Graco Pneumatic PD44 Instructions Manual
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Graco Pneumatic PD44 Instructions Manual

Graco Pneumatic PD44 Instructions Manual

Meter, mix and dispense valve for precise two-component micro-dispensing of sealants and adhesives
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Instructions
Pneumatic PD44
Meter, mix and dispense valve for precise two-component micro-dispensing of sealants
and adhesives. For professional use only.
Important Safety Instructions
Read all warnings and instructions in this
manual. Save these instructions.
See page 3 for model information includ-
ing maximum working pressures.
80
psi
PUMP AIR PRESSURE
PUMP MODE
SHOT
EXTEND
CONT.
Pump and Tank not shown
313904D
EN

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Summary of Contents for Graco Pneumatic PD44

  • Page 1 Instructions Pneumatic PD44 313904D Meter, mix and dispense valve for precise two-component micro-dispensing of sealants and adhesives. For professional use only. Important Safety Instructions Read all warnings and instructions in this manual. Save these instructions. See page 3 for model information includ- ing maximum working pressures.

  • Page 2: Table Of Contents

    Valve Mounting Diagram ....14 Graco Ohio Information ..... 36 Adjusting the Shot Size .

  • Page 3: Model

    Model Model Max Outlet Max Air Max Inlet Working Pressure Fluid Working Working psi (MPa, bar) Metering Valve Pressure Pressure Model psi (MPa, bar) psi (MPa, bar) Metal Sleeves Plastic Sleeves 2000 (14, 138) 100 (0.7, 7) 1200 (8, 83) 400 (2.8, 28) Micrometer Warnings...
  • Page 4 Warnings WARNING EQUIPMENT MISUSE HAZARD Misuse can cause death or serious injury. • Do not operate the unit when fatigued or under the influence of drugs or alcohol. • Do not exceed the maximum working pressure or temperature rating of the lowest rated system component.

  • Page 5: Isocyanate Conditions

    • Keep the ISO lube pump reservoir (if installed) filled atomized particulates. with Graco Throat Seal Liquid (TSL), Part 206995. The lubricant creates a barrier between the ISO and Read material manufacturer’s warnings and material the atmosphere.

  • 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 Other Features Emergency Stop Foot Switch Air Pressure Gauge 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 10: Typical Feed System Components

    Component Identification Typical Feed System Components 5 Gallon Pail Cover 5 Gallon Pail Cover with Diaphragm with Diaphragm Pump Pump and Agitator 20 oz Cartridge Feed with Mounting Post 1 Gallon Ram and Pump WARNING DO NOT SERVICE WITHOUT REMOVING AIR PRESSURE AND WEARING SAFETY GLASSES.
  • Page 11 Component Identification Typical Feed System Components (continued) 5 Gallon Tank with Diaphragm Pump and Stand 5 Gallon Tank with 5:1 Pump and Stand 10 Gallon Tank with Diaphragm Pump, Agitator, 10 Gallon Tank with 5:1 Pump, Agitator, Vacuum, Vacuum, and Stand and Stand 313904D...

  • Page 12: Micrometer Pd44 Metering Valve

    Component Identification Micrometer PD44 Metering Valve Side View Front View Key: A Material Inlet Extend Air Flow Adjustment B Material Inlet Knob Grounding Lug Retract Air Flow Adjustment Spool Assemblies Knob Metering Rods Retract Switch Oil Cup Retaining Block Extend Switch Extend Air Inlet Spool Valve Switch Retract Air Inlet...

  • Page 13: Setup

    Setup Setup NOTE: See Typical Installation diagram. 3. Connect each 1/4 in. outside diameter supplied air line to the corresponding control solenoid. See 1. Perform Setup procedure for feed system compo- Component Identification starting on page 9. nents. See feed system manuals. See Related Manuals on page 2.

  • Page 14: Valve Mounting Diagram

    Setup Valve Mounting Diagram As desired, use the following diagram to mount the metering valve. Front of Metering Valve 1.75 4X 10-24 X 0.5 DP 0.563 0.38 0.862 1.06 0.75 C 4X Ø 0.188 1.50 DOWEL PINS 0.190 1.63 3.25 3.75 Bottom View (Spool Assembly Not Shown)

  • Page 15: Adjusting The Shot Size

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

  • Page 16: Ratio Check

    Ratio Check Ratio Check Perform ratio check procedure at startup and after 8. Subtract weight of empty cups from weight of filled rebuild. cups to get material weights. 9. Complete ratio calculations. 1. Weigh six small cups and label as indicated. Record weights.

  • Page 17: Operation

    Operation Operation Sequence of Operation Step 3: Dispense Step 1: Reload • Metering rods extend • A and B materials are simultaneously dispensed from the metering chamber into the disposable • Spools shift to the right. mixer. • Material feed inlets are opened •...

  • Page 18: Startup

    Startup Startup 1. Fill the spool valve ports with compatible lubricant. 5. Dispense several full stroke shots until material is Consult with your material supplier to select an air-free and has good shut-off at the nose. acceptable lubricant. Regularly verify that lubricant NOTE: Very viscous, compressible materials may con- is present.

  • Page 19: Pressure Relief Procedure

    4. Dispense 5 shots. Shots should be at least 75% of the full stroke. 5. Extend the metering rods into the tubes. If Graco controls are provided with the system, see the PD44 Controls manual. See Related Manuals on page 2.

  • Page 20: Maintenance

    Maintenance Maintenance Perform the following procedures once a shift or as required. NOTE: If material is leaking, see Troubleshooting on page 22. 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 21: 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 22: Troubleshooting

    Troubleshooting Troubleshooting Perform Pressure Relief Procedure before perform- ing any troubleshooting procedure. Problem Cause Solution Metering valve stalling and no mate- Blocked mixer Check mixer for cured material, rial being dispensed despite ade- replace mixer as required quate input pressure Flow control valve closed Open Metering valve not discharging nor-...

  • Page 23: Rebuild

    Rebuild Rebuild 7. Once the metering rod plate is in position, manually Wetted Section Disassembly move connecting block up. Rods will remain in posi- tion and connecting block is separated from rods. 1. Perform Pressure Relief Procedure, page 19. 2. Mark and disconnect all material feed lines and pneumatic lines.
  • Page 24 Rebuild 10. Remove the four cap screws located at the top of 13. Remove the two metering rods and tubes. Always the oil cup retaining block. keep rods and tubes together as they are a matched set. Oil Cup Retaining Block Tube 14.

  • Page 25: Wetted Section Reassembly

    Rebuild 4. Install drive assembly to the guides. Wetted Section Reassembly 1. Install the pneumatic spool rod drive. Torque fasten- ers to 67-70 in-lb (7.5-7.9 N•m). Micrometer PD44 shown 5. Attach the front plate to the serial number side of the metering body.

  • Page 26: Spool Valve Rebuild

    Rebuild 11. Manually move connecting block up and down to Spool Valve Rebuild insure rods are properly installed. 12. Install the back plate and cap screws. Back Plate 1. Perform Wetted Section Disassembly, page 23. 2. Remove the two cap screws. Cap Screws Cap Screws 13.

  • Page 27: Wetted Section Rebuild

    Rebuild 6. Insert new o-ring into spool air cylinder end cap. 2. Remove spool rods and sleeves from the metering block. 7. Install switch. 8. Apply Krytox or compatible lubricant to cylinder. 9. Insert piston into cylinder with the u-cup lip pointed in the direction of the tapered end of the cylinder.
  • Page 28 Rebuild 6. For each pneumatic drive spool block, install new NOTE: Correct orientation of seals shown. zap seals and o-rings onto o-ring retainer. Low Viscosity Spool Sleeve Seals Low Viscosity Spool High Viscosity Spool Sleeve Cutout View 11. Carefully install the spool sleeves into the metering block.
  • Page 29 Rebuild 12. Apply Krytox to spool rod then carefully install the 17. Install the wetcup sleeve onto the metering sleeve. spool rod into the spool sleeve (inside the metering block). Make sure not to cut the spool sleeve zap seals (on low viscosity spools). Wetcup Sleeve 18.

  • Page 30: Micrometer Drive Rebuild

    Rebuild 5. Slide the pneumatic drive piston off the drive rod. Micrometer Drive Rebuild 1. Perform Wetted Section Disassembly, page 23. 2. Remove the four cap screws located at the top of the pneumatic drive assembly. Cap Screws 6. Slide the air cylinder mounting block off the drive rod.
  • Page 31 Rebuild 9. Install new posipak seal with the o-ring pointed 13. Slide the drive rod into the closed slot in the piston. towards the drive piston, then install washer and retaining ring. 14. Install the cylinder o-ring then, careful not to cut the piston seal, install the drive rod into the block.

  • Page 32: Accessories

    Accessories Accessories Mixer Kits with Shroud Part Description 964034 Mixer, Kit, 3/16 in. (4.8mm) x 24, 10 taper tip mixers with shroud 964032 Mixer, Kit, 3/16 in. (4.8mm) x 32, 10 taper tip mixers with shroud 964028 Mixer, Kit, 3/16 in. (4.8mm) x 32, 10 Luer Lock tip mixers with shroud/sleeve 964033 Mixer, Kit, 1/4 in.
  • Page 33 Accessories O-Rings and Seals Part Description Part Description 16B286 Seal, Posipack, 4.50, ZAP 24E247 Kit, O-ring, chemical resistant, PD44 16B287 Seal, Posipack, 4.63, ZAP 24E248 Kit, Seal, Spool, H.V., PD44 16B288 Seal, Posipack, 4.75, ZAP 24E249 Kit, Seal, Spool, L.V., PD44 16B289 Seal, Posipack, 4.88, ZAP 16B265...
  • Page 34 Accessories 313904D...

  • Page 35: Technical Data

    Wetted Parts........PD44 Metering Valve: Hardened steel, 303/304, 404, UHMWPE, Tungsten, carbide, fluoroelastomer, EPDM, PTFE Graco-supplied Feed System Hoses and Fittings: Mild steel, 303/304, PTFE, buna, polyethylene, polypropyl- Graco-supplied Tanks: Polyethylene, 303/304, mild steel Sound data measured per standard ISO 11202 (1993) &...

  • Page 36: 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.

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