Graco 332093A User's Manual
Contents
1. clear or replace as necessary Consider whether the material could have set up in the system IRREGULAR VOLUME DISPENSED Irregular dispensing can usually be attributed to faulty material The material must be a smooth homogeneous mixture without any air trapped in it A second cause could possibly be that the material is not filling the dispense tube fully and in time Check the reservoir pressure it may be too low for the type of material being dispensed and or the cycle time may be set too fast Cycle time is a function of the air supply controller To adjust follow the directions found in the controller operating manual REDUCED VOLUMES DISPENSED Check to see if dispense tube requires replacement or whether needle is partially clogged TUBING LIFE VERY SHORT Incorrect dispense tube tube wall thickness too large VALVE DRIPS Dispense tube needs replacing wrong dispense tube used wall thickness too small SLOW OR SLUGGISH CYCLE TIME This may be due to inadequate lubrication of the piston walls Remove the pinch off piston Apply a very thin film of Krytox lubricant part number 84 0200 K3 11 to the outside diameter surfaces of the pistons and the U cup seal and reassemble This will restore smooth and consistent operation 11 Note These parts are routine supply items or wear parts not covered by warranty for normal wear SEAL KIT 702 20 see assembly drawing for part number KRYTOX 203GPL ASSEMBLY LUBRICAN2. on the MSDS of the product Always wear safety glasses ILLUSTRATION REFERENCES Throughout this manual you will find references by illustration item number 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 Graco Inc offers a full line of standard and custom accessories for your dispensing needs including Valve Controllers Syringe Feed Systems Cartridge Retainers and Pressure Reservoirs Transfer Pump Feed Systems for 1 5 and 55 gallon containers Mounting Bases and Brackets Consult your Dispensit dealer or the factory for details DESCRIPTION OF OPERATION The normal ready state of the system is as follows e The syringe or remote reservoir contains the dispensable material e The system has been purged filling the dispense tube and needle with material e The Pinch off Piston 18 is not pressurized but is held back by the Spring 7 closing the Dispense Tube 21 and holding back the dispensable material The dispense cycle begins when the controller is activated The Pinch off Piston 18 moves forward to release the dispense tube allowing material to flow To complete the dispense cycle the Pinch off Piston 18 is pushed back by the Spring 7 sealing
3. used cautiously will help open clogged needles Replace if damaged or severely clogged Replacement needles can be ordered for the Model 702 20 Dispense Valve by specifying the proper part number PERIODIC MAINTENANCE DISPENSE TUBE REPLACEMENT Dispense tube life is difficult to predict due to its dependence on the cycles speed downtime and material dispensed A common sign of a worn dispense tube is a reduction in shot volume Inspect the dispense tube periodically and replace if necessary 1 2 Depressurize the syringe or reservoir and remove disconnect it Pressurize the pinch off piston 18 This is the purge mode The dispense tube will now be completely free of compression Loosen the upper and Knobs 12 enough to allow the dispense tube to pass out the side of the valve Install a new dispense tube hub by sliding through the side of the valve Gently tighten the upper and lower screw knobs Return air control to normal operating mode Reinstall the syringe or reservoir and purge the valve One package of replacement dispense tubes is supplied with the unit Additional tubes can be ordered for the Model 702 20 Dispense Valve by specifying the proper part number as shown in the Recommende
4. GPL 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 e 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 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 s
5. Instructions kDa 332093A Dispensit 702 20 EN Usage Statement Depending on valve configuration this valve can be used to dispense the following Wide range of water thin to medium viscosity material Dispense Valve 100psi 0 69 MPa 6 9 bar Maximum Working Pressure Read all warnings and instructions in this manual Save these instructions A Important Safety Instructions See Page 3 for model information including maximum working pressure and approvals PROVEN QUALITY LEADING TECHNOLOGY DISPENSIT MODEL 702 20 DISPENSE VALVE OPERATING amp MAINTENANCE MANUAL Generali IMPORMAMON Aa 3 Safety information ciinei naaa aata anona naaid naneda ada Paad deuaa draean kanais 3 illustration References cccseeseeeeesseeeeeeeeeeeneeeeeeeeaseeeeenesseeesenensseeseonanseees 3 Generali ACCESSOMOS wa 3 Description Of Operation EE 4 SetUp BE TE 4 Mounting Dispense VAlVe wwwwwmmmemmama mami mwiminiwu aes 4 TA IA EE 4 Operating Procedures vivsscicceesteecsetes eeEAAENSS ENNER eebieueniiaceeeeleceeaeaeiavetedens 5 Diy System E e EE 5 Maternal ee ue BEE 5 Remote Mounted Material Supply nnnnnnsnnnennnnnsnnesennnnsnnenenenenrrrsennne 5 Valve Mounted Syringe Material Supply cecccceeeeeeeeeeeeeeeeeeeeeeeeeees 5 Wet System Checkout uk 6 Periodic MAINTON ANCE ii ndecausdeveccenesssessatusene 6 Dispense Needle Hepnlacement 6 Dispense Tube Replacement cccccccssecces
6. T 84 0200 K3 11 kk MODEL 702 20 RECOMMENDED SPARE PARTS Dispense Tube Sampler Package 2 each of Dispense tubes marked Dispense Tube 5542 HU 037 Pack of 10 Dispense Tube 5542 HU 043 Pack of 10 Dispense Tube 5542 HU 050 Pack of 10 A1020220 10 A1020157 10 A1020211 10 A1020212 10 kk Dispense Tube 5542 HU 060 Pack of 10 A1020087 10 Kk Kk Dispense Tube 5542 HU 066 Pack of 10 Dispense Tube 5542 HU 080 Pack of 10 Dispense Tube 5542 HU 100 Pack of 10 Dispense Tube 5542 PP 068 Pack of 10 A1020152 10 A1020213 10 A1020090 10 A1020153 10 Kk kk Dispense Tube 5542 P 100 Pack of 10 Dispense Tube 5542 GP 100 Pack of 10 Needle Sampler Package 10 each of 14 16 18 20 and 22 gauge LG long needles Needle LL 14 ga x 2 Dark Green Pack of 50 Needle LL 14 ga x 1 Dark Green Pack of 50 Needle LL 15 ga x 2 Orange Pack of 50 A1020088 10 A1020221 10 E4000025 50 E4000001 50 E4000014 50 E4000004 50 Needle LL 16 ga x 2 Purple Pack of 50 E4000088 50 Needle LL 16 ga x 1 Purple Pack of 50 E4000005 50 kk Kk Kk kk Needle LL 18 ga x 2 Pin Pack of 50 Needle LL 19 ga x 1 2 Brown Pack of 50 Needle LL 20 ga x 72 Yellow Pack of 50 E4000006 50 E4000008 50 E4000009 50 Needle LL 22 ga x Black Pack of 50 E4000011 50 Needle LL 23 ga x L
7. ceplate 14 onto the Backplate 13 See drawing for orientation Slide the two remaining Spacers 10 into position and install the two remaining flat head Screws 15 through the faceplate and spacers and tighten them Complete the assembly by remounting the valve and installing its dispense tube and needle Attach the material inlet line to the remote material supply or remount the syringe if so equipped 10 Attach the air inlet line Perform the Dry System Checkout Material Loading and Wet System Checkout The valve is ready to be put back in service 21 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 Valve check the electric and pneumatic power Check all control connections for proper installation VALVE CYCLES NOTHING DISPENSED First try to purge the unit this should fix most situations If nothing is dispensed check to see that there is enough pressure to the reservoir Perhaps the reservoir tube needle path is clogged examine and
8. d Spare Parts section of this manual PERIODIC MAINTENANCE DISASSEMBLY ch Turn off the material inlet pressure to the valve Turn off the air intake pressure to the valve Remove the air pressure line and its end fitting from the valve Do not remove the mating fitting that is screwed into the valve Remove the material inlet line if the material supply is remote or remove the syringe if present Remove the dispense valve from its mounting Disconnect the needle needle block and dispense tube fittings Remove the Faceplate 14 by loosening and removing two Screws 15 holding it in place ON 4 5 6 7 8 Loosen and remove two Screws 17 holding the Backplate 13 in place The Backplate 13 the Pinch off Piston 18 and the Spring 7 will come loose from the rest of the valve 9 At this time all four Spacers 10 will be free and may be set aside 10 Disassemble Backplate 13 from pinch off piston assembly 11 Remove the Spring 7 from the Pinch off Piston 18 12 Remove the Bumper 16 from the Backplate 13 hoa A 21 Ney 13 Remove the U cup Seals Note the direction the old seals face as you remove them since the new seals must face the same direction w
9. directement ou indirectement avec les proc dures 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 332093 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
10. hen you install them MODEL 702 20 GENERAL ILLUSTRATION 2 ZA Za 2 Z 13 r WEI L VARIOUS T yi d 7 if I e y A EN a r K ting E SS 2 Hose Connector 1 8 typical 4 ScrewH10 32 ai AI 5 sde Base Assembly 16 Bumper C 6 Fitting 10 32 x 1140D Tube Swai mm S E rafen W S J ao nyon Gase S Nede SS 21 Dispense Tube Wa ER Knob Dispense Tube Removal PERIODIC MAINTENANCE ASSEMBLY WANI a D N 8 9 Install the lubricated U cup Seal 8 on the Pinch off Piston 18 Insert the Bumper 16 into the Backplate 13 Insert the Spring 7 into the Pinch off Piston 18 Set the pinch off piston assembly on top of the Cylinder Base Assembly 5 Use a blunt tool to carefully tuck the U cup Seal 8 in while easing the piston into the Cylinder Base Assembly 5 See drawings for piston orientation Compress the Spring 7 with a small screwdriver or other tool to assist in placing the Backplate 13 in position Be sure the Spring 7 is centered under the Backplate 13 Insert the two Spacers 10 and install two flat head Screws 17 and tighten them to tie the Backplate 13 down Place the Fa
11. ight Blue Pack of 50 E4000024 50 Needles are included in Needle Sampler Package The quantity 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 Inc 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 e 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 Re use of O rings is not recommended Only re use O rings 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 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 203
12. p has been properly completed Conduct the dry system checkout without any material in the system 1 Attach the color coded pneumatic pressure line from the fitting 6 to the color coded cycle air outlet on the air supply controller 2 Turnon the electric and air supply 3 Setthe air pressure to 4 8 bar 70 psi on the system pressure gauge 4 Inthe normal rest position the pinch off piston 18 is held back by the spring 7 sealing the dispense tube 21 5 Momentarily press the dispense valve cycling control switch The pinch off piston 18 is pressurized to release the dispense tube The controller dispense valve air solenoid valve should cycle and cause a slight fluctuation in the system pressure gauge When this happens the system is correctly installed MATERIAL LOADING REMOTE MOUNTED MATERIAL SUPPLY If the material supply is remote mounted then connect material supply tubing to the Dispense Valve material inlet luer lock fitting When using a remote reservoir the material supply tubing and fittings must be compatible with the material being dispensed and be capable of withstanding the dispensing pressure VALVE MOUNTED SYRINGE MATERIAL SUPPLY 1 Place the filled syringe of material through the syringe clamp mating the syringe to the male luer lock fitting on the dispense tube turning until snug do not over tighten 2 Hand tighten the syringe clamp using the adjustment knob until snug 3 Install the receiver cap as
13. pots 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 eguipment 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 equipment 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 misapplica
14. sccesececsceseeesesseeensneeseesenees 7 SASS Le E 8 Model 702 20 General Ilustraton 9 ENEE 10 e Ee le e due BE 11 Model 702 20 Recommended Spare Patts cccccccccseesesseeeeeeeseeeeeeenseeeeees 12 General Guidelines for O rings and U cup Seals cccccsssssseeeeeeeeeeeeees 13 Warra MV EE 14 GENERAL INFORMATION The Model 702 20 Dispense Valve is designed for applications that reguire ON OFF dispensing of beads and or dots It has dispensing capability for material viscosities ranging from water type material to high viscosity epoxies and metal filled pastes This valve also has a fail safe design to prevent material dump ing in case of a power failure All wetted parts are disposable for easy maintenance and cleaning The 702 20 ships complete with the following Model 702 20 Dispense Valve One 3 foot 9 m section of pneumatic air line One package of replacement dispense tubes type as ordered Seal Kit Operating and Maintenance Manual Syringe comes with syringe option Optional syringe clamp comes with syringe option Receiver Cap with air lines comes with syringe option 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
15. sembly to the top of the syringe 4 Attach the air line to the regulator and set the air pressure control to 1 0 bar 15 psi or to the setting required for the application RECEIVER CAP E ADJUSTMENT _ KNO Ce Ss A KN a BS N SS NOB NN E 5 e 1144 AS IN N i SV T 2 Z f ins d LUER LOCK FITTING SYRINGE OPTION 3cc SHOWN OPERATING PROCEDURES WET SYSTEM CHECKOUT Using the purge cycle on the air supply controller run the material through the dispense line until a smooth material flow is observed through the dispensing needle After the purge cycle has been completed set the air supply controller to the manual cycle mode and cycle the Dispense Valve several times PERIODIC MAINTENANCE The Model 702 20 Dispense Valve has been engineered for easy cleanup with a disposable dispense tube and luer lock needle WARNING Do not attempt disassembly or cleaning of the unit while it is under pressure DISPENSE NEEDLE REPLACEMENT Remove the luer lock dispensing needle by grasping at the base and twisting one quarter turn counter clockwise Clean with water or solvent depending on the material dispensed A fine wire
16. son 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 legal 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 proc dures judiciaires ex cut s donn s ou intent s a la suite de ou en rapport
17. the dispense tube to prevent material drip The system is again in the normal ready state L E e mz SETUP PROCEDURE MOUNTING DISPENSE VALVE For optimum operation the Model 702 20 Dispense Valve must be mounted on a 1 2 inch 12 7 mm support rod post or frame When mounting affix the valve firmly in place by tightening the socket head cap screw 4 with a 5 32 inch Allen wrench Depending on the application the valve may be tilted to a maximum of 60 from the vertical AIR CONTROLLER Operation of the Model 702 20 Dispense Valve requires a controller that can provide the following A minimum of 0 5 SCFM 2 3 cm of dry unlubricated air ata minimum pressure of 4 8 bar 70 psi and a maximum of 6 9 bar 100 psi Time delay capability to allow the valve to cycle Independent air pressure regulators for material reservoir and valve operation Purge capability which is the ability for the operator to pass or not pass air to the pinch off piston 18 on the dispense valve 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 controller and syringe OPERATING PROCEDURES DRY SYSTEM CHECKOUT This is an initial checkout to determine if the setu
18. tion 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 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 per
Download Pdf Manuals
Related Search