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Graco Dispensit 1093 [5/24] Isocyanate conditions
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Isocyanate Conditions
332089B 5
Isocyanate Conditions
Material Self-ignition
Moisture Sensitivity of
Isocyanates
ISO will react with moisture (such as humidity) to form
small, hard, abrasive crystals, which become sus-
pended in the fluid. Eventually a film will form on the sur-
face and the ISO will begin to gel, increasing in viscosity.
If used, this partially cured ISO will reduce performance
and the life of all wetted parts.
NOTE: The amount of film formation and rate of crystal-
lization varies depending on the blend of ISO, the
humidity, and the temperature.
To prevent exposing ISO to moisture:
• Always use a sealed container with a desiccant
dryer in the vent, or a nitrogen atmosphere. Never
store ISO in an open container.
• Keep the ISO lube pump reservoir (if installed) filled
with Graco Throat Seal Liquid (TSL), Part 206995.
The lubricant creates a barrier between the ISO and
the atmosphere.
• Use moisture-proof hoses specifically designed for
ISO, such as those supplied with your system.
• Never use reclaimed solvents, which may contain
moisture. Always keep solvent containers closed
when not in use.
• Always lubricate threaded parts with ISO pump oil
or grease when reassembling.
Changing Materials
• When changing materials, flush the equipment mul-
tiple times to ensure it is thoroughly clean.
• Always clean the fluid inlet strainers after flushing.
• Check with your material manufacturer for chemical
compatibility.
Spraying or dispensing materials containing isocya-
nates creates potentially har mful mists, vapors, and
atomized particulates.
Read material manufacturer’s warnings and material
MSDS to know specific hazards and precautions
related to isocyanates.
Prevent inhalation of isocyanate mists, vapors, and
atomized particulates by providing sufficient ventila-
tion in the work area. If sufficient ventilation is not
available, a supplied-air respirator is required for
everyone in the work area.
To prevent contact with isocyanates, appropriate per-
sonal protective equipment, including chemically
impermeable gloves, boots, aprons, and goggles, is
also required for everyone in the work area.
Some materials may become self-igniting if applied
too thickly. Read material manufacturer’s warnings
and material MSDS.
Содержание
- Dispensit 1092 1
- Operation maintenance 1
- Patented meter and dispense system for precise one component micro dispensing not for use in explosive atmospheres 1
- Contents 2
- Warning 3
- Warnings 3
- Warning 4
- Changing materials 5
- Isocyanate conditions 5
- Material self ignition 5
- Moisture sensitivity of isocyanates 5
- Grounding 6
- Overview 6
- Optional cycle detection sensors 7
- Suggested sequence of operation see page 16 7
- Component identification 8
- Controls 8
- Liquid control 8
- System shown with optional 4104a controls 8
- Top view of controls 8
- Typical system configurations 8
- Typical feed system components 9
- Typical feed system components continued 10
- Metering valve 11
- Typical installation 12
- As desired use the following diagram to mount the metering valve 13
- Valve mounting diagram 13
- Startup 14
- Adjusting the shot size 15
- Operation 16
- Sequence of operation 16
- Step 1 reload 16
- Step 2 shift 16
- Step 3 dispense 16
- Air dryer 17
- Maintenance 17
- Material reservoirs 17
- Metering rod port 17
- Pressure relief procedure 17
- Shutdown 17
- Spool valve port 17
- Schematics 18
- Troubleshooting 18
- Cutaway front view 19
- Cycle the valve a few times to remove residual material pressure 19
- Disassembly 19
- For models with cycle detection sensors discon nect the electrical power from the cycle detection sensors note the position of the sensors then remove them by loosening the set screws and slid ing them out carefully 19
- For part references in the following proce dure 19
- Material inlet port on side of block 19
- Material outlet needle not shown 19
- Rebuild 19
- Refer to 19
- Remove the air pressure lines from the air supply tee fittings 17 17 do not remove the fittings themselves 19
- Remove the dispense valve from its mounting 19
- Remove the material inlet line from the inlet block 19
- Turn off the air pressure to the 1092 19
- Turn off the material inlet pressure to the 1092 19
- Assembly 20
- Electrical requirements cycle detection option 22
- Technical data 23
- For the latest information about graco products visit www graco com 24
- Graco headquarters minneapolis international offices belgium china japan korea 24
- Graco inc and subsidiaries p o box 1441 minneapolis mn 55440 1441 usa copyright 2010 graco ohio inc all graco manufacturing locations are registered to iso 9001 www graco com revised january 2015 24
- Graco information 24
- Graco standard warranty 24
- To place an order contact your graco distributor or call to identify the nearest distributor toll free 1 800 746 1334 or fax 330 966 3006 24
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