT SURFACE AND FLUID HAZARD
Heated fluid can cause severe burns and can cause equipment surfaces to become very hot.
• Wear protective gloves and clothing when operating this equipment in a heated system.
• Do not touch the metal heat sink when the surface is hot.
• 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.
• Fluid injected into the skin might look like just a cut, but it is a serious injury. Get immediate surgi-
cal treatment.
• Do not point the applicator at anyone or at any part of the body.
• Do not put hand or fingers over the front of the applicator.
• Do not stop or deflect fluid leaks with your hand, body, glove, or rag.
• 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.
• Tighten all the fluid connections before operating the equipment.
• Check the hoses, tubes, and couplings daily. Replace worn, damaged, or loose parts immediately.
Permanently coupled hoses cannot be repaired; replace the entire hose.
• ALWAYS wear eye protection and protective clothing when installing, operating, or servicing this dis-
pensing equipment.
• Do not remove or modify any part of the applicator; this can cause a malfunction and result in serious
bodily injury.
• 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.
• NEVER wipe off build-up around the tip or air cap until pressure is fully relieved.

Warnings
310538N 5
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.
• 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.
• 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.
• Do not use this equipment with flammable liquids.
• Keep the dispense area free of debris, including solvent, rags, and gasoline.
• If there is any static sparking or you feel an electric shock while using the equipment, stop dispens-
ing immediately. Do not use the equipment until you have identified and corrected the problem.
• Make sure all electrical work is performed by a qualified electrician only.
• Have any checks, installation, or service to electrical equipment performed by a qualified electrician
only.
• Make sure all electrical equipment is installed and operated in compliance with applicable codes.
• Make sure power is disconnected when servicing and repairing equipment.
• Before operating the equipment, extinguish all open flames or pilot lights in the dispense area.
• Do not smoke in the dispensing area.
• Keep liquids away from the electrical components.
• Disconnect electrical power at the main switch before servicing the equipment.
• 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.
• Provide fresh air ventilation to avoid the buildup of vapors from the fluid being dispensed.
• Know the specific hazards of the fluid you are using.
• Store hazardous fluid in an approved container. Dispose of hazardous fluid according to all local,
state and national guidelines.
• Always wear protective eyewear, gloves, clothing and respirator as recommended by the fluid and
solvent manufacturer.
• Avoid exposure to heated material fumes.

Installation
6310538N
Installation
Install the automatic applicator as follows:
• mount the automatic dispense valve
• attach dispense tip, nozzle, or swirl
• connect the air lines
• connect material hose
• connect the electrical cable
• 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.
FIG. 1
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).
FIG. 2

Installation
310538N 7
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).
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).
FIG. 4

Installation
8310538N
Installation
Connect Air Lines to 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).
FIG. 5
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.
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.
Snuff-Back Valve Shown

Installation
310538N 9
Installation
Grounding Ground the automatic dispense valve:
1. Connect the connector from a heated hose to the
receptacle on the dispense valve.
FIG. 6
FIG. 7
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.
WARNING
FIRE, EXPLOSION, AND ELECTRIC
HAZARD
To reduce the risk of fire, explosion, or
electric shock:
• The power source conduit is not an ade-
quate ground for the system. The unit must
be grounded to either the building ground or
a true earth ground.
• A qualified electrician must complete all
grounding and wiring connections and check
the resistance.
• Refer to your local code for the require-
ments for a “true earth ground” in your area.
• Also read and follow the warnings on page
5.
Ground lead
coming from pin
E is fastened to
the bracket.
Ground lead
coming from con-
tact 8 to true
earth ground.

Troubleshooting
10 310538N
Troubleshooting
Some solutions require disassembling the automatic dispense valve. Always relieve system pressure before
performing these procedures.
See PARTS section for the parts that need to be serviced.
WARNING
To reduce the risk of serious injury whenever you are instructed to relieve pressure, always follow
the Pressure Relief Procedure (page 11).
Problem Cause(s) Solution(s)
Air leaks from automatic dispense
valve
Loose air connections Check air connections.
Worn o-rings Replace o-rings (90) and (100) in cylinder
base.
Worn ring Replace ring (110) in cylinder base.
Material leaks from front of
automatic dispense valve
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 necessary.
Material leaks from automatic dispense
valve body
Seal not installed correctly Check seal (70) and replace if necessary.
Seal is worn
Automatic dispense valve
does not shut off
Loose air connections Check air connections.
Worn needle-seal interface Check and replace, if necessary, needle
(140), rod seal (150), spacer (160), and
retaining ring (170).
If replacing needle, you must disassemble
dispense valve
Automatic dispense valve
does not shut off
Worn spring-piston interface Disassemble dispense valve. Check
and replace, if necessary, needle (140),
and spring (370).
Automatic dispense valve
does not shut off
Spring broken or not installed correctly Disassemble dispense valve. Check
and replace, if necessary, needle (140),
and spring (370).
Automatic dispense valve does not
heat material
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.

Service
310538N 11
Service
Pressure Relief Procedure 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 dis-
pense valve.
5. Shut off air supply to valve.
NOTE: If you suspect that the nozzle or hose is com-
pletely clogged, or that the 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.
WARNING
HOT SURFACE AND FLUID HAZARD
The material and equipment will be hot!
To reduce the 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:
• are instructed to relieve the pressure
• stop spraying/dispensing
• install or clean the nozzle
• check or service any of the system
equipment
PRESSURIZED FLUID HAZARD
High pressures can cause serious personal
injury. Be sure to open the dispense valve
during system heat-up to alleviate pres-
sure which might occur in the system due to
material expansion.

Service
12 310538N
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.
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.
5. If the material in the dispense valve can be
reheated, wait for the dispense valve to cool thor-
oughly before servicing it.
If the material in the dispense valve cures perma-
nently 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.
WARNING
To reduce the risk of serious injury, whenever you are
instructed to relieve pressure, always follow the
Pressure Relief Procedure (page 11).
WARNING
HOT SURFACE AND FLUID HAZARD
The material and equipment will be hot! To
reduce the risk of injury, wear eye protection,
gloves and protective clothing when
servicing this dispensing system component.

Service
310538N 13
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.
FIG. 8
Disconnect Automatic Dispense Valve from
Mounting Bracket
Remove the automatic dispense valve from its mounting
bracket.
1. Perform the procedures in Prepare to Service the
Automatic Dispense Valve on page 12.
2. Disconnect the cable plug from receptacle on dis-
pense valve (H). See FIG. 8 on page 13.
3. Disconnect air lines from dispense valve air ports
(G).
4. Disconnect material hose from material inlet port
(A).
5. Separate the dispense valve body from the tem-
perature conditioning manifold if used:
Reconnect Automatic Dispense Valve to
Mounting 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 recepta-
cle (H).
3. Reconnect the material hose to the dispense valve
material inlet port (A).
Snuff-Back Valve Shown
WARNING
HOT SURFACE AND FLUID HAZARD
The material and equipment may be hot!
To reduce the risk of injury, wear eye
protection, gloves and protective clothing
when servicing this dispensing system
component.

Service
14 310538N
Service
Disassemble Automatic Dispense Valve
FIG. 9
To disassemble the automatic dispense valve:
1. Relieve automatic dispense valve pressure.
2. Make sure you have removed the dispense valve
from its mounting.
3. Remove the cable plug from the automatic dispense
valve.
a. Remove the two screws (230) from the connec-
tor cover. Then remove the connector cover.
b. Remove the two socket head screws [FIG. 9,
Item (200)], two washers (210). The heater car-
tridge (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).
Snuff-Back Valve Shown

Service
310538N 15
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.
FIG. 10
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 resi-
due.
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).
3. Lubricate then replace dispense valve body seal
(70). Make sure the seal energizer faces toward the
material pressure.
Snuff-Back Valve Shown

Service
16 310538N
Service
4. Reassemble cap and base (FIG. 11):
a. Lubricate o-ring (100) and ring (110).
b. Insert o-ring (100) into needle piston (140)
groove.
c. Slide ring (110) on top of o-ring (100).
d. Lubricate, then replace o-rings (90) and (250).
Insert spring on base seal models (FIG. 12).
e. Insert needle assembly into cylinder cap (260).
f. Place spring (370) over shaft of needle/piston.
Seat spring in groove on piston face on snuff-
back models (FIG. 11).
g. Slide base (240), over the needle, into the cylin-
der cap (260). Seat spring (370) in groove on
base.
FIG. 11
FIG. 12
5. Reconnect the cable receptacle to the automatic
dispense valve. See FIG. 13.
a. Re-insert heater cartridge and sensor into their
appropriate holes.
b. Ensure the ground wire (380) is connected to
the bracket (330).
c. Connect the receptacle to the dispense valve
body. Then secure it with the two socket head
screws (200) and washers (210).
d. Reattach the receptacle cover. Then secure it
with the two screws (230).
FIG. 13
Snuff-Back Valve Shown
Base Seal Valves

Service
310538N 17
Service
Replace Heater Unit or Sensor
You can replace the automatic dispense valve heater
unit or sensor without removing the automatic dispense
valve from its mounting bracket. You only have to
disconnect the cable connector from the automatic
dispense valve.
This procedure requires:
• soldering iron
•solder
• shrink wrap
• wire cutters
• heat sink compound, Graco part number C07664 or
equivalent. Check with the material supplier for a
compatible compound.
1. Perform the procedures in Prepare to Service
Automatic Dispense Valve on page 12.
2. Remove the cable receptacle from the automatic
dispense valve.
a. Remove the two screws from the connector
cover [FIG. 9, Item (230)] and remove the recep-
tacle cover.
b. Remove the two socket head screws [FIG. 14,
Item (200)], two washers (210). The heater car-
tridge (270) and sensor (320) will come out of
the dispense valve body.
FIG. 14
3. Remove old heater cartridge or sensor.
a. Locate the leads to the part you are replacing.
b. Remove the shrink wrap from the leads.
c. Unsolder the leads from the connector. Cut the
leads on 8 pin models, leaving enough to strip
and solder the leads.
4. Install new heater unit or sensor:
FIG. 15
FIG. 16
a. Install the shrink wrap over the leads.

Service
18 310538N
Service
b. Solder the leads to the appropriate connector
(FIG. 15) for 6 pin connector. For Therm–O–
Flow 8 pin assemblies, removal and replace-
ment of the heaters and RTD require a pin
extraction tool, new pins, and a pin crimping
tool. These tools meet spec MIL–C–22520 [Ref.
Daniels AF8 (crimp tool) or equivalent, available
at local electrical supply warehouse.
c. Coat heater or sensor with heat sink compound.
d. Gently slide new heater or sensor into appropri-
ate hole.
e. Either shrink the shrink wrap, or use electrical
tape to electrically insulate the connection
between the leads and connector pins.
5. Reconnect the dispense valve to the receptacle
(FIG. 14):
a. Reattach the receptacle base to the dispense
valve body and secure it with the two socket
head screws [FIG. 14, Items (200) and washer
(210)].
b. Reattach the receptacle cover to the Amphenol
connector base and secure the cover with the
screws.
Inspection Frequency
Automatic Dispense Valve
Inspect automatic dispense valve at least once every
two weeks for leakage or other visible damage.
Check specifically for:
• material leaks
• air leaks
Hoses/Tubes
Inspect hoses/tubes at least once every two weeks for
leakage or other visible damage.
• material hose
• air hoses
Heater
Every two weeks, check heater for proper resistance.
Resistance should be approximately 96 ohms for the
120 volt valves or 288 ohms (+30/–40) for the 240 volt
valves. Replace heater if necessary.
Also inspect heater when performing regular mainte-
nance procedures.
Sensor
Every two weeks, check sensor resistance. Resistance
should be 108 ohms at 21C (70F). Replace sensor if
necessary.
Also inspect sensor when performing regular mainte-
nance procedures.

Parts
310538N 19
Parts
Model 194485, Warm (275°F/135°C max) Automatic Dispense Valve with Snuff Back

Parts
20 310538N
Parts
Model 194485, Warm (275°F/135°C max) Automatic Dispense Valve with Snuff Back
* These parts are included in Repair Kit 194486, which
may be purchased separately.
 Keep these spare parts on hand to reduce down time.
Ref
No. Part No. Description Qty.
10 617479 ADAPTER, seat 1
20* 722834 O-RING, -018 flouroelastomer 1
30 C19800 SCREW, soc. hd. cap,
1/4” - 20 x 0.5
5
40 100016 WASHER, lock, 1/4” 2
50 111591 WASHER, flat, 1/4” 4
60 C34044 PLATE, blank-off 1
70* 551190 SEAL, Polymite 1
80 C34030 SPACER 4
90* 113944 O-RING, -125 flouroelastomer 1
100* 103649 O-RING, -123 flouroelastomer 1
110* C32088 RING 1
120 617495 SCREW, button head,
1/4” - 20 x 0.31
1
130* C20521 SEAL, thread 1
140918471 NEEDLE, piston 1
150* C54172 SEAL, rod, 0.25 x 0.50 x 0.25 1
160 617480 SPACER 1
170* C20406 RING, retaining, for 0.56 I.D. 1
180 C34045 SPACER 2
190 194527 BODY, gun 1
200 112166 SCREW, soc. hd. cap,
1/4” - 20 x 0.75
2
210 C19197 WASHER, flat, 3/16 2
220 C34040 COVER 1
230 C19269 SCREW, fill. hd. machine,
#4 - 40 x 0.25
2
240 617537 BASE, cylinder 1
250* 103337 O-RING, -010 fluoroelastomer 1
260 C34028 CAP, cylinder 1
270C31034 HEATER, cartridge 120V, 150W 1
280 C32099 BLOCK, mounting 1
290 C33037 TAPE, fiberglass,
0.5” wide (229 mm)
9”
300 C19810 SCREW, soc. hd. cap,
1/4” - 20 x 1
2
310 104594 SCREW, soc. hd. cap,
1/4” - 20 x 3.25
4
320C32255 SENSOR, RTD 1
330 C34043 BRACKET 1
340 102794 NUT, hex, #4 - 40 4
350 C19270 SCREW, fill. hd. machine,
#4 - 40 x 0.38
4
360 C07329 CONNECTOR, 6 pin 1
370* 617536 SPRING 1
380 065345 WIRE, high temp. (127 mm) 5”
390 101674 TERMINAL, ring 1
400 C07664 COMPOUND, heat sink A/R
460 112144 SCREW 1
510 157021 WASHER, lock 1
Ref
No. Part No. Description Qty.