1. Manuals
  2. Brands
  3. Graco Manuals
  4. Paint Sprayer
  5. EP 257999
  6. Instructions and parts manual

Graco 257999 Instructions And Parts Manual

Plural component, impingement mix, mechanical purge pour gun
Hide thumbs Also See for 257999:
Table of Contents

Advertisement

Quick Links

Download this manual
Instructions - Parts
™
EP
Gun
Plural Component, Impingement Mix, Mechanical Purge Pour Gun
For use with non-flammable foam in open pour applications. Not approved for use in
European explosive atmosphere locations.
Model 257999, 24C932
3000 psi (20.7 MPa, 207 bar) Maximum Fluid Working Pressure
80-100 psi (0.55-0.69 MPa, 5.5-6.9 bar) Air Inlet Pressure Range
180°F (82°C) Maximum Fluid Temperature
Important Safety Instructions
Read all warnings and instructions in this
manual. Save these instructions.
313872N
EN
ti19547a

Advertisement

Table of Contents
loading

Related Manuals for Graco 257999

Summary of Contents for Graco 257999

  • Page 1 For use with non-flammable foam in open pour applications. Not approved for use in European explosive atmosphere locations. Model 257999, 24C932 3000 psi (20.7 MPa, 207 bar) Maximum Fluid Working Pressure 80-100 psi (0.55-0.69 MPa, 5.5-6.9 bar) Air Inlet Pressure Range 180°F (82°C) Maximum Fluid Temperature...

  • Page 2: Table Of Contents

    Grease the Gun ......24 Graco Standard Warranty ....58 Flush Gun .

  • Page 3: Related Manuals

    Related Manuals Related Manuals Manuals are available at www.graco.com. Component manuals in U.S. English: Power-Lock Heated Hose Part Description 309572 Instructions - Parts Solvent Flush Kits Part Description 309963 Instructions - Parts Circulation Manifold Kit Part Description 309818 Instructions - Parts...

  • Page 4: Models

    Models Models Purge Rod Diameter Orifice Size Part in. (mm) in. (mm) Handle Type 257999 0.250 (6.35) 0.031 (0.79) Handheld 24C932 0.250 (6.35) 0.031 (0.79) Auto Orifice Flow Area Ratio Chart In general, flow area ratio should be equal to material ratio but will be influenced by material viscosity. The ideal flow area ratio is dependent on flow rates, material viscosity, and material ratio.

  • Page 5: Fixed Orifice Flowrate Data

    Models Fixed Orifice Flowrate Data EP Fixed Orifice Flow Data 5.00 4.75 0.086 in. Diameter Orifice 4.50 4.25 4.00 0.067 in. Diameter Orifice 3.75 3.50 3.25 0.060 in. Diameter Orifice 3.00 2.75 2.50 2.25 0.047 in. Diameter Orifice 2.00 1.75 1.50 1.25 0.031 in.

  • Page 6: Variable Orifice Flowrate Data

    Models Variable Orifice Flowrate Data VARIABLE ORIFICE FLOWRATE DATA (1000 PSI) 0.086 0.073 0.067 0.063 0.060 0.055 0.052 0.047 0.041 0.039 0.033 0.031 0.028 0.024 0.020 0.00 0.25 0.50 0.75 1.00 1.25 1.50 1.75 2.00 2.25 2.50 2.75 3.00 3.25 3.50 3.75 4.00...
  • Page 7 Models VARIABLE ORIFICE FLOWRATE DATA (1500 PSI) 0.086 0.073 0.067 0.063 0.060 0.055 0.052 0.047 0.041 0.039 0.033 0.031 0.028 0.024 0.020 0.00 0.25 0.50 0.75 1.00 1.25 1.50 1.75 2.00 2.25 2.50 2.75 3.00 3.25 3.50 3.75 4.00 4.25 4.50 4.75 FLOWRATE (gpm)
  • Page 8 Models VARIABLE ORIFICE FLOWRATE DATA (2000 PSI) 0.086 0.073 0.067 0.063 0.060 0.055 0.052 0.047 0.041 0.039 0.033 0.031 0.028 0.024 0.020 0.00 0.25 0.50 0.75 1.00 1.25 1.50 1.75 2.00 2.25 2.50 2.75 3.00 3.25 3.50 3.75 4.00 4.25 4.50 4.75 FLOWRATE (gpm)

  • Page 9: 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 10 Warnings WARNING FIRE AND EXPLOSION HAZARD Flammable fumes, such as solvent and paint fumes, in work area can ignite or explode. To help pre- vent fire and explosion: • Use equipment only in well ventilated area. • Eliminate all ignition sources; such as pilot lights, cigarettes, portable electric lamps, and plastic drop cloths (potential static arc).

  • Page 11: Important Two-Component Material Information

    Keep the ISO lube pump reservoir (if installed) filled impermeable gloves, boots, aprons, and goggles, is ™ ™ with Graco Throat Seal Liquid (TSL ), Part also required for everyone in the work area. 206995. The lubricant creates a barrier between the ISO and the atmosphere.

  • Page 12: Changing Materials

    Important Two-Component Material Information 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. •...

  • Page 13: Throat Seal Liquid

    Ground the pour gun through connection to a Engage trigger lock whenever you stop pouring to avoid Graco-approved grounded fluid supply hose. Always accidental triggering. Must be used with piston safety ground the gun when flushing.

  • Page 14: Loss Of Air Pressure

    Loss of Air Pressure Loss of Air Pressure Hook Support If necessary, use the hook support located on the top of the gun to support the weight of the gun. Connect a strong rope or chain able to support the weight of the gun to the hook, then connect the other end to a sup- Purge rod actuation is controlled by air pressure.
  • Page 15 Hook Support 313872N...

  • Page 16: Component Identification

    Component Identification Component Identification See Parts on page 40 for part numbers and further component identification. ti19550a Key: Hook Support Dual Pistons Fluid Housing Bulkhead Orifice Piston Safety Lock Fluid Manifold Cartridge Air Cylinder, Gun Body Airline Fitting Mounting Plate Solenoid Valve Gasket Electric Trigger Handle (optional) Solenoid Valve Mounting Plate...

  • Page 17: Cutaway View

    Component Identification Cutaway View ti19551a 313872N...

  • Page 18: Theory Of Operation

    Theory of Operation Theory of Operation Gun Triggered (Fluid Pouring) Gun Detriggered Purge rod retracts, opening the impingement ports and Purge rod extends, closing the impingement ports and allowing fluid to mix and flow through the nozzle. stopping fluid flow. Purge Rod Grease Purge Rod...

  • Page 19: Setup

    Setup Setup Perform this setup procedure to get the pour gun ready 6. Connect gun air whip hose (AA) to air quick for operation. coupler (AC). Turn on air. Open air valve (AB). See F . 6. 1. Close fluid valves A and B. ti19556a TI2411a 7.

  • Page 20: Adjust Orifices

    Setup 11. Engage piston safety lock. See page 13. Adjust Orifices 12. Turn on proportioner. See proportioner manual. In order to balance pressures between the A component and B component the needle in each orifice may need to 13. Open fluid valves A and B. be adjusted.

  • Page 21: Optional Hose Position

    Setup Optional Hose Position 5. Apply thread sealant to plugs (AH), elbows (AJ), and male threads of swivels (AE). Install elbows (AJ) in optional inlets, facing down. See F 11. Install swivels in elbows. Be sure to install the A swivel in the A side.

  • Page 22: Pressure Relief Procedure

    Pressure Relief Procedure Pressure Relief Procedure 7. Relieve system pressure. See Pressure Relief Pro- cedure in proportioner manual. 8. Ensure fluid valves are closed then remove fluid manifold. 1. Engage piston safety lock. See page 13. 9. Place the fluid manifold over waste containers, fac- NOTE: Air supply is required for purge rod actuation.

  • Page 23: Shutdown

    Shutdown Shutdown Short Term Shutdown Long Term Shutdown Perform Short Term Shutdown procedure if gun will not Perform Long Term Shutdown procedure if gun will not be used for more than one hour. be used for more than 48 hours. 1.

  • Page 24: Maintenance

    Maintenance Maintenance Lubrication Procedure Schedule Grease the Gun, page 24 Daily See Accessories on page 53 to order lubricant. Liber- Replace Mix Chamber and Front Every 2-4 ally lubricate all o-rings, seals, and threads. Seal, see page 29 Weeks Clean Check Valves, page 27 Monthly NOTICE Clean Outside of Gun, page 26...

  • Page 25: Flush Gun

    Maintenance 4. Use a grease gun with the required synthetic 4. Install flush hoses to flush manifold 15B817. See grease, part 117773, to purge the gun body until . 16. Install flush manifold onto gun. Torque flush grease exits the weep hole without evidence of for- manifold bolt to 20-30 in-lb (2.26-3.39 N•m).

  • Page 26: Clean Outside Of Gun

    Maintenance Clean Outside of Gun Clean Fluid Manifold The solvents listed in this section may ignite if used in flushing. Use them only for external cleaning. Fluid Manifold Fluid Ports Wipe the outside of the gun with a compatible solvent. See materials of construction info in Technical Data, page 55.

  • Page 27: Clean Check Valves

    Maintenance Clean Check Valves 6. Use flat tip screwdriver to pry out check valves at notch. 1. Follow Pressure Relief Procedure, page 22. 2. Flush Gun, page 25. 3. Disconnect air quick coupler (AC). Use hex nut driver to remove fluid manifold (AD). ti19569a Damaged check valve o-rings may result in external leakage.

  • Page 28: Clean Fluid Housing Passages

    Maintenance 11. Use hex nut driver to install fluid manifold (AD). 2. Use 5/16 in. nut driver (supplied) to remove Torque fluid manifold bolt to 20-30 in-lb orifices (C). See F . 4 on page 16. (2.26-3.39 N•m). Connect air quick coupler (AC). NOTICE To prevent cross-contamination of the orifices do not interchange A component and B component...

  • Page 29: Clean Orifice

    Maintenance Clean Orifice Replace Mix Chamber and Front Seal 1. Follow Pressure Relief Procedure on page 22. 2. Use 5/16 in. nut driver (supplied) to remove orifices (C). See F . 4 on page 16. NOTICE To prevent cross-contamination of the orifices do not interchange A component and B component parts.

  • Page 30: Repair

    Repair Repair Tools Required Replace Cartridge Tools required to complete some gun repair procedures: • 15/16 in. wrench • flat head screwdriver (supplied) • 5/16 hex nut driver (supplied) The cartridge is necessary for proper operation of the • 1/2 in. deep well socket gun.

  • Page 31: Remove Front End

    Repair Remove Front End 6. Pull fluid housing away from gun body to remove. If fluid housing cannot be removed perform the follow- ing steps. a. Attach air quick coupler. b. Pull and release the trigger or press and release the red button on the solenoid valve.

  • Page 32: Disassemble Front End

    Repair Disassemble Front End Assemble Front End NOTICE NOTICE To prevent cross-contamination of the equipment’s wet- To prevent cross-contamination of the equipment’s wet- ted parts, never interchange component A (isocyanate) ted parts, never interchange component A (isocyanate) and component B (resin) parts. The gun is shipped with and component B (resin) parts.

  • Page 33: Attach Front End

    Repair 5. Install check valve assembly. See Clean Check 6. Push fluid housing flush to the gun body. Rotate Valves on page 27 for detailed assembly instruc- fluid housing 45 degrees clockwise to engage fluid tions. housing slots. 6. Install orifice components (25). Install orifice cap (25a) and torque to 20-30 in-lb (2.26-3.39 N•m).

  • Page 34: Pistons And Bulkhead

    Repair Pistons and Bulkhead 6. Unscrew piston safety lock assembly and remove. Inspect o-ring and replace if necessary. User should have piston seals kit 24D312 available before performing this procedure. 1. Follow Pressure Relief Procedure, page 22. 2. Use hex nut driver to remove fluid manifold (AD). TI14465a 7.

  • Page 35: Purge Rod

    Repair 14. Install bulkhead onto piston shaft. Torque to Purge Rod 100-110 in-lb (11.3-12.4 N•m). See Component Identification on page 16. 15. Apply medium strength threadlocker to threads then install rear piston onto piston shaft. Torque to 100-110 in-lb (11.3-12.4 N•m). See Component 1.

  • Page 36: Solenoid Valve

    Repair Solenoid Valve 1. Follow Pressure Relief Procedure on page 22. 2. Disconnect air quick coupler (AC). Use hex nut driver to remove fluid manifold (AD). ti19568a 3. Disconnect electronic cables from solenoid valve and handle (if installed). 4. Use 5/32 in. allen wrench to remove handle mount- ing plate screws.

  • Page 37: Troubleshooting

    Troubleshooting Troubleshooting Follow Pressure Relief Procedure, page 22, before checking or repairing gun. NOTICE To prevent cross-contamination of the equipment’s wet- ted parts, never interchange component A (isocyanate) and component B (resin) parts. The gun is shipped with the A side on the left. The fluid manifold, fluid housing, side seal assembly, check valve cartridge, and mix chamber are marked on the A side.
  • Page 38 Troubleshooting Problem Cause Solution Burst of air from muffler when gun is Normal No action required triggered Steady air leakage from muffler Damaged air valve Replace Damaged air gasket Replace Damaged piston o-rings Replace Leak between air cylinder and fluid Damaged o-ring Replace housing...

  • Page 39: Electrical Diagram

    Troubleshooting Electrical Diagram MALE FEMALE BLACK #2 BLACK #1 BROWN SWITCH SIGNAL BLUE 24VDC COMMON SOLENOID ACTIVATION MALE FEMALE MALE 313872N...

  • Page 40: Parts

    Torque to 20-30 in-lb (2.26-3.39 N•m) Torque to 100-110 in-lb (11.3-12.4 N•m) Torque to 10-12 in-lb (1.13-1.36 N•m) Torque to 60-70 in-lb (6.78-7.91 N•m) Apply medium thread locker to threads Model 257999 Shown ti19585a 4-Hose Fluid Manifold 249523 ti14472a ti7134a...
  • Page 41 Parts Quantity 257999, EP Gun, 250, 24C932, 0.031 in. EP Gun, 250, orifice, 0.031 in. Part Description Handheld orifice, Auto 24D682 CYLINDER, machined 24F033 HOOK, vertical mount assembly 113003 SCREW, socket head cap 24E864 SHAFT, piston, dual ◆ PACKING, o-ring...
  • Page 42 Parts Quantity 257999, EP Gun, 250, 24C932, 0.031 in. EP Gun, 250, orifice, 0.031 in. Part Description Handheld orifice, Auto 24D073 HANDLE, 2k dispense C19980 SCREW, cap, socket hd 172479 ▲ TAG, warning 112307 ELBOW, street 117510 COUPLER, line, air, 1/4 npt...

  • Page 43: Kits

    Kits Kits See Maintenance on page 24 and Repair on page 30 for appropriate kit installation procedures. See Complete O-ring Placement Guide on page 52 for o-ring identification help. Series A and B Kits The following kits are for series A and B guns only. Series A and B guns utilize the TSL cartridge for lubrica- tion of the purge rod and the front head assembly does not contain a scraper.
  • Page 44 Kits Parts included in Kit Description Description Kit Number Illustration 375 Orifice 24C761 - Orifice Housing 24C766, O-Ring 24C794 - O-Ring 24C804; see Orifice O-Ring Kits on Needle page 50 Backup Ring O-Ring Orifice Cap Orifice Spacer Cleanout Drill Fluid Hous- 24D313 Housing Outer ing Seals...

  • Page 45: All Series Kits

    Kits All Series Kits The following kits are for all series EP guns. Parts included in Kit Description Description Kit Number Illustration 250 Iso Ori- 24D223 - Orifice Housing fice 24D238; O-Ring see Orifice O-Ring Kits on page 50 O-Ring Needle Backup Ring O-Ring...
  • Page 46 Kits Parts included in Kit Description Description Kit Number Illustration Orifice 248128 O-Ring O-Ring Kit Iso Check 246731 Check Valve Hous- Valve Spring Retaining Screw Carbide Ball Filter Check Valve Spring O-Ring O-Ring Check Valve 246352 Check Valve Hous- Spring Retaining Screw Carbide Ball Filter...
  • Page 47 Kits Parts included in Kit Description Description Kit Number Illustration Check Valve 248129 O-Ring O-Ring Kit Check Valve 248133 O-Ring Face O-Ring Inner Fluid 256773 O-Ring Housing O-Ring Kit 250 Lip Seal 24E252 250 Lip Seal O-Ring Piston Seals 24D312 Rod O-Ring Front Piston O-Ring Bulkhead O-Ring...
  • Page 48 Kits Parts included in Kit Description Description Kit Number Illustration Piston Safety 24D295 Back Cap Stop O-Ring Piston Stop Safety Stop Shaft O-Ring Spring Stop Shaft 257425 O-Ring O-Ring Kit Located inside back cap Handle 24D073 2K Electric Handle Handle Mounting Screw Trigger 24D049...

  • Page 49: Series C Kits

    Kits Series C Kits The following kits are for series C guns only. Series C guns do not utilize the TSL cartridge for lubrication of the purge rod and the front head assembly does contain a scraper. Parts included in Kit Description Description Kit Number...

  • Page 50: Orifice Kits

    Kits Orifice Kits In the following table, shaded rows indicate “Super Stan- dard” items that are typically stocked and provide the best delivery dates. Impingement Kit Type and Kit Number Port Size 250 Model Polyol 250 Model Iso Orifice Kit Orifice Kit 0.016 0.41...

  • Page 51: Drill Bit Kits

    Kits Drill Bit Kits For cleaning fluid housing passages and orifices. Drill bit illustrations are actual size for comparison. See Clean Fluid Housing Passages on page 28. Not all sizes are used with every gun model. Orifice Size Drill Bit Qty in Number Size...

  • Page 52: Complete O-Ring Placement Guide

    Kits Complete O-ring Placement Guide The following illustration shows all gun o-rings at actual size. See Kits on page 43 for o-ring kit details including quantities of each o-ring in each kit. See Parts on page 40 for part references and locations. 313872N...

  • Page 53: Accessories

    248279, 4 oz (113 gram) [10] High adhesion, water resistant, lithium-based lubricant. MSDS sheet available at www.graco.com. Fluid Inlet Cover 15C850 Recirculation Block T3877a ®...

  • Page 54: Solvent Flush Canister Kit

    Accessories Solvent Flush Canister Kit Grease Cartridge for Gun 248139, 1 qt (0.95 liter) Solvent Cup Shutdown Includes flushing manifold to flush gun with solvent. Por- 248280 Cartridge, 3 oz [10] table for remote flushing. See manual 309963. Specially formulated low viscosity grease flows easily through gun passages, to prevent two-component cur- ing and keep fluid passages clean.

  • Page 55: Technical Data

    Technical Data Technical Data Maximum Fluid Working Pressure ....3000 psi (20.7 MPa, 207 bar) Minimum Air Inlet Pressure..... . 80 psi (0.55 MPa, 5.5 bar) Maximum Air Inlet Pressure .

  • Page 56: Dimensions

    Technical Data Dimensions Side View Bottom View ti19587a Ref Dimension, in. (mm) 10.8 (274) 11.7 (297) 6.1 (155) 3.1 (79) 0.73 (19) 1.06 (27); Mounting: 4x 10-24 313872N...
  • Page 57 Technical Data 313872N...

  • Page 58: Graco 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:

24c932

Table of Contents