Graco 332095A User's Manual
Contents
1. LIMITED TO WARRANTY OF MERCHANTABILITY OR WARRANTY OF FITNESS FOR A PARTICULAR PURPOSE Graco s sole obligation and buyer s sole remedy for any breach of warranty shall be as set forth above The buyer agrees that no other remedy including but not limited to incidental or consequential damages for lost profits lost sales injury to person or property or any other incidental or consequential loss shall be available Any action for breach of warranty must be brought within two 2 years of the date of sale GRACO MAKES NO WARRANTY AND DISCLAIMS ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE IN CONNECTION WITH ACCESSORIES EQUIPMENT MATERIALS OR COMPONENTS SOLD BUT NOT MANUFACTURED BY GRACO These items sold but not manufactured by Graco such as electric motors switches hose etc are subject to the warranty if any of their manufacturer Graco will provide purchaser with reasonable assistance in making any claim for breach of these warranties In no event will Graco be liable for indirect incidental special or consequential damages resulting from Graco supplying equipment hereunder or the furnishing performance or use of any products or other goods sold hereto whether due to a breach of contract breach of warranty the negligence of Graco or otherwise FOR GRACO CANADA CUSTOMERS The Parties acknowledge that they have required that the present document as well as all documents notices and legal2. Re use of U cup seals is not recommended Only re use U cups as a last resort If you must re use them be sure that they are clean have no cuts or flat spots and contain NO foreign material Also be sure not to soak them in solvent for extended periods as this can cause deterioration of the seal Always replace U cups that are cut have flat spots are distorted in shape or are damaged in any manner Always be alert to the proper orientation of the sealing lips and re install them in the same direction as shown on the specific equipment assembly drawing The U cup seals are intended to seal in only one direction and if installed incorrectly chemical leakage through the U cup can occur Whenever possible push the back side of the seal over the shaft to protect the inner and outer lips If this is not possible carefully tuck the lip in to avoid rolling it back or cutting it If installing over sharp edges slide the seal carefully into place to avoid cutting it Do not use any sharp tools or objects to install U cups 13 Graco Standard Warranty Graco warrants all equipment referenced in this document which is manufactured by Graco and bearing its name to be free from defects in material and workmanship on the date of sale to the original purchaser for use 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 equ
3. must re use them be sure that they are clean have no cuts or flat spots and contain NO foreign material Also be sure not to soak them in solvent for extended periods as this can cause deterioration of the O ring Always replace O rings that are cut nicked or distorted in shape or cross section Always apply a very thin film of Krytox 203GPL lubricant item 84 0200 K3 11 to the entire surface of the o ring before installation Avoid excessive lubrication If installing O rings over threads on a shaft or across sharp edges roll or push the O ring carefully into place being careful to avoid cutting or nicking it Avoid stretching the O ring too much as it may not return to the proper size Do not use any sharp tools or objects to install O rings U cup Seal Guidelines Always replace a U cup seal with the identical one in size durometer hardness type and material of construction Always be alert to the location and size of each U cup seal as many look alike and be careful not to mix them Often similar sizes may be used in various locations on the equipment and if replaced incorrectly the equipment may not function properly Refer to the Machine Operation and Service Manual for the correct part number of all U cups used throughout the equipment and replace them with factory approved parts only Always apply a very thin film of Krytox 203GPL lubricant item 84 0200 K3 11 to the inner and outer lips of the seal before installation e
4. proceedings entered into given or instituted pursuant hereto or relating directly or indirectly hereto be drawn up in English Les parties reconnaissent avoir convenu que la r daction du pr sente document sera en Anglais ainsi que tous documents avis et procedures judiciaires ex cut s donn s ou intentes a la suite de ou en rapport directement ou indirectement avec les procedures concern es Graco Information For the latest information about Graco products visit www graco com TO PLACE AN ORDER contact your Graco distributor or call to identify the nearest distributor Phone 612 623 6921 or Toll Free 1 800 746 1334 Fax 330 966 3006 All written and visual data contained in this document reflects the latest product information available at the time of publication Graco reserves the right to make changes at any time without notice For patent information see www graco com patents Original Instructions This manual contains English MM 332095 Graco Headquarters Minneapolis International Offices Belgium China Japan Korea GRACO INC AND SUBSIDIARIES P O BOX 1441 MINNEAPOLIS MN 55440 1441 USA Copyright 2010 Graco Inc All Graco manufacturing locations are registered to ISO 9001 www graco com
5. 5 AIR CYLINDER ASSEMBLY ILLUSTRATION AAA V EE eg E O J AIR CYLINDER BODY 2 NENDCARV S A BBNUFF BACK ADJUSTMENT KNOB i 4 PISTON ooo o 5 PISTONROD o O o 6 ELBOW S 8 SCREW 6 32x5 16 gt 8 SCREW H6 32x S 11 CREW 10 24x1 2 S 12 RING o 13 RING S 14 RING 15 LOCKWASHER o gt oo 10 TROUBLESHOOTING If operating difficulties are encountered review the symptoms below With each problem there are one or more possible causes that should be investigated to resolve the situation NOTHING HAPPENS If absolutely nothing happens when trying to cycle the Dispense Head check the electric pneumatic power Check the footswitch or cycle start switch to be sure it is plugged in VALVE CYCLES NOTHING DISPENSED First try to purge the unit this should fix most situations If it doesn t check to see that there is enough pressure to the reservoir or transfer pump Perhaps the Reservoir Nozzle Needle path is clogged examine and clear or replace as necessary Consider whether the material could have set up in the system See the Wet System Checkout and Operation Adjustments sections IRREGULAR VOLUME DISPENSED Frequently this is caused by faulty material The material must be a smooth homogeneous mixture without any air entrapped in it A second cause could possibly be that the material is not being supplied Check the reservoir pressure as it may be too
6. GRACO Instructions 339095A Dispensit 715 ei Usage Statement Depending on valve configuration this valve can be used to dispense the following Acrylics Urethanes Lubricants e UV Curables e Silicone Oil RTV Silicone e Sealants e Epoxies Greases Filled Materials Heat Sink Compounds Dispense Valve 100psi 0 69 MPa 6 9 bar Maximum Working Pressure Pa Important Safety Instructions Read all warnings and instructions in this manual Save these instructions see Page 3 for model information including maximum working pressure and approvals PROVEN QUALITY LEADING TECHNOLOGY DISPENSIT MODEL 715 DISPENSE VALVE OPERATING amp MAINTENANCE MANUAL General Aperture 3 Safety INTOFMAUON Ee 3 Illustration ENT 3 ebe 3 Description Of Operation nana 4 setup ProcedUle E 5 Mounting Dispense Valve nannnnannannnnannnnanonnnnrnnnnrnrnnrnrnnrnrrnrnrrnrnrrnenerne gt 9 PA SOMO ER O JE EM 5 Upetating Ftoregl tee 5 Diy System e TEE 5 Maternal a elle Le ivo eine a E ea a 9 Wer e Ee Ce in Le EE 6 WetSYyStem e ue te EE 6 Operation Adjustments E 6 Air Supply Adj ustMe EE 6 Material Output and Snuff Back Adjustment 6 Dispense Needle Height Adjustment 6 Periodic NIAINTEN ANCE weisescesiiivecscasivedainstvadaswetvedsbnetiadabwwtvadabwabvesbintiadebietndtt 7 Dispense Nozzle Needle Replacement onnannnnennnnen
7. JIJJ JJJJIJ Needle 1 4 NPTM 16 ga x 2 1 94 0624 98 Needle 1 4 NPTM 15 ga x 2 4 94 0624 H 98 Needle 1 4 NPTM 14 ga x 2 94 0624 A 98 Needle 1 4 NPTM 13 ga x 2 94 0624 B 98 Needle 1 4 NPTM 12 ga x 2 94 0624 C98 Needle 1 4 NPTM 11 ga x 2 94 0624 D 98 Needle 1 4 NPTM 10 ga x 2 94 0624 E 98 Needle 1 4 NPTM 8 ga x 2 I 94 0624 F 98 Needle 1 4 NPTM 7 ga x 2 94 0624 G 98 The quantity or needle size may vary for your application 12 GENERAL GUIDELINES FOR O RINGS AND U CUP SEALS Sizes and materials of construction for O rings and U cup seals are selected by Graco based on compatibility with the chemicals to which they will be exposed Solvents that may remove residual chemicals often have negative effects on the mechanical properties of O rings and seals O Ring Guidelines Always replace an O ring with the identical one in size durometer hardness type and material of construction Always be alert to the location and size of each O ring as many look alike and be careful not to mix them Often similar sizes may be used in various locations on the equipment and if replaced incorrectly the equipment may not function properly Refer to the Machine Operation and Service Manual for the correct part number of all O rings used throughout the equipment and replace them with factory approved parts only e Re use of O rings is not recommended Only re use O rings as a last resort If you
8. NUFF BACK ADJUSTMENT The material output depends on the material pressure size of nozzle or needle the dispense time and the rate at which the dispense valve is moved by the system to which it is attached The Model 715 Snuffer allows material to be drawn back into the dispense nozzle needle when the Spool 2 retracts to minimize post dispense dripping or drooling This is the snuff back feature Snuff back can be adjusted only while dispensing The snuff back adjustment knob on the top of the valve controls this Turn the knob in or clockwise to decrease snuff back or turn the knob out or counterclockwise to increase snuff back If desired results are not achieved try adjusting through the full range of travel DISPENSE NOZZLE NEEDLE HEIGHT ADJUSTMENT Ideally the material should just contact the work piece enough to create an adhesive bond and cause a clean separation of the material from the outlet tip upon completion of the dispense cycle PERIODIC MAINTENANCE DISPENSE NOZZLE NEEDLE REPLACEMENT If no material or reduced volumes of material come out of the dispense nozzle needle it may be partially or completely clogged Clean with water or solvent depending on the material dispensed A fine wire used cautiously will help open clogged needles Replace the nozzle or needle if damaged or severely clogged Replacement nozzles and needles can be ordered by specifying the proper part number See the Recommended Spare Parts sec
9. e delivery tubing and fittings must be compatible with the material being dispensed and capable of withstanding the dispensing pressure gt G OPERATING PROCEDURES WET CUP LOADING Some models are eguipped with a wet cup around the Spool 2 to keep it wetted This helps prevent curing or crystallization of material on the spool and conseguent premature seal failure Fill the wet cup with a compatible self leveling material prior to operation if your valve is so eguipped WET SYSTEM CHECKOUT Using the purge cycle on the air supply controller run the material through the material supply line and valve until a smooth material flow is observed through the dispense nozzle After the purge cycle has been completed set the air supply controller to the manual cycle mode and cycle the dispense valve several times OPERATION ADJUSTMENTS AIR SUPPLY ADJUSTMENT The air pressure to the controller and material supply regulator is typically 70 psi 4 8 bar Do not exceed 100 psi 6 9 bar pressure to the dispense valve However the material supply pressure must be adjusted according to the type of material being dispensed Too low a pressure will give you an inconsistent dispensed volume because the material does not have sufficient pressure to flow smoothly through the nozzle Too high a pressure may cause material separation or packing Use the minimum pressure needed to obtain smooth material flow during the purge cycle MATERIAL OUTPUT AND S
10. e other Posipak Seal 6 into the Adapter 4 8 Screw the Adapter 4 into the Material Inlet 3 taking care that the Posipak Seal 6 slides over the extended Spool 2 without rolling the lip 9 Install the Nozzle 5 or Needle 12 into the Adapter 4 Perform the Dry System Checkout Material Loading and Wet System Checkout procedures The 715 Dispense Valve is now ready to be placed back in service mev AAAA KRA te ate MODEL 715 GENERAL ILLUSTRATION OPEN SNUFFER VALVE CLOSE SNUFFER VALVE 9 1 M IR CYLINDER ASSEMBLY SPOOL 3 MATERIAL INLET 4 ADAPTER 5 NOZZLE some models POSIPAK SEAL 2 pieces most models 4 pieces some models 8 SCREW 9 SEALRETAINER 10 ELBOW 11 ELBOW 12 NEEDLE some models PERIODIC MAINTENANCE DISASSEMBLY AIR CYLINDER ASSEMBLY Refer to the illustration on the next page and the drawings in the back of this manual for your exact model Turn off the air supply and disconnect the air lines Turn off the material supply and remove the material line from the Material Inlet 3 Remove the valve from its mounting Remove the Screws 8 and pull the Wet Section away from the Air Cylinder Assembly Unscrew the Spool 2 on the prior illustration from the Piston Rod 5 5 Unscrew the End Cap 2 from the Air Cylinder Body 1 6 Remove and discard the O ring 12 7 Remove the Screw 11 and Lock Washer 15 from the Snuff Back Adjustm
11. ent Knob 3 8 9 1 ee Remove the Piston 4 from the Air Cylinder Body 1 Remove and discard the O ring 13 O Remove and discard the O rings 14 The 715 Dispense Valve Air Cylinder Assembly is now ready for cleaning and assembly ASSEMBLY AIR CYLINDER ASSEMBLY 1 Install the lower O ring 14 into the groove in the Air Cylinder Body 1 This is easiest if performed from the top Squeeze the O ring to an oblong shape to get it started in the groove then push it gradually into place with a small blunt tool 2 Install the O ring 13 around the Piston 4 3 Insert the Piston 4 assembly carefully into the Air Cylinder Body 1 until the Piston Rod 5 passes through the lower O ring 14 Install the upper O ring 14 into the groove in the End Cap 2 Install the Screw 11 through the Lock Washer 15 and upper O ring 14 and into the Snuff Back Adjustment Knob 3 Make sure the Lock Washer 15 is fully compressed Install the O ring 12 into the Air Cylinder Body 1 Screw the End Cap 2 into the Air Cylinder Body 1 Screw the Spool 2 on prior illustration into the Piston Rod 5 Slide the Wet Section over the Spool 2 on prior illustration until it seats in the Air Cylinder Body 1 and secure it with the Screws 8 Ke o pN Perform the Dry System Checkout Material Loading and Wet System Checkout procedures The 715 Dispense Valve is now ready to be placed back in service MODEL 71
12. ied by changing the material pressure nozzle size dispense speed and dispense time RNI k as Iwas e HAD AA 4 When the correct amount of material has been dispensed the controller relieves air from the Open port and applies air to the Close port The Spool 2 retracts into the lower Posipak Seal 6 snuffing the material back into the Nozzle 5 sealing the valve and ending the dispensing process The system is again in the normal ready state SETUP PROCEDURE MOUNTING DISPENSE VALVE Mounting holes are drilled through the valve body The valve may be tilted to a maximum of 60 degrees from the vertical depending on the application AIR CONTROLLER Operation of the Model 715 Dispense Valve requires a controller that can provide the following e Aminimum of 0 5 SCFM 2 3 cm of dry unlubricated air at a minimum pressure of 70 psi 4 8 bar anda maximum of 100 psi 6 9 bar Time delay capability to allow the valve to cycle Independent air pressure regulators for material supply and valve operation Purge capability which is the ability for the operator to pass or not pass air to the valve s Open port For semiautomatic or automatic applications a foot switch or other control to cycle the valve Connection for 16 ID x 25 OD 6 35mm pressure tubing for use between the dispense valve and controller Connection for 16 ID x 25 OD 6 35mm pressure tubing for use between the control
13. ipment determined by Graco to be defective This warranty applies only when the equipment is installed operated and maintained in accordance with Graco s written recommendations This warranty does not cover and Graco shall not be liable for general wear and tear or any malfunction damage or wear caused by faulty installation misapplication abrasion corrosion inadequate or improper maintenance negligence accident tampering or substitution of non Graco component parts Nor shall Graco be liable for malfunction damage or wear caused by the incompatibility of Graco equipment with structures accessories equipment or materials not supplied by Graco or the improper design manufacture installation operation or maintenance of structures accessories equipment or materials not supplied by Graco This warranty is conditioned upon the prepaid return of the equipment claimed to be defective to an authorized Graco distributor for verification of the claimed defect If the claimed defect is verified Graco will repair or replace free of charge any defective parts The equipment will be returned to the original purchaser transportation prepaid If inspection of the equipment does not disclose any defect in material or workmanship repairs will be made at a reasonable charge which charges may include the costs of parts labor and transportation THIS WARRANTY IS EXCLUSIVE AND IS IN LIEU OF ANY OTHER WARRANTIES EXPRESS OR IMPLIED INCLUDING BUT NOT
14. ler and material supply air inlet OPERATING PROCEDURES If there are any problems in getting started refer to the Troubleshooting section or call Technical Service at 330 494 1313 DRY SYSTEM CHECKOUT This is an initial checkout to determine if the setup has been properly completed The dry checkout is conducted without any material in the system Refer to the illustrations above or below 1 Turn on the controller and the air supply 2 Set the air pressure to 70 psi 4 8 bar on the system pressure gauge 3 Inthe normal ready state the Spool 2 is seated in the Posipak Seal 6 sealing the dispense valve For this test remove the Nozzle 5 so that you can visually verify that the Spool 2 extends upon actuation 4 Momentarily press the dispense valve cycling control switch 5 The controller applies air to the Open port of the dispense valve the Spool 2 extends After the time delay the controller applies air to the Close port causing the Spool 2 to retract Visually verify the spool movement When this happens the system is correctly installed MATERIAL LOADING Material is supplied from a pressure vessel or pump with enough pressure to cause a proper rate of flow from the dispense nozzle Note The material pressure will vary depending on the application Attach the air line to the regulator and set the air pressure control to the setting required for the application Note When using a remote reservoir th
15. low for the type of material being dispensed and or the rate at which the system moves the dispense valve may be too fast To adjust follow the directions found in the Operation Adjustments section of this manual REDUCED VOLUMES DISPENSED Check to see if Nozzle Needle is partially clogged refer to Periodic Maintenance section NO MATERIAL DISPENSED This is due to a clogged Nozzle Needle refer to Periodic Maintenance section MATERIAL CONTINUES TO FLOW AFTER SHUT OFF This can be typical for the material and can often be compensated for by adjusting the amount of Snuff Back See the Material Output and Snuff Back Adjustments section under Operation Adjustments More extreme situations can be due to material preventing the Spool from seating properly into the Posipak Seal seat or to a worn Spool and or seat Refer to Periodic Maintenance for the Wet Section clear the blockage or replace the worn components 1 MODEL 715 RECOMMENDED SPARE PARTS Note These parts are routine supply items or wear parts not covered by warranty for normal wear SEAL KIT 715 see assembly drawing for part number SPOOL see assembly drawing for part number PISTON ROD see assembly drawing for part number KRYTOX 203GPL ASSEMBLY LUBRICANT 84 0200 K3 11 Pa MAM LJ NOZZLE 1 4 NPTM x2 1 6 Orifice NOZZLE 1 4 NPTM x 4 1 32 Orifice NOZZLE 1 4 NPTM x4 3182 Orifice NOZZLE 1 4 NPTM x 4 1 8 Orifice POD OODIJJJJ IJJJIJJJJ
16. nnnsnnnnsrnnnsrrerrrrerrn T Disassembly Wet Gechon ea T Assembly Wet Gechon T Model 715 General INUSTATION aaa vana viva vivo A oi ovi vine 8 Disassembly Air Cylinder Assembly nannannannannannnnnnnnnnennnrnnnnnnnnnnnnnn 9 Assembly Air Cylinder Assembhy 9 Model 715 Air Cylinder Assembly lllustration 10 PEOUDIC SOO CAG EE 11 Model 715 Recommended Spare Patts ccccseceeeeeecseeceeceeseneceeseneees 12 General Guidelines for O rings and U cup Seals 13 EI d ue 14 2 GRACO GENERAL INFORMATION The Model 715 Dispense Valve is an On Off valve designed for a continuous flow of viscous material through a dispense needle in automatic semi automatic or manual applications It is shipped complete with the following Model 715 Dispense Valve Two 3 foot 9 m sections of pneumatic air line Seal Kit Operating and Maintenance Manual SAFETY INFORMATION This product should be used only by employees who have been given appropriate training and safety warnings as set forth in this manual Read completely before operating Toxicity and flammability hazards depend upon the product being dispensed by this unit and the user should take appropriate safety precautions as indicated on the MSDS of the product Always wear safety glasses ILLUSTRATION REFERENCES Throughout this manual you will find references by illustration item n
17. tion of this manual or consult the drawings for your exact model DISASSEMBLY WET SECTION Refer to the illustration on the next page and the drawings in the back of this manual for your exact model Turn off the air supply and disconnect the air lines Turn off the material supply and remove the material line from the Material Inlet 3 Remove the valve from its mounting Remove the Screws 8 Pull the Material Inlet 3 away from the Air Cylinder Assembly 1 Grasp the end of the Spool 2 and pull it down to the fully extended position Wipe off the Spool 2 and inspect it for wear Remove the Spool 2 if worn Remove the Nozzle 5 or Needle 12 from the Adapter 4 Remove the Adapter 4 from the Material Inlet 3 10 Remove and discard the O ring 7 11 Remove the Seal Retainer 9 and Posipak Seals 6 oe toa ef The 715 Dispense Valve Wet Section is now ready for cleaning and assembly ASSEMBLY WET SECTION 1 Install the Spool 2 if you removed it 2 Install the O ring 7 in the bottom end of the Material Inlet 3 3 Install the Posipak Seal 6 in the top end of the Material Inlet 3 Some models have a single seal in this location and some have 3 seals in this location Check the drawings for your exact model 4 Install the Seal Retainer 9 5 Slide the Material Inlet 3 carefully over the Spool 2 until it seats in the Air Cylinder Assembly 1 6 Install the Screws 8 7 Install th
18. umber to the illustrations in the manual The references are indicated by parentheses around a number such as 7 Illustrations represent typical valve configurations The drawings for your exact model are inserted at the back of the manual and include the part numbers for ordering replacement parts GENERAL ACCESSORIES GracoOhio offers a full line of standard and custom accessories for your dispensing needs including Valve Controllers Syringe Feed Systems Cartridge Retainers and Pressure Reservoirs Titan 200 High Pressure Cartridge Feed Systems Transfer Pump Feed Systems for 1 5 and 55 gallon containers Mounting Bases and Brackets Custom Needles and Needle Blocks Consult your Dispensit dealer or the factory for details DESCRIPTION OF OPERATION POLANA OPEN SNUFFER VALVE 1 The normal ready state of the system is as follows e The material supply line is filled with dispensable material e The system has been purged filling the valve with material up to the Spool 2 e The Spool 2 is seated in the lower Posipak Seal 6 CLOSE SNUFFER VALVE RU 2 N The dispense cycle begins when the controller is activated Air at 70 psi 4 8 bar enters the Open port and extends the Spool 2 through the lower Posipak Seal 6 3 Material flows through the Material Inlet 3 around the narrow section of the Spool 2 and out through the Nozzle 5 or Needle 12 Volume can be var
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