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Graco Pneumatic PD44 Instructions Manual

Patented meter, mix and dispense valve for precise two-component micro-dispensing.
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Instructions
Pneumatic PD44
Patented meter, mix and dispense valve for precise two-component micro-dispensing.
SN8048, SN8049, SN8051,
SN8052, SN8053, SN8054
2200 psi (15 MPa, 152 bar) Maximum Outlet Fluid Working Pressure
100 psi (0.7 MPa, 7 bar) Maximum Air Working Pressure
Metal Sleeves: 1200 psi (8 MPa, 83 bar) Maximum Inlet Working Pressure
Plastic Sleeves: 400 psi (2.8 MPa, 28 bar) Maximum Inlet Working Pressure
Important Safety Instructions
Read all warnings and instructions in this manual.
Save these instructions.
80
psi
PUMP AIR PRESSURE
PUMP MODE
SHOT
EXTEND
CONT.
Pump and Tank not shown
313904B

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Summary of Contents for Graco Pneumatic PD44

  • Page 1 Instructions Pneumatic PD44 313904B Patented meter, mix and dispense valve for precise two-component micro-dispensing. SN8048, SN8049, SN8051, SN8052, SN8053, SN8054 2200 psi (15 MPa, 152 bar) Maximum Outlet Fluid Working Pressure 100 psi (0.7 MPa, 7 bar) Maximum Air Working Pressure Metal Sleeves: 1200 psi (8 MPa, 83 bar) Maximum Inlet Working Pressure Plastic Sleeves: 400 psi (2.8 MPa, 28 bar) Maximum Inlet Working Pressure...

  • Page 2: Table Of Contents

    Sequence of Operation ....14 Graco Ohio Information ..... 30 Startup .

  • Page 3: Warnings

    Warnings Warnings The following warnings are for the setup, use, grounding, maintenance, and repair of this equipment. The exclama- tion point symbol alerts you to a general warning and the hazard symbol refers to procedure-specific risk. Refer back to these warnings. Additional, product-specific warnings may be found throughout the body of this manual where applicable.
  • Page 4 Warnings WARNING MOVING PARTS HAZARD Moving parts can pinch or amputate fingers and other body parts. • Keep clear of moving parts. • Do not operate equipment with protective guards or covers removed. • Pressurized equipment can start without warning. Before checking, moving, or servicing equipment, follow the Pressure Relief Procedure in this manual.
  • Page 5 Warnings 313904B...

  • Page 6: Grounding

    Grounding Grounding To maintain grounding continuity when flushing or relieving pressure: hold metal part of the dispense valve firmly to the side of a grounded metal pail, then trigger the valve. The equipment must be grounded. Grounding reduces the risk of static and electric shock by providing an escape wire for the electrical current due to static build up or in the event of a short circuit.
  • Page 7 Grounding PosiDot Pumps and Tanks PosiDot Controls and Footswitches PosiDot Dispense Valves PUMP MODE PUMP AIR PRESSURE PUMP MODE PUMP AIR PRESSURE SHOT SHOT EXTEND CONT. EXTEND CONT. PUMP MODE PUMP AIR PRESSURE PUMP MODE PUMP AIR PRESSURE SHOT SHOT EXTEND CONT.

  • Page 8: Overview

    CAUTION: Due to the precise nature of the machine, we recommend you contact Graco before making major adjustments. Throughout this manual, references to the A side and B side are used. The A and B sides correspond to the par-...

  • Page 9: Component Identification

    Component Identification Component Identification Controls Dispense Valve Emergency Stop Air Pressure Gauge PUMP AIR PRESSURE PUMP MODE SHOT EXTEND CONT. Air Pressure Regulator Pump Mode Switch Pump Mode Switch EXTEND: The air cylinder and PosiDot rods will immedi- ately extend and remain in the extended position. This is the position that the valve should be in if idle for an extended period of time.

  • Page 10: Other Features

    Component Identification Other Features Foot Switch The foot switch is used to initiate a PosiDot cycle when operating in SHOT Mode. The foot switch is referred to as a Start device in this manual. When the SHOT Mode is selected and the start device is pressed and released, the PosiDot will cycle.

  • Page 11: Initial Startup

    Initial Startup Initial Startup NOTE: Some on-site assembly may be required prior to initial startup. See assembly drawings for more informa- tion. 1. Go through the Pre-Operation Checklist in the fol- lowing table. ✔ Checklist System Grounded Verify all grounding connections were made. See Grounding, page 6.

  • Page 12: Adjusting The Shot Size

    Adjusting the Shot Size Adjusting the Shot Size Follow these instructions to adjust the shot size of your 5. Turn clockwise the shot size locking ring to tighten. machine. Repeat this procedure every time an adjust- ment is required. 1. Set Pump Mode switch to EXTEND. The metering rods will extend down and stop.

  • Page 13: Ratio Check

    Ratio Check Ratio Check The Ratio Check is a simple procedure where individual 6. Place cups as indicated under ratio check nozzle samples of material are collected from each valve, and cycle machine once. weighed, and compared to the manufacturer’s desired outputs.

  • Page 14: Operation

    Operation Operation Step 3: Dispense Always add compatible lubricant such as mesamoll or silicone oil to the dispensing rod wet cups prior to opera- tion. Sequence of Operation Step 1: Reload • Metering rods extend • A and B materials are simultaneously dispensed from the metering chamber into the disposable mixer.

  • Page 15: Startup

    Startup Startup Shutdown See startup instructions and related warnings in sup- plied manuals. See Related Manuals on page 2. 1. Bleed air from machine. NOTE: Water contamination will dramatically shorten, if not end, pneumatic valve life. 1. Go through the Pre-Operation Checklist in the fol- lowing table.

  • Page 16: Maintenance

    Maintenance Maintenance Perform the following procedures once a shift or as required. NOTE: If material is leaking, see Troubleshooting on page 18. Material Reservoirs Check material levels and refill as necessary. Ensure that the material reservoirs are vented properly. (Dry Air, Nitrogen, etc.) Air Dryer Check the condition of the desiccant air dryer.

  • Page 17: Metering Rod Alignment

    Metering Rod Alignment Metering Rod Alignment Metering rod alignment must be completed whenever the metering rods are removed from the valve. 1. Disconnect the main air supply and bleed air from the machine by pushing the tube on the bottom of regulator.

  • Page 18: Troubleshooting

    Troubleshooting Troubleshooting Problem Cause Solution PosiDot stalling and no material Blocked mixer. Check mixer for cured material, being PosiDoted despite adequate replace mixer as required. input pressure. Flow control valve closed. Open. PosiDots not discharging normal or Low material level in reservoirs. Fill material reservoirs and prime the full volume.

  • Page 19: Rebuild

    Rebuild Rebuild NOTE: See assembly drawings for more information. 4. Once the material rod plate is in position, slide the material rod away from the retaining plate. Wetted Section Disassembly 1. Mark and disconnect all material feed lines, pneu- matic lines, and proximity switch wiring. Remove the dispense valve from mounts.

  • Page 20: Wetted Section Reassembly

    Rebuild 9. Remove the material rods and upper metering rod NOTE: Always keep rods and sleeves together as they block. are a matched set. 12. Remove the protruding cap screws on the each Upper Metering Rod Block spool block. Spool Block Cap Screws Material Rod 13.
  • Page 21 Rebuild 3. Install guide rods. 7. Attach the metering rod to the material rod retaining plate. Guide Rods 4. Install drive assembly to the guides. 8. Slide the material rod retaining plate to the locked position. Micrometer PD44 shown 5. Make sure the air inlet ports are pointed towards the Retaining Plate front plate and attach the front plate to the serial number side of the metering body.

  • Page 22: Spool Valve Rebuild

    Rebuild 10. Install material inlet blocks with new o-rings. Spool Valve Rebuild Material Inlet Block O-Ring 1. Remove the two cap screws. Cap Screws 11. Install material nose assembly with new o-rings. 2. Disassemble the spool cylinder. O-Rings Nose 12. Attach material line, pneumatic line, and electrical wiring.

  • Page 23: Wetted Section Rebuild

    Rebuild 6. Install proximity switch. 2. Remove spool rods and sleeves from the metering block. 7. Apply Krytox or compatible lubricant to cylinder. 8. Insert piston into cylinder with the u-cup lip pointed in the direction of the tapered end of the cylinder. The “U”...
  • Page 24 Rebuild 5. For each pneumatic drive spool block, install new NOTE: Typically, the spring in the zap seals point toward spool rod bearing, zap seals, and o-rings onto o-ring the center of the low viscosity spool sleeve. retainer. Low Viscosity Spool Sleeve Cutout View Low Viscosity Spool High Viscosity Spool Sleeve Cutout View 10.

  • Page 25: Micrometer Drive Rebuild (Micrometer Pd44 Only)

    Rebuild 11. Carefully install the spool rod into the spool sleeve 16. Install the wetcup sleeve onto the metering sleeve. (inside the metering block). Make sure not to cut the spool sleeve zap seals (on low viscosity spools). Wetcup Sleeve 12.
  • Page 26 Rebuild 2. Remove the drive top cap. 6. Install new seals on the drive piston. Make sure the lip of the seal points toward the pressure side of the drive. See the following illustration and the assembly Drive Top Cap drawings for more information.
  • Page 27 Rebuild 10. Careful not to cut the posipak seal, install drive rod 14. Install the upper cylinder o-ring. into the block. 15. Install top cap block to cylinder. 11. Install the drive rod into the piston. 16. Install drive housing bolts to the cylinder mounting block.
  • Page 28 Rebuild 313904B...

  • Page 29: Technical Data

    Technical Data Technical Data Maximum Ambient Temperature....110°F, 43°C Maximum Operating Temp ......150°F, 65°C Maximum Outlet Fluid Working Pressure .

  • Page 30: Graco Ohio Standard Warranty

    With the exception of any special, extended, or limited warranty published by Graco, Graco will, for a period of twelve months from the date of sale, repair or replace any part of the equipment determined by Graco to be defective.

This manual is also suitable for:

Sn8048Sn8049Sn8051Sn8052Sn8053Sn8054

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