Gravity Gun User`s Manual
Contents
1. HVLP PAINT HVLP PAINT SPRAY SYSTEM SYSTEM Users Manual Gravity Gun GG Smith Eastern Corporation 10630 S Riggs Hill Road e Jessup Maryland 20794 9425 USA 301 497 7600 e 800 937 HVLP 4857 e Fax 301 497 7613 gravity airverter com e www airverter com Compliance Quality Performance Reliability 2000 Smith Eastern Corporation AirVerter Gravity Gun HVLP Paint Spray System DO NOT OPERATE SPRAY GUNS WITHOUT PERSONAL SAFETY EQUIPMENT AirVerter Gravity Gun HVLP Paint Spray System Please Read This Owner s Manual BEFORE Using Your Gravity Gun DO NOT OPERATE THIS EQUIPMENT WITHOUT USING PROPER PERSONAL SAFETY EQUIPMENT INCLUDING RESPIRATOR GOGGLES AND SAFETY CLOTHING OBSERVE ALL PRECAUTIONS RELATED TO SPRAYING WARNING THIS EQUIPMENT IS OPERATED USING PRESSURIZED AIR ALWAYS DISCONNECT SPRAY GUN FROM AIR AND FLUID HOSES AND DEPRESSURIZE SYSTEM PRIOR TO ANY MAINTENANCE OR DISASSEMBLY PROCEDURE WARRANTY Smith Eastern Corporation warrants to the Purchaser that the GG 100 Gravity Gun is free from defects in material or workmanship under normal use and service for a period of twelve 12 months from the date of purchase Should any failure appear during this period Smith Eastern shall if given prompt written notice by the Purchaser correct such nonconformity by repair or replacement of the nonconforming part F O B Smith Eastern s repair facility Repair parts are warranted for ninety 90 days fro2. wood or 50 to 70 PSI compressor pressure metal 80 Solids Coatings Ultra high production levels on extremely large surfaces 60 to 80 PSI compressor pressure un thinned epoxies enamels latex urethane WARNING Gun must be de pressurized prior to any maintenance or disassembly procedure Disconnect all air hoses prior to performing any maintenance operation Cleaning the Gravity Gun D Clogged holes should never be cleaned with hard objects as the smallest amount of Cleaning and Gun Care damage may badly influence the spray A Remove the Air Cap and Ring and clean with pattern solvent E Packing must be slightly lubricated after B Flush gun thoroughly with solvent cleaning of gun C Clean nozzle with brush Never place the whole gun in solvent Spray Gun Performance Is Directly Related To How Well The Gun Is Cleaned After Use DO NOT OPERATE SPRAY GUNS WITHOUT PERSONAL SAFETY EQUIPMENT A B AirVerter Gravity Gun HVLP Paint Spray System Lubricate Use Vaseline or a non silicone grease to lubricate the gun Lubricate all threaded connections for ease of maintenance C D Lubricate the Needle only where it passes through the needle packings DO NOT allow lubricant to get into the Fluid Tube Nozzle Air Cap or interior of the paint chamber areas where paint may come in contact with lubricant Gun Head Disassembly and Re assembly Instructions Note Gun Head disassembly is not re
3. Fluid Inlet Fitting and tighten to approx 175 in lb torque Tighten the Lock Nut against the Gun Body DO NOT OPERATE SPRAY GUNS WITHOUT PERSONAL SAFETY EQUIPMENT AirVerter Gravity Gun HVLP Paint Spray System Gravity Gun Illustrated Parts Breakdown DO NOT OPERATE SPRAY GUNS WITHOUT PERSONAL SAFETY EQUIPMENT AirVerter Gravity Gun HVLP Paint Spray System Gravity Gun Parts List Part NSN Description 1 amp 2 GG 001 xx 4940 01 481 0571 Air Cap with Ring 3 GG 003 xx Fluid Nozzle Tip 4 GG 002 Fluid Nozzle Body 5 GG 005 Nozzle Carrier 6 GG 006 Air Cap Adapter 7 Note 1 O Ring 8 Note 1 O Ring 9 Note 1 Seal 10 GG 010 Lock Nut 11 GG 011 Fluid Inlet Fitting 12 GG 012 Gun Body HVLP 13 GG 013 Fan Control Assembly 14 GG 014 xx Fluid Needle 15 GG 015 Fluid Control Knob 16 Note 1 Spring Seat 17 Note 1 Needle Return Spring 18 GG 018 Rear Bushing 19 Note 1 Seal 20 GG 020 Air Valve Assembly 21 GG 021 Air Valve Poppet 22 Note 1 O Ring 23 Note 1 Air Valve Spring 24 GG 024 Needle Seal Cartridge 25 GG 025 Trigger 26 GG 026 Air Control 27 GG 027 Air Inlet Fitting 28 GG 028 Trigger Pivot Set 29 Allen Plug 30 GG 030 Cup Lid 3 pack for Stainless Steel cup 31 GG 029 Gravity Feed Cup Aluminum 750 cc Std Note 1 These parts are contained in the High Wear Kit Part GG 125 DO NOT OPERATE SPRAY GUNS WITHOUT PERSONAL SAFETY E
4. QUIPMENT AirVerter Gravity Gun HVLP Paint Spray System Needle Nozzle and Air Cap Selection Guide Select the proper fluid nozzle and needle for the material to be sprayed Needle and nozzle are a matched set machined to act as a valve Replace the Needle and Nozzle when the Needle protrudes approximately 3 32 beyond the Nozzle Needle Air Uses oF Coatina Tvoe Compressor Nozzle Cap g yP Air Pressure Ultra Fine Finish With Thin Coatings on Small Parts Ultra Fine Touch Up 5 Gen 45 50 Specialty Applications Wood Working Water Based Lacquers Urethanes Automotive Base or Clear Coat Top Coats For Automotive Aviation and Marine Use 5 Wood Lacquers Stains Polyurethanes Varnishes 45 55 Thin Specialty Coatings With Low Mil Build and Fine Finish Requirements Water Based Coatings Higher Production For The Same Applications As Above 10 Fine Finish With Gloss Alkyd Enamel Primers and 55 65 Sealers For Automotive Aviation and Marine Water Based Coatings Ultra Fine Finish 0 Excellent Finish Good Production Good Finish High Production Excellent Finish Good Production General Industrial Finishing Zinc Rich Primers Water Based Primers Flat amp Semi Gloss Alkyd Enamels amp Polyurethanes Industrial Marine Top Coats Chlorinated Alkyd 65 75 Enamels Acrylic Enamels and Latex Best with Heavy Primers CARC Best Finish High Production High Production Industrial Marine Primers High Build Primers Steel 75 85
5. Structures Latex Good Finish CARC wr Higher 2 0 20 Industrial Finish Coatings 85 90 Production Latex Stripper Oil Measured at the gun handle 7 1 0 1 2 1 4 1 7 Nozzle Size Expressed in Millimeters 1 Millimeter 040 Approximately 0 7 028 1 0 040 1 2 048 1 4 056 1 7 067 2 0 080 DO NOT OPERATE SPRAY GUNS WITHOUT PERSONAL SAFETY EQUIPMENT Paint Will Not Flow Inconsistent Spray Pattern Spits and Sputters Leakage at Front of Gun Distorted Spray Pattern AirVerter Gravity Gun HVLP Paint Spray System Gravity Gun Troubleshooting Guide Blockage in fluid nozzle Loose fluid nozzle Coating is too thick Loose needle packing Running out of paint Loose needle packing Damaged fluid needle Wrong size fluid needle Dirty fluid nozzle Impurities in paint Loose fluid nozzle Fluid adjustment screwed all the way out Needle not firmly seated in the nozzle Packing too tight Dirty or damaged air cap Dirty or damaged fluid nozzle or needle Fluid nozzle partially clogged Fluid nozzle not centered with air cap Air cap not seated correctly Clean or replace strain paint Tighten Thin the coating Adjust packing Fill cup or pot but never the top 1 4 Adjust packing Replace Replace Clean Strain paint Tighten Rotate Fluid Control Knob GG 015 on rear of gun clockwise Check for nozzle obstruction Loosen
6. achieved by turning the Fan Control Knob clockwise 2 Full Fan Pattern used with the spray gun 6 8 from the work Overlap not more than DO NOT OPERATE SPRAY GUNS WITHOUT PERSONAL SAFETY EQUIPMENT AirVerter Gravity Gun HVLP Paint Spray System 50 of the previous pass Do not fog the same time to maintain even paint coat This pattern is achieved by turning the distribution Fan Control Knob counterclockwise C If you are having problems with the operation 3 The full fan pattern may be reduced in size of your paint gun check the Trouble Shooting by gradually turning the Fan Control Knob Guide at the end of the manual for possible clockwise Fluid flow must be reduced at causes and solutions Air and Paint Management Guidelines Approximate PSI Application Thin Coatings Machines and implements small parts plant maintenance ZAHN 2 Test 16 to 22 seconds controlled production work work in enclosed areas with Minimum 40 PSI compressor pressure poor ventilation priming Thin to Medium Coatings Dual gun work for all of the above listed applications will ZAHN 2 Test 22 to 30 seconds support up to 50 of 3 8 ID hose for each gun Also for 40 to 60 PSI compressor pressure higher production levels of all of the above High Solid Coatings Marine epoxies marine enamels high production steelwork high production with conveyer lines large ZAHN 3 Test 37 seconds surfaces with thinner viscosity material latex on
7. and adjust to correct tension Clean or replace Clean or replace Clean Replace air cap Re seat air cap DO NOT OPERATE SPRAY GUNS WITHOUT PERSONAL SAFETY EQUIPMENT AirVerter Gravity Gun HVLP Paint Spray System GG 125 High Wear Maintenance Kit For GG 100 Gravity Gun rene ene Teco Tom E e S o E s s o eee mon ELE o DO NOT OPERATE SPRAY GUNS WITHOUT PERSONAL SAFETY EQUIPMENT
8. ay alter this setting To adjust needle packings to proper tension 1 With gun disconnected from air and fluid sources pull trigger to move the needle out of the nozzle 2 Adjust packing nut until needle is held in the open position by tension from the needle packings 3 Loosen packing nut approximately 1 4 turn or until needle returns to closed position 4 Connect air supply hose to the Air Inlet Fitting GG 027 at handle of gun 5 The Air Control Valve GG 026 in the gun handle can be used to adjust gun inlet pressure 6 Screw the Paint Cup GG 031 onto the Fluid Inlet Fitting GG 011 Spraying Gravity forces paint from the paint container into the fluid chamber of the gun and out through the nozzle where the flow of atomizing air breaks the paint stream into tiny particles creating the spray 1 Needle position controls the amount of paint flowing through the fluid nozzle 2 Trigger action controls needle position 3 The Fluid Control Knob GG 015 at the rear of the spray gun controls trigger action Turning the knob to the right reduces the fluid flow turning it to the left increases the flow Adjust the pattern by turning the Fan Control Assembly GG 013 at the rear of the Spray Gun 1 Round Pattern used to draw fine lines with the gun close to the work for touch up work camouflage patterns and painting surfaces in difficult to reach places distant from the spray gun This pattern is
9. commended for normal cleaning and maintenance Gun Head Disassembly To remove the nozzle carrier and air cap adapter A B Remove the Air Cap GG 001 Fluid Nozzle Body GG 002 and Fluid Needle GG 014 Remove the Needle Seal Cartridge GG 024 Loosen the Lock Nut GG 010 on the Fluid Inlet Fitting GG 011 Unscrew the Fluid Inlet Fitting from the gun The Nozzle Carrier GG 005 and Air Cap Adapter GG 006 will now slide forward from the Gun Handle GG 012 Note a seal will remain in the gun body and should not be removed The Copper Gasket and Lower Seal should be replaced GG 011 GG 010 Upper Seal s GG 012 la eS Copper Gasket ta Lower Seal Gun Head Re assembly A m Thread the Lock Nut back against the hex on the Fluid Inlet Fitting Slide seal onto the Fluid Inlet Fitting Thread the copper gasket onto the Fluid Inlet Fitting Install O ring onto the Air Cap Adapter Slide the Nozzle Carrier into the Air Cap Adapter and rotate until the inlet port in the Nozzle Carrier is aligned with the hole in the Air Cap Adapter the two will lock together in this position Holding the Nozzle Carrier and Air Cap Adapter together in the position described slide them into the gun head and rotate until the locating pin is aligned with the slot in the Gun Body and slide further into the Gun Body Install the Needle Seal Cartridge and tighten to approx 150 175 in Ib torque Install the
10. he PSI required to satisfactorily spray your coating High Pressure Air Hose A Air hose lengths up to 50 feet MUST have an I D of 3 8 including fittings B Air hose lengths greater than 50 feet MUST have an 1 D of 1 2 including fittings OPERATING INSTRUCTIONS OPERATION Starting A The Gravity Gun GG 100 Spray Gun operates with the trigger controlling both the fluid flow and air flow B Consult the Needle Nozzle and Air Cap Selection Guide to select the proper combination for the coating and finish quality desired Too much pressure will create unnecessary overspray Before Spraying A Follow the Air and Paint Management Guidelines listed on the following page B Before paint is poured into the cup make certain paint is properly mixed This is particularly true when mixing multi component paints Use a paint shaker rotary mixer or paint paddle to achieve a homogeneous mixture Hint Split your paint into two parts the top will be lighter and the bottom will be heavier Completely stir the bottom half of the paint and slowly add small amounts of the top half into the heavier bottom C Strain your paint to remove impurities Use a cone strainer or a 100 mesh nylon bag or equivalent strainer D Thin your paint according to the manufacturer s specifications E Ensure needle packings are properly adjusted Needle packings are preset at the factory to proper tension However use and cleaning m
11. m the date of shipment but repairs or replacements to original equipment shall not renew or extend the warranty period of such equipment Equipment and parts furnished by Smith Eastern but manufactured by others shall be limited to the warranty offered by the manufacturer thereof Smith Eastern reserves the right to limit this warranty in cases of misuse or abuse Any modifications to spray guns or recommended procedures will void the warranty The foregoing warranty is exclusive and in lieu of other warranties of quality or performance expressed implied or statutory including any warranties of merchantability or of fitness for a particular purpose Why Airverter Spray Gun Systems Work Better To accomplish effective atomization of a liquid at low pressure below 10 PSI it is necessary to substantially decrease pressure PSI and increase air volume CFM AirVerter systems by design do not exceed 10 PSI at the spray head and prevent the operator from taking AirVerter spray guns out of compliance with EPA and California s South Coast Air Quality Management District SCAQMD regulations DO NOT OPERATE SPRAY GUNS WITHOUT PERSONAL SAFETY EQUIPMENT AirVerter Gravity Gun HVLP Paint Spray System EQUIPMENT REQUIREMENTS Air Compressor Air compressors used with AirVerter Spray Guns must be able to HOLD a minimum of 40 PSI while spraying Note Position a pressure gauge in the air hose nearest the spray gun to be assured of t
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