Graco 307892K User's Manual
Contents
1. Use the equipment only for its intended purpose If you are not sure call Graco Technical Assis tance at 1 800 543 0339 Do not alter or modify this equipment Check equipment daily Repair or replace worn or damaged parts immediately Do not exceed the maximum working pressure of the lowest rated system component The maxi mum working pressure of this equipment is 5000 psi 350 bar Use fluids and solvents which are compatible with the equipment wetted parts Refer to the Tech nical Data section of all equipment manuals Read the fluid and solvent manufacturer s warnings Wear hearing protection when operating this equipment Comply with all applicable local state and national fire electrical and safety regulations SKIN INJECTION HAZARD Spray from the gun leaks or ruptured components can inject fluid into your body and cause extremely serious injury including the need for amputation Fluid splashed in the eyes or on the skin can also cause serious injury e Fluid injected into the skin might look like just a cut but it is a serious injury Get immediate surgical treatment Follow the Pressure Relief Procedure on page 5 if the spray tip clogs and before cleaning checking or servicing the equipment Do not stop or deflect leaks with your hand body glove or rag Be sure all equipment safety devices are operating properly before each use 2 307892 Installation NOTE The Typical Installations shown in Fig 12. are instructed to relieve the pressure e stop spraying e check or service any of the system equipment e or install or clean the spray tip 1 Lock the gun trigger safety and other equipment safety locks 2 Turn off the power to the pump 3 Unlock the gun trigger safety 4 Hold a metal part of the gun firmly to the side of a grounded metal pail and trigger the gun to relieve pressure 5 Lock the gun trigger safety 6 Open the drain valve required in your system having a container ready to catch the drainage 7 Leave the drain valve open until you are ready to spray again If you suspect that the spray tip or hose is completely clogged or that pressure has not been fully relieved after following the steps above very slowly loosen the tip guard retaining nut or hose end coupling and relieve pressure gradually then loosen completely Now clear the tip or hose Cleaning A WARNING To reduce the risk of serious injury whenever you are instructed to relieve pressure always follow the Pressure Relief Procedure at left Flush the back pressure valve whenever the rest of the system is flushed Before flushing relieve pressure then open the valve by turning the adjusting screw counterclockwise to open the valve Before removing the back pressure valve for thorough cleaning and inspection relieve pressure Then remove the valve and clean and inspect all parts CAUTION Do not allow paint or s
3. Instructions Parts List HIGH PRESSURE STAINLESS STEEL WATERBASE COMPATIBLE 7ee Back Pressure Valve with Carbide 307892K Needle and Seat an For use in air assisted circulating system to control back pressure to the gun s and maintain proper pressure for circulation Also for use with XM proportioners as an adjustable restriction valve For professional use only 7250 psi 50 MPa 500 bar Maximum Fluid Inlet Pressure 150 7250 psi 1 50 MPa 10 500 bar Fluid Back Pressure Range Part No 222200 Series D Important Safety Instructions Read all warnings and instructions in this manual Save these instructions Table of Contents A WarminGSis ca rennes 2 0 Installation 3 Y Operation 4 7e eed eve Patins een ne 4 Cleaning and Maintenance 6 PASS ES nt uae Satins pote ee car 7 ACCeSSories auae 13 can en gee idl wish dc 7 Technical Data 7 DIMENSIONS 2e are dard surtt 8 Performance Chart 9 Warranty scene see anale aus neue 10 Graco Information 10 PROVEN QUALITY LEADING TECHNOLOGY A WARNING EQUIPMENT MISUSE HAZARD Equipment misuse can cause the equipment to rupture or malfunction and result in serious injury ee NA INSTRUCTIONS i s This equipment is for professional use only Read all instruction manuals tags and labels before operating the equipment
4. alve il 1 G J Air Assisted Airless Spray Gun m EL z K Back Pressure Valve el UE L Fluid Return Line B M Main Circulating Line ef A N Fluid Supply Container r m D G TT T N Multiple Circulating Spray Station Fig 1 307892 3 Operation NOTE The back pressure valve controls pressure 3 Adjust the pump air pressure and the back pres ahead of the valve inlet When used with XM propor sure valve for the best spraying combination and tioners the it controls the flow across the valve the proper circulation of fluid Use the lowest possible air and fluid pressures for your applica tion 1 Back the adjusting screw out to allow full fluid flow 4 Tighten the locking nut 3 to lock the setting 5 Record all the settings for future reference 2 Turn the screw clockwise to increase the back NOTE See the XM Mix Manifold Kits manual for more pressure less flow and counterclockwise to information about how the valve operates as a ma decrease it more flow chine mounted restrictor valve 4 307892 Cleaning and Maintenance Pressure Relief Procedure A WARNING SKIN INJECTION HAZARD La The system pressure must be manually relieved to prevent the system from starting or spraying accidentally Fluid under high pressure can be injected through the skin and cause serious injury To reduce the risk of an injury from injection splashing fluid or moving parts follow the Pressure Relief Procedure whenever you e
5. are only guides for selecting and installing a circulating system Contact your Graco representative or Graco Technical Assistance see back page for assistance in designing a system to meet your particular needs Install the back pressure valve K in the spray gun return line L as shown in the Typical Installation drawing below or at right Using pipe sealant on pipe threads connect the lines to the 3 8 npt f inlet and outlet Be sure the flow direction agrees with the markings on the valve housing If more than one spray station is used install a back pressure valve K in the circulating line M after the last spray station to maintain proper system pressures NOTE The two 1 4 20 tapped mounting holes on the side of the valve housing are for mounting the valve when flexible fluid lines are used The back pressure valve was tested in lightweight oil Flush the entire system with a solvent compatible with the fluid being sprayed or dispensed then test the system The new system must be cleaned and tested thor oughly before admitting fluid to the back pressure valve to avoid contaminants clogging or damaging the valve M E P C KEY A Air Regulator A B L 5 B Bleed Type Master Air Valve i C Pump DZ iy B D Fluid Filter amp Drain Valve Q pe al K E Main Fluid Supply Line LS BE 5 F Gun Fluid Supply Line I G Fluid Regulator NEN gt 2 H Fluid Pressure Gauge umj H ei ped 05 amp Drain V
6. be liable for 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 with Graco equipment of structures accessories equipment or materials not supplied by Graco or the improper design manufacture instal lation 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 claim 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 DISCLAIMERS AND LIMITATIONS The terms of this warranty constitute purchaser s sole and exclusive remedy and are in lieu of any other warranties express or implied including warranty of merchantability or warranty of fitness for a particular purpose and of any non contractual liabilities including product liabilities based on negligence or strict liability Eve
7. ngsten Carbide LE y pee es Torque to 30 35 ft lb 41 47 Nem Install with larger opening facing up Lubricate Apply thread lubricant Black IN ae ig ee White ng O A 8 DD 307892 7 Dimensions 1 4 20 UNC 2B Bracket Holes 3 8 18 npt Inlet amp Outlet 4 75 in 120 7 mm 0 87 in 2 5 in 1 99 in 22 1 mm 63 5 mm 50 5 mm 1 3 in 33 mm f Bracket Holes OUT BOTTOM VIEW 8 307892 min GPM FLUID FLOW 15 k O 4 5 Performance Chart TEST MEDIA 65 centipoise 4 0 KEY 5000 psi 350 bar 2000 psi 140 bar 3 5 1000 psi 70 bar 3 0 2 5 00 w gt 300 psi 21 bar 2 0 gt ou 1 5 1 0 0 5 0 0 0 0 0 5 1 0 15 20 25 30 35 4 0 NUMBER OF TURNS 307892 9 The Graco Warranty and Disclaimers WARRANTY Graco warrants all equipment manufactured by it and bearing its name to be free from defects in material and workmanship on the date of sale to the original purchaser for use As purchaser s sole remedy for breach of this warranty Graco will for a period of twelve months from the date of sale repair or replace any part of the equipment proven 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
8. olvent to set in the system for any extended length of time Fluid could dry on the valve stem causing leakage at the stem packing If leakage occurs disassemble and clean the valve CAUTION Handle the hard carbide parts valve stem tip 2 and seat 10 carefully to avoid damaging them Damage will cause poor operation and leakage 307892 5 Cleaning and Maintenance Seat and Valve Stem Replacement See the Parts Drawing on page 7 NOTE Order Kit No 223016 to repair the back pres sure valve A WARNING To reduce the risk of serious injury whenever you are instructed to relieve pressure always follow the Pressure Relief Procedure on page 5 1 Relieve the pressure Then remove the back pressure valve from the fluid line 2 Unscrew the seat housing 11 from the valve housing 1 3 Remove the valve seat 10 spring 8 and o rings 7 9 from the seat housing 11 4 Remove the retaining ring 6 and valve stop 5 from the valve housing 1 6 307892 5 10 11 12 Remove the locking nut 3 from the valve stem 2 Remove the valve stem 2 Clean and inspect all parts Replace all o rings with those provided in Kit No 223016 Be sure to lubricate all the o rings and the spring Install o rings 4 and 13 on the valve stem 2 Install the stem into the valve housing 1 Install the valve stop 5 over the tip of the valve stem 2 Install retaining ring 6 into the
9. ry form of liability for direct special or consequen tial damages or loss is expressly excluded and denied In no case shall Graco s liability exceed the amount of the purchase price Any action for breach of warranty must be brought within two 2 years of the date of sale EQUIPMENT NOT COVERED BY GRACO WARRANTY Graco makes no warranty and disclaims all implied warranties of merchantability and fitness for a particular purpose with respect to accessories equipment materials or components sold but not manufactured by Graco These items sold but not manufactured by Graco such as electric motor 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 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 distributor closest to you Phone 612 623 6921 or Toll Free 1 800 328 0211 Fax 612 378 3505 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 Original instructions This manual contains English MM 307892 Graco Headquarters Minneapolis International Offices Belgium China Japan Korea GRACO INC P O BOX 1441 MINNEAPOLIS MN 55440 1441 Cop
10. valve housing 1 Slide the o ring 9 onto the valve seat 10 Install the valve seat into the valve housing 1 with its inside chamfer facing towards the valve stem 2 Grease the spring 8 and install it into the seat housing 11 Install the o ring 7 on the seat housing Apply sealant to the seat housing threads and screw it into the valve housing 1 Torque to 30 35 ft lbs 41 47 Nem Parts 9 104319 O RING PTFE 10 183951 SEAT valve 11 187884 HOUSING seat 124 185052 LABEL warning not shown 13 113137 O RING CU 75 These parts are included in Repair Kit 223016 which may be purchased separately Ref No PartNo Description Qty 1 187883 HOUSING valve 1 2 235205 STEM valve 1 3 110005 NUT hex jam 5 16 24 UNF 1 4 110004 O RING PTFE 1 5 188013 STOP valve 1 6 188003 RING retainer 1 7 110135 O RING PTFE 1 8 111738 SPRING compression 1 1 1 A Replacement Danger and Warning labels tags and cards are available at no cost Accessories Bracket Kit 222515 To attach back pressure valve to cart pail or wall units Technical Data Maximum fluid input pressure 7250 psi 500 bar Back pressure range 150 5000 psi 10 350 bar Maximum flow capacity 4 5 gpm 17 Ipm at 135 centipoise fluid viscosity Weight 2 55 seen air amine Resets 2 35 Ib 1 06 kg Wetted parts PTFE CU 75 304 amp 316 Stainless Steel 17 7 ph Stainless Steel Tu
11. yright 1998 Graco Inc is registered to ISO 9001 www graco com Revised 07 2010 10 307892
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